Display device and tiled display device

Abstract

A display device and a tiled display device are provided. The display device according to an exemplary embodiment of the present disclosure includes a display panel, a plurality of contact units disposed on a side surface of the display panel, a metal cover disposed on a rear surface of the display panel and grounded, and a connection line disposed between the metal cover and the plurality of contact units. Accordingly, in the present disclosure, by disposing the plurality of contact units connected to the metal cover on the side surface of the display panel, the metal covers of the display devices can be connected to each other when the tiled display device is implemented.

Description

[0001] Cross-reference to related applications

[0002] This application claims the benefit and priority of Korean Patent Application No. 10-2022-0086251, filed in Korea on July 13, 2022, the entire contents of which are hereby expressly incorporated by reference in this disclosure. Technical Field

[0003] This disclosure relates to display devices and tiling display devices, and more specifically to display devices and tiling display devices in which signal noise can be controlled, for example, by selectively connecting the grounding structures of multiple respective display devices. Background Technology

[0004] Display devices used in computer monitors, TVs, and mobile phones include organic light-emitting displays (OLEDs) that emit their own light and liquid crystal displays (LCDs) that require a separate light source.

[0005] Display devices are being used in an increasing number of diverse applications, including not only computer monitors and TVs, but also personal mobile devices. Therefore, there is research on display devices that reduce size and weight while having a wide display area.

[0006] Display devices may include lines for transmitting various signals, and magnetic fields can be generated inside and outside the display device by signals applied to the lines. Electromagnetic interference (EMI) may occur due to these magnetic fields, and therefore, noise may be generated in the various signals used to drive the display device. In particular, in the case of a tiled display device that connects and uses multiple display devices, there are multiple signal lines, and because they are used simultaneously, they may be more susceptible to noise. Summary of the Invention

[0007] One aspect of this disclosure is to provide a display device and a tiled display device capable of reducing signal noise by changing the shape of an antenna that radiates EMI noise.

[0008] Another aspect of this disclosure is to provide a display device and a tiled display device, wherein reliability degradation due to signal noise is minimized by stably grounding a plurality of display devices.

[0009] Another aspect of this disclosure is to provide a display device and a tiled display device that can reduce noise by minimizing the ground potential difference between a plurality of respective display devices.

[0010] Another aspect of this disclosure is to provide a display device and a tiled display device that can reduce noise by connecting the grounding structures of multiple display devices to each other.

[0011] The purpose of this disclosure is not limited to the purposes mentioned above, and other purposes not mentioned above will be clearly understood by those skilled in the art from the following description.

[0012] A display device according to an exemplary embodiment of this disclosure includes: a display panel; a plurality of contact units disposed on a side surface of the display panel; a metal cover disposed on a rear surface of the display panel and grounded; and a connecting wire disposed between the metal cover and the plurality of contact units. Therefore, in this disclosure, by disposing of the plurality of contact units connected to the metal cover on the side surface of the display panel, the metal covers of the display device can be connected to each other when a tiled display device is implemented.

[0013] Another exemplary embodiment of the present disclosure provides a tiled display device comprising: a plurality of display devices arranged in a tiled configuration; and a plurality of contact units disposed on a side surface of each of the plurality of display devices, wherein each of the plurality of display devices includes: a display panel having the plurality of contact units disposed on a side surface of the display panel; and a metal cover disposed on a rear surface of the display panel, wherein the metal covers of the plurality of display devices are selectively connected to each other via the plurality of contact units. Therefore, according to the present disclosure, by selectively connecting the metal cover of one display device to the metal cover of another display device, signal-to-noise reduction designs for each frequency can be implemented differently.

[0014] Further details of the exemplary embodiments are included in the detailed description and drawings.

[0015] According to this disclosure, signal noise can be reduced by stably connecting the grounding structures of multiple corresponding display devices.

[0016] According to this disclosure, signal noise can be reduced by selectively connecting the grounding structures of multiple corresponding display devices to change the shape of the antenna.

[0017] According to this disclosure, the connection structure of the grounding structure of multiple display devices can be changed with regard to the characteristics of signal noise.

[0018] The effects of this disclosure are not limited to those exemplified above, and include a variety of other effects as described in this specification. Attached Figure Description

[0019] Figure 1 This is a plan view of a display device and a tiled display device according to an exemplary embodiment of the present disclosure.

[0020] Figure 2 This is an exploded perspective view of a display device according to an exemplary embodiment of the present disclosure.

[0021] Figure 3 and Figure 4 This is a rear view of a display device according to an exemplary embodiment of the present disclosure.

[0022] Figure 5 It is aimed at Figure 4 A schematic magnified perspective view of the display device in area X.

[0023] Figure 6 This is a cross-sectional view of a sub-pixel of a display device according to an exemplary embodiment of the present disclosure.

[0024] Figure 7 This is a schematic configuration diagram of the switching unit and multiple contact units of a display device according to an exemplary embodiment of the present disclosure.

[0025] Figure 8 and Figure 9 This is a plan view of a tiled display device according to an exemplary embodiment of the present disclosure.

[0026] Figure 10 This is a schematic rear view of a display device and a tiled display device according to another exemplary embodiment of the present disclosure.

[0027] Figure 11 This is a plan view of a display device and a tiled display device according to yet another exemplary embodiment of the present disclosure.

[0028] Figure 12 This is a rear view of a display device according to yet another exemplary embodiment of the present disclosure.

[0029] Figure 13 This is a cross-sectional view of a display device according to yet another exemplary embodiment of the present disclosure.

[0030] Figure 14 This is a cross-sectional view of a display device according to yet another exemplary embodiment of the present disclosure. Detailed Implementation

[0031] The advantages and features of this disclosure, as well as methods for achieving such advantages and features, will become clear from the exemplary embodiments described in detail below and 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 to enable those skilled in the art to fully understand the disclosure and scope of this disclosure.

[0032] The shapes, dimensions, ratios, 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. Throughout the specification, similar reference numerals generally denote similar elements. Furthermore, in the following description of this disclosure, detailed descriptions 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 additional components. Unless otherwise expressly stated, any reference to the singular may include the plural.

[0033] Even without explicit explanation, components are interpreted as including the normal tolerance range.

[0034] When using terms such as “on,” “above,” “below,” and “near” to describe the positional relationship between two parts, one or more parts may be located between the two parts unless the term is used with the terms “immediately adjacent” or “directly.”

[0035] When an element or layer is placed "on" another element or layer, the additional layer or element may be placed directly on or between the other element or layer.

[0036] 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 other components. Therefore, in the technical concept of this disclosure, the first component mentioned below can be the second component.

[0037] Throughout the manual, the same reference numerals usually indicate the same components.

[0038] The dimensions and thicknesses of each component shown in the accompanying drawings are for illustrative purposes only, and this disclosure is not limited to the dimensions and thicknesses of the components shown.

[0039] Features of various embodiments of this disclosure may be partially or wholly adhered to or combined with each other, and may be technically interlocked and operated in various ways, and these embodiments may be performed independently or in association with each other.

[0040] In the following, a display device and a tiled display device according to exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0041] Figure 1 This is a plan view of a display device and a tiled display device according to an exemplary embodiment of the present disclosure. Figure 2 This is an exploded perspective view of a display device according to an exemplary embodiment of the present disclosure. Figure 3 and Figure 4 This is a rear view of a display device according to an exemplary embodiment of the present disclosure. Figure 5 It is aimed at Figure 4 A schematic magnified perspective view of the display device in area X. Figure 6 This is a cross-sectional view of a sub-pixel of a display device according to an exemplary embodiment of the present disclosure. Specifically, Figure 2 This is an exploded perspective view of the display device viewed from the rear. For ease of description, in... Figure 2 The diagrams of multiple contact units CE and connecting lines CL are omitted, and... Figure 4 The illustrations of the first metal cover 180 and the second metal cover 190 are omitted.

[0042] Reference Figure 1 A tiled display device TD according to an exemplary embodiment of the present disclosure can be formed by connecting multiple display devices 100 according to an exemplary embodiment of the present disclosure. The tiled display device TD is implemented by multiple display devices 100 connected to each other, and can allow the display area on which the image is displayed to be enlarged.

