Display device

Abstract

A display device includes a substrate, a drive transistor and a power line provided to be spaced apart from each other on the substrate, a plurality of light emitting elements including a first light emitting element and a second light emitting element connected in series with the first light emitting element, and a shared electrode provided on the substrate, the first light emitting element and the second light emitting element each including a first electrode and a second electrode, the second electrode of the first light emitting element being electrically connected to the drive transistor, the first electrode of the second light emitting element being electrically connected to the power line, and the shared electrode being electrically connected to the first electrode of the second light emitting element and the second electrode of the first light emitting element. Accordingly, power consumption can be reduced.

Description

Technical Field

[0001] This disclosure relates to a display device, and more specifically, for example, but not limited to, a display device with reduced power consumption. Background Technology

[0002] Display devices used for monitors in computers, televisions, or mobile phones include self-emissive organic light-emitting displays (OLEDs) and liquid crystal displays (LCDs) that require a separate light source.

[0003] Display devices have been used in a variety of applications, including computer monitors and TVs as well as personal portable devices, and research is underway on display devices with large display areas and reduced size and weight.

[0004] In addition, display devices including light-emitting diodes (LEDs) have recently attracted attention as next-generation display devices. Because LEDs are made of inorganic materials rather than organic materials, they offer superior reliability and a longer lifespan than liquid crystal displays or organic light-emitting displays. Furthermore, LEDs have a fast emission speed, excellent luminous efficiency, and strong shock resistance, resulting in excellent stability and the ability to display high-brightness images. Summary of the Invention

[0005] The purpose of this disclosure is to provide a display device in which a plurality of light-emitting elements are connected in series to drive at low power in order to reduce power consumption.

[0006] The purpose of this disclosure is to provide a display device in which a plurality of light-emitting elements are disposed in a sub-pixel to achieve high resolution.

[0007] The purpose of this disclosure is to provide a display device in which the remaining light-emitting elements can be driven normally even if any one of the plurality of light-emitting elements is defective.

[0008] The purpose of this disclosure is to provide a display device capable of repairing defective light-emitting elements.

[0009] The purpose of this disclosure is not limited to the above-described purposes, and other purposes not mentioned above will be clearly understood by those skilled in the art from the following description.

[0010] According to an embodiment of this disclosure, a display device includes: a substrate defining a plurality of sub-pixels; driving transistors and power lines arranged spaced apart from each other on the substrate; a plurality of light-emitting elements, including a first light-emitting element disposed in at least some of the plurality of sub-pixels and a second light-emitting element connected in series with the first light-emitting element; and a shared electrode disposed on the substrate and electrically connecting the first light-emitting element and the second light-emitting element in at least some of the plurality of sub-pixels. Each of the first and second light-emitting elements includes a first electrode and a second electrode. The second electrode of the first light-emitting element is electrically connected to the driving transistor, and the first electrode of the second light-emitting element is electrically connected to the power lines. The shared electrode is electrically connected to both the first and second electrodes of the second light-emitting element. Therefore, power consumption can be reduced.

[0011] Further details of the implementation methods are included in the detailed description and accompanying drawings.

[0012] According to embodiments of this disclosure, a high-resolution display device can be achieved by providing multiple light-emitting elements connected in series to sub-pixels.

[0013] According to embodiments of this disclosure, in terms of reducing power consumption, low power can be used to drive the display device.

[0014] According to embodiments of this disclosure, defective light-emitting elements can be easily repaired.

[0015] According to embodiments of this disclosure, even if a defect occurs in one of a plurality of light-emitting elements connected in series, the remaining light-emitting elements are still driven normally to minimize or reduce dark spot defects in the sub-pixels.

[0016] The effects of this disclosure are not limited to the examples above, and many more effects are included in this disclosure.

[0017] Other systems, methods, features, and advantages will be apparent to those skilled in the art upon examination of the following figures and detailed description. All such additional systems, methods, features, and advantages are intended to be included within this specification, within the scope of this disclosure, and protected by the appended claims. Nothing in this section should be construed as limiting those claims. Further aspects and advantages are discussed below in conjunction with embodiments of this disclosure.

[0018] It should be understood that both the foregoing general description and the following detailed description are exemplary and illustrative, and are intended to provide further explanation of the claimed inventive concept. Attached Figure Description

[0019] The above and other aspects, features and advantages of this disclosure will become clearer from the following detailed description taken in conjunction with the accompanying drawings, in which: Figure 1 This is a schematic block diagram of a display device according to an exemplary embodiment of the present disclosure.

[0020] Figure 2A This is a partial cross-sectional view of a display device according to an exemplary embodiment of the present disclosure.

[0021] Figure 2B This is a perspective view of a splicing display device according to an exemplary embodiment of the present disclosure.

[0022] Figure 3 This is a circuit diagram of a sub-pixel of a display device according to an exemplary embodiment of the present disclosure.

[0023] Figure 4 This is a plan view of the sub-pixels of a display device according to an exemplary embodiment of the present disclosure.

[0024] Figure 5A It is along the exemplary embodiments of this disclosure. Figure 3 A cross-sectional view taken from line Va-Va'.

[0025] Figure 5B It is along the exemplary embodiments of this disclosure. Figure 3 A cross-sectional view of the line Vb-Vb'.

[0026] Figure 6 This is a plan view of the sub-pixels of a display device according to an exemplary embodiment of the present disclosure.

[0027] Figure 7 It is along the exemplary embodiments of this disclosure. Figure 6 The cross-sectional view taken from line VII-VII'.

[0028] Figure 8 This is a plan view of the sub-pixels of a display device according to an exemplary embodiment of the present disclosure.

[0029] Figure 9 It is along the exemplary embodiments of this disclosure. Figure 8 The cross-sectional view taken by line IX-IX'.

[0030] Figures 10A to 10C This is a plan view of the pixels of a display device according to an exemplary embodiment of the present disclosure.

[0031] Figure 11 This is a plan view of the sub-pixels of a display device according to another exemplary embodiment of the present disclosure.

[0032] Figure 12 It is according to another exemplary embodiment of this disclosure along Figure 11 The cross-sectional view taken from line XII-XII'.

[0033] Figure 13 This is a plan view of the sub-pixels of a display device according to another exemplary embodiment of the present disclosure.

[0034] Figure 14 This is along another exemplary embodiment of the present disclosure. Figure 13 A cross-sectional view taken from line XIV-XIV'.

[0035] Figure 15 This is a plan view of the sub-pixels of a display device according to another exemplary embodiment of the present disclosure.

[0036] Figure 16 This is along another exemplary embodiment of the present disclosure. Figure 14 The cross-sectional view taken by line XVI-XVI'.

[0037] Throughout the accompanying drawings and detailed description, unless otherwise stated, the same reference numerals shall be construed as referring to the same elements, features, and structures. For clarity, illustration, and convenience, the relative sizes and depictions of these elements may be exaggerated. Detailed Implementation

[0038] Reference will now be made in detail to embodiments of this disclosure, examples of which are illustrated in the accompanying drawings. In the following description, detailed descriptions of well-known functions or configurations relevant to this document will be omitted or may be briefly discussed where it is determined that such detailed descriptions would unnecessarily obscure the essential points of the inventive concept. The described process steps and / or order of operations are exemplary; however, the order of steps and / or operations is not limited to the order set forth herein and may be varied as is known in the art, except for steps and / or operations that must occur in a specific order. The same reference numerals always refer to the same elements. The names of the corresponding elements used in the following explanation may be chosen solely for the convenience of writing the specification and may therefore differ from those used in actual products.

[0039] The advantages and features of this disclosure, as well as methods for achieving these advantages and features, will become clear from the following detailed description of exemplary embodiments in conjunction with the accompanying drawings. However, this disclosure is not limited to the exemplary embodiments disclosed herein, but will be implemented in various forms. Exemplary embodiments are provided by way of example only so that those skilled in the art can fully understand the disclosure and scope of this disclosure.

[0040] The shapes, sizes, proportions, angles, quantities, etc., shown in the accompanying drawings to describe exemplary embodiments of this disclosure are merely examples, and this disclosure is not limited thereto. Furthermore, in the following description of this disclosure, specific explanations of known related technologies may be omitted to avoid unnecessarily obscuring the subject matter of this disclosure. Unless a term is used with the term "only," terms such as "comprising," "having," and "consisting of" as used herein are generally intended to allow for the addition of other components. Unless otherwise expressly indicated, any reference to the singular may include the plural.

[0041] Any implementation described in this article as an "example" is not necessarily to be interpreted as preferred or advantageous over other implementations.

[0042] Even if not explicitly stated, components are interpreted as including a normal error range.

[0043] When using terms such as “above,” “over,” “below,” and “adjacent” to describe the positional relationship between two parts, one or more parts may be positioned between the two parts unless the terms are used together with the terms “immediately adjacent” or “directly.”

[0044] When an element or layer is placed "on" another element or layer, the other layer or element can be directly inserted onto or placed between the other element.

[0045] Although the terms "first," "second," etc., are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from others. Therefore, in the technical concept of this disclosure, the first component referred to below may be the second component.

[0046] When describing temporal relationships, when the temporal order is described as such as "after", "following", "next" and "before", discontinuous situations may be included unless more restrictive terms such as "exactly", "immediately" or "directly" are used.

[0047] Furthermore, when a component or layer is “connected,” “joined,” or “adheded” to another component or layer, unless otherwise stated, the component or layer may not only be directly connected or adhered to the other component or layer, but also indirectly connected or attached to the other component or layer, with one or more intermediate components or layers “set” or “inserted” between the components or layers. This should be understood to mean that components may be arranged to be in direct contact with each other, or may be arranged to be in direct contact with each other.

[0048] The expressions "first element," "second element," and " / or" "third element" should be understood as one of the first element, the second element, and the third element, or any or all combinations of the first element, the second element, and the third element. For example, A, B, and / or C can refer to only A; only B; only C; any or some combinations of A, B, and C; or all of A, B, and C.

[0049] The term “at least one” should be understood to include any and all combinations of one or more associated listed items. For example, “at least one of the first element, the second element, and the third element” means a combination of all three listed elements, a combination of any two of the three elements, and each individual element (the first element, the second element, or the third element).

[0050] Throughout the disclosure, the same reference numerals generally denote the same elements.

[0051] The size and thickness of each component shown in the accompanying drawings are for ease of description, and this disclosure is not limited to the size and thickness of the components shown.

[0052] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which the example embodiments pertain. It should also be understood that terms such as those defined in common dictionaries should be interpreted as having a meaning consistent with, for example, their meaning in the context of the relevant field, and should not be interpreted in an idealized or overly formal sense unless explicitly defined herein. For example, as one of ordinary skill in the art will understand, the terms “component” or “unit” can be applied to, for example, a single circuit or structure, an integrated circuit, a computational block of a circuit device, or any structure configured to perform the described functions.

[0053] In contrast, these embodiments may be provided to make this disclosure sufficiently thorough and complete to assist those skilled in the art in fully understanding its scope. Furthermore, this disclosure is limited only by the scope of the claims.

[0054] Features of the various embodiments of this disclosure may be partially or completely bonded or combined with each other, and may be interlocked and operated in technically different ways, and the embodiments may be performed independently of each other or in relation to each other.

[0055] The contents of this disclosure will be described in detail below with reference to the accompanying drawings.

[0056] Figure 1 This is a schematic block diagram of a display device according to an exemplary embodiment of the present disclosure. Figure 1For ease of description, only the display panel PN, the gating driver GD, the data driver DD, and the timing controller TC are shown among the various components of the display device 100.

[0057] Reference Figure 1 The display device 100 includes: a display panel PN, which includes a plurality of sub-pixels SP; a gating driver GD and a data driver DD, which provide various signals to the display panel PN; and a timing controller TC, which controls the gating driver GD and the data driver DD.

[0058] The gating driver GD provides multiple scan signals to multiple scan lines SL based on multiple gating control signals provided by the timing controller TC. Figure 1 An example is shown where a gating driver GD is positioned spaced apart from one side of the display panel PN. However, the number and arrangement of gating drivers GDs are not limited to this.

[0059] The data driver DD can respond to multiple data control signals provided from the timing controller TC by using a reference gamma voltage to convert image data input from the timing controller TC into a data voltage, and provide the converted data voltage to multiple data lines DL.

[0060] The timing controller TC aligns the externally input image data and provides it to the data driver DD. The timing controller TC can use an externally input synchronization signal to generate gating control signals and data control signals. Furthermore, the timing controller TC provides the generated gating control signals and data control signals to the gating driver GD and the data driver DD, respectively, to control them.

