Display device

Abstract

A display device according to an embodiment of the present disclosure includes: a stacking portion; a cover glass disposed on the stacked portion; a side sealing portion disposed on a side surface of the stacked portion; and a coating layer disposed between the stacked portion and the side sealing portion and including a hydrophobic material, in which the stacked portion includes a substrate and an intermediate layer disposed on the substrate and including a sub-intermediate layer and a lower adhesive layer disposed on the sub-intermediate layer. Therefore, abnormal deformation of the display panel can be prevented.

Description

[0001] Cross-references to related applications

[0002] This application claims priority to Korean Patent Application No. 10-2024-0110978, filed on August 20, 2024, which is incorporated herein by reference for all purposes as fully set forth herein. Technical Field

[0003] Embodiments of this disclosure relate to display devices. Background Technology

[0004] Display devices are used in a variety of electronic devices, such as TVs, mobile phones, laptops, and tablets. Display devices include self-emissive organic light-emitting displays (OLEDs) and liquid crystal displays (LCDs) that require a separate light source.

[0005] Meanwhile, display devices can have structures with stacked insulating layers and various metal layers, and the sides of these stacked structures may be susceptible to external impacts. Furthermore, when a display device includes an organic layer formed from organic materials, this organic layer may degrade more rapidly due to oxygen or moisture. This could shorten the lifespan of the display device or reduce image quality. Summary of the Invention

[0006] Embodiments of this disclosure may provide a display device having a side-sealing portion as a structure for protecting the sides of stacked portions in a display panel from external impacts.

[0007] Embodiments of this disclosure may provide a display device that further includes a coating as a structure for addressing cracks and / or delamination in the interlayer interface portion caused by differences in coupling characteristics between the side sealing portion and the layers in the stacked portion included in the display panel during temperature variations.

[0008] Embodiments of this disclosure may provide a display device that, by providing a coating including a hydrophobic material, can more effectively prevent cracks and / or delamination in the interlayer interface portion of the display panel.

[0009] The display device according to embodiments of the present disclosure may include: a stacked portion; a cover glass disposed on the stacked portion; a side sealing portion disposed on a side surface of the stacked portion; and a coating disposed between the stacked portion and the side sealing portion and comprising a hydrophobic material, wherein the stacked portion includes a substrate and an intermediate layer, the intermediate layer being disposed on the substrate and including a sub-intermediate layer and a lower adhesive layer disposed on the sub-intermediate layer.

[0010] A display device according to an embodiment of the present disclosure may include: a stacked portion having a curved region; an inner sealing portion disposed inside the stacked portion in the curved region; an outer sealing portion disposed outside the stacked portion in the curved region; an inner coating disposed between the stacked portion and the inner sealing portion; and an outer coating disposed between the stacked portion and the outer sealing portion.

[0011] According to embodiments of the present disclosure, a display device may be provided having a side-sealing portion as a structure for protecting the sides of stacked portions in a display panel from external impacts.

[0012] According to embodiments of the present disclosure, a display device may be provided that prevents cracking and / or delamination in the interlayer interface portion during temperature changes by providing a coating between a side sealing portion and a stacked portion in a display panel.

[0013] According to embodiments of the present disclosure, a display device can be provided that can more effectively prevent cracks and / or delamination in the interlayer interface portion of the display panel by providing a coating including a hydrophobic material.

[0014] According to embodiments of this disclosure, a coating can prevent cracking or delamination that may occur at interlayer interfaces in a display panel. By preventing cracking and delamination in the display panel during the manufacturing process, the yield of the display panel can be increased, thereby reducing waste of production energy and achieving process optimization. Attached Figure Description

[0015] The above and other objects, features and advantages of this disclosure will be more clearly understood from the following detailed embodiments, taken in conjunction with the accompanying drawings, in which:

[0016] Figure 1 This is a plan view illustrating a display device according to an embodiment of the present disclosure;

[0017] Figure 2 This illustrates an embodiment according to the present disclosure. Figure 1 Cross-sectional view of the first region;

[0018] Figure 3 This illustrates an embodiment according to the present disclosure. Figure 1 A cross-sectional view of the second region;

[0019] Figure 4 This illustrates an embodiment according to the present disclosure. Figure 1 Cross-sectional view of the first region;

[0020] Figure 5 This illustrates an embodiment according to the present disclosure. Figure 1 A cross-sectional view of the second region;

[0021] Figure 6 This illustrates an embodiment according to the present disclosure. Figure 1 Cross-sectional view of the first region;

[0022] Figure 7 This illustrates an embodiment according to the present disclosure. Figure 1 A cross-sectional view of the first region based on temperature changes;

[0023] Figure 8 This illustrates an embodiment according to the present disclosure. Figure 1 A cross-sectional view of the second region;

[0024] Figure 9 This illustrates an embodiment according to the present disclosure. Figure 1 A cross-sectional view of the second region based on temperature changes. Detailed Implementation

[0025] In the following description of examples or embodiments of this disclosure, reference will be made to the accompanying drawings, which illustrate specific examples or embodiments that can be implemented by way of illustration, and the same reference numerals and symbols may be used to denote the same or similar components even when the same or similar components are shown in different drawings. Furthermore, in the following description of examples or embodiments of this disclosure, descriptions of well-known functions and components incorporated herein will be omitted where it is determined that such detailed descriptions might make the subject matter of some embodiments of this disclosure considerably unclear. Terms such as “comprising,” “having,” “containing,” “constituting,” “composed of,” and “formed from” as used herein are generally intended to allow for the addition of additional components unless these terms are used in conjunction with the term “only.” As used herein, singular forms are intended to include plural forms unless the context clearly indicates otherwise.

