Display device

Abstract

A display device is provided. The display device includes a first electrode extending in a first direction, a second electrode spaced apart from the first electrode in a second direction and extending in the first direction, a first insulating layer disposed on the first electrode and the second electrode, a light emitting element disposed on the first insulating layer and having one end disposed on the first electrode or the second electrode, a second insulating layer disposed on the light emitting element and extending in the first direction, a first connection electrode disposed on the first electrode so as to be in electrical contact with the light emitting element, and a second connection electrode disposed on the second electrode so as to be in electrical contact with the light emitting element, wherein each of the first connection electrode and the second connection electrode includes a main portion in contact with the light emitting element and a sub-portion having a width smaller than a width of the main portion and connected to the main portion.

Description

Technical Field

[0001] The disclosure relates to a display device. Background Technology

[0002] With the development of multimedia technology, display devices are becoming increasingly important. As a result, various display devices such as organic light-emitting diode (OLED) display devices and liquid crystal display (LCD) devices are now in use.

[0003] Typical display devices include display panels such as organic light-emitting display panels or liquid crystal display (LCD) panels. Light-emitting display panels may include light-emitting elements. For example, light-emitting diodes (LEDs) include organic light-emitting diodes (OLEDs) that use organic materials as fluorescent materials and inorganic LEDs that use inorganic materials as fluorescent materials. Summary of the Invention

[0004] Technical issues The disclosed aspect provides a display device capable of controlling the number of connected light-emitting elements so that sub-pixels have uniform brightness.

[0005] It should be noted that the aspects of this disclosure are not limited to those described above, and other aspects not mentioned herein will be clearly understood by those skilled in the art from the following description.

[0006] Technical solution According to a disclosed embodiment, a display device may include: a first electrode extending in a first direction; a second electrode spaced apart from the first electrode in a second direction and extending in the first direction; a first insulating layer disposed on the first electrode and the second electrode; light-emitting elements disposed on the first insulating layer, each of the light-emitting elements having at least one end disposed on the first electrode or the second electrode; a second insulating layer disposed on the light-emitting element and extending in the first direction; a first connecting electrode disposed on the first electrode and electrically contacting the light-emitting element; and a second connecting electrode disposed on the second electrode and electrically contacting the light-emitting element, wherein each of the first connecting electrode and the second connecting electrode may include a main portion electrically contacting the light-emitting element and a sub-portion having a width smaller than the width of the main portion and electrically connected to the main portion.

[0007] The first distance between the first main part of the first connecting electrode and the second main part of the second connecting electrode can be smaller than the second distance between the first sub-part of the first connecting electrode and the second sub-part of the second connecting electrode.

[0008] The first distance can be smaller than the length of each of the light-emitting elements extending in one direction.

[0009] The second distance can be greater than the length of each of the light-emitting elements extending in one direction.

[0010] The third distance between the first electrode and the second electrode can be smaller than the length of each of the light-emitting elements.

[0011] The light-emitting element may include: a first type of light-emitting element having an end that is electrically in contact with a first main portion of a first connecting electrode and a second main portion of a second connecting electrode; and a second type of light-emitting element having at least one end that is not in contact with the first connecting electrode and the second connecting electrode and is spaced apart from the first sub-portion of the first connecting electrode or the second sub-portion of the second connecting electrode in a second direction.

[0012] At least a portion of the second type of light-emitting element may have an end that does not contact the first connecting electrode and the second connecting electrode and is spaced apart from the first sub-part of the first connecting electrode and the second sub-part of the second connecting electrode in a second direction.

[0013] The second insulating layer can be stacked with the first type of light-emitting element and the second type of light-emitting element, and the first main part and the second main part can respectively contact the side surface of the second insulating layer disposed on the light-emitting element.

[0014] The display device may further include: a dam surrounding an emitting region including a light-emitting element and a sub-region spaced apart from the emitting region in a first direction, wherein a first sub-part and a second sub-part may extend from one side of a first main part and a second main part, respectively, in the first direction, and may be disposed in the sub-region.

[0015] The first connecting electrode may include a first electrode contact disposed in the sub-region and electrically connected to a first sub-part of the first connecting electrode, and the second connecting electrode may include a second electrode contact disposed in the sub-region and electrically connected to a second sub-part of the second connecting electrode, and the first electrode contact and the second electrode contact may respectively make electrical contact with the first electrode and the second electrode.

[0016] The first connecting electrode may further include another first sub-part electrically connected to the first main part of the first connecting electrode on the opposite side in the first direction, and the second connecting electrode may further include another second sub-part electrically connected to the second main part of the second connecting electrode on the opposite side in the first direction, and the emitting region may include: a light-emitting region including the first main part and the second main part; and a non-light-emitting region including the first sub-part and the second sub-part, as a region other than the light-emitting region.

[0017] The length of the second insulating layer, measured in the first direction, can be greater than the width of the light-emitting region in the first direction.

[0018] According to a disclosed embodiment, a display device may include: electrodes extending in a first direction and spaced apart from each other in a second direction perpendicular to the first direction; the electrodes may include a first electrode, a second electrode spaced apart from the first electrode in the second direction, a third electrode disposed between the first electrode and the second electrode, and a fourth electrode spaced apart from the second electrode in the second direction; a first insulating layer disposed on the electrodes; a first light-emitting element having ends respectively disposed on the first electrode and the third electrode, and disposed in the first direction; a second light-emitting element having ends respectively disposed on the second electrode and the fourth electrode, and disposed in the first direction; and a second insulating layer including a first insulating layer disposed on the first light-emitting element and extending in the first direction. The device includes a patterned portion and a second patterned portion disposed on a second light-emitting element and extending in a first direction; and a connecting electrode, including a first connecting electrode disposed on a first electrode, a second connecting electrode disposed on a second electrode, a third connecting electrode disposed across the first electrode and a third electrode, a fourth connecting electrode disposed across the third electrode and a fourth electrode, and a fifth connecting electrode disposed across the second electrode and the fourth electrode, wherein each of the connecting electrodes may include a main portion electrically contacting the light-emitting element and a sub-portion having a width smaller than the width of the main portion and electrically connected to the main portion, the main portion and the sub-portion of each of the connecting electrodes may be spaced apart from the connecting electrode in a second direction and face the connecting electrode, and the first distance between the main portions may be smaller than the second distance between the sub-portions.

[0019] The first distance can be smaller than the length of the light-emitting element extending in one direction.

[0020] The second distance can be greater than the length of the light-emitting element extending in one direction.

[0021] The light-emitting element may include: a first type of light-emitting element having an end that is electrically in contact with a main portion of each of the connecting electrodes; and a second type of light-emitting element having at least one end that is not in contact with the connecting electrodes and is spaced apart from a sub-portion of each of the connecting electrodes in a second direction.

[0022] The second insulating layer may include: a first support pattern partially disposed on the second electrode and the third electrode and extending in a first direction; and a bridging member having a shape extending in a second direction and electrically connected to at least one of the first pattern portion and the second pattern portion and the first support pattern.

[0023] Each of the first support pattern and the bridging member may have a width greater than the width of the first pattern portion and the second pattern portion.

[0024] The first support pattern can be spaced apart from the second main part of the second connecting electrode and the third main part of the third connecting electrode.

[0025] The first patterned portion can make electrical contact with the main portion of the first connecting electrode and the main portion of the third connecting electrode, and the second patterned portion can make electrical contact with the main portion of the second connecting electrode and the main portion of the fourth connecting electrode.

[0026] Details of other embodiments are included in the detailed description and accompanying drawings.

[0027] Beneficial effects According to an embodiment, by selectively connecting electrodes only to light-emitting elements located at specific positions within the emission region of the display device, brightness differences can be reduced. In the display device, a specific area of ​​each sub-pixel can be defined as a light-emitting area based on the shape of the connecting electrodes, and a uniform number of light-emitting elements can be provided in the light-emitting area for each sub-pixel. Therefore, brightness differences between sub-pixels in the display device can be reduced.

[0028] The effects of the embodiments are not limited to those illustrated above, and many more effects are included in this disclosure. Attached Figure Description

[0029] Figure 1 This is a schematic plan view of a display device according to an embodiment.

[0030] Figure 2 This is a schematic plan view showing the pixels of a display device according to an embodiment.

[0031] Figure 3 It shows the setting Figure 2 A schematic plan view of the relative arrangement of the protrusion pattern, embankment, connecting electrodes, and light-emitting diodes in a single pixel.

[0032] Figure 4 It is along Figure 2 A schematic cross-sectional view taken from line Q1-Q1'.

[0033] Figure 5 It is along Figure 2 A schematic cross-sectional view taken from line Q2-Q2'.

[0034] Figure 6 yes Figure 2 A magnified view of part A1.

[0035] Figure 7 It is along Figure 2 A schematic cross-sectional view taken from line Q3-Q3'.

[0036] Figure 8 This is a schematic cross-sectional view showing a portion of a display device according to an embodiment in which a second light-emitting diode is provided.

[0037] Figure 9This is a view showing the light-emitting element according to an embodiment.

[0038] Figure 10 This is a schematic plan view illustrating sub-pixels of a display device according to an embodiment.

[0039] Figure 11 yes Figure 10 A magnified view of part A2.

[0040] Figure 12 It is along Figure 10 A schematic cross-sectional view taken from line Q4-Q4'.

[0041] Figure 13 It is along Figure 10 A schematic cross-sectional view taken from line Q5-Q5'.

[0042] Figure 14 This is a schematic plan view illustrating sub-pixels of a display device according to an embodiment.

[0043] Figure 15 It shows the setting Figure 14 A schematic plan view of the relative arrangement of protrusion patterns, embankments, connecting electrodes, and light-emitting diodes in a sub-pixel.

[0044] Figure 16 It is along Figure 14 A schematic cross-sectional view taken from line Q6-Q6'.

[0045] Figure 17 It is along Figure 14 A schematic cross-sectional view taken from line Q7-Q7'.

[0046] Figure 18 This is a schematic plan view illustrating sub-pixels of a display device according to an embodiment.

[0047] Figure 19 It shows the setting Figure 18 A schematic plan view of the relative arrangement of protrusion patterns, embankments, connecting electrodes, and light-emitting diodes in a sub-pixel.

[0048] Figure 20 This is a schematic plan view illustrating sub-pixels of a display device according to an embodiment.

[0049] Figure 21 It shows the setting Figure 20 A schematic plan view of the relative arrangement of the protrusion patterns, embankments, connecting electrodes, and the second insulating layer in the sub-pixel.

[0050] Figure 22 yes Figure 20 A magnified view of part of A3.

[0051] Figure 23 yes Figure 20 A magnified view of part of A4 paper.

[0052] Figure 24 It is along Figure 20 A schematic cross-sectional view taken from line Q8-Q8'.

[0053] Figure 25 This is a schematic cross-sectional view showing a portion of a display device according to an embodiment. Detailed Implementation

[0054] This disclosure will now be described more fully below with reference to the accompanying drawings, in which preferred embodiments of the disclosure are illustrated. However, this disclosure may be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art.

[0055] It will also be understood that when a layer is referred to as being "on" another layer or substrate, the layer may be directly on the other layer or substrate, or an intermediary layer may be present. Throughout the specification, the same reference numerals denote the same components.

[0056] It will be understood that although the terms “first,” “second,” etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the teachings of this disclosure, the first element discussed below may be referred to as the second element. Similarly, the second element may also be referred to as the first element.

[0057] In the following description, embodiments will be illustrated with reference to the accompanying drawings.

[0058] Figure 1 This is a schematic plan view of a display device according to an embodiment.

[0059] Reference Figure 1 The display device 10 displays moving or still images. The display device 10 can refer to any electronic device that provides a display screen. For example, within the spirit and scope of the disclosure, the display device 10 may include a television set, laptop computer, monitor, electronic billboard, Internet of Things device, mobile phone, smartphone, tablet PC, electronic watch, smartwatch, watch phone, head-mounted display device, mobile communication terminal, electronic notebook, e-book reader, portable multimedia player (PMP), navigation device, game console, digital camera, camcorder, etc.

[0060] Display device 10 may include a display panel for providing a display screen. Within the spirit and scope of this disclosure, examples of the display panel may include inorganic light-emitting diode (LED) display panels, organic light-emitting diode (OLED) display panels, quantum dot (QD) light-emitting diode (OLED) display panels, plasma display panels, field emission display panels, etc. In the following description, an inorganic LED display panel is used as an example of the display panel (or display device) 10, but the disclosure is not limited thereto. Any other display panel may be used within the scope of this disclosure.

[0061] The shape of the display device 10 can be modified in various ways. For example, within the spirit and scope of the disclosure, the display device 10 can have shapes such as a substantially rectangular shape with a longer horizontal side, a substantially rectangular shape with a longer vertical side, a substantially square shape, a substantially quadrilateral shape with substantially rounded corners (vertices), other polygonal shapes, a substantially circular shape, etc. The shape of the display area DPA of the display device 10 can also be similar to the overall shape of the display device 10. Figure 1 In the example shown, the display device 10 has a substantially rectangular shape with a longer side in the second direction DR2.

[0062] Display device 10 may include a display area DPA and a non-display area NDA. Images may be displayed in the display area DPA. No images are displayed in the non-display area NDA. The display area DPA may be referred to as the active area, and the non-display area NDA may be referred to as the inactive area. The display area DPA typically occupies a large portion of the center of the display device 10.

[0063] The display area (DPA) can include pixels (PX). Pixels (PX) can be arranged or set in a matrix. When viewed from above, the shape of each pixel (PX) can be, but is not limited to, substantially rectangular or square. Each pixel can be substantially rhomboid in shape with sides tilted relative to one direction. Pixels (PX) can be arranged in strips or pen tiles. ® Pattern arrangement or setup. Each pixel PX may include at least one light-emitting element that emits light in a band to achieve a given color.

[0064] A non-display area NDA can be disposed around the display area DPA. The non-display area NDA can completely or partially surround the display area DPA, or completely or partially be adjacent to the display area DPA. The display area DPA can have a substantially rectangular shape, and the non-display area NDA can be positioned adjacent to the four sides of the display area DPA. The non-display area NDA can form the frame of the display device 10. Line or circuit drivers included in the display device 10 can be disposed in each of the non-display areas NDA, or external devices can be mounted or disposed thereon.

[0065] Figure 2This is a schematic plan view showing the pixels of a display device according to an embodiment. Figure 2 A portion of pixel PX and another pixel PX adjacent to it in the first direction DR1 are shown.