[0061] The display panel PN is configured to display an image to the user and includes multiple subpixels SP. In the display panel PN, multiple scan lines SL and multiple data lines DL intersect each other, and each of the multiple subpixels SP is connected to both scan lines SL and data lines DL. Additionally, although not shown in the accompanying drawings, each of the multiple subpixels SP may be connected to a high-potential power line, a low-potential power line, a reference line, etc.

[0062] In the display panel PN, a display area AA and a non-display area NA surrounding the display area AA can be defined. The display area AA is the area in the display device 100 where an image is displayed. Within the display area AA, multiple sub-pixels SP constituting multiple pixels PX and circuitry for driving the multiple sub-pixels SP can be provided. The multiple sub-pixels SP are the smallest units constituting the display area AA, and n sub-pixels SP can form one pixel PX. In each of the multiple sub-pixels SP, a light-emitting element, a thin-film transistor for driving the light-emitting element, etc., can be provided. The number of light-emitting elements can be varied depending on the type of the display panel PN. For example, when the display panel PN is an inorganic light-emitting display panel, the light-emitting elements can be light-emitting elements (LEDs) or micro-light-emitting elements (micro-LEDs).

[0063] Within the display area AA, multiple signal lines are provided for sending various signals to multiple sub-pixels SP. For example, the multiple signal lines may include multiple data lines DL providing data voltage to each of the multiple sub-pixels SP, and multiple scan lines SL providing gating voltage to each of the multiple sub-pixels SP. The multiple scan lines SL may extend in one direction within the display area AA and connect to the multiple sub-pixels SP, while the multiple data lines DL may extend in the display area AA in a direction different from that direction and connect to the multiple sub-pixels SP. Furthermore, low-potential power lines, high-potential power lines, etc., may also be configured within the display area AA, but the area is not limited to these.

[0064] The non-display area NA is the region where no image is displayed, and can be defined as an area extending from the display area AA. Within the non-display area NA, link lines and pad electrodes for sending signals to the sub-pixels SP of the display area AA can be provided, or driver ICs such as gating driver ICs or data driver ICs can be provided. The non-display area NA can be located on the rear surface of the display panel PN (i.e., the surface on which no sub-pixels SP are disposed), or it can be omitted, and is not limited to what is shown in the figures.

[0065] Furthermore, drivers such as the gating driver GD, data driver DD, and timing controller TC can be connected to the display panel PN in various ways. For example, the gating driver GD can be installed in the non-display area NA in a gated-in-panel (GIP) manner, or between multiple sub-pixels SP in the display area AA in a gated-in-display-area (GIA) manner. For example, the data driver DD and timing controller TC are formed in separate flexible films and printed circuit boards, and can be electrically connected to the display panel PN by bonding the flexible film and printed circuit board to pad electrodes formed in the non-display area NA of the display panel PN. If the gating driver GD is installed in a GIP manner, and the data driver DD and timing controller TC send signals to the display panel PN through the pad electrodes of the non-display area NA, it is necessary to ensure the area of ​​the non-display area NA used to set the gating driver GD and the pad electrodes, and the bezel may be enlarged.

[0066] In contrast, when the gate driver GD is mounted in the display area AA in a GIA configuration and forms a side line SRL connecting the signal lines on the front surface of the display panel PN to the pad electrodes on the rear surface of the display panel PN to bond the flexible film and printed circuit board to the rear surface of the display panel PN, the non-display area NA on the front surface of the display panel PN can be minimized or reduced. That is, when the gate driver GD, data driver DD, and timing controller TC are connected to the display panel PN as described above, a zero-bezel configuration with virtually no border can be achieved, and the reference... Figure 2A and Figure 2B Provide a more specific description.

[0067] Figure 2A This is a partial cross-sectional view of a display device according to an exemplary embodiment of the present disclosure. Figure 2B This is a perspective view of a splicing display device according to an exemplary embodiment of the present disclosure.

[0068] In the non-display area NA of the display panel PN, multiple pad electrodes are provided for sending various signals to multiple sub-pixels SP. For example, a first pad electrode PAD1 for sending signals to the multiple sub-pixels SP is provided in the non-display area NA on the front surface of the display panel PN, and a second pad electrode PAD2 electrically connected to driving components such as flexible films and printed circuit boards is provided in the non-display area NA on the rear surface of the display panel PN. In this case, although not shown in the figures, various signal lines (e.g., scan lines SL or data lines DL) connected to the multiple sub-pixels SP extend from the display area AA to the non-display area NA to be electrically connected to the first pad electrode PAD1.

[0069] Furthermore, the side line SRL is disposed along the side surface of the display panel PN. The side line SRL can electrically connect the first pad electrode PAD1 on the front surface of the display panel PN and the second pad electrode PAD2 on the rear surface of the display panel PN. Therefore, signals from the driving components on the rear surface of the display panel PN can be transmitted to multiple sub-pixels SP through the second pad electrode PAD2, the side line SRL, and the first pad electrode PAD1. Thus, a signal transmission path is formed from the front surface to the side and rear surfaces of the display panel PN to minimize or reduce the area of ​​the non-display area NA of the display panel PN.

[0070] In addition, refer to Figure 2B A large-screen splicing display device TD can be realized by connecting multiple display devices 100. In this case, when using, for example... Figure 2A When the display device 100 with minimized bezel is used to implement the splicing display device TD, the seam area where the image is not displayed between the display devices 100 is minimized or reduced, thereby improving the display quality.

[0071] For example, multiple sub-pixels SP can form a pixel PX, and the distance D1 between the outermost pixel PX of one display device 100 and the outermost pixel PX of another display device 100 adjacent to one display device 100 can be implemented as equal to the distance D1 between pixels PX in one display device 100. Therefore, the distance between pixels PX between display devices 100 and display devices 100 is constantly configured to minimize or reduce the seam area.

[0072] However, Figure 2A and Figure 2B This is illustrative so that the display device 100 according to an exemplary embodiment of the present disclosure may be a general display device with a bezel, but is not limited thereto.

[0073] Figure 3 This is a circuit diagram of a sub-pixel of a display device according to an exemplary embodiment of the present disclosure.

[0074] Reference Figure 3 According to an exemplary embodiment of the present disclosure, the sub-pixel circuit disposed in each of a plurality of sub-pixels SP in the display device 100 may include a plurality of light-emitting elements LED, a driving transistor DT, a switching transistor ST, and a capacitor Cst.

[0075] Furthermore, in an N-type transistor, since the charge carriers are electrons, electrons can flow from the source electrode to the drain electrode, and current can flow from the drain electrode to the source electrode. In a P-type transistor, since the charge carriers are holes, holes can flow from the source electrode to the drain electrode, and current can flow from the source electrode to the drain electrode. For example, some of a plurality of transistors may be N-type transistors, and others may be P-type transistors. In the following description, it will be assumed that both the driving transistor DT and the switching transistor ST are P-type transistors, but this disclosure is not limited thereto.

[0076] The driving transistor DT can control the driving current applied to the light-emitting element LED based on the source-gate voltage. The driving transistor DT may include a gate electrode connected to the drain of the switching transistor ST, a source electrode connected to a high-potential power line supplied with a high-potential power supply voltage VDD, and a drain electrode connected to the anode of the first light-emitting element LED1 among a plurality of light-emitting elements LED.

[0077] A switching transistor ST can apply a data voltage Vdata from the data line DL to the first node N1. The switching transistor ST may include a gate electrode connected to the scan line SL, a source electrode connected to the data line DL, and a drain electrode connected to the first node N1. Therefore, the switching transistor ST can apply the data voltage Vdata from the data line DL to the first node N1 in response to the scan signal SCAN.

[0078] The capacitor Cst may include a first electrode connected to a first node N1 and a second electrode connected to a second node N2. That is, the first electrode of the capacitor Cst is connected to the gate electrode of the driving transistor DT, and the second electrode of the capacitor Cst is connected to the source electrode of the driving transistor DT. Therefore, the capacitor Cst maintains the potential difference between the gate electrode and the source electrode of the driving transistor DT while the light-emitting element LED emits light, thereby providing a constant driving current to the light-emitting element LED.

[0079] Multiple light-emitting elements (LEDs) may include a first light-emitting element (LED1) and a second light-emitting element (LED2) that emit light of the same color.

[0080] The first light-emitting element LED1 may include an anode connected to the drain electrode of the driving transistor DT and a cathode connected to the anode electrode of the second light-emitting element LED2. The first light-emitting element LED1 can emit light by receiving a driving current from the driving transistor DT.

[0081] The second light-emitting element LED2 can be connected in series with the first light-emitting element LED1. The second light-emitting element LED2 may include an anode connected to the cathode electrode of the first light-emitting element LED1 and a cathode electrode connected to a low-potential power line supplied with a low-potential power supply voltage VSS. The second light-emitting element LED2 can emit light by receiving a drive current from the drive transistor DT via the first light-emitting element LED1.

[0082] Furthermore, despite Figure 3 In this example, the subpixel circuit is illustrated as a 2T1C structure comprising two transistors and a capacitor, but the subpixel circuit can be configured in a 3T1C or 8T3C structure, but is not limited thereto.

[0083] Figure 4 This is a plan view of the sub-pixels of a display device according to an exemplary embodiment of the present disclosure. Figure 5A It is along Figure 3 A cross-sectional view taken by line Va-Va'. Figure 5B It is along Figure 3 A cross-sectional view of the line Vb-Vb'.

[0084] First, refer to Figure 5A and Figure 5B The substrate 110 is a component used to support various components included in the display device 100, and may be made of an insulating material. For example, the substrate 110 may be made of glass, resin, etc. Alternatively, the substrate 110 may include polymers or plastics, or may be made of a flexible material.

[0085] A light-shielding layer LS can be disposed in each of the plurality of sub-pixels SP on the substrate 110. The light-shielding layer LS blocks light incident from the lower portion of the substrate 110 onto the active layer ACT of the driving transistor DT, which will be described below. The light incident onto the active layer ACT of the driving transistor DT is blocked by the light-shielding layer LS to minimize or reduce leakage current.

[0086] A buffer layer 111 may be disposed on the substrate 110 and the light-shielding layer LS. The buffer layer 111 can reduce the penetration of moisture or impurities through the substrate 110. For example, the buffer layer 111 may be configured as a single layer or multiple layers made of silicon oxide (SiOx) or silicon nitride (SiNx). However, this specification is not limited thereto.

[0087] The driving transistor DT can be disposed on the buffer layer 111. The driving transistor DT includes an active layer ACT, a gate electrode GE, a source electrode SE, and a drain electrode DE.

[0088] The active layer ACT can be disposed on the buffer layer 111. The active layer ACT can be formed of a semiconductor material such as oxide semiconductor, amorphous silicon or polycrystalline silicon, but is not limited thereto.

[0089] The gate insulating layer 112 may be disposed on the active layer ACT. The gate insulating layer 112 is an insulating layer that insulates the active layer ACT from the gate electrode GE, and may be composed of a single layer or a double layer of silicon oxide (SiOx) or silicon nitride (SiNx), but is not limited thereto.

[0090] The gate electrode GE can be disposed on the gate insulating layer 112. The gate electrode GE can be made of a conductive material such as copper (Cu), aluminum (Al), molybdenum (Mo), nickel (Ni), titanium (Ti), chromium (Cr) or alloys thereof, but is not limited thereto.

[0091] Interlayer insulating layer 113 may be disposed on gate electrode GE. Contact holes are formed in interlayer insulating layer 113 to connect source electrode SE and drain electrode DE to active layer ACT. Interlayer insulating layer 113 is an insulating layer that protects the components below interlayer insulating layer 113, and may be composed of a single layer or a double layer of silicon oxide (SiOx) or silicon nitride (SiNx), but is not limited thereto.

[0092] The source electrode SE and drain electrode DE, which are electrically connected to the active layer ACT, can be disposed on the interlayer insulating layer 113. The source electrode SE and drain electrode DE can be made of conductive materials such as copper (Cu), aluminum (Al), molybdenum (Mo), nickel (Ni), titanium (Ti), chromium (Cr), or alloys thereof, but are not limited thereto.

[0093] Furthermore, this disclosure describes the provision of an insulating layer between the gate electrode GE and the source electrode SE and drain electrode DE. However, multiple insulating layers may be provided between the gate electrode GE and the source electrode SE and drain electrode DE, but this is not a limitation.

[0094] An auxiliary electrode LE can be disposed on the gate insulating layer 112. The auxiliary electrode LE is an electrode that electrically connects the light-shielding layer LS below the buffer layer 111 to either the source electrode SE or the drain electrode DE on the interlayer insulating layer 113. For example, the light-shielding layer LS can be electrically connected to either the source electrode SE or the drain electrode DE via the auxiliary electrode LE to operate as a floating gate. Therefore, the threshold voltage fluctuation of the driving transistor DT caused by the floating light-shielding layer LS can be minimized or reduced.