[0043] Each of the plurality of display devices 100 constituting the tiled display device TD is arranged like a single display device 100. For example, the tiled display device TD can be implemented by attaching the plurality of display devices 100 to a frame or wall in a tiled manner. In this case, the plurality of display devices 100 can be connected by various wires and cables and driven as a single display device 100. Furthermore, the plurality of display devices 100 can be connected wirelessly without individual wires or cables.

[0044] Furthermore, when multiple display devices 100 are attached, they can be attached as closely as possible to each other, so that the distance between the multiple display devices 100 is constant and minimized, as if the multiple display devices 100 appear to be a single display device 100. In other words, by precisely aligning and attaching the multiple display devices 100 to the wall, the boundary area where no image is displayed can be minimized.

[0045] Reference Figures 2 to 4 Each of the plurality of display devices 100 includes a display panel 110, a plurality of flexible films 160, a printed circuit board 170, a first metal cover 180, a second metal cover 190, a plurality of contact units CE, a connecting line CL, and a switch unit SW.

[0046] In the display panel 110, for example, a light-emitting element 130 and circuits, lines, and components for driving the light-emitting element 130 may be provided. The light-emitting element 130 may be defined differently depending on the type of display panel 110. For example, when the display panel 110 is an organic light-emitting display panel, the light-emitting element 130 may be an organic light-emitting element including an anode, an organic light-emitting layer, and a cathode. For example, when the display panel 110 is an inorganic light-emitting display panel, the light-emitting element 130 may be a light-emitting diode (LED) or a micro-LED including an n-type semiconductor layer, a p-type semiconductor layer, and a light-emitting layer. However, this disclosure is not limited thereto, and the light-emitting element 130 of the display panel 110 may be configured differently.

[0047] Display panel 110 includes active area AA and passive area NA.

[0048] The active area AA is the area on the display panel 110 where an image is displayed. Multiple sub-pixels SP constituting multiple pixels and circuitry for driving the multiple sub-pixels SP can be provided in the active area AA. The multiple sub-pixels SP are the smallest units constituting the active area AA, and the light-emitting element 130 can be provided in each of the multiple sub-pixels SP. Furthermore, the circuitry for driving the multiple sub-pixels SP may include driving elements and lines. For example, the circuitry may include multiple transistors, storage capacitors, scan lines, data lines, etc., but this disclosure is not limited thereto. Reference will be made later. Figure 6 A more detailed description of multiple sub-pixels SP is provided.

[0049] The non-active region NA is the area where no image is displayed and can be defined as the area surrounding the active region AA. In the non-active region NA, link lines 152 for transmitting signals to the light-emitting element 130 and circuitry disposed in the active region AA, or driver ICs such as gate driver ICs or data driver ICs, can be provided. However, this disclosure is not limited thereto.

[0050] In this disclosure, it is described that the active region AA and the non-active region NA are defined on the front surface of the display panel 110. However, the non-active region NA may be defined as non-existent, and this disclosure is not limited thereto. That is, when a tiled display device TD is implemented using the display device 100 according to an exemplary embodiment of this disclosure, the distance between the outermost sub-pixel SP of one display device 100 and the outermost sub-pixel SP of another adjacent display device 100 can be made equal to the distance between multiple sub-pixels SP in one display device 100. Therefore, a zero-border area with essentially no border region can be achieved. Therefore, only the active region AA for displaying the image can be defined on the front surface of the display panel 110, but this disclosure is not limited thereto.

[0051] Multiple flexible films 160 are bonded to the rear surface of the display panel 110. The multiple flexible films 160 are films that provide signals to multiple sub-pixels SP by means of various components disposed on a flexible base film, and can be electrically connected to the display panel 110. The multiple flexible films 160 can provide power supply voltage and data voltage to the display panel 110. Although the figures show four flexible films 160 bonded adjacent to the upper edge of the display panel 110, the number and arrangement of the multiple flexible films 160 can be varied according to the design, and this disclosure is not limited thereto.

[0052] Driver ICs, such as gate driver ICs and data driver ICs, can be disposed on multiple flexible films 160. Driver ICs are components that process data for displaying images and drive signals for processing that data. Depending on the mounting method, driver ICs can be disposed using methods such as chip-on-glass (COG), chip-on-film (COF), or tape-on-carrier (TCP). However, for ease of description, a chip-on-film method is described where the driver ICs are mounted on multiple flexible films 160, but this disclosure is not limited thereto.

[0053] A printed circuit board 170 is disposed on the rear surface of the display panel 110. The printed circuit board 170 and a plurality of flexible films 160 are electrically connected to each other. The printed circuit board 170 is a component that provides signals to a driver IC. The printed circuit board 170 may have various components disposed therein for providing various signals, such as drive signals and data signals, to the driver IC. Although only one printed circuit board 170 is shown in the figures, the number of printed circuit boards 170 can vary depending on the design, and this disclosure is not limited thereto.

[0054] Metal covers, including a first metal cover 180 and a second metal cover 190, are disposed on the rear surface of the display panel 110. The metal covers can be configured to cover the rear surface of the display panel 110 to protect the display panel 110 from external influences. In addition, the metal covers can be used as panel grounding with a ground plane and for controlling signal noise.

[0055] A first metal cover 180 is disposed on the rear surface of the display panel 110. The first metal cover 180 may be disposed on the rear surface of the display panel 110 and between the display panel 110 and the plurality of flexible films 160 and between the display panel 110 and the printed circuit board 170. The first metal cover 180 may support the display panel 110 on the rear surface of the display panel 110 and serve as a grounding structure. That is, the first metal cover 180 may serve as a grounding terminal to form a ground plane of the display device 100 and help reduce the obstruction of electromagnetic interference (EMI) to an appropriate level or lower. The first metal cover 180 may be formed of a rigid material and may be formed of a metallic material, such as aluminum (Al), copper (Cu), zinc (Zn), silver (Ag), gold (Au), iron (Fe), stainless steel (SUS), or Invar.

[0056] The first metal cover 180 includes openings 181 corresponding to a plurality of flexible films 160 and printed circuit boards 170. The plurality of flexible films 160 and printed circuit boards 170 can be disposed on the display panel 110 through the openings 181 of the first metal cover 180. That is, the plurality of flexible films 160 and printed circuit boards 170 can contact the rear surface of the display panel 110 through the openings 181. Although the openings 181 are shown in the figures as having dimensions corresponding to the dimensions of the plurality of flexible films 160 and printed circuit boards 170, the openings 181 can be designed to various sizes, and this disclosure is not limited thereto.

[0057] A second metal cover 190 is provided to cover multiple flexible films 160 and printed circuit boards 170. The second metal cover 190 may be coupled to the rear surface of a first metal cover 180 and covers at least a portion of the multiple flexible films 160 and printed circuit boards 170 exposed from the first metal cover 180. The second metal cover 190 can protect the multiple flexible films 160 and printed circuit boards 170 from external impacts. In addition, the second metal cover 190 can also be used as a grounding structure to form a ground plane and can reduce signal noise caused by electromagnetic interference. For example, the second metal cover 190 may be formed of a rigid material and may be formed of a metallic material, such as aluminum (Al), copper (Cu), zinc (Zn), silver (Ag), gold (Au), iron (Fe), stainless steel (SUS), or Invar alloy.

[0058] The second metal cover 190 includes a plurality of holes 191. The plurality of holes 191 are for dissipating heat generated from the display device 100 when the display device 100 is activated. The plurality of holes 191 are arranged to overlap with the plurality of flexible films 160 and printed circuit boards 170 that generate a large amount of heat, so that the heat generated in the display device 100 can be effectively dissipated. In the accompanying drawings, the plurality of holes 191 are shown formed in the front surface of the second metal cover 190; however, the shape and arrangement of the plurality of holes 191 are exemplary and not limited thereto.

[0059] The first metal cover 180 and the second metal cover 190 can serve as a panel grounding structure as described above. That is, the first metal cover 180 and the second metal cover 190, formed of metallic material, can be grounded and form a grounding plane within the display device 100. Therefore, some components of the display device 100 can be connected to the first metal cover 180 and the second metal cover 190, which serve as the grounding structure, and can be grounded. For example, the printed circuit board 170 can be grounded by connecting to the first metal cover 180 and the second metal cover 190 via individual solder pads.