[0066] Reference Figure 2 Each of the pixels PX in the display device 10 may include a sub-pixel SPXn, where n is an integer from 1 to 3. For example, a pixel PX may include a first sub-pixel SPX1, a second sub-pixel SPX2, and a third sub-pixel SPX3. The first sub-pixel SPX1 may emit light of a first color, the second sub-pixel SPX2 may emit light of a second color, and the third sub-pixel SPX3 may emit light of a third color. For example, the first color may be blue, the second color may be green, and the third color may be red. However, it will be understood that the disclosure is not limited thereto. All sub-pixels SPXn may emit light of the same color. According to an embodiment, sub-pixels SPXn may emit blue light. Although in Figure 2 In the example shown, a single pixel PX may include three sub-pixels SPXn, but the disclosure is not limited thereto. A pixel PX may include more than three sub-pixels SPXn.

[0067] Each of the sub-pixels SPXn in the display device 10 may include an emitting region EMA and a non-emitting region. In the emitting region EMA, a light-emitting diode ED is configured to emit light of a certain wavelength. In the non-emitting region, no light-emitting diode ED is provided, and light emitted from the light-emitting diode ED does not reach it, so no light is emitted from it.

[0068] The emission region EMA may include a region in which a light-emitting diode ED is disposed, and may include a region adjacent to the light-emitting diode ED from which light emitted from the light-emitting element ED exits. However, it will be understood that the disclosure is not limited thereto. The emission region EMA may also include a region in which light emitted from the light-emitting diode ED is reflected or refracted by other elements before exiting. The light-emitting diode ED may be disposed in each of the sub-pixels SPXn, and the emission region EMA may include the region in which the light-emitting element ED is disposed and the adjacent region.

[0069] Although the emission region EMA of the sub-pixel SPXn has a uniform area in the example shown in the accompanying drawings, the disclosure is not limited thereto. In embodiments, the emission region EMA of the sub-pixel SPXn may have different areas depending on the color or wavelength of the light emitted from the light-emitting diode ED disposed in the respective sub-pixel SPXn.

[0070] Each of the sub-pixels SPXn may further include a sub-region SA disposed in a non-emitting region. The sub-region SA may be disposed below the emitting region EMA in the first direction DR1, and may be disposed between the emitting regions EMA of adjacent sub-pixels SPXn along the first direction DR1. For example, the emitting regions EMA and sub-region SA may be repeatedly arranged or disposed in the second direction DR2, and may be alternately arranged or disposed in the first direction DR1. However, it will be understood that the disclosure is not limited thereto. The emitting regions EMA and sub-region SA of pixel PX may have the same characteristics as... Figure 2 The arrangement is different. No light-emitting diodes (EDs) are located in sub-region SA, therefore no light is emitted from them. Electrodes (RMEs) located in sub-pixels SPXn can be partially located in sub-region SA. Electrodes (RMEs) located in different sub-pixels SPXn can be separated from each other at the separation region ROP of sub-region SA.

[0071] A dam BNL is positioned between the emitting region EMA and the sub-region SA. When viewed from above, the dam BNL can be arranged in a grid pattern on the front surface of the display area DPA, including portions extending in the first direction DR1 and the second direction DR2. The dam BNL can be positioned along the boundary of each of the sub-pixels SPXn to distinguish adjacent sub-pixels SPXn. The dam BNL can be configured to surround the emitting regions EMA positioned in each of the sub-pixels SPXn to distinguish them from each other. The distances between emitting regions EMA, between sub-region SA, and between emitting regions EMA and sub-region SA can vary depending on the width of the dam BNL.

[0072] Figure 3 It shows the setting Figure 2 A schematic plan view of the relative arrangement of the protrusion pattern, embankment, connecting electrodes, and light-emitting diodes in a single pixel. Figure 4 It is along Figure 2 A schematic cross-sectional view taken from line Q1-Q1'. Figure 5 It is along Figure 2 A schematic cross-sectional view taken from line Q2-Q2'. Figure 6 yes Figure 2 An enlarged view of section A1. Figure 7 It is along Figure 2 A schematic cross-sectional view taken from line Q3-Q3'.

[0073] Figure 3 Only some or more of the layers set in a single pixel PX are depicted. Figure 4 A cross-section is shown passing through the two ends of a first-type light-emitting diode ED#1 located in the light-emitting region ELA of the first sub-pixel SPX1. Figure 5It is a view showing a cross-section of the contacts CT1 and CT2 located or set in the sub-region SA of the first sub-pixel SPX1. Figure 6 It is partly based on Figure 2 The image shows an enlarged view of the luminous region ELA and the first non-luminous region NEA1 of the first sub-pixel SPX1. Figure 7 A cross-section is shown passing through the second type of light-emitting diode ED#2 at both ends of the first non-light-emitting region NEA1 of the first sub-pixel SPX1.

[0074] Combination Figure 2 Reference Figures 3 to 5 The display device 10 may include a first substrate SUB, a semiconductor layer, a conductive layer, and an insulating layer disposed on the first substrate SUB. The semiconductor layer, conductive layer, and insulating layer may form the circuit layer CCL and the display element layer of the display device 10.

[0075] For example, the first substrate SUB can be an insulating substrate. The first substrate SUB can be made of insulating materials such as glass, quartz, and polymer resin. The first substrate SUB can be a rigid substrate or a flexible substrate that can be bent, folded, or rolled up.

[0076] A first conductive layer may be disposed on a first substrate SUB. The first conductive layer may include a bottom metal layer BML. The bottom metal layer BML is configured to be stacked with the active layer ACT1 of the first transistor T1. The bottom metal layer BML may include a light-blocking material, and thus can prevent light from entering the active layer ACT1 of the first transistor T1. However, it will be noted that the bottom metal layer BML may be removed.

[0077] A buffer layer BL can be disposed on the bottom metal layer BML and the first substrate SUB. The buffer layer BL can be formed on the first substrate SUB to protect the transistors of the pixel PX from moisture that penetrates through the moisture-sensitive first substrate SUB, and can also provide a flat surface.

[0078] A semiconductor layer is disposed on the buffer layer BL. The semiconductor layer may include the active layer ACT1 of the first transistor T1. The active layer ACT1 may be configured to partially overlap with the gate electrode G1 of the second conductive layer, which will be described below.

[0079] Within the spirit and scope of the disclosure, the semiconductor layer may include monocrystalline silicon, oxide semiconductors, etc. In other embodiments, the semiconductor layer may include polycrystalline silicon. The oxide semiconductor may be an oxide semiconductor including indium (In). For example, within the spirit and scope of the disclosure, the oxide semiconductor may be at least one of indium tin oxide (ITO), indium zinc oxide (IZO), indium gallium oxide (IGO), indium zinc tin oxide (IZTO), indium gallium tin oxide (IGTO), indium gallium zinc oxide (IGZO), indium gallium zinc tin oxide (IGZTO), etc.

[0080] Although only one first transistor T1 is shown in the accompanying drawings in the sub-pixel SPXn of the display device 10, the disclosure is not limited thereto. Furthermore, a greater number of transistors may be included in the display device 10.

[0081] A first gate insulating layer GI is disposed on the semiconductor layer and the buffer layer BL. The first gate insulating layer GI can be used as the gate insulating film of the first transistor T1.

[0082] A second conductive layer is disposed on the first gate insulating layer GI. The second conductive layer may include the gate electrode G1 of the first transistor T1. The gate electrode G1 may be configured such that it is superimposed on the channel region of the active layer ACT1 in the thickness direction (e.g., the third direction DR3).

[0083] The first interlayer dielectric layer IL1 is disposed on the second conductive layer. The first interlayer dielectric layer IL1 can serve as an insulating film between the second conductive layer and other layers disposed thereon, and can also protect the second conductive layer.

[0084] A third conductive layer is disposed on the first interlayer dielectric layer IL1. The third conductive layer may include a first voltage line VL1, a second voltage line VL2, and conductive patterns CDP1 and CDP2.

[0085] A high-level voltage (or a first power supply voltage) can be applied to the first voltage line VL1 to transmit power to the first electrode RME1, and a low-level voltage (or a second power supply voltage) can be applied to the second voltage line VL2 to transmit power to the second electrode RME2. A portion of the first voltage line VL1 can contact the active layer ACT1 of the first transistor T1 through a contact hole penetrating the first interlayer dielectric layer IL1 and the first gate insulating layer GI. The first voltage line VL1 can serve as the first drain electrode D1 of the first transistor T1. The second voltage line VL2 can be connected to or directly connected to the second electrode RME2, which will be described below.

[0086] The first conductive pattern CDP1 can contact the active layer ACT1 of the first transistor T1 through a contact hole penetrating the first interlayer dielectric layer IL1 and the first gate insulating layer GI. The first conductive pattern CDP1 can also contact the bottom metal layer BML through another contact hole. The first conductive pattern CDP1 can be used as the first source electrode S1 of the first transistor T1.

[0087] The second conductive pattern CDP2 can be connected to the first electrode RME1, which will be described below. The second conductive pattern CDP2 can be electrically connected to the first transistor T1 via the first conductive pattern CDP1. Although the first conductive pattern CDP1 and the second conductive pattern CDP2 are spaced apart from each other in the figures, in some embodiments, the second conductive pattern CDP2 can be integrated with the first conductive pattern CDP1 to form a single pattern. The first transistor T1 can transmit a first power supply voltage applied from the first voltage line VL1 to the first electrode RME1.

[0088] Although the first conductive pattern CDP1 and the second conductive pattern CDP2 may be formed or disposed on the same layer in the accompanying drawings, the disclosure is not limited thereto. In embodiments, the second conductive pattern CDP2 may be formed as a conductive layer different from the first conductive pattern CDP1 (e.g., a fourth conductive layer disposed above a third conductive layer, with some insulating layers between the third and fourth conductive layers). In this case, the first voltage line VL1 and the second voltage line VL2 may also be formed as a fourth conductive layer instead of a third conductive layer. The first voltage line VL1 can be electrically connected to the drain electrode D1 of transistor T1 through different conductive patterns.

[0089] The buffer layer BL, the first gate insulating layer GI, and the first interlayer dielectric layer IL1 can be composed of multiple inorganic layers stacked alternately on top of each other. For example, the buffer layer BL, the first gate insulating layer GI, and the first interlayer dielectric layer IL1 can be composed of silicon oxide (SiO2). x Silicon nitride (SiN) x ) and silicon oxynitride (SiO) x N y At least one of the inorganic layers can be a double layer stacked on top of each other or made of silicon oxide (SiO2). x Silicon nitride (SiN) x ) and silicon oxynitride (SiO) x N y At least one of the inorganic layers in the above-described structures can be stacked alternately in a multilayer configuration. However, it will be understood that the disclosure is not limited thereto. The buffer layer BL, the first gate insulating layer GI, and the first interlayer dielectric layer IL1 can be composed of a single inorganic layer comprising the aforementioned insulating materials. In an embodiment, the first interlayer dielectric layer IL1 can be made of an organic insulating material such as polyimide (PI).

[0090] The second and third conductive layers may consist of a single layer or multiple layers of one or an alloy of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu). However, it will be understood that the disclosure is not limited thereto.

[0091] The via layer (VIA) is disposed on the third conductive layer. The via layer (VIA) may include an organic insulating material (e.g., an organic insulating layer material such as polyimide (PI)) to provide a flat surface.

[0092] Electrodes RME (RME1 and RME2), raised patterns BN (BN1 and BN2), dam BNL, light-emitting diodes ED, and connecting electrodes CNE (CNE1 and CNE2) are disposed on the via layer VIA as the display element layer. Passivation layers PAS1 and PAS2 can be disposed on the via layer VIA.

[0093] The protruding pattern BN can be disposed on or directly disposed on the via layer VIA. The protruding pattern BN can be disposed in the emission region EMA of the sub-pixel SPXn, and can have a shape extending in the first direction DR1 and can be spaced apart from each other in the second direction DR2. For example, the protruding pattern BN can include a first protruding pattern BN1 disposed on one side (e.g., the left side) of the center of the emission region EMA and a second protruding pattern BN2 disposed on the opposite side or the other side (e.g., the right side) of the center of the emission region EMA.

[0094] The raised patterns BN can have the same width, but the disclosure is not limited thereto. Some raised patterns BN1 and BN2 can have a different width than the other raised patterns. Each of the raised patterns BN can have a length extending in a first direction DR1, which is greater than the length of the emitting region EMA surrounded by the dam BNL in the first direction DR1. The portion of the dam BNL extending in the second direction DR2 can overlap with the raised pattern BN. The raised patterns BN can form island patterns on the front surface of the display area DPA, the island patterns having a small width and extending in one direction or one direction in the emitting region EMA of each of the sub-pixels SPXn. Light-emitting diodes ED can be disposed between the raised patterns BN1 and BN2 spaced apart from each other.

[0095] The raised pattern BN may have a structure that at least partially protrudes from the upper surface of the via layer VIA. Each raised portion of the raised pattern BN may have an inclined or curved side surface. Unlike that shown in the figures, the raised pattern BN may, in a schematic cross-sectional view, be a substantially semi-circular or semi-elliptical shape with a substantially curved outer surface. The raised pattern BN may include, but is not limited to, organic insulating materials such as polyimide (PI).

[0096] Electrode RME has a shape extending in one direction and is disposed in each of the sub-pixels SPXn. Electrode RME may extend in a first direction DR1 to span the emission region EMA and sub-region SA of the sub-pixel SPXn, and they may be spaced apart from each other in a second direction DR2. The display device 10 may include a first electrode RME1 and a second electrode RME2 disposed in each of the sub-pixels SPXn. The first electrode RME1 is disposed to the left of the center of the emission region EMA, and the second electrode RME2 is spaced apart from the first electrode RME1 in the second direction DR2 and disposed to the right of the emission region EMA.

[0097] A portion of the first electrode RME1 may be disposed on the first protrusion pattern BN1, and a portion of the second electrode RME2 may be disposed on the second protrusion pattern BN2. The electrodes RMEs may be disposed at least on the inclined side surfaces of the protrusion patterns BN1 and BN2, respectively. According to an embodiment, the width of the electrode RME measured in the second direction DR2 may be smaller than the width of the protrusion patterns BN1 and BN2 measured in the second direction DR2. Each of the electrode RMEs may be configured to cover at least one side surface (or at least one side surface) of the corresponding protrusion pattern BN or to overlap with at least one side surface (or at least one side surface) of the corresponding protrusion pattern BN to reflect light emitted from the light-emitting diode ED. The distance between the electrode RMEs spaced apart from each other in the second direction DR2 may be smaller than the distance between protrusion patterns BN1 and BN2. At least a portion of each of the electrode RMEs may be disposed on or directly disposed on the via layer VIA, such that they can be disposed on the same plane and therefore may be coplanar.