[0095] The power line VL can be disposed on the interlayer insulating layer 113. The power line VL, together with the driving transistor DT, is electrically connected to the light-emitting element LED to allow the LED to emit light. The power line VL can be a low-potential power line providing a low-potential supply voltage VSS, but is not limited thereto, and can also be a high-potential power line providing a high-potential supply voltage VDD. The power line VL can be made of a conductive material such as copper (Cu), aluminum (Al), molybdenum (Mo), nickel (Ni), titanium (Ti), chromium (Cr), or alloys thereof, but is not limited thereto.

[0096] A conductive layer CL can be disposed on the interlayer insulating layer 113. The conductive layer CL can connect the gate electrode GE of the driving transistor DT to another electrode. For example, the conductive layer CL can connect the gate electrode GE of the driving transistor DT to the drain electrode of the switching transistor ST, but is not limited thereto. The conductive layer CL can be made of a conductive material such as copper (Cu), aluminum (Al), molybdenum (Mo), nickel (Ni), titanium (Ti), chromium (Cr), or alloys thereof, but is not limited thereto.

[0097] Refer to together Figures 4 to 5B The first repair electrode REPE1 and the second repair electrode REPE2 can be disposed on the interlayer insulating layer 113. The first repair electrode REPE1 and the second repair electrode REPE2 are connected to the shared electrode SHE connecting the first light-emitting element LED1 and the second light-emitting element LED2 to form a circuitous path for the current driving the transistor DT or the power line VL. Therefore, even if either the first light-emitting element LED1 or the second light-emitting element LED2 connected in series is defective, the remaining light-emitting element can be driven normally. The first repair electrode REPE1 and the second repair electrode REPE2 can be formed on the same layer as the source electrode SE and the drain electrode DE, and can be formed from the same material, but are not limited thereto. The first repair electrode REPE1 and the second repair electrode REPE2 can be arranged to be spaced apart from each other, but are not limited thereto.

[0098] When both the first light-emitting element LED1 and the second light-emitting element LED2 are functioning normally, the first light-emitting element LED1, which is connected in series with the second light-emitting element LED2, provides the driving current of the driving transistor DT to the second light-emitting element LED2. Similarly, the second light-emitting element LED2 provides the power line VL to the first light-emitting element LED1.

[0099] At this time, when the first light-emitting element LED1 is defective, the driving current of the driving transistor DT is not supplied through the first light-emitting element LED1 to the second light-emitting element LED2, which is connected in series with the first light-emitting element LED1. Therefore, even if the second light-emitting element LED2 is normal, the second light-emitting element LED2 may not be turned on. Therefore, when the first light-emitting element LED1 is defective, the first repair electrode REPE1 can be connected to the first reflective electrode RE1 and the shared electrode SHE to form a current path between the second light-emitting element LED2 and the driving transistor DT.

[0100] For example, the first repair electrode REPE1 can be disposed between the first reflective electrode RE1 and the shared electrode SHE. In this case, at least a portion of the first repair electrode REPE1 can be configured to overlap with the first reflective electrode RE1 and the shared electrode SHE. Therefore, when the first light-emitting element LED1 is defective, a welding process can be performed by irradiating the overlap point between the first reflective electrode RE1 and the first repair electrode REPE1 and by irradiating the overlap point between the shared electrode SHE and the first repair electrode REPE1 with an irradiation laser, so that the first repair electrode REPE1 contacts the first reflective electrode RE1 and the shared electrode SHE. Therefore, the first reflective electrode RE1 and the shared electrode SHE can be connected to each other through the first repair electrode REPE1. Therefore, the second light-emitting element LED2 can be connected to the driving transistor DT through the shared electrode SHE, the first repair electrode REPE1, and the first reflective electrode RE1. Therefore, even if the first light-emitting element LED1 is defective, the second light-emitting element LED2 can be normally turned on by receiving the driving current of the driving transistor DT.

[0101] Furthermore, the shared electrode SHE connected to the first electrode 124 of the first light-emitting element LED1 and the first reflective electrode RE1 connected to the second electrode 125 of the first light-emitting element LED1 are connected to each other by a welding process. Therefore, the same voltage is applied to the first electrode 124 and the second electrode 125 of the first light-emitting element LED1 to completely darken the first light-emitting element LED1.

[0102] In contrast, when the first light-emitting element LED1 is functioning normally, the first repair electrode REPE1 can be in a floating state that is not connected to any other electrodes, including the first reflective electrode RE1 and the shared electrode SHE.

[0103] When the second light-emitting element LED2 is defective, the power current of the power line VL is not supplied through LED2 to the first light-emitting element LED1, which is connected in series with LED2. Therefore, even if the first light-emitting element LED1 is normal, it may not be turned on. Therefore, when the second light-emitting element LED2 is defective, the second repair electrode REPE2 can be connected to the second reflective electrode RE2 and the shared electrode SHE to form a current path between the first light-emitting element LED1 and the power line VL.

[0104] For example, the second repair electrode REPE2 can be disposed between the shared electrode SHE and the second reflective electrode RE2. In this case, at least a portion of the second repair electrode REPE2 can be configured to overlap with the shared electrode SHE and the second reflective electrode RE2. Therefore, when the second light-emitting element LED2 is defective, a welding process can be performed by irradiating the overlap points of the shared electrode SHE and the second repair electrode REPE2, as well as the overlap points of the second reflective electrode RE2 and the second repair electrode REPE2, with a laser beam to allow the second repair electrode REPE2 to contact the second reflective electrode RE2 and the shared electrode SHE. Therefore, the second reflective electrode RE2 and the shared electrode SHE can be connected to each other through the second repair electrode REPE2. Therefore, the first light-emitting element LED1 can be connected to the power line VL through the shared electrode SHE, the second repair electrode REPE2, and the second reflective electrode RE2. Therefore, even if the second light-emitting element LED2 is defective, the first light-emitting element LED1 can be normally turned on by receiving the power current from the power line VL.

[0105] Furthermore, the second reflective electrode RE2, connected to the first electrode 134 of the second light-emitting element LED2, and the shared electrode SHE, connected to the second electrode 135 of the second light-emitting element LED2, are connected to each other by a welding process. Therefore, the same voltage is applied to both the first electrode 134 and the second electrode 135 of the second light-emitting element LED2 to completely dim the second light-emitting element LED2.

[0106] In contrast, when the second light-emitting element LED2 is functioning normally, the second repair electrode REPE2 can be in a floating state that is not connected to any other electrodes, including the second reflective electrode RE2 and the shared electrode SHE.

[0107] For example, the first repair electrode REPE1 and the second repair electrode REPE2 may be disposed on the same layer as the source electrode SE and drain electrode DE of the driving transistor DT, and may be made of the same material as the source electrode SE and drain electrode DE of the driving transistor DT, but are not limited thereto.

[0108] In addition, in order to prevent the driving transistor DT, which is disposed on the same layer, from being well connected together during the soldering process of the first repair electrode REPE1 and the second repair electrode REPE2, the first repair electrode REPE1 and the second repair electrode REPE2 can be configured not to overlap with the driving transistor DT, but are not limited thereto.

[0109] The following will refer to Figures 6 to 9 The specific description describes a method for repairing LED light-emitting elements using a welding process involving a first repair electrode REPE1 and a second repair electrode REPE2.

[0110] Passivation layer 114 can be disposed on the first repair electrode REPE1, the second repair electrode REPE2, the conductive layer CL, the driving transistor DT, and the power line VL. Passivation layer 114 can protect the conductive layer CL, the driving transistor DT, and the power line VL from the penetration of moisture or impurities. For example, passivation layer 114 can be configured as a single layer or multiple layers made of silicon oxide (SiOx) or silicon nitride (SiNx). However, this specification is not limited thereto.

[0111] The first planarization layer 115 may be disposed on the passivation layer 114. The first planarization layer 115 can planarize the upper portion of the substrate 110 on which the driving transistor DT is disposed. The first planarization layer 115 may be composed of a single layer or a double layer, and may be formed, for example, by a photoresist or an acrylic-based organic material, but is not limited thereto, and may be composed of an inorganic material including silicon, such as silicon oxide (SiOx) or silicon nitride (SiNx).

[0112] A first reflective electrode RE1 and a second reflective electrode RE2, spaced apart from each other, can be disposed on the first planarization layer 115. The first reflective electrode RE1 and the second reflective electrode RE2 electrically connect the light-emitting element (LED) to the power line VL and the driving transistor DT, and simultaneously serve as reflectors that reflect light emitted from the LED to the upper portion of the LED. The first reflective electrode RE1 and the second reflective electrode RE2 are formed of a conductive material with excellent reflective properties to reflect light emitted from the LED toward the upper portion of the LED.

[0113] The first reflective electrode RE1 can be electrically connected to the driving transistor DT and the first light-emitting element LED1. The first reflective electrode RE1 can be connected to the drain electrode DE of the driving transistor DT through contact holes formed in the passivation layer 114 and the first planarization layer 115. In addition, the first reflective electrode RE1 can be electrically connected to the second electrode 125 of the first light-emitting element LED1 through the first connection electrode CE1.

[0114] The second reflective electrode RE2 can be electrically connected to the power line VL and the second light-emitting element LED2. The second reflective electrode RE2 can be connected to the power line VL through contact holes formed in the passivation layer 114 and the first planarization layer 115, and can be electrically connected to the first electrode 134 of the second light-emitting element LED through the bonding layer BDL described below.

[0115] A shared electrode SHE can be disposed on the first planarization layer 115, spaced apart from the first reflective electrode RE1 and the second reflective electrode RE2. For example, the shared electrode SHE can be disposed between the first reflective electrode RE1 and the second reflective electrode RE2. The shared electrode SHE can electrically connect the first light-emitting element LED1 and the second light-emitting element LED2. For example, the shared electrode SHE can be connected to the first light-emitting element LED1 via a bonding layer BDL disposed on the shared electrode SHE. For example, the shared electrode SHE can be connected to the first electrode 124 of the first light-emitting element LED1. Furthermore, the shared electrode SHE can be connected to the second electrode 135 of the second light-emitting element LED2 via a second connection electrode CE2, as described below.

[0116] The shared electrode SHE can be disposed on the same layer as the first reflective electrode RE1 and the second reflective electrode RE2, using the same material. Therefore, similar to the first reflective electrode RE1 and the second reflective electrode RE2, the shared electrode SHE is formed of a conductive material with excellent reflective properties to reflect light emitted from the light-emitting element LED to the upper part of the light-emitting element LED, but is not limited thereto.

[0117] Multiple bonding layers BDL can be respectively disposed on the shared electrode SHE and the second reflective electrode RE2. The bonding layers BDL can be fixedly disposed on the light-emitting element LED on the shared electrode SHE and the second reflective electrode RE2. The bonding layers BDL can be formed of conductive material to electrically connect the shared electrode SHE and the first electrode 124 of the first light-emitting element LED1 and the first electrode 134 of the second reflective electrode RE2 and the second light-emitting element LED2, but are not limited thereto.

[0118] Multiple light-emitting elements (LEDs) can be disposed on multiple bonding layers (BDLs). These LEDs are light-emitting elements powered by electric current, and may include LEDs emitting red, green, and blue light, and can be combined to achieve various colored lights, including white light. For example, the LEDs can be microLEDs, but are not limited to this.

[0119] Multiple light-emitting elements (LEDs) may include a first light-emitting element (LED1) and a second light-emitting element (LED2) connected in series. The first light-emitting element (LED1) and the second light-emitting element (LED2) can emit light of the same color.

[0120] For example, the first light-emitting element LED1 can be disposed on the bonding layer BDL disposed on the shared electrode SHE, and the second light-emitting element LED2 can be disposed on the bonding layer BDL disposed on the second reflective electrode RE2. Therefore, the first light-emitting element LED1 can be electrically connected to the shared electrode SHE through the bonding layer BDL, and the second light-emitting element LED2 can be electrically connected to the second reflective electrode RE2 through the bonding layer BDL.

[0121] The first light-emitting element LED1 may include a first semiconductor layer 121, a light-emitting layer 122, a second semiconductor layer 123, a first electrode 124, a second electrode 125, and a passivation film 126. Specifically, the first electrode 124 may be disposed on a bonding layer BDL disposed on a shared electrode SHE. The first electrode 124 is an electrode for electrically connecting the second electrode 135 of the second light-emitting element LED2 and the first semiconductor layer 121 through the bonding layer BDL, the shared electrode SHE, and the second connecting electrode CE2. In this case, the first semiconductor layer 121 may be a semiconductor layer doped with n-type impurities, and the first electrode 124 may be a cathode. The first electrode 124 may be made of a conductive material (e.g., a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO), or an opaque conductive material such as titanium (Ti), gold (Au), silver (Ag), copper (Cu), or alloys thereof), but is not limited thereto.