[0060] Various signals flow through each of the multiple display devices constituting the tiled display device, and electromagnetic interference and resulting signal noise may occur due to the magnetic fields generated by these signals. Signal noise caused by electromagnetic interference can include noise generated when channel outputs are produced, noise formed along the path the signal travels, and radiated noise radiated through the conductors of the display devices. Specifically, radiated noise is radiated using the conductors of the display devices (e.g., a first and second metal cover as a metal plate) as antennas, and may act as harmful electromagnetic waves that adversely affect the display devices and other adjacent display devices.

[0061] Therefore, in the display device 100 and tiled display device TD according to the exemplary embodiments of this disclosure, the first metal cover 180 and the second metal cover 190 are electrically connected to the first metal cover 180 and the second metal cover 190 of another adjacent display device 100 to change the shape of the antenna, thereby controlling signal noise, particularly radiated noise. In this case, in the tiled display device TD where multiple display devices 100 are tiled, the noise radiated by using each display device 100 as an antenna can be reduced or amplified depending on the overall shape of the ground plane based on the connection structure of the first metal cover 180 and the second metal cover 190. For example, the frequency of the signal noise that can be effectively controlled can differ depending on whether the first metal cover 180 and the second metal cover 190 of multiple corresponding display devices 100 are separated from each other and have separate ground planes, or whether the first metal cover 180 and the second metal cover 190 of multiple corresponding display devices 100 are connected to each other to form a ground plane. Therefore, when the connection structure of the first metal cover 180 and the second metal cover 190 is fixed, only certain frequencies of signal noise can be addressed. Therefore, in the display device 100 and the tiled display device TD according to the exemplary embodiments of the present disclosure, signal noise of various frequencies can be reduced by changing the connection structure of the first metal cover 180 and the second metal cover 190 of the plurality of corresponding display devices 100 by using the switching unit SW.

[0062] Typically, the first and second metal covers are grounding structures with ground planes and can be used as panel grounds. The ground planes of the multiple corresponding display devices constituting the tiled display device are not connected to each other but exist independently. However, since the grounding structure of each of the multiple display devices is of one type of power supply, a potential difference may exist between them, and this potential difference adversely affects signal noise. Furthermore, when the impedance of the first and second metal covers, which serve as grounding structures, is high, the first and second metal covers may exacerbate noise.

[0063] Therefore, in the display device 100 and tiled display device TD according to the exemplary embodiments of the present disclosure, a plurality of contact units CE are formed on the side surface of each of the plurality of display devices 100, such that the first metal cover 180 and the second metal cover 190, which serve as the grounding structure of each of the plurality of display devices 100, can be connected to the grounding structure of another display device 100. That is, the panel grounds of the plurality of corresponding display devices 100 can be connected to each other by connecting the first metal cover 180 and the second metal cover 190 of the plurality of display devices 100. Therefore, since the grounding structures of the plurality of corresponding display devices 100 are connected to each other to minimize potential difference and impedance, one of the causes of signal noise can be eliminated.

[0064] Specifically, refer to Figure 1 and Figures 4 to 6 Multiple contact units CE are disposed on the side surface of each of the multiple display devices 100. For example, multiple contact units CE are disposed on the side surface of the display panel 110. When a tiled display device TD is formed by tiling the multiple display devices 100, the multiple contact units CE are electrodes that electrically connect the first metal cover 180 and the second metal cover 190 of the display devices 100 that are adjacent to each other. The multiple contact units CE disposed on the side surface of each of the multiple display devices 100 can be formed to correspond to the contact units CE of another display device 100 adjacent to it, and can contact it during the formation of the tiled display device TD. For example, refer to Figure 1 The contact unit CE of the upper left display device 100 can contact the contact unit CE of the upper right display device 100 and the contact unit CE of the lower left display device 100 among the plurality of display devices 100. Although two contact units CE are shown in the figure on each of the four sides of the display device 100, the number, size and arrangement of the plurality of contact units CE can be implemented differently according to the design, and the present disclosure is not limited thereto.

[0065] Reference Figure 5 The connecting line CL is disposed along the side surface of the display panel 110. The connecting line CL extends along the side surface of the display panel 110 and can connect to a plurality of contact units CE formed in a display device 100. The connecting line CL can be configured to surround all side surfaces of the display panel 110 and connect to all of the plurality of contact units CE. Furthermore, as... Figure 4 As shown, a portion of the connecting line CL can extend to the flexible film 160 and the printed circuit board 170 on the rear surface of the display panel 110 and connect to the switching unit SW.

[0066] Reference Figure 4 A switching unit SW is disposed on one of the plurality of flexible films 160 and a printed circuit board 170. The switching unit SW is a component that selectively connects the connecting line CL and the plurality of contact units CE to the first metal cover 180 and the second metal cover 190. The plurality of contact units CE can be grounded by connecting via the switching unit SW to the first metal cover 180 and the second metal cover 190, which serve as a grounding structure, or they can be separated from and floated by the first metal cover 180 and the second metal cover 190. In this case, separate pads can be formed on the printed circuit board 170 to connect the switching unit SW to the first metal cover 180 and the second metal cover 190.

[0067] Among them, Figure 4In this diagram, the switching unit SW is shown located on the printed circuit board 170, but the switching unit SW may be disposed on multiple flexible films 160, and this disclosure is not limited thereto. Reference will be made later. Figures 7 to 9 A more detailed description of the switching unit SW.

[0068] In the following text, reference will be made to Figure 6 The structure of the multiple contact units CE and the display panel 110 is described in more detail.

[0069] Reference Figure 6 The display panel 110 includes a first substrate 111, a second substrate 112, a gate insulating layer 113, a passivation layer 114, an adhesive layer 115, a first planarization layer 116, a second planarization layer 117, a thin film transistor 120, a light-emitting element 130, a first electrode 141, a second electrode 142, a reflective layer 143, a low-potential power line VSS, a signal line 151, a connecting line 152, a side line 153, and a side insulating layer IN.

[0070] The first substrate 111 is a substrate that supports components disposed on the display device 100, and may be an insulating substrate. For example, the first substrate 111 may be formed of glass or resin. Furthermore, the first substrate 111 may be formed comprising a polymer or plastic. In some embodiments, the first substrate 111 may be formed of a flexible plastic material.

[0071] An active region AA and an active region NA surrounding the active region AA may be defined on the first substrate 111. However, in this disclosure, the active region AA and the active region NA are defined on the first substrate 111, but as mentioned above, the active region NA may be defined as not existing on the first substrate 111, and this disclosure is not limited thereto.

[0072] Multiple sub-pixels SP are defined in the active region AA of the first substrate 111, and a light-emitting element 130 and a thin-film transistor 120 are disposed in each of the multiple sub-pixels SP.

[0073] First, a thin-film transistor 120 is disposed on the upper surface of the first substrate 111. The thin-film transistor 120 includes a gate electrode 121, an active layer 122, a source electrode 123, and a drain electrode 124.

[0074] A gate electrode 121 is disposed on the first substrate 111. The gate electrode 121 may be formed of a conductive material such as copper (Cu), aluminum (Al), molybdenum (Mo), nickel (Ni), titanium (Ti), chromium (Cr), or alloys thereof. However, this disclosure is not limited thereto.

[0075] An active layer 122 is disposed on the gate electrode 121. The active layer 122 may be formed of a semiconductor material such as oxide semiconductor, amorphous silicon or polycrystalline silicon, but this disclosure is not limited thereto.

[0076] A gate insulating layer 113 is disposed between the gate electrode 121 and the active layer 122 to insulate the gate electrode 121 and the active layer 122. The gate insulating layer 113 may be formed of a single layer or multiple layers of silicon oxide (SiOx) or silicon nitride (SiNx), but this disclosure is not limited thereto.

[0077] Source electrode 123 and drain electrode 124 are disposed on active layer 122. Source electrode 123 and drain electrode 124 may be formed of conductive materials such as copper (Cu), aluminum (Al), molybdenum (Mo), nickel (Ni), titanium (Ti), chromium (Cr) or alloys thereof, and this disclosure is not limited thereto.