[0098] The first electrode RME1 and the second electrode RME2 can be connected to the third conductive layer through a first contact hole CTD and a second contact hole CTS, respectively, at a location where the first electrode RME1 and the second electrode RME2 are superimposed on the dam BNL. The first electrode RME1 can contact the second conductive pattern CDP2 through the first contact hole CTD that penetrates the underlying via layer VIA. The second electrode RME2 can contact the second voltage line VL2 through the second contact hole CTS that penetrates the underlying via layer VIA. The first electrode RME1 can be electrically connected to the first transistor T1 through the second conductive pattern CDP2 and the first conductive pattern CDP1 to receive a first power supply voltage. The second electrode RME2 can be electrically connected to the second voltage line VL2 to receive a second power supply voltage. Although the first contact hole CTD and the second contact hole CTS are formed below or beneath the dam BNL in the figures, the disclosure is not limited thereto. The contact hole CTD and CTS can be disposed in the emitter region EMA or the sub-region SA.

[0099] Electrodes RME disposed in adjacent sub-pixels SPXn along the first direction DR1 can be spaced apart from each other at the separation region ROP in the sub-region SA. This arrangement of electrodes RME can be formed by forming a single electrode line extending along the first direction DR1 and placing a light-emitting diode ED thereon, and dividing the electrode line into multiple portions during subsequent processes. The electrode line can be used to generate an electric field in the sub-pixels SPXn during the manufacturing process of the display device 10 to align the light-emitting diode ED.

[0100] After aligning the light-emitting diode (ED), the electrode lines are separated at the separation region ROP, allowing the formation of electrodes RME spaced apart from each other in the first direction DR1. The electrode line separation process can be performed after the process for forming the second passivation layer PAS2, which will be described below, and the second passivation layer PAS2 may not be present at the separation region ROP. The second passivation layer PAS2 can be used as a mask pattern in the electrode line separation process.

[0101] Electrode RME can be electrically connected to some of the light-emitting diodes (EDs). Electrode RME can be connected to the light-emitting diodes (EDs) via connection electrodes CNE (CNE1 and CNE2), which will be described below, and can transmit electrical signals applied from the conductive layer beneath it to the light-emitting diodes (EDs).

[0102] Each of the electrode RMEs may include a conductive material with high reflectivity. For example, within the spirit and scope of the disclosure, the electrode RME may include metals such as silver (Ag), copper (Cu), and aluminum (Al) as materials with high reflectivity, and may be alloys including aluminum (Al), nickel (Ni), lanthanum (La), etc. The electrode RME may reflect light emitted from the light-emitting diode ED and traveling toward the side surface of the protrusion pattern BN toward the top side of each of the sub-pixels SPXn.

[0103] However, it will be understood that the disclosure is not limited thereto. The electrode RME may also include a transparent conductive material. For example, each of the electrode RMEs may include materials such as ITO, IZO, and ITZO. In embodiments, each of the electrodes RME1 and RME2 may have a structure in which one or more layers of the transparent conductive material and one or more metal layers with high reflectivity can be stacked on top of each other, or may be composed of a single layer of the aforementioned materials. For example, each of the electrode RMEs may have a stacked structure such as ITO / Ag / ITO, ITO / Ag / IZO, or ITO / Ag / ITZO / IZO.

[0104] The first passivation layer PAS1 is disposed on the via layer VIA, the raised pattern BN, and the electrode RME. The first passivation layer PAS1 can be disposed on the via layer VIA to cover the electrode RME and the raised pattern BN, or stacked with the electrode RME and the raised pattern BN. The first passivation layer PAS1 may not be disposed at the separation region ROP in the sub-region SA, where adjacent electrodes RME in the first direction DR1 are spaced apart. The first passivation layer PAS1 can protect the electrode RME and insulate different electrodes RME from each other. The first passivation layer PAS1 also prevents the light-emitting diode ED disposed thereon from contacting and being damaged by the electrode RME.

[0105] In one embodiment, the first passivation layer PAS1 may have a step, such that a portion of the upper surface is recessed between electrodes RME spaced apart along the second direction DR2. A light-emitting diode (ED) may be disposed at the step on the upper surface of the first passivation layer PAS1, and a space may be formed between the ED and the first passivation layer PAS1.

[0106] The first passivation layer PAS1 may include contacts CT1 and CT2 that expose a portion of the upper surface of each of the electrodes RME. Contacts CT1 and CT2 may penetrate the first passivation layer PAS1, and the connection electrode CNE, described below, may contact the electrodes RME exposed through contacts CT1 and CT2.

[0107] The dam BNL can be disposed on the first passivation layer PAS1. When viewed from above, the dam BNL can be disposed in a grid pattern including portions extending in the first direction DR1 and the second direction DR2, and can be disposed at the boundaries of sub-pixels SPXn to distinguish adjacent sub-pixels SPXn from each other. The dam BNL can be disposed around the emission region EMA and the sub-region SA, and the regions defined and opened by the dam BNL can be the emission region EMA and the sub-region SA, respectively.

[0108] The dam BNL can have a height, and in embodiments, the height of the upper surface of the dam BNL can be greater than the height of the raised pattern BN, and the thickness of the dam BNL can be equal to or greater than the thickness of the raised pattern BN. In the inkjet printing process of manufacturing the display device 10, the dam BNL can prevent ink from overflowing into adjacent sub-pixels SPXn. The dam BNL can separate different sub-pixels SPXn from each other, preventing the ink dispersed in different light-emitting diodes ED from mixing. Similar to the raised pattern BN, the dam BNL can include, but is not limited to, polyimide.

[0109] A light-emitting diode (ED) can be disposed on a first passivation layer PAS1. The ED may include multiple layers disposed on the upper surface of the first substrate SUB in a direction parallel to the upper surface of the first substrate SUB. The EDs of the display device 10 may be arranged or configured such that they extend parallel to the first substrate SUB. Multiple semiconductor layers included in the ED may be sequentially disposed in a direction parallel to the upper surface of the first substrate SUB. However, it will be understood that the disclosure is not limited thereto. In some embodiments, where the ED has a different structure, the multiple semiconductor layers may be disposed in a direction perpendicular to the first substrate SUB.

[0110] Light-emitting diodes (LEDs) can be disposed on electrodes RMEs spaced apart from each other along a second direction DR2, between different protrusion patterns BN1 and BN2. The LEDs can be spaced apart from each other along a first direction DR1 where the electrodes RMEs extend, and can be aligned substantially parallel to each other. The LEDs can have a shape extending in one direction and can have a length greater than the shortest distance between the electrodes RMEs spaced apart along the second direction DR2. At least one end (or at least one end) of each LED can be disposed on one of the different electrodes RMEs, or both ends can be disposed on different electrodes RMEs respectively. The direction in which the electrodes RMEs extend can be substantially perpendicular to the direction in which the LEDs extend. However, it will be understood that the disclosure is not limited thereto. The LEDs can be oriented obliquely relative to the direction in which the electrodes RMEs extend.

[0111] Each of the light-emitting diodes (LEDs) disposed in each of the sub-pixels SPXn may include a semiconductor layer and may emit light of different wavelengths depending on the material of the semiconductor layer. However, it will be understood that the disclosure is not limited thereto. Each of the LEDs disposed in the sub-pixels SPXn may include a semiconductor layer made of the same or similar material and may emit light of the same color. The LEDs may include semiconductor layers doped with impurities of different conductivity types and may be aligned such that their ends point in orientation according to the electric field generated above the electrode RME. A first end and a second end as opposite ends may be defined relative to one of the semiconductor layers. For example, the portion of the LED disposed on the first electrode RME1 may be the first end, and the portion of the LED disposed on the second electrode RME2 may be the second end. In embodiments where the display device 10 may include a larger number of electrodes RME, the LEDs disposed on different electrodes RME may have first ends pointing in different orientations.

[0112] Some of the light-emitting diodes (EDs) can contact the connection electrodes CNE (CNE1 and CNE2), enabling them to be electrically connected. Since a portion of the semiconductor layer of each ED is exposed at its end surface on one side of its extending direction, the exposed portion of the semiconductor layer can contact the connection electrode CNE. Each ED can be electrically connected via the connection electrode CNE to the electrode RME and the conductive layer below or beneath the via layer VIA, and an electrical signal can be applied to it, allowing it to emit light within a given or selected wavelength range.

[0113] A second passivation layer PAS2 can be disposed on the light-emitting diode ED. The second passivation layer PAS2 can extend in the first direction DR1 and can partially surround the outer surface of the light-emitting diode ED between the first protrusion pattern BN1 and the second protrusion pattern BN2, without covering the sides or ends of the light-emitting diode ED or overlapping with the sides or ends of the light-emitting diode ED. When viewed from above, the second passivation layer PAS2 can form a linear pattern or an island pattern in each sub-pixel SPXn. The second passivation layer PAS2 can protect and fix the light-emitting diode ED during the manufacturing process of the display device 10. The second passivation layer PAS2 can be configured to fill the space between the light-emitting diode ED and the first passivation layer PAS1 below it.

[0114] As will be described later, the second passivation layer PAS2 may also be partially disposed on the protrusion patterns BN1 and BN2, the embankment BNL, and the sub-region SA. The second passivation layer PAS2 may include portions covering or superimposed on the light-emitting diode ED, as well as portions connected to and disposed on the protrusion patterns BN1 and BN2, the embankment BNL, and the sub-region SA. A more detailed description thereof will be given with reference to embodiments.

[0115] Connecting electrodes CNE1 and CNE2 can be disposed on the electrode RME and the light-emitting diode ED. The connecting electrodes CNEs can be partially disposed on the side surface of the patterned portion of the second passivation layer PAS2, and can be spaced apart from other connecting electrodes CNEs in the second direction DR2, with the patterned portion between the connecting electrodes CNEs and the other connecting electrodes CNEs. The portion of the connecting electrodes CNE disposed on the side surface of the patterned portion of the second passivation layer PAS2 can be lower than the patterned portion, therefore the connecting electrodes CNEs may not be disposed on the top of the second passivation layer PAS2. According to an embodiment, the connecting electrodes CNEs may not be stacked with the second passivation layer PAS2 in the thickness direction. By performing a process to remove the material disposed on the second passivation layer PAS2 of the connecting electrodes, the first connecting electrode CNE1 and the second connecting electrode CNE2, spaced apart from each other, can be formed. The connecting electrodes CNEs may not be disposed on the second passivation layer PAS2.

[0116] The connecting electrode CNE can contact the light-emitting diode ED and the electrode RME. The connecting electrode CNE can directly contact the semiconductor layer exposed at both end surfaces of the light-emitting diode ED, and can also contact at least one of the electrodes RME via contacts CT1 and CT2 penetrating the first passivation layer PAS1. The two ends of the light-emitting diode ED can be electrically connected to the electrode RME via connecting electrodes CNE1 and CNE2. It should be noted that the semiconductor layer does not necessarily need to be located on both sides of the light-emitting diode ED. An electrode layer, instead of a semiconductor layer, can be located on at least one side of the light-emitting diode ED. The electrode layer of the light-emitting diode ED can be connected to the connecting electrodes CNE1 and CNE2.

[0117] The first connecting electrode CNE1 may have a shape extending in the first direction DR1 and may be disposed on the first electrode RME1. A portion of the first connecting electrode CNE1 disposed on the first protrusion pattern BN1 may overlap with the first electrode RME1 and may extend from the first electrode RME1 beyond the embankment BNL in the first direction DR1 to the sub-region SA. The first connecting electrode CNE1 may include an extension portion having a large width in the second direction DR2 within the sub-region SA, and the extension portion may contact the first electrode RME1 via a first contact CT1 exposing the upper surface of the first electrode RME1. The first connecting electrode CNE1 may contact the first end of the light-emitting diode ED and the first electrode RME1 to transmit an electrical signal applied from the first transistor T1 to the light-emitting diode ED.

[0118] The second connecting electrode CNE2 may have a shape extending in the first direction DR1 and may be disposed on the second electrode RME2. The portion of the second connecting electrode CNE2 disposed on the second protrusion pattern BN2 may overlap with the second electrode RME2 and may extend from the second electrode RME2 beyond the embankment BNL in the first direction DR1 to the sub-region SA. The second connecting electrode CNE2 may include an extension portion having a large width in the second direction DR2 within the sub-region SA, and the extension portion may contact the second electrode RME2 via a second contact CT2 exposing the upper surface of the second electrode RME2. The second connecting electrode CNE2 may contact the second end of the light-emitting diode ED and the second electrode RME2 to transmit an electrical signal applied from the second voltage line VL2 to the light-emitting diode ED.

[0119] When viewed from above, the first connecting electrode CNE1 and the second connecting electrode CNE2 may be spaced apart from each other in the second direction DR2. The first connecting electrode CNE1 and the second connecting electrode CNE2 may be configured such that they do not contact each other, and an electrical signal applied to each of the connecting electrodes CNE2 may flow through the light-emitting diode ED. It will be noted that the first connecting electrode CNE1 and the second connecting electrode CNE2 may be disposed in substantially the same layer (or the same layer). However, it will be understood that the disclosure is not limited thereto. In embodiments, the first connecting electrode CNE1 and the second connecting electrode CNE2 may be disposed in different layers, and another insulating layer may be further disposed between them.