[0122] A first semiconductor layer 121 may be disposed on the first electrode 124. A first semiconductor layer 121 may be disposed, and a second semiconductor layer 123 may be disposed on the first semiconductor layer 121. The first semiconductor layer 121 and the second semiconductor layer 123 may be layers formed by doping an n-type impurity or a p-type impurity into a specific material. For example, each of the first semiconductor layer 121 and the second semiconductor layer 123 may be a layer doped with both n-type and p-type impurities in a material such as gallium nitride (GaN), indium aluminum phosphide (InAlP), or gallium arsenide (GaAs).

[0123] The light-emitting layer 122 can be disposed between the first semiconductor layer 121 and the second semiconductor layer 123. The light-emitting layer 122 can receive holes and electrons from the first semiconductor layer 121 and the second semiconductor layer 123 to emit light.

[0124] The second electrode 125 can be disposed on the second semiconductor layer 123. The second electrode 125 is an electrode that electrically connects the driving transistor DT and the second semiconductor layer 123. In this case, the second semiconductor layer 123 can be a semiconductor layer doped with p-type impurities, and the second electrode 125 can be an anode. The second electrode 125 can be made of a conductive material (e.g., a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO), or an opaque conductive material such as titanium (Ti), gold (Au), silver (Ag), copper (Cu), or alloys thereof), but is not limited thereto.

[0125] Next, the passivation film 126 can be configured to surround the first semiconductor layer 121, the light-emitting layer 122, the second semiconductor layer 123, and the second electrode 125. The passivation film 126 can be formed of an insulating material to protect the first semiconductor layer 121, the light-emitting layer 122, and the second semiconductor layer 123.

[0126] also, Figure 5A The passivation film 126 is illustrated as being spaced apart from the second electrode 125. However, this disclosure is not limited thereto. The passivation film 126 may be configured to cover and surround a portion of the top and side surfaces of the second electrode 125, but is not limited to the passivation film shown in the figure.

[0127] Similar to the first light-emitting element LED1, the second light-emitting element LED2 may include a first semiconductor layer 131, a light-emitting layer 132, a second semiconductor layer 133, a first electrode 134, a second electrode 135, and a passivation film 136. The shape and arrangement of each component of the second light-emitting element LED2 may be substantially the same as those of the first light-emitting element LED1, therefore, redundant descriptions will be omitted.

[0128] The second planarization layer 116 can be configured to surround a plurality of light-emitting elements (LEDs). The second planarization layer 116 can fix and protect the plurality of light-emitting elements (LEDs). Furthermore, the second planarization layer 116 can be configured to expose the second electrode 125 of the first light-emitting element LED1 and the second electrode 135 of the second light-emitting element LED2, and electrically connect the first connecting electrode CE1 and the second connecting electrode CE2, respectively, as will be described below.

[0129] The second planarization layer 116 can be configured as a single layer or multiple layers, and is made, for example, of benzocyclobutene (BCB) or an acrylic-based organic material. However, this disclosure is not limited thereto.

[0130] The first connecting electrode CE1 and the second connecting electrode CE2 can be positioned spaced apart from each other on the second planarization layer 116. The first connecting electrode CE1 is an electrode used for electrically connecting the first light-emitting element LED1 and the driving transistor DT. The first connecting electrode CE1 can be connected to the first reflective electrode RE1 through a contact hole formed in the second planarization layer 116. Therefore, the first connecting electrode CE1 can be connected to the driving transistor DT through the first reflective electrode RE1. For example, the first connecting electrode CE1 can be connected to the second electrode 125 of the first light-emitting element LED1 and the drain electrode DE of the driving transistor DT, but is not limited thereto.

[0131] The second connecting electrode CE2 is an electrode used to electrically connect the second light-emitting element LED2 to the shared electrode SHE. The second connecting electrode CE2 can be connected to the shared electrode SHE through a contact hole formed in the second planarization layer 116. Therefore, the second connecting electrode CE2 can connect the second electrode 135 of the second light-emitting element LED2 to the shared electrode SHE, but is not limited thereto.

[0132] Figure 6 This is a plan view of the sub-pixels of a display device according to an exemplary embodiment of the present disclosure. Figure 7 It is along Figure 6 The cross-sectional view taken from line VII-VII'. Figure 8 This is a plan view of the sub-pixels of a display device according to an exemplary embodiment of the present disclosure. Figure 9 It is along Figure 8 The cross-sectional view taken by line IX-IX'. Specifically, Figure 6 and Figure 7 This diagram illustrates a repair method for a defective second light-emitting element (LED2) among multiple LED light-emitting elements. Figure 8 and Figure 9 This diagram illustrates a repair method for a defective first light-emitting element (LED1) among multiple light-emitting elements (LEDs).

[0133] In a display device 100 according to an exemplary embodiment of the present disclosure, when any one of the plurality of light-emitting elements LEDs is defective, a welding process is performed on a shared electrode SHE that connects the plurality of light-emitting elements LEDs and a first reflective electrode RE1 or a second reflective electrode RE2 to drive the other normally, thereby minimizing or reducing the defect in which the corresponding sub-pixel SP is completely darkened.

[0134] Furthermore, since the probability that both the first light-emitting element LED1 and the second light-emitting element LED2 are defective is very low, it will be assumed and described below that if one of the light-emitting elements LED is found to be defective, the other is normal, and therefore light emission testing for the other is unnecessary.

[0135] First, refer to Figure 6 and Figure 7 The luminescence test of the second light-emitting element LED2 can be performed before the processes of forming the second planarization layer 116, the first connecting electrode CE1, and the second connecting electrode CE2. Since the first electrode 134 of the second light-emitting element LED2 is connected to the power line VL via the second reflective electrode RE2, the luminescence test can be performed by applying a luminescence test signal to the second electrode 135 via the power line VL and by applying a probe to the second electrode 135. When the second light-emitting element LED2 is found to be defective as a result of the luminescence test, a welding process can be performed by irradiating the overlap points of the shared electrode SHE and the second repair electrode REPE2, as well as the overlap points of the second reflective electrode RE2 and the second repair electrode REPE2, with a laser beam, so that the second repair electrode REPE2 can contact the second reflective electrode RE2 and the shared electrode SHE.

[0136] Specifically, refer to Figure 7 When the shared electrode SHE and the second reflective electrode RE2 are irradiated with a laser beam, the passivation layer 114 and the first planarization layer 115 between the shared electrode SHE, the second reflective electrode RE2 and the second repair electrode REPE2 can open, and a portion of the shared electrode SHE and the second reflective electrode RE2 can be melted, and the shared electrode SHE and the second reflective electrode RE2 can be connected to the second repair electrode REPE2.

[0137] Therefore, the second reflective electrode RE2 and the shared electrode SHE can be electrically connected through the second repair electrode REPE2. Thus, the second reflective electrode RE2, connected to the first electrode 134 of the second light-emitting element LED2, and the shared electrode SHE, connected to the second electrode 135 of the second light-emitting element LED2, are connected to each other so that the same voltage is applied to both the first electrode 134 and the second electrode 135 of the second light-emitting element LED2. Therefore, the second light-emitting element LED2 can be completely dimmed.

[0138] Subsequently, a second planarization layer 116, a first connecting electrode CE1, and a second connecting electrode CE2 are formed to connect only the first light-emitting element LED1. For example, when both the first light-emitting element LED1 and the second light-emitting element LED2 are functioning normally, the first light-emitting element LED1 is connected to the power line VL through the second light-emitting element LED2. However, since the shared electrode SHE is connected to the second reflective electrode RE2 via the second repair electrode REPE2 during the soldering process, the first light-emitting element LED1 can be connected to the power line VL through the shared electrode SHE, the second repair electrode REPE2, and the second reflective electrode RE2. That is, even if the second light-emitting element LED2, which is connected in series with the first light-emitting element LED1, is defective, a current path between the first light-emitting element LED1 and the power line VL can still be formed through the shared electrode SHE and the second repair electrode REPE2. Therefore, even if the current detour to the first light-emitting element LED1 and the second light-emitting element LED2, which is connected in series with the first light-emitting element LED1, is defective, the first light-emitting element LED1 can still be driven normally.

[0139] In this case, since the first light-emitting element LED1 is normal, the first repair electrode REPE1 can be in a floating state not connected to any other electrodes including the first reflective electrode RE1 and the shared electrode SHE.

[0140] Furthermore, although not illustrated in the accompanying drawings, when the second light-emitting element LED2 is defective, a repair method can be used to remove the defective second light-emitting element LED2 and then transfer a new second light-emitting element LED2, instead of the welding process of the shared electrode SHE and the second reflective electrode RE2. For example, the second light-emitting element LED2 can be removed together with the bonding layer BDL disposed below the second light-emitting element LED2 by using a laser beam to irradiate it. Subsequently, a new bonding layer BDL and a new second light-emitting element LED2 can be transferred to the second reflective electrode RE2, but this is not a limitation.

[0141] Reference Figure 8 and Figure 9 As described above, since the results of the light emission test of the second light emission element LED2 show that there are significantly fewer cases where both the first light emission element LED1 and the second light emission element LED2 are defective, the light emission test of the first light emission element LED1 can be performed only when the second light emission element LED2 is normal.

[0142] Unlike the light emission test of the second light-emitting element LED2, the light emission test of the first light-emitting element LED1 can be performed after the light emission test of the second light-emitting element LED2 and after the second planarization layer 116, the first connecting electrode CE1 and the second connecting electrode CE2 have all been formed.

[0143] As a result of the illumination inspection of the first light-emitting element LED1, a welding process can be performed by irradiating the overlap point between the first reflective electrode RE1 and the first repair electrode REPE1 and the overlap point between the shared electrode SHE and the first repair electrode REPE1, so that the first repair electrode REPE1 contacts the first reflective electrode RE1 and the shared electrode SHE.

[0144] Specifically, refer to Figure 9 When the shared electrode SHE and the first reflective electrode RE1 are irradiated with a laser beam, the second planarization layer 116 disposed on the shared electrode SHE and the first reflective electrode RE1, as well as the passivation layer 114 and the first planarization layer 115 between the shared electrode SHE and the first reflective electrode RE1 and the first repair electrode REPE1, can be opened, a portion of the shared electrode SHE and the first reflective electrode RE1 can be melted, and the shared electrode SHE and the first reflective electrode RE1 can be connected to the first repair electrode REPE1. Figure 9 An example is shown where the second planarization layer 116 is opened by laser irradiation, but it is not limited thereto. The second planarization layer 116 is not opened and remains in contact with... Figure 7 The same shape is present, and the passivation layer 114 and the first planarization layer 115 between the shared electrode SHE and the first reflective electrode RE1 and the first repair electrode REPE1 are opened so that the shared electrode SHE and the first reflective electrode RE1 can be connected to the first repair electrode REPE1.

[0145] Therefore, the first reflective electrode RE1 and the shared electrode SHE can be connected to each other through the first repair electrode REPE1. Thus, the shared electrode SHE connected to the first electrode 124 of the first light-emitting element LED1 and the first reflective electrode RE1 connected to the second electrode 125 of the first light-emitting element LED1 are connected to each other, such that the same voltage is applied to the first electrode 124 and the second electrode 125 of the first light-emitting element LED1, so that the first light-emitting element LED1 can be completely dimmed.

[0146] Therefore, only the second light-emitting element LED2 can be turned on. For example, when both the first light-emitting element LED1 and the second light-emitting element LED2 are functioning normally, the second light-emitting element LED2 is connected to the driving transistor DT through the first light-emitting element LED1. However, since the shared electrode SHE is connected to the first reflective electrode RE1 through the first repair electrode REPE1, the second light-emitting element LED2 can be connected to the driving transistor DT through the shared electrode SHE, the first repair electrode REPE1, and the first reflective electrode RE1. That is, a current path between the second light-emitting element LED2 and the driving transistor DT can be formed through the shared electrode SHE and the first repair electrode REPE1. Therefore, even if the driving current detours to the second light-emitting element LED2, and the first light-emitting element LED1, which is connected in series with the second light-emitting element LED2, is defective, the second light-emitting element LED2 can still be driven normally.

[0147] In this case, since the second light-emitting element LED2 is normal, the second repair electrode REPE2 can be in a floating state that is not connected to any other electrodes, including the second reflective electrode RE2 and the shared electrode SHE.

[0148] Furthermore, since the light emission test of the first light-emitting element LED1 is performed after the formation of the first connecting electrode CE1 and the second connecting electrode CE2, it may be difficult to use the repair method of removing the defective first light-emitting element LED1 and transferring a new first light-emitting element LED1 when the first light-emitting element LED1 is defective, but it is not limited to this.