[0078] A passivation layer 114 for protecting the thin-film transistor 120 is disposed on the source electrode 123 and the drain electrode 124. The passivation layer 114 may be formed of a single layer or multiple layers of silicon oxide (SiOx) or silicon nitride (SiNx), but this disclosure is not limited thereto. However, according to embodiments, the passivation layer 114 may be omitted.

[0079] A low-potential power line VSS is disposed on the gate insulating layer 113. The low-potential power line VSS is a line used to apply a low-potential power supply voltage to the light-emitting element 130. The low-potential power line VSS may be formed of the same material as the source electrode 123 and the drain electrode 124 or the same material as the gate electrode 121, but this disclosure is not limited thereto.

[0080] A reflective layer 143 is disposed on the passivation layer 114. The reflective layer 143 is a layer for reflecting light emitted from the light-emitting element 130 toward the first substrate 111 toward the top of the display device 100 so as to emit light to the outside of the display device 100. The reflective layer 143 may be formed of a metallic material with high reflectivity.

[0081] An adhesive layer 115 is disposed on the reflective layer 143. The adhesive layer 115 is used to bond the light-emitting element 130 to the reflective layer 143 and can insulate the light-emitting element 130 from the reflective layer 143 formed of a metallic material. The adhesive layer 115 may be formed of a thermosetting material or a photocurable material, but this disclosure is not limited thereto.

[0082] The light-emitting element 130 is disposed on the adhesive layer 115. The light-emitting element 130 includes an n-type layer 131, a light-emitting layer 132, a p-type layer 133, an n-electrode 135, and a p-electrode 134. In the following description, an LED with a lateral structure is used as the light-emitting element 130, but the structure of the light-emitting element 130 is not limited thereto.

[0083] First, an n-type layer 131 can be formed by implanting an n-type impurity into gallium nitride (GaN), which has excellent crystallinity. A light-emitting layer 132 is disposed on the n-type layer 131. The light-emitting layer 132 is a light-emitting layer that emits light from the light-emitting element 130, and can be formed from a nitride semiconductor such as indium gallium nitride (InGaN). A p-type layer 133 is disposed on the light-emitting layer 132. The p-type layer 133 can be formed by implanting a p-type impurity into gallium nitride (GaN). However, the materials used to constitute the n-type layer 131, the light-emitting layer 132, and the p-type layer 133 are not limited to these.

[0084] As described above, the light-emitting element 130 is manufactured by sequentially stacking an n-type layer 131, a light-emitting layer 132, and a p-type layer 133, and then etching predetermined portions thereof to form an n-electrode 135 and a p-electrode 134. In this case, the predetermined portions are spaces used to separate the n-electrode 135 and the p-electrode 134 from each other, and the predetermined portions can be etched to expose a portion of the n-type layer 131. In other words, the surfaces of the light-emitting element 130 on which the n-electrode 135 and the p-electrode 134 are to be disposed can have different height levels, rather than having flat surfaces.

[0085] Therefore, the n-electrode 135 can be disposed on the etched area, i.e., on the n-type layer 131 exposed by the etching process. The n-electrode 135 can be formed of a conductive material, such as a transparent conductive oxide. The p-electrode 134 can be disposed on the unetched area, i.e., on the p-type layer 133. The p-electrode 134 can also be formed of a conductive material, such as a transparent conductive oxide. Furthermore, the p-electrode 134 can be formed of the same material as the n-electrode 135.

[0086] As described above, with the n-type layer 131, light-emitting layer 132, p-type layer 133, n-electrode 135, and p-electrode 134 formed, the light-emitting element 130 can be configured such that the n-type layer 131 is closer to the reflective layer 143 than the n-electrode 135 and the p-electrode 134.

[0087] Subsequently, a first planarization layer 116 is provided to planarize the upper part of the thin-film transistor 120 in the active region AA. The first planarization layer 116 may be formed to planarize the upper part of the region other than the region where the light-emitting element 130 is disposed and the contact hole.

[0088] A second planarization layer 117 is disposed on the first planarization layer 116. The second planarization layer 117 can be disposed in areas other than the contact holes and on the thin-film transistor 120 and the light-emitting element 130. In this case, the second planarization layer 117 can be formed such that portions of the p-electrode 134 and n-electrode 135 of the light-emitting element 130 are open. This disclosure describes the use of a first planarization layer 116 and a second planarization layer 117; however, a single planarization layer can be used instead of multiple planarization layers, and this disclosure is not limited thereto.

[0089] The first electrode 141 is an electrode for connecting the thin-film transistor 120 and the p-electrode 134 of the light-emitting element 130. The first electrode 141 contacts the source electrode 123 of the thin-film transistor 120 through contact holes formed in the first planarization layer 116, the second planarization layer 117, the passivation layer 114, and the adhesive layer 115, and contacts the p-electrode 134 of the light-emitting element 130 through contact holes formed in the second planarization layer 117. However, this disclosure is not limited thereto, and depending on the type of thin-film transistor 120, the first electrode 141 may be configured to contact the drain electrode 124 of the thin-film transistor 120.

[0090] The second electrode 142 is an electrode used to connect the low-potential power line VSS and the n-electrode 135 of the light-emitting element 130. The second electrode 142 contacts the low-potential power line VSS through contact holes formed in the first planarization layer 116, the second planarization layer 117, the passivation layer 114, and the adhesive layer 115, and contacts the n-electrode 135 of the light-emitting element 130 through contact holes formed in the second planarization layer 117.

[0091] Therefore, when the display device 100 is turned on, the different voltage levels applied to the source electrode 123 and the low-potential power line VSS of the thin-film transistor 120 can be transmitted to the p electrode 134 and the n electrode 135 through the first electrode 141 and the second electrode 142, so that the light-emitting element 130 can emit light.

[0092] The second substrate 112 is disposed below the first substrate 111. The second substrate 112 is a substrate that supports components disposed below the display device 100, and may be an insulating substrate. For example, the second substrate 112 may be formed of glass or resin. Furthermore, the second substrate 112 may be formed comprising a polymer or plastic. The second substrate 112 may be formed of the same material as the first substrate 111. In some embodiments, the second substrate 112 may be formed of a flexible plastic material.

[0093] A bonding layer 118 is disposed between the first substrate 111 and the second substrate 112. The bonding layer 118 may be formed of a material capable of bonding the first substrate 111 and the second substrate 112 by curing via various curing methods. The bonding layer 118 may be disposed over the entire area between the first substrate 111 and the second substrate 112, or it may be disposed only over a portion of the area between them.

[0094] Signal line 151 is disposed in the non-active region NA of the first substrate 111. Signal line 151 is a line that transmits various signals to multiple sub-pixels SP of the active region AA. Signal line 151 can extend from the active region AA to the non-active region NA. Signal line 151 extending from the active region AA to the non-active region NA can extend to the end of the first substrate 111. For example, signal line 151 may include gate line, data line, low-potential power line VSS, high-potential power line, etc., but this disclosure is not limited thereto.

[0095] Multiple interconnect lines 152 are disposed on the rear surface of the second substrate 112. These interconnect lines 152 are used to electrically connect multiple signal lines 151 formed on the upper surface of the first substrate 111 to multiple flexible films 160 and printed circuit boards 170 bonded to the rear surface of the second substrate 112. The interconnect lines 152 can extend from an end of the second substrate 112 towards its center. One end of the interconnect line 152 can be disposed at an end of the second substrate 112, and the other end of the interconnect line 152 can be connected to pads to which the multiple flexible films 160 are bonded.

[0096] Multiple side lines 153 are disposed on the side surface of the display panel 110. The multiple side lines 153 can connect the signal lines 151 formed on the upper surface of the first substrate 111 and the link lines 152 formed on the rear surface of the second substrate 112. For example, the multiple side lines 153 can be formed by a printing method using conductive paste, but the present disclosure is not limited thereto.