[0026] This document may use terms such as “first,” “second,” “A,” “B,” “(A),” or “(B)” to describe elements of this disclosure. Each of these terms is not used to define the nature, order, sequence, or number of elements, but only to distinguish the corresponding element from other elements.

[0027] When referring to a first element as "connected or coupled to," "in contact with," or "overlapping" with a second element, it should be interpreted that the first element can not only be "directly connected or coupled to" or "directly contact with or overlap" the second element, but also that a third element can be "inserted" between the first and second elements, or that the first and second elements can be "connected or coupled," "in contact with," or "overlapping" with each other via a fourth element. Here, the second element can be included in at least one of two or more elements that are "connected or coupled," "in contact with," or "overlapping" with each other.

[0028] When using time-relative terms such as “after,” “following,” “next,” or “before” to describe a process or operation of an element or configuration, or a flow or step in an operation, processing, or manufacturing method, these terms may be used to describe a discontinuous or non-sequential process or operation, unless the terms “directly” or “immediately” are used together.

[0029] Furthermore, when referring to any size, relative size, etc., even without a specific description, it should be assumed that the numerical values ​​or corresponding information of the component or feature (e.g., level, range, etc.) include tolerances or error ranges that may be caused by various factors (e.g., process factors, internal or external influences, noise, etc.). In addition, the term "may" fully encompasses all the meanings of the term "able to".

[0030] Various embodiments of this disclosure are described in detail below with reference to the accompanying drawings.

[0031] Figure 1 This is a plan view illustrating a display device according to an embodiment of the present disclosure.

[0032] refer to Figure 1 The display device according to the embodiments of the present disclosure may include a display panel 10 for displaying images and a driving circuit for driving the display panel 10.

[0033] The display panel 10 according to embodiments of the present disclosure may include a display area DA for displaying images and a non-display area NDA disposed outside the display area DA.

[0034] The display area DA is the area where the image is displayed. It may include multiple sub-pixels and multiple signal lines for driving the sub-pixels. The non-display area NDA may include a curved area BA and may also include a pad area PA for connecting various driving circuits.

[0035] Multiple signal lines may include multiple data lines DL and multiple gate lines GL. The multiple data lines DL and multiple gate lines GL can be arranged intersecting each other. For example, the multiple gate lines GL can be arranged in rows or columns, and the multiple data lines DL can be arranged in columns or rows.

[0036] Each of the multiple subpixels may include at least one transistor and may be configured in various ways depending on the type of display device.

[0037] For example, the display device according to the embodiments of this disclosure may be a liquid crystal display device in which the display panel 10 itself does not emit light, or it may be a self-emissive display device in which the display panel 10 itself emits light. For example, a self-emissive display device may be an organic light-emitting display device that includes light-emitting elements based on organic materials in the display panel, an inorganic light-emitting display device that includes light-emitting elements based on inorganic materials in the display panel, or a quantum dot display device that includes light-emitting elements based on quantum dots in the display panel.

[0038] For example, when the display device according to an embodiment of the present disclosure is a self-emissive display device, each sub-pixel in the display panel 10 may include various types of light-emitting elements and at least one transistor for driving the light-emitting elements, and in some cases, may include at least one capacitor.

[0039] The pad region PA, included in the non-display area NDA, is disposed on one side of the substrate 220 and may include multiple pads (metal patterns) electrically connected to various driving circuits. For example, the driving circuits may include at least one of a driver chip, a flexible printed circuit (FPC), a printed circuit board (PCB), and a chip-on-film (COF). Although the pad region PA is shown disposed on one side of the substrate 220, the shape and arrangement of the pad region PA are not limited thereto.

[0040] Signals (e.g., voltages) input from an external module (drive circuit) connected to the pad area PA can be transmitted to signal lines in the display area DA via connection lines. For example, signals input through the pad area PA may include at least one of various gate drive-related signals, data signals, high-potential voltages, and low-potential voltages.

[0041] The non-display area NDA may include a curved area BA disposed on at least one side of the display panel 10 to bend or fold a portion of the substrate 220. For example, when the curved area BA bends in the rear direction of the display panel 10, external modules bonded to the pad area PA may not be visually identifiable. Furthermore, when the curved area BA bends, the size of the non-display area NDA visible from the top of the substrate 220 decreases, thereby achieving a narrow bezel.

[0042] refer to Figure 1The display panel 10 may include a first region 110 and a second region 120. The first region 110 includes a display region DA and a non-display region NDA adjacent to the display region DA. The second region 120 includes a curved region BA and at least a portion of the non-display region NDA adjacent to the curved region BA.

[0043] The structure of the display panel 10 briefly described above (particularly the vertical structure) is described in more detail below. In order to clearly describe the characteristics of the structure of the display panel 10, the structure of the first region 110 and the structure of the second region 120 are described.

[0044] Figure 2 The embodiments corresponding to the present disclosure Figure 1 A cross-sectional view of the display panel 10 in the first region 110.

[0045] refer to Figure 2 The first region 110 is a region disposed on at least one edge of the non-display region NDA, and may include the display region DA and the non-display region NDA adjacent to the display region DA but not curved.

[0046] refer to Figure 2 The display device according to the embodiments of the present disclosure may include a substrate 220, an intermediate layer 200, an upper adhesive layer 260, and a cover glass 270.