[0149] Figures 10A to 10C This is a plan view of the pixels of a display device according to an exemplary embodiment of the present disclosure. Figures 10A to 10C It is used for explanation Figures 1 to 9 The series connection structure of the light-emitting element LED and the repair structure using the first repair electrode REPE1 and the second repair electrode REPE2 can be selectively applied to some sub-pixel SP patterns. For example, as Figure 10A As shown, the series connection structure of the light-emitting element LED and the repair structure using the first repair electrode REPE1 and the second repair electrode REPE2 are applied only to all sub-pixels SP of pixel PXa, the red sub-pixel RSP of pixel PXb, and the green sub-pixel GSP of pixel PXc.

[0150] Reference Figures 10A to 10C Pixels PXa, PXb, and PXc may include a red sub-pixel RSP configured to emit red light, a green sub-pixel GSP configured to emit green light, and a blue sub-pixel BSP configured to emit blue light.

[0151] Reference Figures 10A to 10CMultiple red light-emitting elements RLED1 and RLED2 can be disposed in the red sub-pixel RSP of each of pixels PXa, PXb, and PXc. For example, a first red light-emitting element RLED1 and a second red light-emitting element RLED2 connected in series can be disposed in the red sub-pixel RSP. Typically, red light-emitting elements RLED1 and RLED2 have higher power consumption than green light-emitting elements GLED, GLED1, and GLED2 and blue light-emitting elements BLED, BLED1, and BLED2. Therefore, a first red light-emitting element RLED1 and a second red light-emitting element RLED2 connected in series are disposed in the red sub-pixel RSP to reduce power consumption.

[0152] Reference Figure 10A and Figure 10B Multiple green light-emitting elements GLED1 and GLED2 can be set in the green sub-pixel GSP. For example, a first green light-emitting element GLED1 and a second green light-emitting element GLED2 connected in series can be set in the green sub-pixel GSP. Since the green light-emitting elements GLED, GLED1, and GLED2 have higher power consumption than the blue light-emitting elements BLED, BLED1, and BLED2, the first green light-emitting element GLED1 and the second green light-emitting element GLED2 connected in series are set in the green sub-pixel GSP to reduce power consumption.

[0153] However, this disclosure is not limited thereto. (See also...) Figure 10C A green light-emitting element (GLED) can be set in the green sub-pixel GSP. When only one green light-emitting element (GLED) is set as described above, the green light-emitting element (GLED) can be set on the second reflective electrode RE2, and the shared electrode SHE, the first repair electrode REPE1, and the second repair electrode REPE2 can be omitted. Therefore, only one connecting electrode CE is set to connect the first reflective electrode RE1 and the green light-emitting element (GLED), but it is not limited to this.

[0154] Reference Figure 10A Multiple blue light-emitting elements BLED1 and BLED2 can be arranged in the blue sub-pixel BSP. For example, a first blue light-emitting element BLED1 and a second blue light-emitting element BLED2 connected in series can be arranged in the blue sub-pixel BSP. Therefore, arranging the first blue light-emitting element BLED1 and the second blue light-emitting element BLED2 connected in series reduces power consumption.

[0155] However, this disclosure is not limited thereto. (See also...) Figure 10B and Figure 10CThe blue light-emitting element (BLED) has better power efficiency than the red light-emitting elements (RLED1 and RLED2) and the green light-emitting elements (GLED, GLED1 and GLED2) mentioned above. Therefore, one blue light-emitting element (BLED) can be set in the blue sub-pixel (BSP). When only one blue light-emitting element (BLED) is set as described above, the blue light-emitting element (BLED) can be set on the second reflective electrode (RE2), and the shared electrode (SHE), the first repair electrode (REPE1), and the second repair electrode (REPE2) can be omitted. Therefore, only one connecting electrode (CE) is set to connect the first reflective electrode (RE1) and the blue light-emitting element (BLED), but it is not limited to this.

[0156] That is, refer to Figures 10A to 10C Considering the power efficiency of each sub-pixel SP, the series-connected light-emitting elements (LEDs) can be disposed only in some sub-pixel SPs. However, this disclosure is not limited thereto. The series connection structure of the light-emitting elements (LEDs) and the repair structure through the shared electrode SHE and the first repair electrode REPE1 and the second repair electrode REPE2 can be applied to all sub-pixel SPs, and these sub-pixel SPs can be designed in various ways considering power consumption and the arrangement of the sub-pixel SPs.

[0157] Various methods are being researched to achieve high-resolution and high-brightness display devices without significantly increasing power consumption. For example, multiple light-emitting elements connected in series to a sub-pixel can be arranged. However, when multiple light-emitting elements are connected in series, if any one of them is defective, it may be difficult to drive the remaining light-emitting elements. Therefore, an efficient arrangement structure that takes into account the repair of light-emitting elements is particularly important.

[0158] In a display device 100 according to an exemplary embodiment of the present disclosure, a first light-emitting element LED1 and a second light-emitting element LED2 connected in series can be disposed in a sub-pixel SP. For example, the first light-emitting element LED1 and the second light-emitting element LED2 can be connected via a shared electrode SHE. Specifically, the second electrode 125 of the first light-emitting element LED1 can be connected to a driving transistor DT, the first electrode 134 of the second light-emitting element LED2 can be connected to a power line VL, and the shared electrode SHE can connect the first electrode 124 of the first light-emitting element LED1 and the second electrode 135 of the second light-emitting element LED2. Therefore, the first light-emitting element LED1 can be connected to the power line VL via the second light-emitting element LED2, and the second light-emitting element LED2 can be connected to the driving transistor DT via the first light-emitting element LED1. As described above, the first light-emitting element LED1 and the second light-emitting element LED2 are connected in series to reduce the current flowing through each sub-pixel SP, thereby reducing power consumption.

[0159] Specifically, in the display device 100 according to an exemplary embodiment of the present disclosure, a shared electrode SHE connecting the first light-emitting element LED1 and the second light-emitting element LED2 is connected to either the first repair electrode REPE1 or the second repair electrode REPE2 to form a circuitous path for the current of the driving transistor DT or the power line VL. Therefore, even if either the first light-emitting element LED1 or the second light-emitting element LED2 connected in series is defective, the remaining light-emitting element can be driven normally. For example, in the display device 100 according to an exemplary embodiment of the present disclosure, when the first light-emitting element LED1 is defective, a soldering process can be performed by irradiating the overlap between the first reflective electrode RE1 and the first repair electrode REPE1, and the overlap between the shared electrode SHE and the first repair electrode REPE1, to connect the first reflective electrode RE1 and the shared electrode SHE to each other via the first repair electrode REPE1. That is, because the shared electrode SHE is connected to the first reflective electrode RE1 via the first repair electrode REPE1, a normal second light-emitting element LED2 can be connected to the driving transistor DT via the shared electrode SHE, the first repair electrode REPE1, and the first reflective electrode RE1. In other words, even if the first light-emitting element LED1, which is connected in series with the second light-emitting element LED2, is defective, a current path between the second light-emitting element LED2 and the driving transistor DT can be formed through the shared electrode SHE and the first repair electrode REPE1. Therefore, the driving current detours to the second light-emitting element LED2, and the second light-emitting element LED2 can be driven normally. Thus, the defect of the sub-pixel SP being completely darkened can be minimized or reduced. Furthermore, the shared electrode SHE connected to the first electrode 124 of the first light-emitting element LED1 and the first reflective electrode RE1 connected to the second electrode 125 of the first light-emitting element LED1 are connected so that the same voltage is applied to the first electrode 124 and the second electrode 125 of the first light-emitting element LED1 to make the first light-emitting element LED1 completely darken.

[0160] Similarly, in the display device 100 according to an exemplary embodiment of the present disclosure, when the second light-emitting element LED2 is defective, a welding process can be performed by irradiating the overlap point between the second reflective electrode RE2 and the second repair electrode REPE2, and the overlap point between the shared electrode SHE and the second repair electrode REPE2, to connect the second reflective electrode RE2 and the shared electrode SHE to each other via the second repair electrode REPE2. That is, because the shared electrode SHE is connected to the second reflective electrode RE2 via the second repair electrode REPE2, a normal first light-emitting element LED1 can be connected to the driving transistor DT via the shared electrode SHE, the second repair electrode REPE2, and the second reflective electrode RE2. In other words, even if the second light-emitting element LED2, which is connected in series with the first light-emitting element LED1, is defective, a current path between the first light-emitting element LED1 and the power line VL can be formed via the shared electrode SHE and the second repair electrode REPE2. Therefore, the power current detours to the first light-emitting element LED1, and the first light-emitting element LED1 can be driven normally. Therefore, the defect of completely darkening the sub-pixel SP can be minimized or reduced. Furthermore, the second reflective electrode RE2 connected to the first electrode 134 of the second light-emitting element LED2 and the shared electrode SHE connected to the second electrode 135 of the second light-emitting element LED2 are connected so that the same voltage is applied to the first electrode 134 and the second electrode 135 of the second light-emitting element LED2, so that the second light-emitting element LED2 can be completely dimmed.

[0161] In the display device 100 according to an exemplary embodiment of the present disclosure, considering the power efficiency of each sub-pixel SP, a series connection structure of light-emitting elements LEDs and a repair structure via a first repair electrode REPE1 and a second repair electrode REPE2 can be selectively applied. For example, multiple light-emitting elements LEDs can be provided only in series with the relatively low-end red sub-pixel RSP, and only one light-emitting element LED can be provided in each of the green sub-pixel GSP and the blue sub-pixel BSP. Therefore, the repair structure using the first repair electrode REPE1 and the second repair electrode REPE2 can also be applied only to the red sub-pixel RSP. However, the present disclosure is not limited thereto. The first repair electrode REPE1 and the second repair electrode REPE2, as well as multiple light-emitting elements LEDs connected in series with the green sub-pixel GSP and the blue sub-pixel BSP, can be provided. This can be designed in various ways, taking into account the power efficiency of the display device 100 or the arrangement of the sub-pixel SPs.

[0162] Figure 11 This is a plan view of the sub-pixels of a display device according to another exemplary embodiment of the present disclosure. Figure 12 It is along Figure 11 The cross-sectional view taken from line XII-XII'. Figure 11 and Figure 12 The display device 200 and Figures 1 to 10C The only difference between the display devices 100 is the first reflective electrode RE1, the second reflective electrode RE2, the adhesive layer ADH, the light-emitting element LED, the first sub-connecting electrode SCE1, the second sub-connecting electrode SCE2, the shared electrode SHE, the first connecting electrode CE1 and the second connecting electrode CE2, but the other components are basically the same, so redundant descriptions are omitted.

[0163] Reference Figure 11 and Figure 12 The first reflective electrode RE1 and the second reflective electrode RE2, which are spaced apart from each other, can be disposed on the first planarization layer 115. The first reflective electrode RE1 and the second reflective electrode RE2 electrically connect the light-emitting element LED to the power line VL and the driving transistor DT, and can also be used as a reflector to reflect the light emitted from the light-emitting element LED to the upper part of the light-emitting element LED.

[0164] The first reflective electrode RE1 can be electrically connected to the driving transistor DT and the first light-emitting element LED1. The first reflective electrode RE1 can be connected to the drain electrode DE of the driving transistor DT through contact holes formed in the passivation layer 114 and the first planarization layer 115. In addition, the first reflective electrode RE1 can be electrically connected to the second electrode 225 of the first light-emitting element LED1 through the first connection electrode CE1.

[0165] The second reflective electrode RE2 can be electrically connected to the power line VL and the second light-emitting element LED2. The second reflective electrode RE2 can be connected to the power line VL through contact holes formed in the passivation layer 114 and the first planarization layer 115, and can be electrically connected to the first electrode 234 of the second light-emitting element LED2 by the second sub-connection electrode SCE2 described below.

[0166] The first repair electrode REPE1 and the second repair electrode REPE2, made of the same material as the first reflective electrode RE1 and the second reflective electrode RE2, can be disposed on the same layer as the first reflective electrode RE1 and the second reflective electrode RE2. That is, the first repair electrode REPE1 and the second repair electrode REPE2 can be disposed on the first planarization layer 115 in the same way as the first reflective electrode RE1 and the second reflective electrode RE2.

[0167] The first repair electrode REPE1 and the second repair electrode REPE2 are connected to the shared electrode SHE connecting the first light-emitting element LED1 and the second light-emitting element LED2 to form a circuitous path for the current to drive the transistor DT or the power line VL. Therefore, even if either the first light-emitting element LED1 or the second light-emitting element LED2 connected in series is defective, the remaining light-emitting element can still be driven normally.