[0097] In this configuration, a plurality of sub-pixels SP disposed on the front surface of the display panel 110 and a plurality of flexible films 160 disposed on the rear surface of the display panel 110 can be electrically connected to each other via side lines 153 connecting the front, side, and rear surfaces of the display panel 110. For example, pads to which the plurality of flexible films 160 are bonded are formed on the rear surface of the display panel 110, and the plurality of side lines 153 extending from the front surface of the display panel 110 to the side and rear surfaces of the display panel 110 can be connected to both signal lines 151 connected to the plurality of sub-pixels SP and link lines 152 connected to the pads, thereby enabling the plurality of sub-pixels SP and the plurality of flexible films 160 to be electrically connected.

[0098] A side insulating layer IN is provided to cover multiple side lines 153. The side insulating layer IN can be formed to cover the side lines 153 on the upper surface of the first substrate 111, the side surfaces of the first substrate 111 and the second substrate 112, and the rear surface of the second substrate 112. The side insulating layer IN can protect the multiple side lines 153 and insulate the multiple side lines 153 from the multiple contact units CE.

[0099] When the multiple side lines 153 are formed of a metallic material, external light may be reflected from the multiple side lines 153, or the following defect may occur: light emitted from the light-emitting element 130 may be reflected from the multiple side lines 153 and become visible to the user. Therefore, the side insulating layer IN is configured to include a black material, thereby suppressing the reflection of external light.

[0100] Multiple contact units CE are disposed on the side insulating layer IN on the side surface of the display panel 110. For example... Figure 1 As shown, when a tiled display device TD is formed, the contact unit CE disposed on the side insulating layer IN on the side surface of the display panel 110 can contact the contact unit CE of the adjacent display device 100. In this case, considering that the multiple contact units CE are selectively connected to the electrodes of the first metal cover 180 and the second metal cover 190, and that the multiple side lines 153 are lines through which various signals are transmitted, the side insulating layer IN can be formed between the multiple contact units CE and the multiple side lines 153 to insulate the multiple contact units CE and the multiple side lines 153.

[0101] Although not shown in the figure, connection lines CL connecting to the multiple contact units CE can also be formed on the side insulating layer IN. The connection lines CL can be formed on the side insulating layer IN on the side surface of the display panel 110 to connect the multiple contact units CE to each other. Additionally, a portion of the connection lines CL can extend toward the rear surface of the second substrate 112 and can be connected to the switching units SW located on the multiple flexible films 160 and the printed circuit board 170 via pads on the rear surface of the second substrate 112.

[0102] In the accompanying drawings, for ease of description, each of the plurality of contact units CE is shown as having a certain thickness, but the plurality of contact units CE are electrodes with very thin thickness, and therefore their influence on the distance between the plurality of display devices 100 can be small. That is, because the plurality of contact units CE have a very thin thickness, the increase in the distance between the plurality of display devices 100 caused by the plurality of contact units CE can be minimized.

[0103] In the following text, reference will be made to Figures 7 to 9 Describe the connection method of the grounding structure in the tiled display device TD according to the operation of the switching unit SW.

[0104] Figure 7 This is a schematic configuration diagram of the switching unit and multiple contact units of a display device according to an exemplary embodiment of the present disclosure. Figure 8 and Figure 9 This is a plan view of a tiled display device according to an exemplary embodiment of the present disclosure. Specifically, Figure 8 This is a diagram showing the ground plane GNDS when all the switching units SW of a plurality of display devices 100 in an exemplary embodiment of the tiled display device TD according to the present disclosure are turned on. Figure 9 This is a diagram showing the ground plane GNDS when all the switching units SW of the multiple display devices 100 are turned off. Figure 8 and Figure 9 In the diagram, for ease of description, the contact units CE electrically connected to the first metal cover 180 and the second metal cover 190 are indicated by black shading, and the contact units CE electrically disconnected from the first metal cover 180 and the second metal cover 190 and in a floating state are shown only as dashed lines without shading.

[0105] Reference Figure 7 Multiple contact units CE disposed on a display device 100 can be connected to switch units SW via connecting lines CL. Switch units SW can be disposed on multiple flexible films 160 or printed circuit boards 170. Connecting lines CL can be connected to multiple switch units SW disposed on multiple flexible films 160 or printed circuit boards 170 via multiple pads formed on the rear surface of the display panel 110.

[0106] The switch unit SW can selectively connect multiple contact units CE to the first metal cover 180 and the second metal cover 190, which serve as panel grounds. For example, when the switch unit SW is on, the multiple contact units CE can be connected to the first metal cover 180 and the second metal cover 190 and grounded through the switch unit SW. Conversely, when the switch unit SW is off, the multiple contact units CE can be disconnected from the first metal cover 180 and the second metal cover 190 and float. Therefore, by controlling the switch unit SW to selectively connect multiple contact units CE to the first metal cover 180 and the second metal cover 190, the multiple contact units CE can be either floated or grounded.

[0107] The grounding structure between the multiple display devices 100 constituting the tiled display device TD can be selectively connected using a switching unit SW. For example, in a pair of display devices 100 that are adjacent to each other and have contact units CE that are in contact with each other, when the switching unit SW is turned on, the first metal cover 180 and the second metal cover 190 of the pair of corresponding display devices 100 can be electrically connected to each other. Conversely, when the switching unit SW is turned off in the pair of display devices 100 whose contact units CE are in contact with each other, each of the contact units CE is floating, and therefore the first metal cover 180 and the second metal cover 190 of the pair of corresponding display devices 100 can be electrically disconnected from each other.

[0108] For example, refer to Figure 8 When the switch unit SW is turned on in all of the multiple display devices 100, multiple contact units CE between the multiple display devices 100 are connected to the first metal cover 180 and the second metal cover 190 of the multiple corresponding display devices 100. Furthermore, the first metal cover 180 and the second metal cover 190 of each of the multiple display devices 100 can be connected to the first metal cover 180 and the second metal cover 190 of another display device 100 via multiple contact units CE. Therefore, the first metal covers 180 and the second metal cover 190 of the multiple corresponding display devices 100 are connected to each other via multiple contact units CE, thus forming a ground plane GNDS with a shape corresponding to the overall shape of the multiple display devices 100. For example, when the switch unit SW is turned on in all four display devices 100, the first metal covers 180 and the second metal covers 190 of the four display devices 100 are connected to each other via contact units CE, so that the panel grounds of the four display devices 100 can be connected together, and a ground plane GNDS and an antenna corresponding to the four display devices 100 can be formed. Therefore, when the switch unit SW is turned on, the first metal cover 180 and the second metal cover 190, which are grounding structures of multiple corresponding display devices 100, can be connected to each other, thereby reducing the panel grounding potential difference.

[0109] Reference Figure 9When all the switching units SW in the multiple display devices 100 are turned off, the multiple contact units CE between the multiple display devices 100 can be electrically disconnected from the first metal covers 180 and second metal covers 190 of the multiple corresponding display devices 100. The first metal cover 180 and second metal cover 190 of each of the multiple display devices 100 can be electrically disconnected from the first metal cover 180 and second metal cover 190 of the other display device 100. The first metal cover 180 and second metal cover 190 of one display device 100 can be not electrically connected to the first metal cover 180 and second metal cover 190 of the other display device 100. For example, when the switching units SW in all four display devices 100 are turned off, the first metal covers 180 and second metal covers 190 of the four display devices 100 can remain in a separated state, and four ground plane GNDS and four antennas corresponding to the four display devices 100 can be formed respectively. In other words, a first ground plane GNDSa corresponding to the upper left display device 100, a second ground plane GNDSb corresponding to the upper right display device 100, a third ground plane GNDSc corresponding to the lower left display device 100, and a fourth ground plane GNDSd corresponding to the lower right display device 100 can be independently formed. That is, each display device 100 can have a different panel ground. Therefore, when the switching unit SW is turned off, the first metal cover 180 and the second metal cover 190 of the multiple display devices 100 are electrically separated from each other, thereby forming multiple ground planes GNDSa, GNDScb, GNDSc, and GNDDSd corresponding to the multiple display devices 100 respectively.

[0110] Although not shown in the figures, an RC filter may be further provided between the switching unit SW and the first metal cover 180 and the second metal cover 190. The RC filter connected to the first metal cover 180 and the second metal cover 190 can be configured to more stably control signal noise, but this disclosure is not limited thereto.