[0047] Intermediate layer 200 is disposed on substrate 220 and may include subintermediate layer 230 and lower adhesive layer 240 disposed on subintermediate layer 230.

[0048] The upper adhesive layer 260 can be disposed on the intermediate layer 200, and the cover glass 270 can be disposed on the upper adhesive layer 260.

[0049] The substrate 220 can support various components of the display device. For example, the substrate 220 can be a component in which various components, such as multiple metal layers and multiple insulating material layers, are formed.

[0050] The substrate 220 may be formed of a flexible material. For example, the substrate 220 may be formed of a flexible plastic material. For example, the flexible plastic material may include, but is not limited to, at least one of polyimide (PI), polymethyl methacrylate (PMMA), polyethylene terephthalate (PET), polyethersulfone, and polycarbonate (PC).

[0051] The sub-intermediate layer 230 is disposed on the substrate 220 and may include at least one insulating layer. Here, the insulating layer may include an inorganic layer or an organic layer. The sub-intermediate layer 230 may also include at least one metal layer.

[0052] For example, the sub-intermediate layer 230 may include a plurality of light-emitting element layers that emit light according to an image, a plurality of thin-film transistors for driving the plurality of light-emitting element layers, and a plurality of insulating layers and a plurality of metal layers for forming the plurality of thin-film transistors.

[0053] The lower adhesive layer 240 is disposed on the sub-intermediate layer 230 and may be formed of a transparent adhesive material. For example, the lower adhesive layer 240 may be formed of at least one of optically transparent adhesive (OCA), optically transparent resin (OCR), and pressure-sensitive adhesive (PSA), but is not limited thereto.

[0054] refer to Figure 2 The intermediate layer 200 may also include a polarizer 250 disposed on the lower adhesive layer 240. The polarizer 250 may be attached to the sub-intermediate layer 230 via the lower adhesive layer 240.

[0055] Polarizer 250 can selectively transmit light to reduce the reflection of external light incident on the display device. For example, the display device may include various metallic materials applied to thin-film transistors, light-emitting element layers, and lines. External light incident on the display device can be reflected by the metallic materials, and the screen visibility of the display device may be reduced due to this reflection. Therefore, polarizer 250 can be disposed inside or outside the display panel to prevent the reflection of external light and to enhance the screen visibility of the display device.

[0056] An upper adhesive layer 260 is disposed on the polarizer 250 and may be formed of a transparent adhesive material. For example, the upper adhesive layer 260 may be formed of at least one of optically transparent adhesive (OCA), optically transparent resin (OCR), and pressure-sensitive adhesive (PSA), but is not limited thereto.

[0057] Cover glass 270 is disposed on upper adhesive layer 260, and cover glass 270 can be attached to polarizer 250 via upper adhesive layer 260.

[0058] The cover glass 270 protects other components located beneath it from external impacts, heat, moisture, etc. The cover glass 270 can be formed of a material that is impact-resistant and transparent. For example, the cover glass 270 can be a glass substrate or a film formed of a plastic material such as polymethyl methacrylate (PMMA), polyimide (PI), or polyethylene terephthalate (PET), but is not limited thereto.

[0059] refer to Figure 2 The display device according to the embodiments of the present disclosure may further include a back plate 210 disposed below the substrate 220.

[0060] The back plate 210 is a support member used to keep the substrate 220 in a flat state. Because the substrate 220 can be formed of a flexible material, the back plate 210 can be used to maintain the shape or mechanical rigidity of the display device, etc.

[0061] Figure 3 The embodiments corresponding to the present disclosure Figure 1 A cross-sectional view of the display panel 10 in the second region 120.

[0062] refer to Figure 3 The second region 120 may include a curved region BA and at least a portion of a non-display region NDA adjacent to the curved region BA.

[0063] When the second region 120 and Figure 2 When the first area 110 is set on the display panel 10, some components can be connected, so repeated descriptions of some components are omitted.

[0064] refer to Figure 3 The display device according to the embodiments of the present disclosure may include a substrate 220, a sub-intermediate layer 230 and a reinforcing member 310.

[0065] The substrate 220 may include a display area DA and a non-display area NDA having a curved area BA. That is, the substrate 220 may be configured to extend from the display area DA to the non-display area NDA having the curved area BA.

[0066] The sub-intermediate layer 230 can be disposed on the substrate 220 and can extend from the display area DA to the non-display area NDA with the curved area BA. That is, the sub-intermediate layer 230 can be disposed on the outer side of the substrate 220.

[0067] The reinforcing member 310 can be disposed in the non-display area NDA having the curved region BA. That is, the reinforcing member 310 can be disposed on the outside of the sub-intermediate layer 230.

[0068] The reinforcing member 310 may be formed of a material such as a resin. For example, the reinforcing member 310 may include at least one of a UV-curable acrylic resin or a thermosetting resin, but is not limited thereto.

[0069] The reinforcing member 310 may be a micro-covering layer (MCL), but is not limited to that term.

[0070] Since the reinforcing member 310 can cover the various connection lines disposed between the encapsulation portion and the pad area PA of the display panel 10, it can prevent moisture from penetrating into the connection lines and protect the connection lines from external impacts.

[0071] In the curved region BA, to improve the flexibility of the display panel 10, components other than the substrate 220 and connecting lines can be partially removed, thereby reducing rigidity. The reinforcing member 310 can supplement the rigidity of the curved region BA in which other components have been partially removed.