[0120] According to an embodiment, the connecting electrode CNE may include main portions CMP1 and CMP2, and sub-portions CSP1 and CSP2, having different widths measured in the second direction DR2. The first connecting electrode CNE1 may include a first main portion CMP1 and a first sub-portion CSP1 connected to the first main portion CMP1 and having a width smaller than that of the first main portion CMP1. The second connecting electrode CNE2 may include a second main portion CMP2 and a second sub-portion CSP2 connected to the second main portion CMP2 and having a width smaller than that of the second main portion CMP2. The portion of the first connecting electrode CNE1 disposed in the emission region EMA and having a larger width is the first main portion CMP1. The first sub-portions CSP1 may be respectively connected to both sides of the first main portion CMP1 in the first direction DR1. The portion of the second connecting electrode CNE2 disposed in the emission region EMA and having a larger width is the second main portion CMP2. The second sub-portions CSP2 may be respectively connected to both sides of the second main portion CMP2 in the first direction DR1. In each of the sub-parts CSP1 and CSP2 of the connecting electrode CNE, the sub-parts CSP1 and CSP2 connected to the upper side of the main parts CMP1 and CMP2 respectively can be provided in the emission region EMA, and the sub-parts CSP1 and CSP2 connected to the lower side of the main parts CMP1 and CMP2 respectively can extend in the first direction DR1 to cross the embankment BNL and be provided in the sub-region SA.

[0121] The first main part CMP1 and the second main part CMP2 can be spaced apart from each other and face each other in the second direction DR2. The first sub-part CSP1 and the second sub-part CSP2 can also be spaced apart from each other and face each other in the second direction DR2. The sides of the first main part CMP1 and the second main part CMP2 opposite to their facing sides can be aligned with the sides of the first sub-part CSP1 and the second sub-part CSP2, respectively. Since the first main part CMP1 and the second main part CMP2 have a larger width than the first sub-part CSP1 and the second sub-part CSP2, the distance between the first main part CMP1 and the second main part CMP2 can be different from the distance between the first sub-part CSP1 and the second sub-part CSP2.

[0122] According to an embodiment, the distance W1 between the main portions CMP1 and CMP2 of the connecting electrodes CNE in the second direction DR2 can be smaller than the distance W2 between the sub-portions CSP1 and CSP2 in the second direction DR2. The first connecting electrode CNE1 and the second connecting electrode CNE2 can be spaced apart from each other in the second direction DR2. The second passivation layer PAS2 is disposed between the first connecting electrode CNE1 and the second connecting electrode CNE2, and the first main portion CMP1 and the second main portion CMP2 can respectively contact the side surface of the second passivation layer PAS2. The first distance W1 between the first main portion CMP1 and the second main portion CMP2 can be equal to the width of the pattern portion of the second passivation layer PAS2 disposed on the light-emitting diode ED.

[0123] The connecting electrodes CNEs, spaced apart from each other and facing each other in the second direction DR2, can be arranged or configured such that they are equidistant from each other relative to an imaginary line extending in the first direction DR1. For example, each of the connecting electrodes CNEs and electrodes RMEs can be equidistant from each other relative to the same imaginary line. For example, the first electrode RME1 and the second electrode RME2 can be equidistant from each other in the second direction DR2 relative to an imaginary line extending in the first direction DR1, and the first connecting electrode CNE1 and the second connecting electrode CNE2 can be equidistant from each other in the second direction DR2 relative to the imaginary line. It will be noted that the distance between the electrode RME and the imaginary line can be different from the distance between the connecting electrode CNE and the imaginary line. The distance W3 between the first electrode RME1 and the second electrode RME2 can be larger than the first distance W1 between the first connecting electrode CNE1 and the second connecting electrode CNE2. The third distance W3 between electrodes RME1 and RME2 can be constant within the light-emitting region ELA, while the distance between connecting electrodes CNE1 and CNE2 can vary between a first distance W1 and a second distance W2 within the light-emitting region ELA. The light-emitting diode ED can be configured such that its two ends are respectively placed on the first electrode RME1 and the second electrode RME2. The light-emitting diode ED can be arranged or positioned along the different electrodes RMEs in a first direction DR1 via imaginary lines equidistant from each other. The relative arrangement of the electrodes RMEs, the light-emitting diode ED, and the connecting electrode CNE can be determined based on the distance from the imaginary lines, the width of the element, or its length.

[0124] According to an embodiment, the length LD of the light-emitting diode ED in one direction can be greater than the third distance W3 between the first electrode RME1 and the second electrode RME2. In an embodiment, ink in which the light-emitting diodes ED are dispersed can be sprayed into the emitting region EMA. Because the orientation and position of the light-emitting diode ED are changed by the force of the electric field generated above the electrodes RME, the light-emitting diode ED can be aligned on the electrodes RME. Since the light-emitting diode ED has a length LD greater than the third distance W3 between the electrodes RME, most light-emitting diode EDs can have two ends respectively disposed on the first electrode RME1 and the second electrode RME2.

[0125] The patterned portion of the second passivation layer PAS2 disposed on the light-emitting diode ED can also extend along an imaginary line in the first direction DR1. According to an embodiment, the width of the patterned portion of the second passivation layer PAS2, measured in the second direction DR2, can be smaller than the length LD of the light-emitting diode ED. The second passivation layer PAS2 can be configured not to cover the two ends of the light-emitting diode ED or not to overlap with the two ends of the light-emitting diode ED.

[0126] Depending on the distances or distances W1 and W2 from the imaginary lines, the connecting electrode CNE disposed on the electrode RME may or may not contact the two ends of the light-emitting diode ED. According to an embodiment, the first distance W1 between the main portions CMP1 and CMP2 of the connecting electrode CNE may be smaller than the length LD of the light-emitting diode ED in the second direction DR2. The second distance W2 between the sub-portions CSP1 and CSP2 may be larger than the length LD of the light-emitting diode ED. The light-emitting diode ED can be classified into a first type of light-emitting diode ED#1 and a second type of light-emitting diode ED#2. The first type of light-emitting diode ED#1 has two ends that contact the main portions CMP1 and CMP2 of the connecting electrode CNE, and the second type of light-emitting diode ED#2 has at least one end (or at least one end) that does not contact the connecting electrode CNE but is spaced apart from the sub-portions CSP1 and CSP2.

[0127] A first end of a first-type LED ED#1 can contact a first main portion CMP1 of a first connecting electrode CNE1, and a second end of the first-type LED ED#1 can contact a second main portion CMP2 of a second connecting electrode CNE2. The main portions CMP1 and CMP2 can have a width greater than the widths of the sub-portions CSP1 and CSP2, and a first distance W1 between the main portions CMP1 and CMP2 can be smaller than the length LD of the LED ED. As a result, since the distance between the main portions CMP1 and CMP2 is smaller than the length LD of the LED ED, the main portions CMP1 and CMP2 can contact the LED ED. Since the first-type LED ED#1 can have two ends respectively contacting the connecting electrode CNE, an electrical signal flowing to the electrode RME can be applied to the first-type LED ED#1, allowing light to be emitted through the electrical signal (hereinafter referred to as the connected LED).

[0128] On the other hand, the second distance W2 between sub-parts CSP1 and CSP2 can be larger than the length LD of the light-emitting diode ED. Unlike the first type light-emitting diode ED#1, the second type light-emitting diode ED#2, having two ends spaced apart from the first sub-part CSP1 and the second sub-part CSP2 respectively, will not contact the connection electrode CNE. The second type light-emitting diode ED#2 can be an unconnected light-emitting diode to which the electrical signal flowing to the electrode RME is not applied. The first type light-emitting diode ED#1 can be disposed between the second type light-emitting diodes ED#2.

[0129] As described above, ink in which light-emitting diodes (LEDs) are dispersed can be sprayed into an emission region EMA surrounded by a dam BNL, and can be aligned by an electric field generated above the electrode RME. When ink is sprayed into the emission region EMA, the volume at different locations can be different depending on the shape of the ink. As a result, the number of LEDs dispersed in the ink can vary depending on the volume of the ink. Within the emission region EMA, the number of LEDs can be non-uniform at the outer portions of the ink on the upper and lower sides of the emission region EMA adjacent to the dam BNL, depending on the volume of the ink. Since the second passivation layer PAS2 extends between the electrodes in the first direction DR1 to cover or overlap with the LEDs, most of the LEDs can have their two ends exposed and fixed by the second passivation layer PAS2. If the number of LEDs aligned in each sub-pixel SPXn is non-uniform, and all LEDs aligned on the electrode RME in each emission region EMA are connected, then different sub-pixels SPXn will have different brightness levels.

[0130] In view of the above, by selectively connecting the electrode RME only to the light-emitting diodes ED located at designated positions in the emission area EMA of the display device 10, the brightness difference can be reduced. For example, by specifying a position where the ink volume is uniform, the number of light-emitting diodes ED can be controlled, and by connecting only the light-emitting diodes ED located at that position, the brightness difference between sub-pixels SPXn can be reduced.

[0131] In the display device 10 according to the embodiment, only light-emitting diodes (LEDs) disposed at designated locations can be electrically connected to the electrode RME via a connecting electrode CNE that is in direct contact with the LEDs. The connecting electrode CNE includes main portions CMP1 and CMP2 and sub- portions CSP1 and CSP2 that are spaced apart from each other and face each other in the second direction DR2, and the distance between the main portions CMP1 and CMP2 and the sub- portions CSP1 and CSP2 in the second direction DR2 is different from the distance between the sub- portions CSP1 and CSP2 in the second direction DR2. The connecting electrode CNE can electrically connect only some or more of the LEDs ED disposed or disposed on the electrode RME (the electrode RME is disposed in some or more regions of the region) to the electrode RME. Among the LEDs ED, a first type LED ED#1 can have its two ends in contact with the main portions CMP1 and CMP2, respectively. The first type LED ED#1 can be disposed in the light-emitting region ELA of the emitting region EMA and electrically connected to the electrode RME to emit light in a wavelength range. Conversely, the second type of light-emitting diode ED#2 can have its two ends spaced apart from the sub-parts CSP1 and CSP2, respectively, or only one end (or one end) can be connected to the connecting electrode CNE. The second type of light-emitting diode ED#2 can be disposed in the non-emitting region ELA of the emitting region EMA and is not electrically connected to either of the electrodes RME, so as not to emit light. It should be noted that the first type of light-emitting diode ED#1 and the second type of light-emitting diode ED#2 can be fixed by the patterned portion of the second passivation layer PAS2. The length of the patterned portion of the second passivation layer PAS2 can be greater than the width of the emitting region ELA in the first direction DR1.

[0132] Each of the sub-pixels SPXn has an emission region EMA that may include an emission region ELA in which a first type of light-emitting diode ED#1 is disposed, and non-emission regions NEA1 and NEA2 in which a second type of light-emitting diode ED#2 is disposed. The emission region ELA is the portion in which the main portions CMP1 and CMP2 of the connecting electrode CNE are disposed, and may be located or disposed in the middle of the emission region EMA together with the first type of light-emitting diode ED#1. The emission region ELA may be formed to be spaced apart from the portion of the embankment BNL extending in the second direction DR2 along the first direction DR1. The first non-emission region NEA1 may be located or disposed above the emission region ELA in the first direction DR1, and the second non-emission region NEA2 may be located or disposed below the emission region ELA in the first direction DR1. The non-emission regions NEA1 and NEA2 are the portions in which the sub-portions CSP1 and CSP2 of the connecting electrode CNE are disposed, and may be located or disposed above and below the emission region EMA together with the second type of light-emitting diode ED#2. The non-luminescent regions NEA1 and NEA2 may be adjacent to the portion of the embankment BNL that extends in the second direction DR2.

[0133] Despite Figure 7 In the example shown, neither end of the second type LED ED#2 is in contact with the connecting electrode CNE, but the disclosure is not limited thereto. As described above, the electrode RME and the connecting electrode CNE are arranged such that they are spaced apart by a certain distance from the same imaginary line extending in the first direction DR1. However, if the mask used to form the pattern is not aligned during the process of forming the connecting electrode CNE, the connecting electrode CNE will shift in one direction. Even if the connecting electrode CNE is shifted, the second type LED ED#2 can still remain an unconnected LED because the distance W2 between the sub-parts CSP1 and CSP2 of the connecting electrode CNE is greater than the length LD of the LED ED.

[0134] Figure 8 This is a schematic cross-sectional view showing a portion of a display device according to an embodiment in which a second light-emitting diode is disposed.

[0135] Further reference Figure 8In some embodiments, the first end of the second type LED ED#2 may be spaced apart from the first connecting electrode CNE1, while the second end of the second type LED ED#2 may contact the second connecting electrode CNE2. If the connecting electrode CNE shifts to the left side in the second direction DR2, the second end, which is the right end of the second type LED ED#2, may contact the second sub-part CSP2 of the second connecting electrode CNE2. If this occurs, since the distance W2 between the first sub-part CSP1 of the first connecting electrode CNE1 and the second sub-part CSP2 of the second connecting electrode CNE2 is greater than the length LD of the LED ED, the first end, which is the left end of the second type LED ED#2, may not contact the first sub-part CSP1, but may be spaced apart from it. Therefore, even if the connecting electrode CNE shifts to one side, the opposite side, or the other side in the second direction DR2, the second type LED ED#2 can still remain an unconnected LED.

[0136] Return to reference Figures 3 to 7 According to an embodiment, the connecting electrode CNE may further include electrode contacts CTP1 and CTP2, which are respectively connected to sub-parts CSP1 and CSP2, and have a width greater than the width of sub-parts CSP1 and CSP2 as measured in the second direction DR2. The first electrode contact CTP1 of the first connecting electrode CNE1 can contact the first electrode RME1 through the first contact CT1, and the second electrode contact CTP2 of the second connecting electrode CNE2 can contact the second electrode RME2 through the second contact CT2.

[0137] According to an embodiment, contacts CT1 and CT2 may be spaced apart from the region where the light-emitting diode ED is disposed in the first direction DR1, such that they are not superimposed on the light-emitting diode ED in the second direction DR2. Although contacts CT1 and CT2 are formed in sub-region SA in the figures, the disclosure is not limited thereto. Contacts CT1 and CT2 may be formed in the portion of the emitting region EMA where the light-emitting diode ED is not disposed.

[0138] The connecting electrode CNE may include a conductive material. For example, within the spirit and scope of the disclosure, the connecting electrode CNE may include ITO, IZO, ITZO, aluminum (Al), etc. For example, the connecting electrode CNE may include a transparent conductive material, and light emitted from the light-emitting diode ED can pass through the connecting electrode CNE to travel toward the electrode RME. However, it will be understood that the disclosure is not limited thereto.

[0139] Although not shown in the accompanying drawings, another insulating layer may be further disposed on the second passivation layer PAS2 and the connection electrode CNE. This other insulating layer can protect the components disposed thereunder from the influence of the external environment.

[0140] The first passivation layer PAS1 may include an inorganic insulating material or an organic insulating material, and the second passivation layer PAS2 may include an organic insulating material. However, it will be understood that the disclosure is not limited thereto.