[0111] Therefore, in the display device 100 and the tiled display device TD according to the exemplary embodiments of the present disclosure, by connecting the first metal cover 180 and the second metal cover 190 of the plurality of corresponding display devices 100 constituting the tiled display device TD, signal noise can be reduced by minimizing the potential difference between the panel grounds. Each of the plurality of display devices 100 includes the first metal cover 180 and the second metal cover 190 as a grounding structure, which are metal elements. However, the grounding structure is also a signal source, and when the plurality of corresponding display devices 100 have independent grounding structures, a potential difference between the panel grounds may occur in the plurality of corresponding display devices 100. In addition, this potential difference may cause additional signal noise, and thus the driving reliability of the tiled display device TD may be reduced. Therefore, a plurality of contact units CE connected to the first metal cover 180 and the second metal cover 190 are formed on the side surfaces of the plurality of display devices 100, and the first metal cover 180 and the second metal cover 190 of the plurality of corresponding display devices 100 can be electrically connected to each other through the plurality of contact units CE. Therefore, in the display device 100 and tiled display device TD according to the exemplary embodiments of the present disclosure, a plurality of contact units CE are formed between the plurality of display devices 100, so that the panel grounds of the plurality of corresponding display devices 100 can be electrically connected, and the potential difference between the plurality of display devices 100 can be minimized.

[0112] As mentioned above, signal noise caused by electromagnetic interference can include noise generated when the channel output is produced and noise formed along the path the signal travels. Depending on the length or shape of the path, the noise formed along the signal path may have different noise characteristics for each frequency. In this case, the noise at each frequency can be amplified or reduced depending on the shape of the antenna. For example, the shape of the antenna that reduces noise at a specific frequency and the shape of the antenna that reduces noise at other frequencies can be different from each other. Therefore, by utilizing a fixed connection structure with a grounded structure, i.e., a fixed antenna shape, signal noise at only certain frequencies can be addressed.

[0113] Therefore, in the display device 100 and the tiled display device TD according to the exemplary embodiments of the present disclosure, the shape of the antenna radiating signal noise can be controlled differently according to the characteristics of each frequency of the signal noise. Specifically, the signal noise characteristics can vary depending on the number of display devices 100 constituting the tiled display device TD, their connection structure, and the specifications of the respective display devices 100. In this case, the first metal covers 180 and second metal covers 190 of the plurality of respective display devices 100 can be connected to each other using a plurality of contact units CE formed on the side surface of each of the plurality of display devices 100 constituting the tiled display device TD. For example, a switch unit SW is turned on to connect the first metal covers 180 and second metal covers 190 of the plurality of display devices 100 to each other, thereby forming a single antenna corresponding to the entire tiled display device TD. By turning off the switch unit SW, the first metal covers 180 and second metal covers 190 of the plurality of respective display devices 100 are electrically isolated from each other, and a plurality of antennas corresponding to the plurality of respective display devices 100 can be formed. Therefore, in the display device 100 and the tiled display device TD according to the exemplary embodiments of the present disclosure, the switching unit SW is turned on or off to change the connection structure of the first metal cover 180 and the second metal cover 190 between the plurality of display devices 100, and the antenna structure can be implemented differently taking into account the characteristics of the signal noise at each frequency.

[0114] Figure 10 This is a schematic rear view of a display device and a tiled display device according to another exemplary embodiment of this disclosure. Since, apart from the switching unit SW, Figure 10 Other configurations of the display device 1000 and Figures 1 to 9 The configuration of the display device 100 is basically the same, therefore its repeated description will be omitted. Figure 10 For ease of description, the first metal cover 180 and the second metal cover 190 are omitted.

[0115] Reference Figure 10 Multiple switch units SW connected to multiple contact units CE are disposed on printed circuit board 170. Each of the multiple switch units SW can be connected to at least one contact unit CE. The multiple switch units SW include a first switch unit SW1, a second switch unit SW2, a third switch unit SW3, and a fourth switch unit SW4 connected to different contact units CE.

[0116] For example, the first switch unit SW1 can be connected to two contact units CE located on the upper surface of the display device 1000, the second switch unit SW2 can be connected to two contact units CE located on the lower surface of the display device 1000, the third switch unit SW3 can be connected to two contact units CE located on the left side surface of the display device 1000, and the fourth switch unit SW4 can be connected to two contact units CE located on the right side surface of the display device 1000. Therefore, the contact units CE provided on the upper, lower, left, and right surfaces of the display device 1000 can be connected to different switch units SW and controlled independently.

[0117] When the plurality of display devices 1000 constituting the tiled display device TD includes a first display device 1000a located at the upper left, a second display device 1000b located at the upper right, a third display device 1000c located at the lower left, and a fourth display device 1000d located at the lower right, each of the switching units SW of the first display device 1000a, the second display device 1000b, the third display device 1000c, and the fourth display device 1000d can be controlled, so that the plurality of display devices 1000 can be selectively connected.

[0118] For example, when only the first metal cover 180 and the second metal cover 190 of the first display device 1000a, the second display device 1000b, and the fourth display device 1000d are connected, only the fourth switch unit SW4 of the first display device 1000a, the second switch unit SW2 and the third switch unit SW3 of the second display device 1000b, and the first switch unit SW1 of the fourth display device 1000d can be turned on. Specifically, when the fourth switch unit SW4 connected to the contact unit CE on the right side surface of the first display device 1000a and the third switch unit SW3 connected to the contact unit CE on the left side surface of the second display device 1000b are turned on, the first metal cover 180 and the second metal cover 190 of the first display device 1000a and the first metal cover 180 and the second metal cover 190 of the second display device 1000b can be connected to each other through the contact unit CE on the right side surface of the first display device 1000a and the contact unit CE on the left side surface of the second display device 1000b. Furthermore, when the second switch unit SW2 connected to the contact unit CE on the lower surface of the second display device 1000b and the first switch unit SW1 connected to the contact unit CE on the upper surface of the fourth display device 1000d are turned on, the first metal cover 180 and the second metal cover 190 of the second display device 1000b and the first metal cover 180 and the second metal cover 190 of the fourth display device 1000d can be connected to each other through the contact unit CE on the lower surface of the second display device 1000b and the contact unit CE on the upper surface of the fourth display device 1000d. Therefore, the antenna of the tiled display device TD can be configured to have a first ground plane GNDSa and a second ground plane GNDSa corresponding to the third display device 1000c. The first ground plane GNDSa is formed by connecting the first metal cover 180 and the second metal cover 190 of the first display device 1000a, the second display device 1000b and the fourth display device 1000d and has shape.

[0119] Therefore, in another exemplary embodiment of the display device 1000 and the tiled display device TD according to this disclosure, the corresponding contact units CE of the plurality of contact units CE are connected to different switch units SW, so that the connection structure between the display devices 1000 can be implemented in more diverse ways. Specifically, by connecting the contact units CE disposed on the four sides of the display device 1000 to different switch units SW, a display device 1000 can be selectively connected to other display devices 1000 disposed on the upper, lower, left, and right sides of the one display device 1000. For example, only the fourth switch unit SW4 connected to the contact unit CE disposed on the right side surface of the first display device 1000a and the third switch unit SW3 connected to the contact unit CE located on the left side surface of the second display device 1000b can be turned on, so that only the first metal cover 180 and the second metal cover 190 of the first display device 1000a and the second display device 1000b are electrically connected. Therefore, the connection structure of the grounding structure between multiple display devices 1000 arranged in a matrix can be changed by connecting multiple contact units CE disposed on the four sides of the display device 1000 to different switching units SW. Thus, in another exemplary embodiment of the display device 1000 and the tiled display device TD according to this disclosure, various antenna structures can be formed by connecting corresponding contact units CE among the multiple contact units CE to different switching units SW, thereby effectively controlling signal noise at various frequencies.

[0120] Figure 11 This is a plan view of a display device and a tiled display device according to another exemplary embodiment of the present disclosure. Since, in addition to the plurality of contact units CE, Figure 11 Other configurations of the display device 1100 and Figures 1 to 9 The display device 100 is basically the same as the display device 100, so repeated descriptions will be omitted.

[0121] Reference Figure 11 Each of the plurality of display devices 1100 constituting a tiled display device TD includes a plurality of contact units CE. At least some of the plurality of contact units CE disposed on a display device 1100 may be configured in an asymmetrical structure with respect to the contact units CE of adjacent display devices 1100.