[0072] refer to Figure 3 The display device according to the embodiments of the present disclosure may include a first back plate 211 extending from the display area DA and disposed below the substrate 220.

[0073] The first backplate 211 can be set from the... Figure 2 The backplate 210 extends below the substrate 220.

[0074] refer to Figure 3 The display device according to embodiments of the present disclosure may include a second back plate 212, which is perpendicularly spaced from the first back plate 211 and is configured to overlap at least a portion of the first back plate 211.

[0075] Before the curved area BA of the curved display panel 10, the second back panel 212 can be disposed on the same layer as the first back panel 211.

[0076] refer to Figure 3 The display device according to the embodiments of the present disclosure may further include a connecting member 300, which is disposed between the first back plate 211 and the second back plate 212 and connects the first back plate 211 and the second back plate 212.

[0077] The connecting member 300 may further include a first sub-adhesive layer 341, a first metal plate 351, a second sub-adhesive layer 342, a second metal plate 352, and a sub-connecting member 360.

[0078] The first sub-adhesive layer 341 is disposed on the lower surface of the first backplate 211 and may be formed of a material having transparent and adhesive properties. For example, the first sub-adhesive layer 341 may be formed of at least one of optically transparent adhesive (OCA), optically transparent resin (OCR), and pressure-sensitive adhesive (PSA), but is not limited thereto.

[0079] The first metal plate 351 may be disposed on the lower surface of the first sub-adhesive layer 341, and the first metal plate 351 may be attached to the first back plate 211 via the first sub-adhesive layer 341.

[0080] The second sub-adhesive layer 342 is disposed on the upper surface of the second back plate 212 and may be formed of a material having transparent and adhesive properties. For example, the second sub-adhesive layer 342 may be formed of at least one of optically transparent adhesive (OCA), optically transparent resin (OCR), and pressure-sensitive adhesive (PSA), but is not limited thereto.

[0081] The second metal plate 352 may be disposed on the upper surface of the second sub-adhesive layer 342, and the second metal plate 352 may be attached to the second back plate 212 via the second sub-adhesive layer 342.

[0082] The first metal plate 351 and the second metal plate 352 may be formed of a material with rigidity and high thermal conductivity to support and protect the display panel 10 on the rear surface of the substrate 220. In addition, the first metal plate 351 and the second metal plate 352 may be formed of opaque metal to prevent light leakage to the rear of the display panel 10.

[0083] For example, the first metal plate 351 and the second metal plate 352 may be formed of at least one of aluminum (Al), copper (Cu), zinc (Zn), silver (Ag), gold (Au), iron (Fe), stainless steel (SUS), Invar alloy, etc., but are not limited thereto.

[0084] The sub-connecting member 360 can be disposed between the first metal plate 351 and the second metal plate 352.

[0085] When the display panel 10 corresponding to the bending region BA is bent such that the pad region PA of the display panel 10 is placed on the rear surface of the display panel 10, a restoring force for returning to the state before bending can be applied to the display panel 10.

[0086] The sub-connecting member 360 can be used as a fixing member to fix the curved display panel 10 to maintain its curved shape.

[0087] The sub-connecting member 360 may be a double-sided adhesive tape with adhesive properties that can fix the first metal plate 351 and the second metal plate 352.

[0088] Furthermore, the sub-connecting member 360 can be a buffer layer. Therefore, when the sub-connecting member 360 is provided, external impacts applied to the display panel 10 can be mitigated.

[0089] refer to Figure 3 The sub-connecting member 360 may also include a base layer 362 and a first sub-connecting layer 361 and a second sub-connecting layer 363 respectively formed on two opposite surfaces of the base layer 362.

[0090] The sub-connecting member 360 can be fixed to the first metal plate 351 through the first sub-connecting layer 361, and can be fixed to the second metal plate 352 through the second sub-connecting layer 363.

[0091] The base layer 362 can be a support layer used to maintain the shape of the sub-connecting member 360.

[0092] Figure 4 The embodiments corresponding to the present disclosure Figure 1 A cross-sectional view of the display panel 10 in the first region 110.

[0093] refer to Figure 4 The display device according to the embodiments of the present disclosure may include a side sealing portion 280 disposed on the outside of the stacked portion 20, the stacked portion 20 including a substrate 220, an intermediate layer 200 and an upper adhesive layer 260.

[0094] The side sealing portion 280 can be disposed on the outside of the stacked portion 20 to protect the display panel 10. For example, the side sealing portion 280 can protect the display panel 10 from external impacts applied to the side surface of the stacked portion 20. In addition, the side sealing portion 280 can prevent moisture and oxygen from flowing into the side surface of the stacked portion 20.

[0095] refer to Figure 4 The cover glass 270 can extend outward from the portion overlapping with the upper adhesive layer 260, and the lower surface of the cover glass 270 can contact the upper surface of the side sealing portion 280.

[0096] Figure 5 The embodiments corresponding to the present disclosure Figure 1 A cross-sectional view of the display panel 10 in the second region 120.

[0097] refer to Figure 5 In the non-display area NDA and the curved area BA, the inner sealing portion 381 can be provided inside the curved portion of the substrate 220. That is, the inner sealing portion 381 can be configured to fill the internal gaps generated when the display panel 10 is bent and the first back plate 211 and the second back plate 212 are connected by the connecting member 300.

[0098] refer to Figure 5 The outer sealing portion 382 can be disposed on the outside of the reinforcing member 310 in the bending region BA.