[0168] The first repair electrode REPE1 can be disposed between the first sub-connecting electrode SCE1 and the shared electrode SHE. In this case, at least a portion of the first repair electrode REPE1 can be configured to overlap with the first sub-connecting electrode SCE1 and the shared electrode SHE. Therefore, when the first light-emitting element LED1 is defective, a welding process can be performed by irradiating the overlap points of the first sub-connecting electrode SCE1 and the first repair electrode REPE1, as well as the overlap points of the shared electrode SHE and the first repair electrode REPE1, to make the first repair electrode REPE1 contact the first sub-connecting electrode SCE1 and the shared electrode SHE. Therefore, the first sub-connecting electrode SCE1 and the shared electrode SHE can be connected through the first repair electrode REPE1. Therefore, the second light-emitting element LED2 can be connected to the driving transistor DT through the shared electrode SHE, the first repair electrode REPE1, and the first sub-connecting electrode SCE1. Therefore, even if the first light-emitting element LED1, which is connected in series with the second light-emitting element LED2, is defective, the second light-emitting element LED2 can be normally turned on by receiving the driving current of the driving transistor DT.

[0169] Furthermore, the shared electrode SHE connected to the first electrode 224 of the first light-emitting element LED1 and the first sub-connecting electrode SCE1 connected to the second electrode 225 of the first light-emitting element LED1 are connected to each other by a welding process. Therefore, the same voltage is applied to the first electrode 224 and the second electrode 225 of the first light-emitting element LED1 to make the first light-emitting element LED1 completely darken.

[0170] In contrast, when the first light-emitting element LED1 is normal, the first repair electrode REPE1 can be in a floating state that is not connected to any other electrode, including the first sub-connection electrode SCE1 and the shared electrode SHE.

[0171] The second repair electrode REPE2 can be disposed between the shared electrode SHE and the second sub-connecting electrode SCEC2. In this case, at least a portion of the second repair electrode REPE2 can be arranged to overlap with the shared electrode SHE and the second sub-connecting electrode SCEC2. Therefore, when the second light-emitting element LED2 is defective, a welding process can be performed by irradiating the overlap points of the shared electrode SHE and the second repair electrode REPE2, as well as the overlap points of the second sub-connecting electrode SCEC2 and the second repair electrode REPE2, with a laser beam, so that the second repair electrode REPE2 contacts the second sub-connecting electrode SCEC2 and the shared electrode SHE. Therefore, the second sub-connecting electrode SCEC2 and the shared electrode SHE can be connected through the second repair electrode REPE2. Therefore, the first light-emitting element LED1 can be connected to the power line VL through the shared electrode SHE, the second repair electrode REPE2, and the second sub-connecting electrode SCEC2. Therefore, even if the second light-emitting element LED2, which is connected in series with the first light-emitting element LED1, is defective, the first light-emitting element LED1 can still be normally turned on by receiving the power current from the power line VL.

[0172] Furthermore, the second reflective electrode RE2, connected to the first electrode 234 of the second light-emitting element LED2, and the shared electrode SHE, connected to the second electrode 235 of the second light-emitting element LED2, are connected to each other by a welding process. Therefore, the same voltage is applied to both the first electrode 234 and the second electrode 235 of the second light-emitting element LED2, allowing the second light-emitting element LED2 to be completely dimmed.

[0173] In contrast, when the second light-emitting element LED2 is normal, the second repair electrode REPE2 can be in a floating state that is not connected to any other electrodes, including the second sub-connection electrode SCE2 and the shared electrode SHE.

[0174] In addition, in order to prevent the driving transistor DT, the first reflective electrode RE1 and the second reflective electrode RE2 from being soldered during the soldering process of the first repair electrode REPE1 and the second repair electrode REPE2, the first repair electrode REPE1 and the second repair electrode REPE2 can be configured not to overlap with the driving transistor DT, the first reflective electrode RE1 and the second reflective electrode RE2, but are not limited thereto.

[0175] An adhesive layer ADH is formed on the first reflective electrode RE1 and the second reflective electrode RE2 on the front surface of the substrate 110 to fix the light-emitting element LED disposed on the adhesive layer ADH. The adhesive layer ADH can be formed of a photocurable adhesive material. For example, the adhesive layer ADH can be formed of an acrylic material including a photosensitizer, but is not limited thereto.

[0176] Multiple light-emitting elements (LEDs) can be disposed on the adhesive layer ADH. These LEDs may include a first LED1 and a second LED2 connected in series. The first LED1 and the second LED2 can emit light of the same color.

[0177] The first light-emitting element LED1 may include a first semiconductor layer 221, a light-emitting layer 222, a second semiconductor layer 223, a first electrode 224, a second electrode 225, and a passivation film 226.

[0178] First, the second semiconductor layer 223 can be disposed on the first semiconductor layer 221. Either the first semiconductor layer 221 or the second semiconductor layer 223 can be a semiconductor layer doped with n-type impurities, and the remainder can be a semiconductor layer doped with p-type impurities. For example, the first semiconductor layer 221 and the second semiconductor layer 223 can be layers doped with n-type and p-type impurities into materials such as gallium nitride (GaN), indium aluminum phosphide (InAlP), or gallium arsenide (GaAs).

[0179] The light-emitting layer 222 can be disposed between the first semiconductor layer 221 and the second semiconductor layer 223. The light-emitting layer 222 can emit light by receiving holes and electrons from the first semiconductor layer 221 and the second semiconductor layer 223.

[0180] The first electrode 224 can be disposed below the first semiconductor layer 221. The first electrode 224 is an electrode used to electrically connect the second electrode 225 of the second light-emitting element LED2 and the first semiconductor layer 221 through a shared electrode SHE and a second connecting electrode CE2. In this case, the first semiconductor layer 221 can be a semiconductor layer doped with n-type impurities, and the first electrode 224 can be a cathode.

[0181] Furthermore, the width of the first electrode 224 can be greater than the width of the light-emitting layer 222, the second semiconductor layer 223, the second electrode 225, and especially the width of the first semiconductor layer 221. When forming the first electrode 224, its width can be made larger than the size of the first semiconductor layer 221 and the passivation film 226. In this way, the first electrode 224 protrudes from the first semiconductor layer 221 to be disposed on the outermost side of the first light-emitting element LED1, so that the first electrode 224 can be easily connected to the electrodes of the display device 200.

[0182] also, Figure 12 An example is shown where a first electrode 224 protrudes from a passivation film 226 to surround a side surface of the passivation film 226, but the present disclosure is not limited thereto, and the end of the first electrode 224 may be disposed on the same plane as the end of the passivation film 226.

[0183] The second electrode 225 can be disposed on the second semiconductor layer 223. The second electrode 225 is an electrode used for electrically connecting the driving transistor DT and the second semiconductor layer 223. In this case, the second semiconductor layer 223 can be a semiconductor layer doped with p-type impurities, and the second electrode 225 can be an anode.

[0184] A passivation film 226 may be provided around the first semiconductor layer 221, the light-emitting layer 222, the second semiconductor layer 223, and the second electrode 225. The passivation film 226 may be formed of an insulating material to protect the first semiconductor layer 221, the light-emitting layer 222, and the second semiconductor layer 223.

[0185] Similar to the first light-emitting element LED1, the second light-emitting element LED2 may include a first semiconductor layer 231, a light-emitting layer 232, a second semiconductor layer 233, a first electrode 234, a second electrode 235, and a passivation film 236. The shape and arrangement of each component of the second light-emitting element LED2 may be substantially the same as those of the first light-emitting element LED1, therefore, redundant descriptions will be omitted.

[0186] A first sub-connecting electrode SCE1 and a second sub-connecting electrode SCE2, spaced apart from each other, can be disposed on the adhesive layer ADH. The first sub-connecting electrode SCE1 is an electrode used for electrically connecting the first light-emitting element LED1 and the driving transistor DT. The first sub-connecting electrode SCE1 can be connected to the first reflective electrode RE1 through a contact hole formed in the adhesive layer ADH. Therefore, the first sub-connecting electrode SCE1 can be connected to the driving transistor DT through the first reflective electrode RE1. For example, the first sub-connecting electrode SCE1 can be connected to the second electrode 225 of the first light-emitting element LED1 and the drain electrode DE of the driving transistor DT, but is not limited thereto.

[0187] The second sub-connecting electrode SCE2 is an electrode used for electrically connecting the second light-emitting element LED2 and the power line VL. The second sub-connecting electrode SCE2 can be configured to surround the lower edge of the second light-emitting element LED2 and be disposed on the side surface of the second light-emitting element LED2. Therefore, the second sub-connecting electrode SCE2 can be connected to the first electrode 234 by contacting the first electrode 234. The second sub-connecting electrode SCE2 can be connected to the second reflective electrode RE2 through a contact hole formed in the adhesive layer ADH. Therefore, the second sub-connecting electrode SCE2 can be electrically connected to the power line VL through the second reflective electrode RE2. For example, the second sub-connecting electrode SCE2 can connect the first electrode 234 of the second light-emitting element LED2 and the power line VL, but is not limited thereto.

[0188] A shared electrode SHE can be disposed on the adhesive layer ADH, spaced apart from the first sub-connecting electrode SCE1 and the second sub-connecting electrode SCE2. For example, the shared electrode SHE can be disposed between the first sub-connecting electrode SCE1 and the second sub-connecting electrode SCE2. The shared electrode SHE can electrically connect the first light-emitting element LED1 and the second light-emitting element LED2. For example, the shared electrode SHE can be disposed around the lower edge of the first light-emitting element LED1 and on the side surface of the first light-emitting element LED1. Therefore, the shared electrode SHE can be connected to the first light-emitting element LED1 by contacting the first electrode 224. Furthermore, the shared electrode SHE can be connected to the second electrode 235 of the second light-emitting element LED2 by connecting the second connecting electrode CE2, as described below.

[0189] For example, the shared electrode SHE may be disposed on the same layer as the first sub-connecting electrode SCE1 and the second sub-connecting electrode SCE2, and may be made of the same material as the first sub-connecting electrode SCE1 and the second sub-connecting electrode SCE2, but is not limited thereto.

[0190] The first connecting electrode CE1 and the second connecting electrode CE2 can be positioned spaced apart from each other on the second planarization layer 116. The first connecting electrode CE1 is an electrode used for electrically connecting the first light-emitting element LED1 and the driving transistor DT. The first connecting electrode CE1 can be connected to the first sub-connecting electrode SCE1 through a contact hole formed in the second planarization layer 116. Therefore, the first connecting electrode CE1 can be connected to the driving transistor DT through the first sub-connecting electrode SCE1 and the first reflecting electrode RE1. For example, the first connecting electrode CE1 can be connected to the second electrode 225 of the first light-emitting element LED1 and the drain electrode DE of the driving transistor DT, but is not limited thereto.

[0191] The second connecting electrode CE2 is an electrode used to electrically connect the second light-emitting element LED2 to the shared electrode SHE. The second connecting electrode CE2 can be connected to the shared electrode SHE through a contact hole formed in the second planarization layer 116. Therefore, the second connecting electrode CE2 can connect the second electrode 235 of the second light-emitting element LED2 to the shared electrode SHE, but is not limited thereto.

[0192] Figure 13 This is a plan view of the sub-pixels of a display device according to another exemplary embodiment of the present disclosure. Figure 14 It is along Figure 13 A cross-sectional view taken from line XIV-XIV'. Figure 15 This is a plan view of the sub-pixels of a display device according to another exemplary embodiment of the present disclosure. Figure 16 It is along Figure 14 The cross-sectional view taken by line XVI-XVI'. Specifically, Figure 13 and Figure 14 This diagram illustrates a repair method for a defective second light-emitting element (LED2) among multiple LED light-emitting elements. Figure 15 and Figure 16 This diagram illustrates a repair method for a defective first light-emitting element (LED1) among multiple light-emitting elements (LEDs).

[0193] In a display device 200 according to another exemplary embodiment of the present disclosure, when any one of the plurality of light-emitting elements LEDs is defective, a common electrode SHE connecting the plurality of light-emitting elements LEDs and the first sub-connection electrode SCE1 or the second sub-connection electrode SCE2 is normally driven by performing a soldering process to minimize or reduce the defect in which the corresponding sub-pixel SP is completely darkened.

[0194] Furthermore, since the probability that both the first light-emitting element LED1 and the second light-emitting element LED2 are defective is very low, it will be assumed and described below that if one of the light-emitting elements LED is found to be defective, the other is normal, and therefore light emission testing for the other is unnecessary.