[0122] For example, the plurality of contact units CE disposed on each of the plurality of display devices 1100 may include one contact unit CE disposed at the center of the upper surface of the display device 1100, two contact units CE disposed on the lower surface of the display device 1100, and two contact units CE disposed on the left and right surfaces of the display device 1100.

[0123] In this case, since the number and position of the contact units CE on the upper and lower surfaces of each of the plurality of display devices 1100 are different, a display device 1100 can selectively connect only to the grounding structure of the adjacent display devices 1100 located to its left and right. For example, the contact unit CE on the right surface of the first display device 1100a located in the upper left can contact and correspond to the contact unit CE on the left surface of the second display device 1100b located in the upper right of the plurality of display devices 1100. Therefore, in the first display device 1100a and the second display device 1100b, the first metal cover 180 and the second metal cover 190 can be connected to each other through the contact units CE on their right and left surfaces. On the other hand, the contact unit CE on the lower surface of the first display device 1100a may not correspond to the contact unit CE on the upper surface of the third display device 1100c located in the lower left of the plurality of display devices 1100, and may be set to be offset from the contact unit CE on the upper surface of the third display device 1100c. Furthermore, the contact units CE on the lower surface of the second display device 1100b and the contact units CE on the upper surface of the fourth display device 1100d can be offset from each other. Therefore, the first display device 1100a and the third display device 1100c, as well as the second display device 1100b and the fourth display device 1100d, are arranged adjacent to each other, but their contact units CE are offset from each other, so that they cannot be connected to each other.

[0124] Among them, although Figure 11 The plurality of contact units CE disposed on the upper and lower surfaces of each of the plurality of display devices 1100 have an asymmetrical structure, but the plurality of contact units CE on the left and right surfaces can be formed in an asymmetrical structure, and the contact units CE in the asymmetrical structure can be formed only in some of the plurality of display devices 1100, but the present disclosure is not limited thereto.

[0125] Therefore, in another exemplary embodiment of the display device 1100 and the tiled display device TD according to this disclosure, the plurality of contact units CE between adjacent display devices 1100 are formed in a symmetrical or asymmetrical structure. The first metal cover 180 and the second metal cover 190 of the plurality of display devices 1100 can be selectively connected. For example, when the first metal cover 180 and the second metal cover 190 of the display devices 1100 adjacent to each other in the row direction are connected to each other, the plurality of contact units CE provided on the left and right surfaces of each of the plurality of display devices 1100 can be formed in a symmetrical structure, and the plurality of contact units CE provided on the upper and lower surfaces of each of the plurality of display devices 1100 can be formed in an asymmetrical structure. In addition, when the plurality of display devices 1100 are arranged to form a tiled display device TD, the display devices 1100 adjacent to each other in the row direction can be connected to each other through the contact units CE with a symmetrical structure, but the display devices 1100 adjacent to each other in the column direction will not be connected to each other through the contact units CE with asymmetrical structure. Therefore, in the display device 1100 and the tiled display device TD according to another exemplary embodiment of the present disclosure, by changing the position of the multiple contact units CE, the multiple switching units SW can be omitted or simplified, and the connection relationship between the first metal cover 180 and the second metal cover 190 between the multiple display devices 1100 can be controlled.

[0126] Figure 12 This is a rear view of a display device according to yet another exemplary embodiment of the present disclosure. Figure 13 This is a cross-sectional view of a display device according to yet another exemplary embodiment of the present disclosure. Since, in addition to the connecting lines CL, Figure 12 and Figure 13 Other configurations of the display device 1200 and Figures 1 to 9 The display device 100 is basically the same as the display device 100, so repeated descriptions will be omitted.

[0127] Reference Figure 12 and Figure 13 A connecting line CL, connecting multiple contact units CE and switching units SW, is disposed on the rear surface of the display panel 110. The connecting line CL may be disposed on the rear surface of the second substrate 112 to correspond to the non-active region NA of the display panel 110. The connecting line CL may extend from the rear surface of the display panel 110 along the edge of the display panel 110. Furthermore, a portion of the connecting line CL may extend from the rear surface of the display panel 110 toward the side surface of the display panel 110 and connect to each of the multiple contact units CE on the side surface of the display panel 110.

[0128] Although not shown in the figures, the connecting line CL can be configured not to interfere with the first metal cover 180 disposed on the rear surface of the display panel 110. For example, the first metal cover 180 is configured to have a size smaller than that of the second substrate 112 of the display panel 110, and the connecting line CL can be disposed on the rear surface of the second substrate 112 that protrudes outward from the first metal cover 180. In another example, when the connecting line CL and the first metal cover 180 overlap, a separate insulating layer is formed between the connecting line CL and the first metal cover 180, thereby preventing direct connection between the first metal cover 180 and the connecting line CL, rather than the switching unit SW.

[0129] Therefore, in the display device 1200 and tiled display device TD according to another exemplary embodiment of the present disclosure, a connecting line CL connecting each of the plurality of contact units CE to the switching unit SW can be formed on the rear surface of the display panel 110. Specifically, a display device 1200 includes a plurality of contact units CE formed on the side surface of the display panel 110 to contact the contact units CE of another display device 1200. Furthermore, the plurality of contact units CE can be connected to the switching unit SW via the connecting line CL. In this case, the connecting line CL can be formed on the rear surface of the display panel 110 to connect the plurality of contact units CE on the side surface of the display panel 110 and the switching unit SW on the rear surface of the display panel 110. In this case, the connecting line CL can be easily arranged by utilizing the free space on the rear surface of the display panel 110. Therefore, in the display device 1200 and tiled display device TD according to another exemplary embodiment of the present disclosure, the position of the plurality of contact units CE is not limited, and the connecting line CL is formed by utilizing the free space on the rear surface of the display panel 110, thereby increasing the degree of design freedom.

[0130] Figure 14 This is a cross-sectional view of a display device according to yet another exemplary embodiment of the present disclosure. Since, in addition to the connecting lines CL, Figure 14 Other configurations of the display device 1400 and Figure 12 and Figure 13 The display device 1200 is basically the same, so repeated descriptions will be omitted.

[0131] Reference Figure 14A connecting line CL, connecting multiple contact units CE and switching units SW, is disposed on the front surface of the display panel 110. The connecting line CL may be disposed on the front surface of the first substrate 111 to correspond to the non-active area NA of the display panel 110. The connecting line CL may extend from the front surface of the display panel 110 along the edge of the display panel 110. Furthermore, a portion of the connecting line CL may extend from the front surface of the display panel 110 to the side surface of the display panel 110 and connect to each of the multiple contact units CE on the side surface of the display panel 110.

[0132] Therefore, in the display device 1400 and tiled display device TD according to another exemplary embodiment of the present disclosure, a connection line CL connecting each of the plurality of contact units CE to the switching unit SW can be formed on the front surface of the display panel 110. The connection line CL can be formed in a non-active region NA adjacent to the edge of the front surface of the display panel 110, that is, formed in free space, and connected to the plurality of contact units CE on the side surface of the display panel 110. The connection line CL can be easily arranged by utilizing the free space on the front surface of the display panel 110. In addition, since the first metal cover 180 on the rear surface of the display panel 110 and the connection line do not interfere with each other, the design freedom of the connection line CL can be further improved. Therefore, in the display device 1400 and tiled display device TD according to another exemplary embodiment of the present disclosure, the position of the plurality of contact units CE is not restricted, and the design freedom can be improved by utilizing the free space on the front surface of the display panel 110 to form the connection line CL.

[0133] Exemplary embodiments of this disclosure can also be described as follows:

[0134] A display device according to an exemplary embodiment of the present disclosure includes: a display panel; a plurality of contact units disposed on a side surface of the display panel; a metal cover disposed on a rear surface of the display panel and grounded; and a connecting wire disposed between the metal cover and the plurality of contact units.

[0135] The connecting cable can be installed along the side surface of the display panel.

[0136] The connecting wire can be disposed on the rear surface of the display panel, and a portion of the connecting wire can extend from the rear surface of the display panel to the side surface of the display panel, and can be connected to multiple contact units.