[0099] The display panel 10 can be protected by providing an inner sealing portion 381 and an outer sealing portion 382 on two opposite sides of the curved portion of the substrate 220 and the sub-intermediate layer 230. For example, the inner sealing portion 381 and the outer sealing portion 382 can protect the substrate 220 and the sub-intermediate layer 230 from external impacts applied to the curved region BA. In addition, the inner sealing portion 381 and the outer sealing portion 382 can prevent moisture and oxygen from entering from the outside of the display panel 10.

[0100] Figure 6 The embodiments corresponding to the present disclosure Figure 1 A cross-sectional view of the display panel 10 in the first region 110.

[0101] refer to Figure 6 The display device according to the embodiments of the present disclosure may include a coating 290 disposed between a stacked portion 20 and a side sealing portion 280, the stacked portion 20 including a substrate 220, an intermediate layer 200 and an upper adhesive layer 260.

[0102] Since the coating 290 is disposed between the stacked portion 20 and the side sealing portion 280, the mutual influence between the deformation of the stacked portion 20 and the deformation of the side sealing portion 280 according to temperature changes can be reduced.

[0103] For example, even if the ambient temperature of the display device becomes higher or lower than room temperature, the coating 290 can prevent the deformation of the side sealing portion 280 from affecting the stacked portion 20, or prevent the deformation of the stacked portion 20 from affecting the side sealing portion 280.

[0104] For example, coating 290 may be configured to surround at least one edge of the non-display area NDA.

[0105] For example, in a display device according to an embodiment of the present disclosure, coating 290 may include a hydrophobic material.

[0106] For example, a hydrophobic material can be a polymeric material with a low surface energy equal to or less than a predetermined value. For example, the surface energy of a hydrophobic material can be about 30 mN / m or less.

[0107] For example, hydrophobic materials with low surface energy may include at least one of fluorine-based hydrophobic materials, silicon-based hydrophobic materials, and saturated alkyl-based hydrophobic materials.

[0108] For example, fluorinated hydrophobic materials may include at least one of perfluoropolyether (PFPE) and fluoroolefin-based fluorinated elastomers. Silicon-based hydrophobic materials may include poly(dimethylsiloxane) (PDMS). Saturated alkyl-based hydrophobic materials may include at least one of poly(tetramethylene oxide), poly(ethylene oxide), poly(oxetine), polyisoprene, and polybutadiene.

[0109] Coating 290 can reduce the temperature-dependent variation deviation between the sub-intermediate layer 230 and the lower adhesive layer 240.

[0110] The following describes in more detail how coating 290 reduces the variation deviation between sub-intermediate layer 230 and lower adhesive layer 240 at temperatures below room temperature.

[0111] The rate of change of the side sealing portion 280 according to the embodiments of the present disclosure with respect to temperature change can be greater than the rate of change of the stack portion 20 including the substrate 220, the intermediate layer 200 and the upper adhesive layer 260 with respect to temperature change.

[0112] According to embodiments of this disclosure, the “rate of change” of any component (e.g., side sealing portion 280, substrate 220, intermediate layer 200, upper adhesive layer 260, etc.) can be a rate of change in size or a rate of change in volume.

[0113] Alternatively, "rate of change" can include shrinkage rate (shrinkage rate) and expansion rate (expansion rate). Shrinkage rate can be defined as the ratio (ΔS / S) of the dimensional change of a corresponding part due to temperature change, which is the amount of shrinkage and reduction, to the size S of the corresponding part at room temperature. Expansion rate can be defined as the ratio (ΔS / S) of the dimensional change of a corresponding part due to temperature change, which is the amount of expansion and increase, to the size S of the corresponding part at room temperature.

[0114] For example, at low temperatures below room temperature, the side sealing portion 280 can shrink more than the stacked portion 20. That is, at low temperatures below room temperature, the rate of shrinkage of the side sealing portion 280 can be greater than the rate of shrinkage of the stacked portion 20. At temperatures above room temperature, the side sealing portion 280 can expand more than the stacked portion 20. That is, at temperatures above room temperature, the rate of expansion of the side sealing portion 280 can be greater than the rate of expansion of the stacked portion 20.

[0115] The side seal portion 280 may include a material having this rate of change characteristic. For example, the side seal portion 280 may include a polymer material with a relatively large rate of change with temperature compared to the materials of other components (e.g., stack portion 20, etc.).

[0116] Due to the behavior of the side seal portion 280 according to temperature changes, cracks may occur at the interface between the sub-intermediate layer 230 and the lower adhesive layer 240 when assessing the thermal shock of the display panel 10 during the manufacturing process of the display panel 10. The display panel 10 may then be defective.

[0117] When evaluating the thermal shock of the display panel 10, the occurrence of cracks in the upper part of the sub-intermediate layer 230 is described as follows.

[0118] The sub-intermediate layer 230 and the lower adhesive layer 240 may comprise materials with different rates of change according to temperature. That is, the materials of the sub-intermediate layer 230 and the lower adhesive layer 240 may have different rates of change according to temperature.

[0119] The sub-intermediate layer 230 has the property of shrinking at temperatures below room temperature. At temperatures below room temperature, the shrinkage direction of the sub-intermediate layer 230 and the shrinkage direction of the side sealing portion 280 can be opposite to each other. That is, at temperatures below room temperature, the sub-intermediate layer 230 can shrink in a direction opposite to the shrinkage direction of the side sealing portion 280.