[0141] According to an embodiment, the connection electrode CNE of the display device 10 may include main portions CMP1 and CMP2 and sub-portions CSP1 and CSP2 with different widths, and the distance between the main portions CMP1 and CMP2 and each other in the second direction DR2 is different from the distance between the sub-portions CSP1 and CSP2 and each other in the second direction DR2. Depending on the relative arrangement of the main portions CMP1 and CMP2 or the sub-portions CSP1 and CSP2 with respect to the connection electrode CNE, the light-emitting diodes ED arranged or disposed on the electrode RME can be classified as connected light-emitting diodes and unconnected light-emitting diodes. The emission region EMA of each sub-pixel SPXn may include a light-emitting region ELA and non-light-emitting regions NEA1 and NEA2. Because the connection electrode CNE of the display device 10 has this shape, a region of each sub-pixel SPXn can be designated as a light-emitting region ELA, and a uniform number of light-emitting diodes ED can be disposed in the light-emitting region ELA of each sub-pixel SPXn. In this way, the brightness difference between sub-pixels SPXn in the display device 10 according to the embodiment can be reduced.

[0142] Figure 9 This is a view showing the light-emitting element according to an embodiment.

[0143] Reference Figure 9 The light-emitting element (ED) can be a light-emitting diode. For example, the ED can have dimensions ranging from nanometers to micrometers and can be an inorganic light-emitting diode made of inorganic materials. The ED can be aligned between two electrodes facing each other by generating polarity through an electric field formed in the direction between the two electrodes.

[0144] According to embodiments, a light-emitting diode (ED) can have a shape extending in one direction (or a direction). Within the spirit and scope of the disclosure, the light-emitting element (ED) can have a shape that is substantially cylindrical, rod-shaped, linear, tubular, etc. It will be understood that the shape of the light-emitting diode (ED) is not limited thereto. The light-emitting diode (ED) can have various shapes, including substantially polygonal prism shapes (such as substantially cubic, substantially cuboid, and substantially hexagonal prisms) or shapes having a partially inclined outer surface and extending in one direction.

[0145] A light-emitting diode (ED) may include a semiconductor layer doped with impurities of a certain conductivity type (e.g., p-type or n-type). The semiconductor layer can emit light of a certain wavelength by transmitting an electrical signal applied from an external power source. The ED may include a first semiconductor layer 31, a second semiconductor layer 32, an emitting layer 36, an electrode layer 37, and an insulating film 38.

[0146] The first semiconductor layer 31 can also be an n-type semiconductor. The first semiconductor layer 31 may include a semiconductor material having the following chemical formula: Al x Ga y In 1-x-y N (0≤x≤1, 0≤y≤1, 0≤x+y≤1). For example, the first semiconductor layer 31 can be one or more of n-type doped AlGaInN, GaN, AlGaN, InGaN, AlN, and InN. Within the spirit and scope of the disclosure, the n-type dopant doped into the first semiconductor layer 31 can be Si, Ge, Se, Sn, etc.

[0147] The second semiconductor layer 32 is disposed above the first semiconductor layer 31, and the emitter layer 36 is disposed between the first semiconductor layer 31 and the second semiconductor layer 32. The second semiconductor layer 32 may be a p-type semiconductor and may include a semiconductor material having the following chemical formula: Al x Ga y In 1-x-y N (0≤x≤1, 0≤y≤1, 0≤x+y≤1). For example, the second semiconductor layer 32 can be one or more of p-type doped AlGaInN, GaN, AlGaN, InGaN, AlN, and InN. Within the spirit and scope of the disclosure, the p-type dopant doped into the second semiconductor layer 32 can be Mg, Zn, Ca, Ba, etc.

[0148] Although each of the first semiconductor layer 31 and the second semiconductor layer 32 is shown as a single layer in the figures, the disclosure is not limited thereto. Depending on the material of the emitter layer 36, the first semiconductor layer 31 and the second semiconductor layer 32 may also include a greater number of layers, such as a cladding layer or a tensile strain barrier reduction (TSBR) layer.

[0149] An emitter layer 36 is disposed between a first semiconductor layer 31 and a second semiconductor layer 32. The emitter layer 36 may comprise a material having a single quantum well structure or a multiple quantum well structure. When the emitter layer 36 comprises a material having a multiple quantum well structure, the structure may comprise quantum layers and well layers stacked alternately on top of each other. The emitter layer 36 may emit light in response to an electrical signal applied through the first semiconductor layer 31 and the second semiconductor layer 32 when electron-hole pairs recombine therein. The emitter layer 36 may comprise materials such as AlGaN and AlGaInN. When the emitter layer 36 has a multiple quantum well structure in which quantum layers and well layers may be stacked alternately on top of each other, the quantum layers may comprise AlGaN or AlGaInN, and the well layers may comprise materials such as GaN, InGaN, or AlGaN.

[0150] The emitting layer 36 may have a structure in which semiconductor materials with large band gaps and semiconductor materials with small band gaps can be stacked alternately, and may include other group III to group V semiconductor materials depending on the wavelength range of the emitted light. Therefore, the light emitted from the emitting layer 36 is not limited to the blue band. In some embodiments, the emitting layer 36 may emit red or green band light.

[0151] Electrode layer 37 may be an ohmic connection electrode. However, it will be understood that the disclosure is not limited thereto. Electrode layer 37 may be a Schottky connection electrode. A light-emitting diode (ED) may include at least one electrode layer 37. A light-emitting diode (ED) may include one or more electrode layers 37. However, it will be understood that the disclosure is not limited thereto. Electrode layer 37 may be eliminated.

[0152] When the light-emitting element ED is electrically connected to an electrode or connecting electrode in the display device 10, the electrode layer 37 can reduce the resistance between the light-emitting element ED and the electrode or connecting electrode. The electrode layer 37 may include a conductive metal. For example, the electrode layer 37 may include at least one of aluminum (Al), titanium (Ti), indium (In), gold (Au), silver (Ag), ITO, IZO, and ITZO.

[0153] The insulating film 38 may be configured to surround the outer surfaces of the semiconductor layer and the electrode layer. For example, the insulating film 38 may be configured to at least surround the outer surface of the emitting layer 36, and the light-emitting element ED may be exposed at both ends in the longitudinal direction. The cross-section of the portion of the upper surface of the insulating film 38 adjacent to at least one end of the light-emitting diode ED may be rounded.

[0154] The insulating film 38 may include, for example, silicon oxide (SiO2). x Silicon nitride (SiN) x ), silicon oxynitride (SiO) x N yAluminum nitride (AlN) x ) and aluminum oxide (AlO x The insulating film 38 is a material with insulating properties. Although the insulating film 38 is formed as a single layer in the drawings, the disclosure is not limited thereto. In embodiments, the insulating film 38 may be composed of a multilayer structure in which multiple layers can be stacked on top of each other.

[0155] The insulating film 38 protects the aforementioned components. The insulating film 38 prevents short circuits that could occur in the emitting layer 36 if the emitting layer 36 comes into direct contact with the electrodes through which electrical signals are transmitted to the light-emitting diode (ED). The insulating film 38 also prevents a decrease in luminous efficiency.

[0156] The outer surface of the insulating film 38 can be surface-treated. Light-emitting diodes (EDs) can be dispersed in ink, and the ink can be sprayed onto the electrodes. In doing so, a surface treatment can be applied to the insulating film 38 to make it hydrophobic or hydrophilic, preventing the EDs dispersed in the ink from agglomerating (clustering).

[0157] In the following description, display devices according to various embodiments will be described with reference to other accompanying drawings.

[0158] Figure 10 This is a schematic plan view illustrating sub-pixels of a display device according to an embodiment. Figure 11 yes Figure 10 A magnified view of part A2. Figure 12 It is along Figure 10 A schematic cross-sectional view taken from line Q4-Q4'. Figure 13 It is along Figure 10 A schematic cross-sectional view taken from line Q5-Q5'. Figure 12 A cross-section is shown passing through both ends of each of the first type LED ED#1 and the third type LED ED#3, which are connected LEDs. Figure 13 A cross-section is shown passing through both ends of each of the second-type LED ED#2 and the fourth-type LED ED#4, which are unconnected LEDs.

[0159] Reference Figures 10 to 13 The display device 10_1 according to the embodiment may include a greater number of electrodes RME_1 for each of the sub-pixels SPXn, and the number of light-emitting diodes ED provided in each of the sub-pixels SPXn may be increased. Therefore, a greater number of connection electrodes CNE_1 including main portions CMP1, CMP2 and CMP3 and sub-portions CSP1, CSP2 and CSP3 may be provided.

[0160] For example, in addition to the first protruding pattern BN1 and the second protruding pattern BN2, the protruding pattern BN1 may also include a third protruding pattern BN3 with a different width than the first protruding pattern BN1 and the second protruding pattern BN2. The third protruding pattern BN3 may be disposed between the first protruding pattern BN1 and the second protruding pattern BN2, and may have a shape extending in the first direction DR1. The first protruding pattern BN1, the second protruding pattern BN2, and the third protruding pattern BN3 may have the same length extending in the first direction DR1, but the third protruding pattern BN3 may have a width, measured in the second direction DR2, that is larger than the width of the other protruding patterns.

[0161] The third protruding pattern BN3 can be spaced apart from the first protruding pattern BN1 and the second protruding pattern BN2 in the second direction DR2. The third protruding pattern BN3 can have a width greater than the width of the first protruding pattern BN1, so that the third electrode RME3, which will be described below, can be disposed. The light-emitting diode ED can be disposed between the first protruding pattern BN1 and the third protruding pattern BN3, and between the second protruding pattern BN2 and the third protruding pattern BN3.

[0162] The first electrode RME1 can be disposed on the first raised pattern BN1, and the second electrode RME2 can be disposed on the second raised pattern BN2. (See reference...) Figure 2 and Figure 3 A detailed description of them is given.

[0163] The third electrode RME3 is disposed on the third protrusion pattern BN3. The third electrode RME3 may extend in the first direction DR1 between the first electrode RME1 and the second electrode RME2, and may span the emission region EMA and the sub-region SA. In an embodiment, the width of the third electrode RME3 may be larger than the width of the first electrode RME1 and the second electrode RME2, and also larger than the width of the third protrusion pattern BN3. The third electrode RME3 may be configured to cover or overlap with the two side surfaces of the third protrusion pattern BN3, and may be spaced apart from the first electrode RME1 and the second electrode RME2 in the second direction DR2 and face the first electrode RME1 and the second electrode RME2.

[0164] Similar to the first electrode RME1, the third electrode RME3 can be connected to a third conductive layer below or beneath the via layer VIA. The third electrode RME3 can be connected to the second voltage line VL2 via a second contact hole CTS, which is formed at a location where the third electrode RME3 overlaps with the embankment BNL in the thickness direction. Therefore, unlike the first electrode RME1 and the third electrode RME3, the second electrode RME2 may not be connected to the third conductive layer. The second electrode RME2 can be connected to the second connection electrode CNE2, and an electrical signal flowing along the light-emitting diode ED can be applied to the second electrode RME2. As described later, the second electrode RME2, together with the second connection electrode CNE2, can provide electrical connection paths for different light-emitting diodes ED.

[0165] A light-emitting diode (LED) ED can be disposed between a first protruding pattern BN1 and a third protruding pattern BN3, and between the third protruding pattern BN3 and a second protruding pattern BN2. The first LED ED1 disposed between the first protruding pattern BN1 and the third protruding pattern BN3 can have a first end disposed on a first electrode RME1 and a second end disposed on one side of the third electrode RME3. The second LED ED2 disposed between the third protruding pattern BN3 and the second protruding pattern BN2 can have a first end disposed on a second electrode RME2 and a second end disposed on the opposite side of the third electrode RME3. According to an embodiment, the first end of the first LED ED1 can face an opposite direction to the first end of the second LED ED2.

[0166] The second passivation layer PAS2 may include a patterned portion disposed on the light-emitting diode ED between the protrusion patterns BN1, BN2, and BN3. The patterned portion of the second passivation layer PAS2 may extend in the first direction DR1 to cover the first light-emitting diode ED1 and the second light-emitting diode ED2, or may be superimposed on the first light-emitting diode ED1 and the second light-emitting diode ED2. These may surround and fix the light-emitting diode ED.

[0167] The connecting electrode CNE_1 may include a first connecting electrode CNE1 disposed on the first electrode RME1, a second connecting electrode CNE2 disposed on the opposite side of the third electrode RME3, and a third connecting electrode CNE3 disposed on one side of the third electrode RME3 and on the second electrode RME2.

[0168] The first connecting electrode CNE1 may contact one or more of the first ends of the first light-emitting diode ED1 and the first electrode RME1. The first connecting electrode CNE1 may contact the first electrode RME1 through a first contact CT1 that penetrates the first passivation layer PAS1. The second connecting electrode CNE2 may contact one or more of the second ends of the second light-emitting diode ED2 and the third electrode RME3. The second connecting electrode CNE2 may contact the third electrode RME3 through a second contact CT2 that penetrates the first passivation layer PAS1. The first connecting electrode CNE1 and the second connecting electrode CNE2 may have a shape that extends in a first direction DR1 and may be configured to extend from the emitting region EMA to the sub-region SA.

[0169] The third connecting electrode CNE3 may include a first extension CN_E1 disposed on one side of the third electrode RME3 and extending in the first direction DR1, a second extension CN_E2 disposed on the second electrode RME2 and extending in the first direction DR1, and a first bridging portion CN_B1 connecting the first extension CN_E1 and the second extension CN_E2. The first extension CN_E1 and the second extension CN_E2 of the third connecting electrode CNE3 may be spaced apart from each other in the second direction DR2, and the second connecting electrode CNE2 is located between the first extension CN_E1 and the second extension CN_E2. The first extension CN_E1 may be spaced apart from the first connecting electrode CNE1 and face the first connecting electrode CNE1, and the second extension CN_E2 may be spaced apart from the second connecting electrode CNE2 and face the second connecting electrode CNE2. The first extension CN_E1 may contact one or more of the second ends of the first light-emitting diodes ED1, and the second extension CN_E2 may contact one or more of the first ends of the second light-emitting diodes ED2.