[0195] First, refer to Figure 13 and Figure 14 The luminescence test of the second light-emitting element LED2 can be performed before the process of forming the second planarization layer 116. Since the first electrode 234 of the second light-emitting element LED2 is connected to the power line VL through the second sub-connecting electrode SCE2, the luminescence test can be performed by applying a luminescence test signal to the second electrode 235 through the power line VL and by applying a probe to the second electrode 235. When the second light-emitting element LED2 is found to be defective as a result of the luminescence test, a welding process can be performed by irradiating the overlap point of the shared electrode SHE and the second repair electrode REPE2, as well as the overlap point of the second sub-connecting electrode SCE2 and the second repair electrode REPE2, with a laser beam, so that the second repair electrode REPE2 can contact the second sub-connecting electrode SCE2 and the shared electrode SHE.

[0196] Specifically, refer to Figure 14 When the welding process is performed by irradiating the shared electrode SHE and the second sub-connecting electrode SCE2 with a laser beam, the adhesive layer ADH between the shared electrode SHE, the second sub-connecting electrode SCE2 and the second repair electrode REPE2 can be opened, and a portion of the shared electrode SHE and the second sub-connecting electrode SCE2 can be melted, and the shared electrode SHE and the second sub-connecting electrode SCE2 can be connected to the second repair electrode REPE2.

[0197] Therefore, the second sub-connecting electrode SCE2 and the shared electrode SHE can be connected via the second repair electrode REPE2. Thus, the second sub-connecting electrode SCE2, connected to the first electrode 234 of the second light-emitting element LED2, and the shared electrode SHE, connected to the second electrode 235 of the second light-emitting element LED2, are connected to each other, such that the same voltage is applied to both the first electrode 234 and the second electrode 235 of the second light-emitting element LED2. Therefore, the second light-emitting element LED2 can be completely dimmed.

[0198] Subsequently, a second planarization layer 116, a first connecting electrode CE1, and a second connecting electrode CE2 are formed to turn on only the first light-emitting element LED1. For example, when both the first light-emitting element LED1 and the second light-emitting element LED2 are functioning normally, the first light-emitting element LED1 is connected to the power line VL through the second light-emitting element LED2. However, because the shared electrode SHE is connected to the second sub-connecting electrode SCE2 through the second repair electrode REPE2, the first light-emitting element LED1 can be connected to the power line VL through the shared electrode SHE, the second repair electrode REPE2, and the second sub-connecting electrode SCE2.

[0199] In other words, a current path between the first light-emitting element LED1 and the power line VL can be formed through the shared electrode SHE and the second repair electrode REPE2. Therefore, even if the second light-emitting element LED2, which is connected in series with the first light-emitting element LED1, is defective, it can still normally drive the power current that detours to the first light-emitting element LED1.

[0200] In this case, since the first light-emitting element LED1 is normal, the first repair electrode REPE1 can be in a floating state that is not connected to any other electrode including the first sub-connection electrode SCE1 and the shared electrode SHE.

[0201] Reference Figure 15 and Figure 16 As mentioned above, it is very rare for both the first light-emitting element LED1 and the second light-emitting element LED2 to be defective. Therefore, the light-emitting test of the first light-emitting element LED1 can only be performed if the result of the light-emitting test of the second light-emitting element LED2 is that the second light-emitting element LED2 is normal.

[0202] Unlike the light emission test of the second light-emitting element LED2, the light emission test of the first light-emitting element LED1 can be performed after the light emission test of the second light-emitting element LED2 and after the second planarization layer 116, the first connecting electrode CE1 and the second connecting electrode CE2 have all been formed.

[0203] As a result of the light emission test of the first light-emitting element LED1, the welding process can be performed by irradiating the overlap point between the first sub-connecting electrode SCE1 and the first repair electrode REPE1 with an irradiation laser and by irradiating the overlap point between the shared electrode SHE and the first repair electrode REPE1 to make the first repair electrode REPE1 contact the first sub-connecting electrode SCE1 and the shared electrode SHE.

[0204] Specifically, refer to Figure 16 When the welding process is performed by irradiating the shared electrode SHE and the first sub-connecting electrode SCE1 with a laser beam, the second planarization layer 116 disposed on the shared electrode SHE and the first sub-connecting electrode SCE1 and the adhesive layer ADH between the shared electrode SHE and the first sub-connecting electrode SCE1 and the first repair electrode REPE1 can be opened, a portion of the shared electrode SHE and the first sub-connecting electrode SCE1 can be melted, and the shared electrode SHE and the first sub-connecting electrode SCE1 can be connected to the first repair electrode REPE1. Figure 16 The diagram shows the second planarization layer 116 being opened by laser irradiation, but is not limited thereto. The second planarization layer 116 may also remain unopened and maintain its position relative to the surrounding environment. Figure 14 The same shape. The adhesive layer ADH between the shared electrode SHE and the first sub-connecting electrode SCE1 is opened so that the shared electrode SHE and the first sub-connecting electrode SCE1 can be connected to the first repair electrode REPE1.

[0205] Therefore, the first sub-connecting electrode SCE1 and the shared electrode SHE can be connected through the first repair electrode REPE1. Thus, the shared electrode SHE connected to the first electrode 224 of the first light-emitting element LED1 and the first sub-connecting electrode SCE1 connected to the second electrode 225 of the first light-emitting element LED1 are connected to each other, such that the same voltage is applied to the first electrode 224 and the second electrode 225 of the first light-emitting element LED1, so that the first light-emitting element LED1 can be completely dimmed.

[0206] Therefore, only the second light-emitting element LED2 can be turned on. For example, when both the first light-emitting element LED1 and the second light-emitting element LED2 are normal, the second light-emitting element LED2 is connected to the driving transistor DT through the first light-emitting element LED1. However, since the shared electrode SHE is connected to the first sub-connection electrode SCE1 through the first repair electrode REPE1, the second light-emitting element LED2 can be connected to the driving transistor DT through the shared electrode SHE, the first repair electrode REPE1, and the first sub-connection electrode SCE1.

[0207] In other words, a current path between the second light-emitting element LED2 and the driving transistor DT can be formed through the shared electrode SHE and the first repair electrode REPE1. Therefore, even if the first light-emitting element LED1, which is connected in series with the second light-emitting element LED2, is defective, the driving current that detours to the second light-emitting element LED2 can still be driven normally.

[0208] In this case, since the second light-emitting element LED2 is normal, the second repair electrode REPE2 can be in a floating state not connected to any other electrodes including the second sub-connection electrode SCE2 and the shared electrode SHE.

[0209] In a display device 200 according to another exemplary embodiment of the present disclosure, a first light-emitting element LED1 and a second light-emitting element LED2 connected in series with each other can be disposed in a sub-pixel SP. For example, the first light-emitting element LED1 and the second light-emitting element LED2 can be connected through a shared electrode SHE. Specifically, the second electrode 225 of the first light-emitting element LED1 can be connected to the driving transistor DT, the first electrode 234 of the second light-emitting element LED2 can be connected to the power line VL, and the shared electrode SHE can be connected to the first electrode 224 of the first light-emitting element LED1 and the second electrode 235 of the second light-emitting element LED2. Therefore, the first light-emitting element LED1 can be connected to the power line VL through the second light-emitting element LED2, and the second light-emitting element LED2 can be connected to the driving transistor DT through the first light-emitting element LED1. As described above, the first light-emitting element LED1 and the second light-emitting element LED2 are connected in series to reduce the current flowing through each sub-pixel SP, thereby reducing power consumption.

[0210] Specifically, in a display device 200 according to another exemplary embodiment of the present disclosure, a shared electrode SHE connecting the first light-emitting element LED1 and the second light-emitting element LED2 is connected to a first repair electrode REPE1 or a second repair electrode REPE2 to form a circuitous path for the current of the driving transistor DT or the power line VL. Therefore, even if either the first light-emitting element LED1 or the second light-emitting element LED2 connected in series is defective, the remaining light-emitting elements can be driven normally. For example, in a display device 200 according to another exemplary embodiment of the present disclosure, when the first light-emitting element LED1 is defective, a welding process can be performed by irradiating the overlap point of the first sub-connecting electrode SCE1 and the first repair electrode REPE1 with a laser to connect the first sub-connecting electrode SCE1 and the shared electrode SHE1 to each other via the first repair electrode REPE1. Therefore, the second light-emitting element LED2 can be connected to the driving transistor DT via the shared electrode SHE, the first repair electrode REPE1, and the first sub-connecting electrode SCE1. In other words, a current path between the second light-emitting element LED2 and the driving transistor DT can be formed through the shared electrode SHE and the first repair electrode REPE1. Therefore, the driving current detours to the second light-emitting element LED2, and the second light-emitting element LED2 can be driven normally even if the first light-emitting element LED1 is defective. Thus, the defect of the sub-pixel SP being completely darkened can be minimized or reduced. Furthermore, since the shared electrode SHE connected to the first electrode 224 of the first light-emitting element LED1 and the first sub-connection electrode SCE1 connected to the second electrode 225 of the first light-emitting element LED1 are connected to each other, the same voltage is applied to the first electrode 224 and the second electrode 225 of the first light-emitting element LED1, allowing the first light-emitting element LED1 to be completely darkened.

[0211] Similarly, in a display device 200 according to another exemplary embodiment of the present disclosure, when the second light-emitting element LED2 is defective, a welding process can be performed by irradiating the overlap point of the second sub-connection electrode SCE2 and the second repair electrode REPE2 with a laser and overlapping it with the shared electrode SHE2 to connect the second sub-connection electrode SCE2 and the shared electrode SHE to each other via the second repair electrode REPE2. Therefore, the first light-emitting element LED1 can be connected to the driving transistor DT via the shared electrode SHE, the second repair electrode REPE2, and the second sub-connection electrode SCE2. That is, a current path between the first light-emitting element LED1 and the power line VL can be formed via the shared electrode SHE and the second repair electrode REPE2. Therefore, the power current detours to the first light-emitting element LED1, and the first light-emitting element LED1 can be driven normally even if the second light-emitting element LED2 is defective. Therefore, the defect where the sub-pixel SP is completely darkened can be minimized or reduced. Furthermore, the second sub-connection electrode SCE2 connected to the first electrode 234 of the second light-emitting element LED2 and the shared electrode SHE connected to the second electrode 235 of the second light-emitting element LED2 are connected to each other. Therefore, the same voltage is applied to the first electrode 234 and the second electrode 235 of the second light-emitting element LED2 so that the second light-emitting element LED2 can be completely dimmed.

[0212] In a display device 200 according to another exemplary embodiment of the present disclosure, considering the power efficiency of each sub-pixel SP, a series connection structure of light-emitting elements LEDs and a repair structure via a first repair electrode REPE1 and a second repair electrode REPE2 can be selectively applied. For example, multiple light-emitting elements LEDs can be provided, with the multiple light-emitting elements LEDs connected in series only to a red sub-pixel RSP having a lower power efficiency than the green sub-pixel GSP and the blue sub-pixel BSP, and only one light-emitting element LED can be provided in each of the green sub-pixel GSP and the blue sub-pixel BSP. Therefore, the repair structure using the first repair electrode REPE1 and the second repair electrode REPE2 can also be applied only to the red sub-pixel RSP. However, the present disclosure is not limited thereto. Multiple light-emitting elements LEDs connected in series with the green sub-pixel GSP and the blue sub-pixel BSP and the first repair electrode REPE1 and the second repair electrode REPE2 can be provided. Considering the power efficiency of the display device 200 or the arrangement structure of the sub-pixel SPs, the multiple light-emitting elements LEDs and the first repair electrode REPE1 and the second repair electrode REPE2 can be designed in various ways.

[0213] Exemplary embodiments of this disclosure can also be described as follows: A display device according to an exemplary embodiment of the present disclosure may include: a substrate defining a plurality of sub-pixels; driving transistors and power lines configured to be spaced apart from each other on the substrate; a plurality of light-emitting elements including a first light-emitting element disposed in at least some of the plurality of sub-pixels and a second light-emitting element connected in series with the first light-emitting element; and a shared electrode disposed on the substrate and electrically connected to the first light-emitting element and the second light-emitting element in at least some of the plurality of sub-pixels, the first light-emitting element and the second light-emitting element each including a first electrode and a second electrode, the second electrode of the first light-emitting element being electrically connected to the driving transistor, the first electrode of the second light-emitting element being electrically connected to the power lines, and the shared electrode being electrically connected to the second electrodes of the first light-emitting element and the second light-emitting element.

[0214] According to another aspect of this disclosure, the display device may further include a first reflective electrode and a second reflective electrode, the first reflective electrode and the second reflective electrode being configured to be spaced apart from each other on the driving transistor and the power line, the first reflective electrode being electrically connected to the second electrode of the driving transistor and the first light-emitting element, the second reflective electrode being electrically connected to the power line and the first electrode of the second light-emitting element, and a shared electrode being disposed on the same layer as the first reflective electrode and the second reflective electrode and being formed of the same material as the first reflective electrode and the second reflective electrode.