[0120] The lower adhesive layer 240 may be formed of a transparent adhesive material. The lower adhesive layer 240 may have strong adhesion to the side sealing portion 280. In the components of the stacked portion 20, the lower adhesive layer 240 may have even stronger adhesion to the side sealing portion 280.

[0121] When the side seal portion 280 shrinks at a temperature below room temperature, the lower adhesive layer 240 can adhere to the shrinking side seal portion 280 and expand while being stretched.

[0122] At temperatures below room temperature, the direction of contraction of the sub-intermediate layer 230 and the direction of expansion of the lower adhesive layer 240 can be opposite to each other. Therefore, at the interface between the sub-intermediate layer 230 and the lower adhesive layer 240, stress can be applied to each of the sub-intermediate layer 230 and the lower adhesive layer 240. Consequently, cracks may occur in the upper part of the sub-intermediate layer 230.

[0123] According to embodiments of this disclosure, coating 290 is disposed between the lower adhesive layer 240 and the side sealing portion 280, such that the lower adhesive layer 240 and the side sealing portion 280 can be separated from each other. Therefore, at temperatures below room temperature, due to coating 290, the lower adhesive layer 240 can not expand in the direction opposite to the direction of contraction of the sub-intermediate layer 230, thereby reducing the variation deviation between the sub-intermediate layer 230 and the lower adhesive layer 240 caused by temperature changes.

[0124] As a result, the stress applied to the interface between the sub-intermediate layer 230 and the lower adhesive layer 240 is also reduced, and cracks can be prevented from appearing in the upper part of the sub-intermediate layer 230.

[0125] Furthermore, since the adhesive force between the coating 290 and the side sealing portion 280 is much smaller than the adhesive force between the coating 290 and the stacked portion 20, the coating 290 is unaffected by the side sealing portion 280 even if it shrinks at temperatures below room temperature. That is, at temperatures below room temperature, the coating 290 can be spaced apart from the side sealing portion 280 and can move integrally with the stacked portion 20.

[0126] In the following Figure 7 The temperature-specific behavior of the stacked portion 20, the coating 290, and the side sealing portion 280 is described.

[0127] refer to Figure 6 The cover glass 270 can extend outward from the portion overlapping with the upper adhesive layer 260, and the lower surface of the cover glass 270 can contact the upper surface of the coating 290 and the upper surface of the side sealing portion 280.

[0128] Figure 7 This illustrates an embodiment according to the present disclosure. Figure 1 A cross-sectional view of the first region 110 based on temperature changes.

[0129] According to an embodiment of this disclosure, the first temperature T1 may represent room temperature.

[0130] refer to Figure 7 When the ambient temperature of the display device is a first temperature T1, the stacked portion 20 including the substrate 220, the intermediate layer 200, the upper adhesive layer 260, and the side sealing portion 280 may not shrink or expand.

[0131] According to embodiments of this disclosure, the second temperature T2 can be a temperature below room temperature.

[0132] refer to Figure 7 When the ambient temperature of the display device is the second temperature T2, the coating 290 can be spaced apart from the side sealing portion 280.

[0133] refer to Figure 7 When the ambient temperature of the display device is a second temperature T2, the substrate 220 and the sub-intermediate layer 230 can shrink in a first direction, and the first side sealing portion 280 can shrink in a second direction different from the first direction.

[0134] According to embodiments of this disclosure, the third temperature T3 can indicate a temperature exceeding room temperature.

[0135] refer to Figure 7When the ambient temperature of the display device is a third temperature T3, the upper adhesive layer 260, the lower adhesive layer 240 and the polarizer 250 can shrink in the first direction, and the side sealing portion 280 that overlaps with the upper adhesive layer 260, the lower adhesive layer 240 and the polarizer 250 can expand in the first direction.

[0136] refer to Figure 7 The rate of change of polarizer 250 with respect to temperature may be different from at least one of the rate of change of sub-intermediate layer 230 with respect to temperature and the rate of change of change of lower adhesive layer 240 with respect to temperature.

[0137] refer to Figure 7 The dimensional change of the backing plate 210 due to temperature changes can be less than the dimensional change of the sub-intermediate layer 230 and the dimensional change of the lower adhesive layer 240 due to temperature changes.

[0138] Figure 8 The embodiments corresponding to the present disclosure Figure 1 A cross-sectional view of the display panel 10 in the second region 120.

[0139] refer to Figure 8 The inner coating 391 can be disposed between the substrate 220 and the inner sealing portion 381, and one end and the other end of the inner coating 391 can contact the first back plate 211 and the second back plate 212 respectively.

[0140] refer to Figure 8 The outer coating 392 can be disposed between the reinforcing member 310 and the outer sealing portion 382.

[0141] When the inner coating 391 and the outer coating 392 are provided, even if the ambient temperature of the display device becomes higher or lower than room temperature, the deformation of the inner sealing portion 381 and the outer sealing portion 382 can be prevented from affecting the sub-intermediate layer 230.

[0142] For example, in a display device according to an embodiment of the present disclosure, the inner coating 391 and the outer coating 392 may include hydrophobic materials.

[0143] For example, a hydrophobic material can be a polymeric material with a low surface energy equal to or less than a predetermined value. For example, the surface energy of a hydrophobic material can be about 30 mN / m or less.

[0144] For example, hydrophobic materials with low surface energy may include at least one of fluorine-based hydrophobic materials, silicon-based hydrophobic materials, and saturated alkyl-based hydrophobic materials.