[0170] The first bridging portion CN_B1 may have a shape extending from the sub-region SA in the second direction DR2, and may connect between the first extension CN_E1 and the second extension CN_E2. The second extension CN_E2 of the third connecting electrode CNE3 may extend to the sub-region SA, and may be connected to the second electrode RME2 via a second contact CT2 penetrating the first passivation layer PAS1. According to an embodiment, the width of the first bridging portion CN_B1 may be equal to the width of the third sub-part CSP3. As will be described later, the first bridging portion CN_B1 may connect between the extensions CN_E1 and CN_E2, and they may have the same width.

[0171] As described above, the first connecting electrode CNE1 and the second connecting electrode CNE2 each include main portions CMP1 and CMP2 and sub-portions CSP1 and CSP2. Similarly, the third connecting electrode CNE3 may also include a third main portion CMP3 and a third sub-portion CSP3. The first light-emitting diode ED1 and the second light-emitting diode ED2 can be classified as connected light-emitting diodes ED#1 and ED#3 and unconnected light-emitting diodes ED#2 and ED#4, respectively.

[0172] According to an embodiment, the first extension CN_E1 and the second extension CN_E2 of the third connecting electrode CNE3 may include a third main portion CMP3 and a third sub-portion CSP3 connected to the third main portion CMP3 and having a smaller width. The third main portion CMP3 of the first extension CN_E1 is spaced apart from the first main portion CMP1 in the second direction DR2 and faces the first main portion CMP1, and the third sub-portion CSP3 is connected to both sides of the third main portion CMP3 in the first direction DR1. The third sub-portion CSP3 of the first extension CN_E1 may be disposed in the emitter region EMA. The third main portion CMP3 may be in contact with the second passivation layer PAS2. The first distance W1 between the first main portion CMP1 and the third main portion CMP3 may be smaller than the second distance W2 between the first sub-portion CSP1 and the third sub-portion CSP3. The first light-emitting diode ED1 may include a first type light-emitting diode ED#1 and a second type light-emitting diode ED#2. The first type light-emitting diode ED#1 has its two ends in contact with the first main part CMP1 and the third main part CMP3, respectively. The second type light-emitting diode ED#2 has at least one of its two ends not in contact with the connecting electrode CNE_1. The first type light-emitting diode ED#1 may be disposed between the second type light-emitting diodes ED#2.

[0173] The third main portion CMP3 of the second extension CN_E2 is spaced apart from the second main portion CMP2 in the second direction DR2 and faces the second main portion CMP2. The third sub-portion CSP3 is connected to both sides of the third main portion CMP3 in the first direction DR1. The third sub-portion CSP3 of the second extension CN_E2 can extend beyond the emission region EMA and be disposed in the sub-region SA, and can be connected to the third electrode contact portion CTP3 disposed in the sub-region SA. The third electrode contact portion CTP3 can contact the second electrode RME2 via the third contact member CT3. Among the third sub-portions CSP3 of the first extension CN_E1 and the second extension CN_E2, the third sub-portions CSP3 disposed above the third main portion CMP3 can be connected to each other via the first bridging portion CN_B1. The third main portion CMP3 can contact the second passivation layer PAS2. The first distance W1 between the first main portion CMP1 and the third main portion CMP3 can be smaller than the second distance W2 between the second sub-portion CSP2 and the third sub-portion CSP3. The second light-emitting diode ED2 may include a third type light-emitting diode ED#3 and a fourth type light-emitting diode ED#4. The third type light-emitting diode ED#3 has its two ends in contact with the second main part CMP2 and the third main part CMP3, respectively. The fourth type light-emitting diode ED#4 has at least one of its two ends not in contact with the connecting electrode CNE_1. The third type light-emitting diode ED#3 may be disposed between the fourth type light-emitting diodes ED#4.

[0174] The first end of the first type LED ED#1 in the first LED ED1 can be electrically connected to the first electrode RME1 via the first connecting electrode CNE1, and the second end of the third type LED ED#3 in the second LED ED2 can be electrically connected to the third electrode RME3 via the second connecting electrode CNE2. The second end of the first type LED ED#1 can be connected in series with the first end of the third type LED ED#3 via the third connecting electrode CNE3. In addition to the parallel connection of the LEDs ED, the LEDs ED1 and ED2 located on opposite sides of the third protruding pattern BN3 can also be connected in series. Figure 2 Unlike other embodiments, the display device 10_1 according to this embodiment can include more light-emitting diodes ED for each of the sub-pixels SPXn to achieve series connection, thereby increasing the amount of light emitted per unit area.

[0175] Figure 14 This is a schematic plan view illustrating sub-pixels of a display device according to an embodiment. Figure 15 It shows the setting Figure 14 A schematic plan view of the relative arrangement of protrusion patterns, embankments, connecting electrodes, and light-emitting diodes in a sub-pixel. Figure 16It is along Figure 14 A schematic cross-sectional view taken from line Q6-Q6'. Figure 17 It is along Figure 14 A schematic cross-sectional view taken from line Q7-Q7'. Figure 16 A cross-section is shown passing through both ends of the connected light-emitting diode. Figure 17 A cross-section is shown passing through both ends of an unconnected light-emitting diode.

[0176] Reference Figures 14 to 17 According to the embodiment, the display device 10_2 may include a greater number of electrodes RME_2 for each of the sub-pixels SPXn, and the number of light-emitting diodes ED disposed in each of the sub-pixels SPXn may be increased. Therefore, a greater number of connecting electrodes CNE_2 may be provided, including main portions CMP1, CMP2, CMP3, CMP4, and CMP5, and sub-portions CSP1, CSP2, CSP3, CSP4, and CSP5. In the display device 10_2, four electrodes RME_2 (RME1, RME2, RME3, and RME4) may be provided for each of the sub-pixels SPXn, and five connecting electrodes CNE_2 (CNE1, CNE2, CNE3, CNE4, and CNE5) may be provided for a series connection configuration of the light-emitting diodes ED (ED1, ED2, ED3, and ED4) disposed therebetween. In the following description, the description will focus on the differences, and redundant descriptions will be omitted.

[0177] The first electrode RME1_2, the third electrode RME3_2, the second electrode RME2_2, and the fourth electrode RME4_2 are arranged or configured in this order along the second direction DR2. Electrode RME_2 may extend along the first direction DR1 and may be arranged or configured across the emission region EMA and the sub-region SA.

[0178] The first electrode RME1 is disposed on the first raised pattern BN1, and the third electrode RME3 is disposed on one side of the third raised pattern BN3. The second electrode RME2 may be disposed on the opposite side of the third raised pattern BN3, and the fourth electrode RME4 may be disposed on the second raised pattern BN2. The electrodes RME2 may be spaced apart from each other in the second direction DR2, and the first electrode RME1 and the third electrode RME3 may face each other, as may the second electrode RME2 and the fourth electrode RME4.

[0179] The first electrode RME1 and the second electrode RME2 can be connected to the third conductive layer either through the first contact hole CTD and the second contact hole CTS penetrating the through-hole layer VIA, or directly connected to it. The first contact hole CTD and the second contact hole CTS are formed at the locations where the first electrode RME1 and the second electrode RME2 overlap with the embankment BNL. On the other hand, the third electrode RME3 and the fourth electrode RME4 can be unconnected or not directly connected to the third conductive layer. The third electrode RME3 and the fourth electrode RME4 can be connected to the third connecting electrode CNE3 and the fifth connecting electrode CNE5, respectively, and an electrical signal flowing along the light-emitting diode ED can be applied to the third electrode RME3 and the fourth electrode RME4. As will be described later, the third electrode RME3 and the fourth electrode RME4, together with the third connecting electrode CNE3 and the fifth connecting electrode CNE5, can provide electrical connection paths for different light-emitting diodes ED.

[0180] In the light-emitting diodes (LEDs), a first LED ED1 and a third LED ED3 can be disposed between a first protrusion pattern BN1 and a third protrusion pattern BN3, and a second LED ED2 and a fourth LED ED4 can be disposed between a third protrusion pattern BN3 and a second protrusion pattern BN2. The first LED ED1 and the second LED ED2 can be disposed in the emission region EMA of each sub-pixel SPXn adjacent to a sub-region SA of the sub-pixel SPXn, while the third LED ED3 and the fourth LED ED4 can be disposed in the emission region EMA of each sub-pixel SPXn adjacent to a sub-region SA of another sub-pixel SPXn. In other words, the first LED ED1 and the second LED ED2 can be disposed on one side (e.g., the lower side) of the emission region EMA in the first direction DR1, and the third LED ED3 and the fourth LED ED4 can be disposed on the opposite side (e.g., the upper side) of the emission region EMA in the first direction DR1.

[0181] It should be noted that light-emitting diodes (EDs) can be classified not according to their position in the emission region (EMA), but according to their connection relationship with the connection electrodes (CNE_2), which will be described later. The two ends of an ED can contact different connection electrodes (CNE_2) depending on the arrangement of the CNE_2, and can be classified as different EDs based on the type of connection electrodes (CNE_2) they contact.

[0182] The first end of the first light-emitting diode ED1 and the first end of the third light-emitting diode ED3 can be disposed on the first electrode RME1, and their second ends can be disposed on the third electrode RME3. The first end of the second light-emitting diode ED2 and the first end of the fourth light-emitting diode ED4 can be disposed on the fourth electrode RME4, and their second ends can be disposed on the second electrode RME2. The first end of the first light-emitting diode ED1 and the first end of the third light-emitting diode ED3 can face a different direction than the first ends of the second light-emitting diode ED2 and the first ends of the fourth light-emitting diode ED4.

[0183] The second passivation layer PAS2 may include a patterned portion disposed on the light-emitting diode ED between the protrusion patterns BN1, BN2, and BN3. The patterned portion of the second passivation layer PAS2 may extend in the first direction DR1 to cover or overlap with the light-emitting diodes ED (ED1, ED2, ED3, and ED4). They may surround and fix the light-emitting diodes ED.

[0184] In addition to the first connecting electrode CNE1 disposed on the first electrode RME1 and the second connecting electrode CNE2 disposed on the second electrode RME2, the connecting electrode CNE_2 may also include a third connecting electrode CNE3, a fourth connecting electrode CNE4 and a fifth connecting electrode CNE5 disposed across the electrode RME_2.

[0185] and Figure 2 and Figure 10Unlike other embodiments, each of the first connecting electrode CNE1 and the second connecting electrode CNE2 may have a relatively short length extending in the first direction DR1. The first connecting electrode CNE1 and the second connecting electrode CNE2 may be disposed below the center of the emission region EMA. The first connecting electrode CNE1 and the second connecting electrode CNE2 may be disposed across the emission region EMA and sub-region SA of the corresponding sub-pixel SPXn, and may contact the first electrode RME1 and the second electrode RME2 respectively via the first contact CT1 and the second contact CT2 formed in the sub-region SA. In the first direction DR1, the sub-parts CSP1 and CSP2 of the first connecting electrode CNE1 and the second connecting electrode CNE2 may be connected only to one side of the main parts CMP1 and CMP2, respectively. The first main part CMP1 of the first connecting electrode CNE1 may be disposed in the emission region EMA, and the first sub-part CSP1 may be connected to the lower side of the first main part CMP1 and may extend to the sub-region SA. The first bridging part CN_B1 of the third connecting electrode CNE3 may be disposed above the first main part CMP1 and spaced apart from it. Similarly, the second main part CMP2 of the second connecting electrode CNE2 can be disposed in the emitter region EMA, and the second sub-part CSP2 can be connected to the lower side of the second main part CMP2 and can extend to the sub-region SA. The third bridging part CN_B3 of the fifth connecting electrode CNE5 can be disposed on the upper side of the second main part CMP2 and spaced apart from it.

[0186] The third connecting electrode CNE3 may include a first extension CN_E1 disposed on the third electrode RME3, a second extension CN_E2 disposed on the first electrode RME1, and a first bridging portion CN_B1 connecting the first extension CN_E1 and the second extension CN_E2. The first extension CN_E1 may be spaced apart from and facing the first connecting electrode CNE1 in the second direction DR2, and the second extension CN_E2 may be spaced apart from the first connecting electrode CNE1 in the first direction DR1. The first extension CN_E1 may be disposed on the lower side of the emission region EMA of the corresponding sub-pixel SPXn, and the second extension CN_E2 may be disposed on the upper side of the emission region EMA. The first extension CN_E1 may span the emission region EMA and the sub-region SA to be connected to the third electrode RME3 via a third contact CT3 formed in the sub-region SA. The first bridging portion CN_B1 may span the first electrode RME1 and the third electrode RME3 and be disposed in the middle of the emission region EMA. The third connecting electrode CNE3 may extend generally in the first direction DR1 and may have a shape that bends in the second direction DR2 and extends again in the first direction DR1.

[0187] The fourth connecting electrode CNE4 may include a third extension CN_E3 disposed on the third electrode RME3, a fourth extension CN_E4 disposed on the fourth electrode RME4, and a second bridging portion CN_B2 connecting the third extension CN_E3 and the fourth extension CN_E4. The third extension CN_E3 may be spaced apart from and face the second extension CN_E2 of the third connecting electrode CNE3 in the second direction DR2, and the fourth extension CN_E4 may be spaced apart from and face the sixth extension CN_E6 of the fifth connecting electrode CNE5 (to be described) in the first direction DR1. The third extension CN_E3 and the fourth extension CN_E4 may be disposed on the upper side in the emission region EMA, and the second bridging portion CN_B2 may be disposed across the third electrode RME3, the second electrode RME2, and the fourth electrode RME4. The fourth connecting electrode CNE4 may be disposed in a shape surrounding the fifth extension CN_E5 of the fifth connecting electrode CNE5.

[0188] The fifth connecting electrode CNE5 may include a fifth extension CN_E5 disposed on the second electrode RME2, a sixth extension CN_E6 disposed on the fourth electrode RME4, and a third bridging portion CN_B3 connecting the fifth extension CN_E5 and the sixth extension CN_E6. The fifth extension CN_E5 may be spaced apart from and facing the fourth extension CN_E4 of the fourth connecting electrode CNE4 in the second direction DR2, and the sixth extension CN_E6 may be spaced apart from the second connecting electrode CNE2 in the second direction DR2. The fifth extension CN_E5 may be disposed on the upper side in the emission region EMA of the corresponding sub-pixel SPXn, and the sixth extension CN_E6 may be disposed on the lower side in the emission region EMA. The sixth extension CN_E6 may be disposed across the emission region EMA and the sub-region SA to connect to the fourth electrode contact CTP4, and the fourth electrode contact CTP4 may be connected to the fourth electrode RME4 via a fourth contact CT4 formed in the sub-region SA. The third bridging portion CN_B3 can span the second electrode RME2 and the fourth electrode RME4 and be positioned adjacent to the center of the emission region EMA. The fifth connecting electrode CNE5 can extend generally in the first direction DR1 and can have a shape that bends in the second direction DR2 and extends again in the first direction DR1.