[0137] The connecting wire can be placed on the front surface of the display panel, and a portion of the connecting wire can extend from the front surface of the display panel to the side surface of the display panel, and can be connected to multiple contact units.

[0138] The display device may also include a switch unit connected between the connecting wire and the metal cover, wherein when the switch unit is turned on, a plurality of contact units may be electrically connected to the metal cover, and when the switch unit is turned off, the plurality of contact units may be floating.

[0139] The display device may further include: a plurality of flexible films electrically connected to one end of the display panel; and a printed circuit board electrically connected to the plurality of flexible films, wherein the switching unit is disposed on any one of the plurality of flexible films and the printed circuit board.

[0140] The metal cover may include: a first metal cover disposed on the rear surface of the display panel and having an opening; and a second metal cover covering a plurality of flexible films and a printed circuit board, one end of each of the plurality of flexible films being coupled to the rear surface of the display panel exposed through the opening, and the plurality of flexible films and the printed circuit board being disposed between the first metal cover and the second metal cover.

[0141] A switching unit may include multiple switching units, a portion of which may be connected to one of the multiple switching units, and another portion of which may be connected to another of the multiple switching units.

[0142] Another exemplary embodiment of the present disclosure of a tiled display device includes: a plurality of display devices arranged in a tiled manner; and a plurality of contact units disposed on a side surface of each of the plurality of display devices, each of the plurality of display devices including: a display panel on the side surface of which the plurality of contact units are disposed; and a metal cover disposed on a rear surface of the display panel, wherein the metal covers of the plurality of display devices are selectively connected to each other via the plurality of contact units. For example, each of the plurality of display devices may further include a switch unit for selectively connecting the plurality of contact units to the metal cover.

[0143] Multiple contact units of each of the multiple display devices can contact multiple contact units of the adjacent display devices in a symmetrical structure.

[0144] At least some of the contact units of each of the plurality of display devices can be configured to be offset from the plurality of contact units of the adjacent display device in an asymmetrical structure.

[0145] The multiple display devices may include a first display device and a second display device. The first display device and the second display device are arranged adjacent to each other and have multiple contact units disposed on their side surfaces and in contact with each other. When the switching unit of the first display device and the switching unit of the second display device are turned on, the metal cover of the first display device and the metal cover of the second display device can be electrically connected to each other through the multiple contact units.

[0146] When the switching unit of the first display device and the switching unit of the second display device are turned off, multiple contact units can be floated, and the metal cover of the first display device and the metal cover of the second display device can be electrically separated from each other.

[0147] In one of a plurality of display devices, multiple contact units may be connected to a single switch unit.

[0148] In one of a plurality of display devices, a switching unit may include a plurality of switching units, and each of the plurality of contact units may be connected to a different switching unit among the plurality of switching units.

[0149] The plurality of switching units may include: a first switching unit connected to a contact unit disposed on the upper surface of the display panel among the plurality of contact units; a second switching unit connected to a contact unit disposed on the lower surface of the display panel among the plurality of contact units; a third switching unit connected to a contact unit disposed on the left side surface of the display panel among the plurality of contact units; and a fourth switching unit connected to a contact unit disposed on the right side surface of the display panel among the plurality of contact units.

[0150] When only the first and second switching units of each of the multiple display devices are turned on, the metal covers of the display devices that are only vertically adjacent can be electrically connected to each other.

[0151] When only the third and fourth switch units of each of the multiple display devices are turned on, the metal covers of only the left and right adjacent display devices among the multiple display devices can be electrically connected to each other.

[0152] 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 many different 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 exemplary embodiments are illustrative in all respects and do not limit the present disclosure.

Claims

1. A display device, comprising: Display panel; Multiple contact units are disposed on the side surface of the display panel; A metal cover, which is disposed on the rear surface of the display panel and grounded; A connecting wire is disposed between the metal cover and the plurality of contact units; as well as A switching unit is connected between the connecting wire and the metal cover. When the switch unit is turned on, the plurality of contact units are electrically connected to the metal cover, and When the switching unit is turned off, the plurality of contact units are floating.

2. The display device according to claim 1, wherein, The connecting line is arranged along the side surface of the display panel.

3. The display device according to claim 1, wherein, The connecting line is disposed on the rear surface of the display panel, and a portion of the connecting line extends from the rear surface of the display panel toward the side surface of the display panel and is connected to the plurality of contact units.

4. The display device according to claim 1, wherein, The connecting line is disposed on the front surface of the display panel, and a portion of the connecting line extends from the front surface of the display panel to the side surface of the display panel and is connected to the plurality of contact units.

5. The display device according to claim 1, further comprising: Multiple flexible films electrically connected to one end of the display panel; as well as A printed circuit board electrically connected to the plurality of flexible films, The switching unit is disposed on any one of the plurality of flexible films and the printed circuit board.

6. The display device according to claim 5, wherein, The metal cap includes: A first metal cover, disposed on the rear surface of the display panel and having an opening; and A second metal cover covers the plurality of flexible films and the printed circuit board. Wherein, one end of each of the plurality of flexible films is bonded to the rear surface of the display panel exposed through the opening, and The plurality of flexible films and the printed circuit board are disposed between the first metal cover and the second metal cover.

7. The display device according to claim 1, wherein, The switching unit includes multiple switching units. Wherein, a portion of the plurality of contact units is connected to one of the plurality of switch units, and Another part of the plurality of contact units is connected to another switch unit among the plurality of switch units.

8. A tiled display device, comprising: Multiple display devices arranged in a tiled manner; as well as Multiple contact units are disposed on the side surface of each of the multiple display devices. Each of the plurality of display devices includes: A display panel, wherein the plurality of contact units are disposed on the side surface of the display panel; and A metal cover, the metal cover being disposed on the rear surface of the display panel. The metal covers of the plurality of display devices are selectively connected to each other via the plurality of contact units, and Each of the plurality of display devices further includes a switching unit for selectively connecting the plurality of contact units to the metal cover.

9. The tiled display device according to claim 8, wherein, The metal cover of each of the plurality of display devices is grounded.

10. The tiled display device according to claim 8, wherein, Each of the plurality of display devices has a plurality of contact units in a symmetrical structure that contact a plurality of contact units of an adjacent display device.

11. The tiled display device according to claim 8, wherein, At least some of the contact units of each of the plurality of display devices are configured to be offset from the plurality of contact units of the adjacent display device in an asymmetrical structure.

12. The tiled display device according to claim 8, wherein, The plurality of display devices includes a first display device and a second display device, which are arranged adjacent to each other, and a plurality of contact units disposed on the side surface of the display panel of the first display device respectively contact a plurality of contact units disposed on the side surface of the display panel of the second display device. When the switching units of the first display device and the second display device are turned on, the metal covers of the first display device and the second display device are electrically connected to each other through a plurality of contact units corresponding to the first display device and the second display device.

13. The tiled display device according to claim 12, wherein, When the switching units of the first display device and the second display device are turned off, a plurality of contact units corresponding to the first display device and the second display device are floated, and the metal covers of the first display device and the second display device are electrically separated from each other.

14. The tiled display device according to claim 8, wherein, In one of the plurality of display devices, the plurality of contact units are connected to a switch unit.

15. The tiled display device according to claim 8, wherein, In one of the plurality of display devices, the switching unit includes a plurality of switching units, and the plurality of contact units are respectively connected to the plurality of switching units.

16. The display device according to claim 15, wherein, The plurality of switching units include: A first switching unit is connected to one of the plurality of contact units disposed on the upper surface of the display panel. The second switch unit is connected to one of the plurality of contact units disposed on the lower surface of the display panel. A third switching unit, the third switching unit being connected to one of the plurality of contact units disposed on the left side surface of the display panel; and A fourth switch unit is connected to one of the plurality of contact units disposed on the right side surface of the display panel.

17. The tiled display device according to claim 16, wherein, When only the first and second switching units of each of the plurality of display devices are turned on, the metal covers of the display devices that are only vertically adjacent are electrically connected to each other.

18. The tiled display device according to claim 17, wherein, When only the third and fourth switch units of each of the plurality of display devices are turned on, the metal covers of only the left and right adjacent display devices are electrically connected to each other.

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