[0145] For example, fluorinated hydrophobic materials may include at least one of perfluoropolyether (PFPE) and fluoroolefin-based fluorinated elastomers. Silicon-based hydrophobic materials may include poly(dimethylsiloxane) (PDMS). Saturated alkyl-based hydrophobic materials may include at least one of poly(tetramethylene oxide), poly(ethylene oxide), poly(oxetine), polyisoprene, and polybutadiene.

[0146] When the temperature changes, the inner coating 391 and the outer coating 392 can maintain a balance between compressive stress and tensile stress applied to one side and the other side of the sub-intermediate layer 230.

[0147] The following describes in more detail the situation in which the inner coating 391 and the outer coating 392 maintain a balance between compressive and tensile stresses applied to one side and the other side of the sub-intermediate layer 230 at temperatures below room temperature.

[0148] According to embodiments of the present disclosure, the rate of change of the inner sealing portion 381 and the outer sealing portion 382 with respect to temperature can be greater than the rate of change of the substrate 220, the sub-intermediate layer 230 and the reinforcing member 310 with respect to temperature.

[0149] According to embodiments of this disclosure, the “rate of change” of any component (e.g., inner sealing portion 381, outer sealing portion 382, ​​substrate 220, sub-intermediate layer 230, reinforcing member 310, etc.) can be a rate of change in size or a rate of change in volume.

[0150] Alternatively, "rate of change" can include shrinkage rate (shrinkage rate) and expansion rate (expansion rate). Shrinkage rate can be defined as the ratio (ΔS / S) of the dimensional change of a corresponding part due to temperature change, which is the amount of shrinkage and reduction, to the size S of the corresponding part at room temperature. Expansion rate can be defined as the ratio (ΔS / S) of the dimensional change of a corresponding part due to temperature change, which is the amount of expansion and increase, to the size S of the corresponding part at room temperature.

[0151] For example, at low temperatures below room temperature, the inner sealing portion 381 and the outer sealing portion 382 can shrink more than the substrate 220, the sub-intermediate layer 230, and the reinforcing member 310. That is, at low temperatures below room temperature, the rate of shrinkage of the inner sealing portion 381 and the outer sealing portion 382 can be greater than the rate of shrinkage of the substrate 220, the sub-intermediate layer 230, and the reinforcing member 310. At temperatures above room temperature, the inner sealing portion 381 and the outer sealing portion 382 can expand more than the substrate 220, the sub-intermediate layer 230, and the reinforcing member 310. That is, at temperatures above room temperature, the rate of expansion of the inner sealing portion 381 and the outer sealing portion 382 can be greater than the rate of expansion of the substrate 220, the sub-intermediate layer 230, and the reinforcing member 310.

[0152] The inner sealing portion 381 and the outer sealing portion 382 may include materials with such a rate of change characteristic. For example, compared with the materials of other components (e.g., substrate 220, sub-intermediate layer 230, reinforcing member 310, etc.), the inner sealing portion 381 and the outer sealing portion 382 may include polymer materials with a relatively large rate of change according to temperature.

[0153] Due to the behavior of the inner sealing portion 381 and the outer sealing portion 382 according to temperature changes, delamination may occur between the multiple layers in the curved portion of the sub-intermediate layer 230 when the thermal shock of the display panel 10 is evaluated during the manufacturing process of the display panel 10. The display panel 10 may then be defective.

[0154] When evaluating the thermal shock of the display panel 10, the delamination that occurs between multiple layers in the curved portion of the sub-intermediate layer 230 is described below.

[0155] The substrate 220, the sub-intermediate layer 230, and the reinforcing member 310 can be bent and fixed with a constant curvature in the bending region BA.

[0156] In this case, compressive stress can be applied to a surface located near the curvature center of each of the substrate 220, the sub-intermediate layer 230, and the reinforcing member 310, and tensile stress can be applied to a surface opposite to the surface to which the compressive stress is applied.

[0157] When the substrate 220, sub-intermediate layer 230 and reinforcing member 310 are bent, the compressive stress on one side of each of the substrate 220, sub-intermediate layer 230 and reinforcing member 310 and the tensile stress on the other side can be balanced to maintain the bent shape.

[0158] There may be adhesive force between the inner sealing portion 381 and the substrate 220, and there may be adhesive force between the outer sealing portion 382 and the reinforcing member 310.

[0159] When the inner sealing portion 381 shrinks at a temperature below room temperature, the substrate 220 can be pulled in the direction of the shrinkage of the inner sealing portion 381 due to the adhesive force of the shrinking inner sealing portion 381.

[0160] When the outer sealing portion 382 shrinks at a temperature below room temperature, the reinforcing member 310 can be pulled in the direction of the shrinkage of the outer sealing portion 382 due to the adhesive force of the shrinking outer sealing portion 382.

[0161] At temperatures below room temperature, the directions of pulling the substrate 220 and pulling the reinforcing member 310 around the sub-intermediate layer 230 can be opposite to each other. As a result, the balance between compressive and tensile stresses acting on one side and the other side of the sub-intermediate layer 230, respectively, may be disrupted.

[0162] If the balance between compressive and tensile stresses acting on one side and the other side of the sub-intermediate layer 230 breaks down, the layer disposed on the neutral surface of the sub-intermediate layer 230, which may include multiple layers, may crack.

[0163] A neutral surface can be defined as a surface where the stress state becomes zero during bending. That is, if the balance between compressive and tensile stresses acting on one side and the other side of the sub-intermediate layer 230, respectively, breaks down, the stress state on the neutral surface of the sub-intermediate layer 230 may not be zero.