[0189] The first connecting electrode CNE1 and the second connecting electrode CNE2 can be first-type connecting electrodes that are in contact with the first electrode RME1 and the second electrode RME2, respectively. They can be connected to or directly connected to the third conductive layer. The third connecting electrode CNE3 and the fifth connecting electrode CNE5 can be second-type connecting electrodes that are in contact with the third electrode RME3 and the fourth electrode RME4, respectively. They are not connected to or directly connected to the third conductive layer. The fourth connecting electrode CNE4 can be a third-type connecting electrode that is not in contact with electrode RME2.

[0190] Similar to the first connecting electrode CNE1 and the second connecting electrode CNE2, the third connecting electrode CNE3, the fourth connecting electrode CNE4, and the fifth connecting electrode CNE5 may also include main portions CMP3, CMP4, and CMP5, and sub-portions CSP3, CSP4, and CSP5, respectively. Each of the first extension CN_E1 and the second extension CN_E2 of the third connecting electrode CNE3 may include a third main portion CMP3 and a third sub-portion CSP3. The third main portion CMP3 of the first extension CN_E1 may be spaced apart from and face the first main portion CMP1. The third main portion CMP3 of the second extension CN_E2 may be spaced apart from and face the fourth main portion CMP4 of the third extension CN_E3. The third sub-portion CSP3 of the first extension CN_E1 may be connected to the lower side of the third main portion CMP3 and may be disposed in the sub-region SA. The third sub-portion CSP3 of the first extension CN_E1 may be connected to the third electrode contact portion CTP3. The first bridging part CN_B1 of the third connecting electrode CNE3 can be connected between the third main part CMP3 of the extension part CN_E1 and CN_E2.

[0191] Each of the third extension CN_E3 and the fourth extension CN_E4 of the fourth connecting electrode CNE4 may include a fourth main part CMP4 and a fourth sub-part CSP4. The fourth main part CMP4 of the third extension CN_E3 may be spaced apart from and face the third main part CMP3 of the first extension CN_E1. The fourth main part CMP4 of the fourth extension CN_E4 may be spaced apart from and face the fifth main part CMP5 of the fifth extension CN_E5. The fourth sub-part CSP4 may be connected to the upper side of each fourth main part CMP4 and connected to each other through the second bridging part CN_B2.

[0192] Each of the fifth extension CN_E5 and the sixth extension CN_E6 of the fifth connecting electrode CNE5 may include a fifth main portion CMP5 and a fifth sub-portion CSP5. The fifth main portion CMP5 of the fifth extension CN_E5 may be spaced apart from and face the fourth main portion CMP4 of the fourth extension CN_E4. The fifth main portion CMP5 of the sixth extension CN_E6 may be spaced apart from and face the second main portion CMP2. The fifth sub-portion CSP5 of the fifth extension CN_E5 may be connected to the upper side of the fifth main portion CMP5. The fifth sub-portion CSP5 of the sixth extension CN_E6 may be connected to the lower side of the fifth main portion CMP5 to be positioned in sub-region SA. The fifth sub-portion CSP5 of the sixth extension CN_E6 may be connected to the fourth contact CT4. The third bridging part CN_B3 of the fifth connecting electrode CNE5 can be connected between the fifth main part CMP5 of the extension part CN_E5 and the fifth main part CMP5 of the extension part CN_E6.

[0193] As described above, based on the arrangement of the connecting electrodes CNE_2, light-emitting diodes (EDs) can be classified into different types of EDs by referring to the connecting electrodes CNE_2 that are in contact with their two ends.

[0194] The first light-emitting diode ED1 may include a first type light-emitting diode ED#1 and a second type light-emitting diode ED#2. The first type light-emitting diode ED#1 has its two ends in contact with the first main part CMP1 and the third main part CMP3, respectively. The second type light-emitting diode ED#2 has at least one of its two ends not in contact with the connecting electrode CNE_2. In an embodiment, the two ends of the second type light-emitting diode ED#2 may be spaced apart from the first sub-part CSP1 and the third sub-part CSP3, and may not be in contact with them. The second light-emitting diode ED2 may include a third type light-emitting diode ED#3 and a fourth type light-emitting diode ED#4. The third type light-emitting diode ED#3 has its two ends in contact with the second main part CMP2 and the fifth main part CMP5, respectively. The fourth type light-emitting diode ED#4 has at least one of its two ends not in contact with the connecting electrode CNE_2. In an embodiment, the two ends of the fourth type light-emitting diode ED#4 may be spaced apart from the second sub-part CSP2 and the fifth sub-part CSP5, and may not be in contact with them.

[0195] The third LED ED3 may include a fifth type LED ED#5 and a sixth type LED ED#6. The fifth type LED ED#5 has its two ends in contact with the third main portion CMP3 and the fourth main portion CMP4, respectively. The sixth type LED ED#6 has at least one of its two ends not in contact with the connecting electrode CNE_2. In an embodiment, the two ends of the sixth type LED ED#6 may be spaced apart from the third sub-part CSP3 and the fourth sub-part CSP4, and may not be in contact with them. The fourth LED ED4 may include a seventh type LED ED#7 and an eighth type LED ED#8. The seventh type LED ED#7 has its two ends in contact with the fourth main portion CMP4 and the fifth main portion CMP5, respectively. The eighth type LED ED#8 has at least one of its two ends not in contact with the connecting electrode CNE_2. In an embodiment, the two ends of the eighth type LED ED#8 may be spaced apart from the fourth sub-part CSP4 and the fifth sub-part CSP5, and may not be in contact with them. Type 1 LED ED#1, Type 3 LED ED#3, Type 5 LED ED#5, and Type 7 LED ED#7 can be connected LEDs. Type 2 LED ED#2, Type 4 LED ED#4, Type 6 LED ED#6, and Type 8 LED ED#8 can be unconnected LEDs. Connected LEDs can be connected in series with each other via connecting electrode CNE_2. According to this embodiment, the display device 10_2 can include a greater number of LEDs ED for each sub-pixel SPXn to form a series connection, thereby further increasing the amount of light emitted per unit area.

[0196] Figure 18 This is a schematic plan view illustrating sub-pixels of a display device according to an embodiment. Figure 19 It shows the setting Figure 18 A schematic plan view of the relative arrangement of protrusion patterns, embankments, connecting electrodes, and light-emitting diodes in a sub-pixel.

[0197] Reference Figure 18 and Figure 19In the display device 10_3 according to the embodiment, the connecting electrode CNE_3 may include main portions CMP1, CMP2, CMP3, CMP4, and CMP5, and sub-portions CSP1, CSP2, CSP3, CSP4, and CSP5 connected to both sides of the main portions in the first direction DR1. Therefore, the mutually separated light-emitting regions ELA1 and ELA2 may be located or disposed in the emission region EMA between the first non-light-emitting region NEA1 and the second non-light-emitting region NEA2 adjacent to the embankment BNL, and the third non-light-emitting region NEA3 may be disposed between the light-emitting regions ELA1 and ELA2. This embodiment is similar to... Figure 7 The difference in the embodiments lies in the shape of the connecting electrode CNE_3. In the following description, the description will focus on the differences, and redundant descriptions will be omitted.

[0198] Above the center of the emission region EMA in each sub-pixel SPXn, there are a third main portion CMP3 of the second extension CN_E2 of the third connecting electrode CNE3, a fourth main portion CMP4 of the fourth connecting electrode CNE4, and a fifth main portion CMP5 of the fifth extension CN_E5 of the fifth connecting electrode CNE5. The area where the main portions are provided can be defined as the first light-emitting region ELA1.

[0199] Below the center of the emission region EMA in each sub-pixel SPXn, there are a first main portion CMP1 of the first connecting electrode CNE1, a second main portion CMP2 of the second connecting electrode CNE2, a third main portion CMP3 of the first extension CN_E1 of the third connecting electrode CNE3, and a fifth main portion CMP5 of the sixth extension CN_E6 of the fifth connecting electrode CNE5. The area where the main portions are provided can be defined as the second light-emitting region ELA2.

[0200] Above the first light-emitting region ELA1, the third sub-part CSP3 of the second extension CN_E2 of the third connecting electrode CNE3, the fourth sub-part CSP4 of the fourth connecting electrode CNE4, and the fifth sub-part CSP5 of the fifth extension CN_E5 of the fifth connecting electrode CNE5 can be disposed. The area containing these sub-parts can be defined as the first non-light-emitting region NEA1. Below the second light-emitting region ELA2, the first sub-part CSP1 of the first connecting electrode CNE1, the second sub-part CSP2 of the second connecting electrode CNE2, the third sub-part CSP3 of the first extension CN_E1 of the third connecting electrode CNE3, and the fifth sub-part CSP5 of the sixth extension CN_E6 of the fifth connecting electrode CNE5 can be disposed. The area containing these sub-parts can be defined as the second non-light-emitting region NEA2.

[0201] A sub-part of each of the connecting electrodes CNE_3 may be disposed between the first light-emitting region ELA1 and the second light-emitting region ELA2. A third non-light-emitting region NEA3 may be defined between the first light-emitting region ELA1 and the second light-emitting region ELA2. In the display device 10_3 according to this embodiment, in each of the sub-pixels SPXn, the connecting electrode CNE_3 may include more non-light-emitting regions NEA1, NEA2, and NEA3.

[0202] Incidentally, the patterned portion of the second passivation layer PAS2 covering the light-emitting diode ED or stacked with the light-emitting diode ED has a shape that extends in the first direction DR1 while exposing both ends of the light-emitting diode ED. These portions can have a length in the first direction DR1 that is greater than the width measured in the second direction DR2. Patterned portions with this shape can be easily peeled off in subsequent processes. For this purpose, the second passivation layer PAS2 can include a portion with a larger width connected to the patterned portion, such that it can have a structure that prevents the patterned portion from peeling off.

[0203] Figure 20 This is a schematic plan view illustrating sub-pixels of a display device according to an embodiment. Figure 21 It shows the setting Figure 20 A schematic plan view of the relative arrangement of the protrusion patterns, embankments, connecting electrodes, and the second insulating layer in the sub-pixel. Figure 22 yes Figure 20 A magnified view of part of A3. Figure 23 yes Figure 20 A magnified view of part of A4 paper. Figure 24 It is along Figure 20 A schematic cross-sectional view taken from line Q8-Q8'.

[0204] Reference Figures 20 to 24 According to this embodiment, the display device 10_4 may include a second passivation layer PAS2_4 covering a light-emitting diode ED or a patterned portion PT1, PT2, PT3, and PT4 superimposed on the light-emitting diode ED; a first support pattern SP1 and substrates BP1 and BP2 to prevent them from peeling off; and bridging members BR1, BR2, BR3, BR4, and BR5 connecting the patterned portions PT1, PT2, PT3, and PT4 to the first support pattern SP1 or substrates BP1 and BP2. This embodiment is similar to... Figure 14 The difference in the embodiment is that the second passivation layer PAS2_4 has a structure that prevents the patterned portions PT1, PT2, PT3 and PT4 from peeling off. In the following description, the description will focus on the differences and redundant descriptions will be omitted.

[0205] The second passivation layer PAS2_4 may include a first pattern portion PT1 disposed on the first light-emitting diode ED1, a second pattern portion PT2 disposed on the second light-emitting diode ED2, a third pattern portion PT3 disposed on the third light-emitting diode ED3, and a fourth pattern portion PT4 disposed on the fourth light-emitting diode ED4.

[0206] The first pattern portion PT1 and the third pattern portion PT3 can be disposed between the first protruding pattern BN1 and the third protruding pattern BN3, and can be spaced apart from each other in the first direction DR1 by the first bridging portion CN_B1 of the third connecting electrode CNE3. The first pattern portion PT1 and the third pattern portion PT3 can be spaced apart from the first bridging portion CN_B1. One side of the first pattern portion PT1 in the first direction DR1 can extend beyond the embankment BNL and connect to the first substrate BP1, and one side of the third pattern portion PT3 in the first direction DR1 can connect to the second substrate BP2 disposed on the embankment BNL.

[0207] The second pattern portion PT2 and the fourth pattern portion PT4 can be disposed between the third protruding pattern BN3 and the second protruding pattern BN2, and can be spaced apart from each other in the first direction DR1 by the third bridging portion CN_B3 of the fifth connecting electrode CNE5. The second pattern portion PT2 and the fourth pattern portion PT4 can be spaced apart from the third bridging portion CN_B3. One side of the second pattern portion PT2 in the first direction DR1 can extend beyond the embankment BNL and connect to the first substrate BP1, and one side of the fourth pattern portion PT4 in the first direction DR1 can connect to the second substrate BP2 disposed on the embankment BNL.

[0208] The second passivation layer PAS2-4 may include a first substrate BP1 disposed in the sub-region SA and a second substrate BP2 disposed on the embankment BNL. Some or more of the patterned portions disposed in the emission region EMA may extend in the first direction DR1 to connect to the first substrate BP1 or the second substrate BP2.

[0209] The first substrate BP1 can be disposed on the entire surface of the sub-region SA, except for the separation region ROP and the location where the connecting electrode CNE_4 is disposed. In the separation region ROP, after the second passivation layer PAS2_4 is formed, a process can be performed to separate the underlying electrode RME. Therefore, the first substrate BP1 may not be disposed in the separation region ROP. Since the connecting electrode CNE is disposed at the location where the second passivation layer PAS2_4 is not disposed, and is disposed above the side surface of the second passivation layer PAS2_4, the first substrate BP1 may not overlap with the connecting electrode CNE in the thickness direction.

[0210] A second substrate BP2 is disposed on a dam BNL. The second substrate BP2 may include a portion extending in a first direction DR1, a portion extending in a second direction DR2, and a portion protruding in the second direction DR2. The second substrate BP2 may extend in the first direction DR1 between adjacent sub-pixels SPXn in the second direction DR2, and may also extend in the second direction DR2 between adjacent sub-pixels SPXn in the first direction DR1. A portion of the portion of the second substrate BP2 extending in the first direction DR1 may protrude in the second direction DR2 to be disposed on the dam BNL between the emission region EMA and sub-region SA of each sub-pixel SPXn. Since the connecting electrode CNE is disposed on the dam BNL between the emission region EMA and sub-region SA of each sub-pixel SPXn, the portion of the second substrate BP2 extending in the first direction DR1 may be disposed on the dam BNL such that the second substrate BP2 does not overlap with the connecting electrode CNE. At the boundary of the sub-region SA surrounded by the dam BNL, the first substrate BP1 and the second substrate BP2 may contact each other.