[0215] According to another aspect of this disclosure, the display device may further include a bonding layer made of conductive material disposed on each of the shared electrode and the second reflective electrode, wherein a first light-emitting element may be disposed on the bonding layer on the shared electrode, and a second light-emitting element may be disposed on the bonding layer on the second reflective electrode.

[0216] According to another aspect of this disclosure, the display device may further include a first repair electrode and a second repair electrode, wherein the first repair electrode is disposed between the first reflective electrode and the shared electrode to at least partially overlap with the first reflective electrode and the shared electrode, and the first repair electrode does not overlap with the driving transistor; and the second repair electrode is disposed between the shared electrode and the second reflective electrode to at least partially overlap with the shared electrode and the second reflective electrode, and the second repair electrode does not overlap with the driving transistor.

[0217] According to another aspect of this disclosure, the first repair electrode and the second repair electrode may be floating.

[0218] According to another aspect of this disclosure, the second light-emitting element among a plurality of light-emitting elements is a defective light-emitting element, the first repair electrode may be floating, and the second repair electrode may be in contact with the shared electrode and the second reflective electrode.

[0219] According to another aspect of this disclosure, the first light-emitting element among a plurality of light-emitting elements is a defective light-emitting element, the first repair electrode is in contact with the first reflective electrode and the shared electrode, and the second repair electrode may be floating.

[0220] According to another aspect of this disclosure, the first repair electrode and the second repair electrode can be disposed on the same layer as the source electrode and drain electrode of the driving transistor, and can be formed of the same material.

[0221] According to another aspect of this disclosure, the display device may further include a first connecting electrode and a second connecting electrode, the first connecting electrode being electrically connected to a second electrode of a first light-emitting element and a first reflective electrode, and the second connecting electrode being electrically connected to a second electrode of a second light-emitting element and a shared electrode.

[0222] According to another aspect of this disclosure, the display device may further include a first reflective electrode and a second reflective electrode, the first reflective electrode and the second reflective electrode being configured to be spaced apart from each other on the driving transistor and the power line, the first reflective electrode being electrically connected to the second electrode of the driving transistor and the first light-emitting element, and the second reflective electrode being electrically connected to the power line and the first electrode of the second light-emitting element.

[0223] According to another aspect of this disclosure, the display device may further include a first sub-connecting electrode and a second sub-connecting electrode disposed on the first reflective electrode and the second reflective electrode and spaced apart from each other. The first sub-connecting electrode may be electrically connected to a second electrode of a driving transistor and a first light-emitting element. The second sub-connecting electrode may be electrically connected to a power line and a first electrode of a second light-emitting element. A shared electrode may be disposed on the same layer as the first sub-connecting electrode and the second sub-connecting electrode, which are made of the same material, and the shared electrode may be disposed between the first sub-connecting electrode and the second sub-connecting electrode.

[0224] According to another aspect of this disclosure, the display device may further include a first repair electrode and a second repair electrode, wherein the first repair electrode is disposed between the first sub-connection electrode and the shared electrode to at least partially overlap with the first sub-connection electrode and the shared electrode, and does not overlap with the first reflective electrode and the second reflective electrode, and the second repair electrode is disposed between the shared electrode and the second sub-connection electrode to at least partially overlap with the shared electrode and the second sub-connection electrode, and does not overlap with the driving transistor, the first reflective electrode and the second reflective electrode.

[0225] According to another aspect of this disclosure, the first repair electrode and the second repair electrode may be floating.

[0226] According to another aspect of this disclosure, the second light-emitting element among the plurality of light-emitting elements is a defective light-emitting element, the first repair electrode may be floating, and the second repair electrode may be in contact with the shared electrode and the second sub-connection electrode.

[0227] According to another aspect of this disclosure, the first light-emitting element among the plurality of light-emitting elements may be a defective light-emitting element, the first repair electrode may be in contact with the first sub-connection electrode and the shared electrode, and the second repair electrode may be floating.

[0228] According to another aspect of this disclosure, the first repair electrode and the second repair electrode can be disposed on the same layer as the first reflective electrode and the second reflective electrode, and can be formed of the same material.

[0229] According to another aspect of this disclosure, each of the first light-emitting element and the second light-emitting element may further include a first semiconductor layer, a light-emitting layer and a second semiconductor layer disposed sequentially between the first electrode and the second electrode. The width of the first electrode may be greater than the width of each of the first semiconductor layer, the light-emitting layer, the second semiconductor layer and the second electrode. A shared electrode may be disposed on the side surface of the first light-emitting element to be electrically connected to the first electrode of the first light-emitting element, and a second sub-connection electrode may be disposed on the side surface of the second light-emitting element to be electrically connected to the first electrode of the second light-emitting element.

[0230] According to another aspect of this disclosure, the display device may further include a first connecting electrode and a second connecting electrode, the first connecting electrode being electrically connected to a first sub-connecting electrode and a second electrode of the first light-emitting element, and the second connecting electrode being electrically connected to a shared electrode and a second electrode of the second light-emitting element.

[0231] According to another aspect of this disclosure, the plurality of sub-pixels may include red sub-pixels, green sub-pixels, and blue sub-pixels, and a shared electrode may be disposed in the red sub-pixel among the plurality of sub-pixels.

[0232] According to another aspect of this disclosure, the shared electrode can also be disposed in the green sub-pixel among multiple sub-pixels.

[0233] Although exemplary embodiments of the present disclosure have been described in detail with reference to the accompanying drawings, the present disclosure is not limited thereto and may be implemented in various forms without departing from the technical concept of the present disclosure. Therefore, the exemplary embodiments of the present disclosure are provided for illustrative purposes only and are not intended to limit the technical concept of the present disclosure. The scope of the technical concept of the present disclosure is not limited thereto. Therefore, it should be understood that the above embodiments are exemplary in all embodiments and do not limit the present disclosure.

[0234] Cross-reference to related applications

[0235] This application claims priority to Korean Patent Application No. 10-2025-0056208, filed with the Korean Intellectual Property Office on April 29, 2025, the disclosure of which is incorporated herein by reference.

Claims

1. A display device, the display device comprising: A substrate having a plurality of sub-pixels defined thereon; A driving transistor and a power line are disposed on the substrate and spaced apart from each other. A plurality of light-emitting elements, the plurality of light-emitting elements including a first light-emitting element and a second light-emitting element, wherein the first light-emitting element is disposed in at least some of the plurality of sub-pixels, and the second light-emitting element is connected in series with the first light-emitting element; as well as A shared electrode is disposed on the substrate and electrically connected to at least some of the plurality of sub-pixels, namely the first light-emitting element and the second light-emitting element. The first light-emitting element and the second light-emitting element each include a first electrode and a second electrode. The second electrode of the first light-emitting element is electrically connected to the driving transistor. The first electrode of the second light-emitting element is electrically connected to the power line, and The shared electrode is electrically connected to the second electrode of the first light-emitting element and the second light-emitting element.

2. The display device according to claim 1, further comprising: A first reflective electrode and a second reflective electrode are configured to be spaced apart from each other on the driving transistor and the power line. The first reflective electrode is electrically connected to the driving transistor and the second electrode of the first light-emitting element. The second reflective electrode is electrically connected to the electric field line and the first electrode of the second light-emitting element. The shared electrode is disposed on the same layer as the first reflective electrode and the second reflective electrode, between the first reflective electrode and the second reflective electrode, and the shared electrode is formed of the same material as the first reflective electrode and the second reflective electrode.

3. The display device according to claim 2, further comprising: A bonding layer is disposed on the shared electrode and the second reflective electrode respectively, and the bonding layer is made of a conductive material. The first light-emitting element is disposed on the bonding layer on the shared electrode, and The second light-emitting element is disposed on the bonding layer on the second reflective electrode.

4. The display device according to claim 2, further comprising: A first repair electrode is disposed between the first reflective electrode and the shared electrode to at least partially overlap with the first reflective electrode and the shared electrode but not with the driving transistor; as well as A second repair electrode is disposed between the shared electrode and the second reflective electrode to at least partially overlap with the shared electrode and the second reflective electrode but not with the driving transistor.

5. The display device according to claim 4, wherein, The first repair electrode and the second repair electrode are floating.

6. The display device according to claim 4, wherein, The second light-emitting element among the plurality of light-emitting elements is a defective light-emitting element. The first repair electrode is floating, and The second repair electrode is in contact with the shared electrode and the second reflective electrode.

7. The display device according to claim 4, wherein, The first light-emitting element among the plurality of light-emitting elements is a defective light-emitting element. The first repair electrode is in contact with the first reflective electrode and the shared electrode, and The second repair electrode is floating.

8. The display device according to claim 4, wherein, The first repair electrode and the second repair electrode are disposed on the same layer as the source electrode and the drain electrode of the driving transistor, and the first repair electrode and the second repair electrode are formed of the same material as the source electrode and the drain electrode of the driving transistor.

9. The display device according to claim 2, further comprising: A first connecting electrode is electrically connected to a second electrode of the first light-emitting element and a first reflective electrode. as well as The second connecting electrode is electrically connected to the second electrode of the second light-emitting element and the shared electrode.

10. The display device according to claim 1, further comprising: A first reflective electrode and a second reflective electrode are configured to be spaced apart from each other on the driving transistor and the power line. Wherein, the first reflective electrode is electrically connected to the driving transistor and the second electrode of the first light-emitting element, and The second reflective electrode is electrically connected to the power line and the first electrode of the second light-emitting element.

11. The display device according to claim 10, further comprising: A first sub-connecting electrode and a second sub-connecting electrode are configured to be spaced apart from each other on the first reflective electrode and the second reflective electrode, respectively. The first sub-connection electrode is electrically connected to the second electrode of the driving transistor and the first light-emitting element. The second sub-connecting electrode is electrically connected to the power line and the first electrode of the second light-emitting element, and The shared electrode is disposed on the same layer as the first sub-connection electrode and the second sub-connection electrode, and the shared electrode is made of the same material as the first sub-connection electrode and the second sub-connection electrode. The shared electrode is disposed between the first sub-connection electrode and the second sub-connection electrode.

12. The display device according to claim 11, further comprising: A first repair electrode is disposed between the first sub-connection electrode and the shared electrode to at least partially overlap with the first sub-connection electrode and the shared electrode, but not overlap with the driving transistor, the first reflective electrode, and the second reflective electrode. as well as The second repair electrode is disposed between the shared electrode and the second sub-connection electrode to at least partially overlap with the shared electrode and the second sub-connection electrode and not overlap with the driving transistor, the first reflective electrode and the second reflective electrode.

13. The display device according to claim 12, wherein, The first repair electrode and the second repair electrode are floating.

14. The display device according to claim 12, wherein, The second light-emitting element among the plurality of light-emitting elements is a defective light-emitting element. The first repair electrode is floating, and The second repair electrode is in contact with the shared electrode and the second sub-connection electrode.

15. The display device according to claim 12, wherein, The first light-emitting element among the plurality of light-emitting elements is a defective light-emitting element. The first repair electrode is in contact with the first sub-connection electrode and the shared electrode, and The second repair electrode is floating.

16. The display device according to claim 12, wherein, The first repair electrode and the second repair electrode are disposed on the same layer as the first reflective electrode and the second reflective electrode, and the first repair electrode and the second repair electrode are formed of the same material as the first reflective electrode and the second reflective electrode.

17. The display device according to claim 11, wherein, The first light-emitting element and the second light-emitting element each further include a first semiconductor layer, a light-emitting layer, and a second semiconductor layer sequentially disposed between the first electrode and the second electrode. The width of the first electrode is greater than the width of each of the first semiconductor layer, the light-emitting layer, the second semiconductor layer, and the second electrode. The shared electrode is disposed on the side surface of the first light-emitting element to be electrically connected to the first electrode of the first light-emitting element, and The second sub-connecting electrode is disposed on the side surface of the second light-emitting element to be electrically connected to the first electrode of the second light-emitting element.

18. The display device according to claim 11, further comprising: A first connecting electrode, wherein the first connecting electrode is electrically connected to the first sub-connecting electrode and the second electrode of the first light-emitting element; as well as The second connecting electrode is electrically connected to the shared electrode and the second electrode of the second light-emitting element.

19. The display device according to claim 1, wherein, The plurality of sub-pixels includes red sub-pixels, green sub-pixels, and blue sub-pixels, and The shared electrode is disposed in the red sub-pixel among the plurality of sub-pixels.

20. The display device according to claim 19, wherein, The shared electrode is also disposed in the green sub-pixel among the plurality of sub-pixels.

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