[0211] Each of the first substrate BP1 and the second substrate BP2 may have a thickness equal to the thickness of the patterned portion, and may have a width greater than the width of the patterned portion as measured in the second direction DR2. Although the patterned portions PT1, PT2, PT3, and PT4 have a width smaller than the length of the light-emitting diode ED, the width of the first substrate BP1 and the width of the second substrate BP2 may be greater than the width of the dam BNL, or may be equal to the width of the area surrounded by the dam BNL. Compared to the patterned portions PT1, PT2, PT3, and PT4, the first substrate BP1 and the second substrate BP2 are not peeled off, but can be firmly disposed on the first passivation layer PAS1 and the dam BNL.

[0212] A first support pattern SP1 is disposed on a third protrusion pattern BN3. The first support pattern SP1 can be stacked with each portion of the second electrode RME2 and the third electrode RME3. The first support pattern SP1 can have a shape extending in a first direction DR1. Similar to the first substrate BP1 and the second substrate BP2, the first support pattern SP1 can also be securely disposed on the first passivation layer PAS1.

[0213] The second passivation layer PAS2_4 may include a bridging portion that connects the patterned portions PT1, PT2, PT3 and PT4 to the second substrate BP2 or the first support pattern SP1.

[0214] The first bridging member BR1 can be connected to the portion of the first patterned portion PT1 and the second substrate BP2 extending in the first direction DR1. The first bridging member BR1 can be disposed between the second extension CN_E2 of the first connecting electrode CNE1 and the third connecting electrode CNE3, and can have a shape extending in the second direction DR2. The first bridging member BR1 can be spaced apart from the first connecting electrode CNE1 and the third connecting electrode CNE3. The second bridging member BR2 can be connected to the second patterned portion PT2 and the first support pattern SP1. The second bridging member BR2 can be disposed between the second connecting electrode CNE2 and the fifth extension CN_E5 of the fifth connecting electrode CNE5, and can have a shape extending in the second direction DR2. The second bridging member BR2 can be spaced apart from the second connecting electrode CNE2 and the fifth connecting electrode CNE5.

[0215] The third bridging member BR3 can be connected to the third pattern portion PT3 and the first support pattern SP1. The third bridging member BR3 can be disposed between the first extension CN_E1 of the third connecting electrode CNE3 and the third extension CN_E3 of the fourth connecting electrode CNE4, and can have a shape extending in the second direction DR2. The third bridging member BR3 can be spaced apart from the third connecting electrode CNE3 and the fourth connecting electrode CNE4. The fourth bridging member BR4 can be connected to the fourth pattern portion PT4 and the first support pattern SP1. The fourth bridging member BR4 can be disposed between the second bridging portion CN_B2 of the fourth connecting electrode CNE4 and the fifth extension CN_E5 of the fifth connecting electrode CNE5, and can have a shape extending in the second direction DR2. The fourth bridging member BR4 can be spaced apart from the fourth connecting electrode CNE4 and the fifth connecting electrode CNE5.

[0216] The fifth bridging element BR5 can be connected to the portion of the fourth patterned portion PT4 and the second substrate BP2 extending in the first direction DR1. The fifth bridging element BR5 can be disposed between the fourth extension CN_E4 of the fourth connecting electrode CNE4 and the sixth extension CN_E6 of the fifth connecting electrode CNE5, and can have a shape extending in the second direction DR2. The fifth bridging element BR5 can be spaced apart from the fourth connecting electrode CNE4 and the fifth connecting electrode CNE5.

[0217] According to an embodiment, the bridging elements BR1, BR2, BR3, BR4, and BR5 of the second passivation layer PAS2_4, as well as the first support pattern SP1, are spaced apart from the connecting electrode CNE_4, and may have a width greater than the width of the pattern portions PT1, PT2, PT3, and PT4. As described above, the second passivation layer PAS2_4 is configured such that it does not overlap with the connecting electrode CNE_2 in the thickness direction. The pattern portions PT1, PT2, PT3, and PT4 of the second passivation layer PAS2_4 are connected to each other with the bridging elements BR1, BR2, BR3, BR4, and BR5, and therefore will not peel off, and may be spaced apart from the connecting electrode CNE_4.

[0218] The first patterned portion PT1, the second patterned portion PT2, and the third patterned portion PT3 of the second passivation layer PAS2-4 can extend in the first direction DR1 and can each be connected to the first substrate BP1 or the second substrate BP2. The first patterned portion PT1, the second patterned portion PT2, and the third patterned portion PT3 can cover the first light-emitting diode ED1, the second light-emitting diode ED2, and the third light-emitting diode ED3 or stack with the first light-emitting diode ED1, the second light-emitting diode ED2, and the third light-emitting diode ED3, regardless of whether they are connected or unconnected light-emitting diodes. Because the second passivation layer PAS2-4 has this structure, the light-emitting diodes ED aligned with the upper and lower embankments BNL adjacent to the emission region EMA may be fixed to the electrode RME. If this occurs, it is not easy to control the number of light-emitting diodes ED at the positions described above. The display device 10_4 according to the embodiment has a structure that can prevent the patterned portion of the second passivation layer PAS2_4 from peeling off, and the connecting electrode CNE_4 includes an electrode main portion and an electrode sub portion to define the light-emitting region ELA and the non-light-emitting regions NEA1 and NEA2 in which the connected light-emitting diodes are disposed. Therefore, even if the second passivation layer PAS2_4 fixes the undesirable light-emitting diodes ED, only some or more of the light-emitting diodes ED can be connected to the connecting electrode CNE_4, and there is the advantage that the number of connected light-emitting diodes emitting light in each of the sub-pixels SPXn can be controlled.

[0219] Figure 25 This is a schematic cross-sectional view showing a portion of a display device according to an embodiment. Figure 25 A cross-section is shown passing through both ends of the connected light-emitting diode.

[0220] Reference Figure 25The display device 10_5 according to the embodiment may further include a third passivation layer PAS3_5 disposed between the patterned portions PT1, PT2, PT3, and PT4 of the second passivation layer PAS2 and the light-emitting diode ED. The third passivation layer PAS3_5 may be formed before the second passivation layer PAS2 to fix the light-emitting diode ED. The second passivation layer PAS2 may be formed after the process of separating the electrode RME at the separation region ROP.

[0221] The third passivation layer PAS3_5 can be disposed below or beneath the patterned portions PT1, PT2, PT3, and PT4 of the second passivation layer PAS2 and the first support pattern SP1, and can have substantially the same shape. Although not shown in the figures, the third passivation layer PAS3_5 can have a shape extending in the first direction DR1 between the protruding patterns BN1, BN2, and BN3, and can cover or be stacked with the light-emitting diode ED. The two side surfaces of the third passivation layer PAS3_5 can be aligned with the two side surfaces of the patterned portions PT1, PT2, PT3, and PT4 of the second passivation layer PAS2, respectively. The third passivation layer PAS3_5 can be formed by applying an insulating material to the light-emitting diode ED to cover or stack it with the light-emitting diode ED and by patterning it during the same process as the second passivation layer PAS2. As a result, in the schematic plan view and schematic cross-sectional view, the pattern shape of the third passivation layer PAS3_5 can be substantially the same as the pattern shape of the second passivation layer PAS2.

[0222] According to an embodiment, the third passivation layer PAS3_5 may comprise an inorganic insulating material different from the second passivation layer PAS2_4. The third passivation layer PAS3_5 may be made of a material more similar to the material of the first passivation layer PAS1 than the material of the second passivation layer PAS2, and may surround the light-emitting diodes ED to fix and protect them.

[0223] In summarizing the detailed description, those skilled in the art will understand that many variations and modifications can be made to the embodiments without substantially departing from the disclosed principles. Therefore, the disclosed embodiments are used in a general and descriptive sense only and not for limiting purposes.

Claims

1. A display device, the display device comprising: The first electrode extends in a first direction; The second electrode is spaced apart from the first electrode in the second direction and extends in the first direction; A first insulating layer is disposed on the first electrode and the second electrode; A light-emitting element is disposed on the first insulating layer, and each of the light-emitting elements has at least one end disposed on the first electrode or the second electrode; A second insulating layer is disposed on the light-emitting element and extends in the first direction; A first connecting electrode is disposed on the first electrode and makes electrical contact with the light-emitting element; as well as A second connecting electrode is disposed on the second electrode and makes electrical contact with the light-emitting element. Each of the first connecting electrode and the second connecting electrode includes a main portion that is electrically in contact with the light-emitting element and a sub-portion that has a width smaller than that of the main portion and is electrically connected to the main portion.

2. The display device according to claim 1, wherein, The first distance between the first main part of the first connecting electrode and the second main part of the second connecting electrode is smaller than the second distance between the first sub-part of the first connecting electrode and the second sub-part of the second connecting electrode.

3. The display device according to claim 2, wherein, The first distance is smaller than the length of each of the light-emitting elements extending in the second direction.

4. The display device according to claim 2, wherein, The second distance is greater than the length of each of the light-emitting elements extending in the second direction.

5. The display device according to claim 4, wherein, The third distance between the first electrode and the second electrode is smaller than the length of each of the light-emitting elements.

6. The display device according to claim 2, wherein, The light-emitting element includes: A first type of light-emitting element has ends that are respectively electrically connected to the first main portion of the first connecting electrode and the second main portion of the second connecting electrode; and The second type of light-emitting element has at least one end that does not contact the first connecting electrode and the second connecting electrode and is spaced apart from the first sub-part of the first connecting electrode or the second sub-part of the second connecting electrode in the second direction.

7. The display device according to claim 6, wherein, At least a portion of the second type of light-emitting element has an end that does not contact the first connecting electrode and the second connecting electrode and is spaced apart from the first sub-part of the first connecting electrode and the second sub-part of the second connecting electrode in the second direction.

8. The display device according to claim 6, wherein, The second insulating layer is stacked with the first type of light-emitting element and the second type of light-emitting element, and The first main part and the second main part respectively contact the side surface of the second insulating layer disposed on the light-emitting element.

9. The display device according to claim 2, further comprising: A dam surrounds an emitting region including the light-emitting element and sub-regions spaced apart from the emitting region in the first direction. The first sub-part and the second sub-part extend from one side of the first main part and the second main part, respectively, in the first direction, and are disposed in the sub-region.

10. The display device according to claim 9, wherein, The first connecting electrode includes a first electrode contact disposed in the sub-region and electrically connected to the first sub-part of the first connecting electrode; The second connecting electrode includes a second electrode contact disposed in the sub-region and electrically connected to the second sub-part of the second connecting electrode; and The first electrode contact and the second electrode contact are respectively in electrical contact with the first electrode and the second electrode.

11. The display device according to claim 9, wherein, The first connecting electrode further includes another first sub-part electrically connected to the first main part of the first connecting electrode on the opposite side in the first direction. The second connecting electrode further includes another second sub-part connected to the second main part of the second connecting electrode on the opposite side in the first direction, and The emission area includes: a light-emitting area, comprising the first main portion and the second main portion; and a non-light-emitting area, comprising the first sub-part and the second sub-part, which is the area other than the light-emitting area.

12. The display device according to claim 11, wherein, The length of the second insulating layer measured in the first direction is greater than the width of the light-emitting region in the first direction.

13. A display device, the display device comprising: Electrodes extend in a first direction and are spaced apart from each other in a second direction perpendicular to the first direction. The electrodes include a first electrode, a second electrode spaced apart from the first electrode in the second direction, a third electrode disposed between the first electrode and the second electrode, and a fourth electrode spaced apart from the second electrode in the second direction. A first insulating layer is disposed on the electrode; The first light-emitting element has ends respectively disposed on the first electrode and the third electrode, and is disposed in the first direction; The second light-emitting element has ends respectively disposed on the second electrode and the fourth electrode, and is disposed in the first direction; The second insulating layer includes a first pattern portion disposed on the first light-emitting element and extending in the first direction, and a second pattern portion disposed on the second light-emitting element and extending in the first direction; as well as The connecting electrodes include a first connecting electrode disposed on the first electrode, a second connecting electrode disposed on the second electrode, a third connecting electrode disposed across the first electrode and the third electrode, a fourth connecting electrode disposed across the third electrode and the fourth electrode, and a fifth connecting electrode disposed across the second electrode and the fourth electrode, wherein... Each of the connecting electrodes includes a main portion that electrically contacts the light-emitting element and a sub-portion that has a width smaller than the main portion and is electrically connected to the main portion. The main portion and the sub-portion of each of the connecting electrodes are spaced apart from and face the connecting electrode in the second direction, and The first distance between the main parts is smaller than the second distance between the sub-parts.

14. The display device according to claim 13, wherein, The first distance is smaller than the length of the light-emitting element extending in the second direction.

15. The display device according to claim 13, wherein, The second distance is greater than the length of the light-emitting element extending in the second direction.

16. The display device according to claim 13, wherein, The light-emitting element includes: A first type of light-emitting element has ends that are respectively electrically contacting the main portion of each of the connecting electrodes; and The second type of light-emitting element has at least one end that does not contact the connecting electrode and is spaced apart from the sub-parts of each of the connecting electrodes in the second direction.

17. The display device according to claim 13, wherein, The second insulating layer includes: A first support pattern is partially disposed on the second electrode and the third electrode and extends in the first direction; and A bridging member having a shape extending in the second direction and electrically connected to at least one of the first patterned portion and the second patterned portion, as well as the first support pattern.

18. The display device according to claim 17, wherein, Each of the first support pattern and the bridging member has a width greater than the width of the first pattern portion and the second pattern portion.

19. The display device according to claim 18, wherein, The first support pattern is spaced apart from the second main portion of the second connecting electrode and the third main portion of the third connecting electrode.

20. The display device according to claim 17, wherein, The first patterned portion makes electrical contact with the main portion of the first connecting electrode and the main portion of the third connecting electrode, and The second patterned portion makes electrical contact with the main portion of the second connecting electrode and the main portion of the fourth connecting electrode.

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