[0164] Cracks appearing in sub-intermediate layer 230 may lead to delamination between multiple layers in sub-intermediate layer 230.

[0165] According to embodiments of this disclosure, since the inner coating 391 is disposed between the substrate 220 and the inner sealing portion 381, the substrate 220 and the inner sealing portion 381 can be separated from each other. Therefore, at temperatures below room temperature, the substrate 220 will not be pulled in the direction of contraction of the inner sealing portion 381 due to the inner coating 391.

[0166] According to embodiments of this disclosure, since the outer coating 392 is disposed between the reinforcing member 310 and the outer sealing portion 382, ​​the reinforcing member 310 and the outer sealing portion 382 can be separated from each other. Therefore, at temperatures below room temperature, the reinforcing member 310 will not be pulled in the direction of contraction of the outer sealing portion 382 due to the outer coating 392.

[0167] As a result, the force that pulls on the substrate 220 and the reinforcing member 310 when the inner sealing portion 381 and the outer sealing portion 382 contract on two opposite sides of the sub-intermediate layer 230 is eliminated, so that the balance between compressive stress and tensile stress acting on one side and the other side of the sub-intermediate layer 230 can be maintained.

[0168] Therefore, it is possible to prevent cracks from appearing in the layers on the neutral surface of the curved sub-intermediate layer 230, and to prevent delamination of multiple layers in the sub-intermediate layer 230.

[0169] Furthermore, since the adhesive force between the inner coating 391 and the inner sealing portion 381 is much smaller than the adhesive force between the inner coating 391 and the substrate 220, the inner coating 391 will not be affected even if the inner sealing portion 381 shrinks at temperatures below room temperature. That is, at temperatures below room temperature, the inner coating 391 can be separated from the inner sealing portion 381.

[0170] Since the adhesive force between the outer coating 392 and the outer sealing portion 382 is much smaller than the adhesive force between the outer coating 392 and the reinforcing member 310, the outer coating 392 will not be affected even if the outer sealing portion 382 shrinks at temperatures below room temperature. That is, at temperatures below room temperature, the outer coating 392 can be separated from the outer sealing portion 382.

[0171] Figure 9 The temperature-specific behavior of the inner coating 391, outer coating 392, inner sealing portion 381, and outer sealing portion 382 is described.

[0172] Figure 9 This illustrates an embodiment according to the present disclosure. Figure 1 A cross-sectional view of the second region 120 based on temperature changes.

[0173] The first temperature T1, the second temperature T2, and the third temperature T3 are... Figure 7 Those are the same, so their repeated descriptions can be omitted.

[0174] refer to Figure 9 When the ambient temperature of the display device is the first temperature T1, the inner sealing part 381 and the outer sealing part 382 may not shrink or expand.

[0175] refer to Figure 9 When the ambient temperature of the display device is the second temperature T2, the inner sealing portion 381 can shrink in the first direction or be spaced apart from the inner coating 391, and the outer sealing portion 382 can shrink in the second direction or be spaced apart from the outer coating 392.

[0176] refer to Figure 9 When the ambient temperature of the display device is a third temperature T3, the inner sealing portion 381 can expand in the second direction, and the outer sealing portion 382 can expand in the first direction.

[0177] The inner coating 391, substrate 220, sub-intermediate layer 230, reinforcing member 310, and outer coating 392 disposed between the inner sealing portion 381 and the outer sealing portion 382 can have sufficient strength to withstand the pressure applied when the inner sealing portion 381 and the outer sealing portion 382 expand in the second direction and the first direction, respectively. Therefore, each of the inner sealing portion 381 and the outer sealing portion 382 can remain unchanged at temperatures above room temperature (i.e., according to temperature rise).

[0178] The foregoing embodiments of this disclosure are briefly described below.

[0179] The display device according to embodiments of the present disclosure may include: a substrate; an intermediate layer disposed on the substrate and including a sub-intermediate layer and a lower adhesive layer disposed on the sub-intermediate layer; an upper adhesive layer disposed on the intermediate layer; a cover glass disposed on the upper adhesive layer; a side sealing portion disposed on the outside of a stacked portion including the substrate, the intermediate layer and the upper adhesive layer; and a coating disposed between the stacked portion and the side sealing portion and comprising a hydrophobic material.

[0180] According to embodiments of the present disclosure, the sub-intermediate layer and the lower adhesive layer may comprise materials with different rates of change depending on temperature.

[0181] The display device according to embodiments of the present disclosure can reduce the deviation of dimensional changes between the sub-intermediate layer and the lower adhesive layer due to temperature variations through the coating.

[0182] According to an embodiment of the display device of the present disclosure, the intermediate layer may further include a polarizer disposed on the lower adhesive layer, and the rate of change of the polarizer with respect to temperature may be different from at least one of the rate of change of the sub-intermediate layer with respect to temperature and the rate of change of the lower adhesive layer with respect to temperature.

[0183] According to an embodiment of the present disclosure, when the ambient temperature of the display device exceeds room temperature, the upper adhesive layer, the lower adhesive layer, and the polarizer can shrink in a first direction, and the side sealing portion overlapping the upper adhesive layer, the lower adhesive layer, and the polarizer can expand in the first direction.

[0184] The display device according to embodiments of this disclosure may further include a back plate disposed beneath the substrate. The dimensional change of the back plate with respect to temperature may be less than the dimensional change of the sub-intermediate layer with respect to temperature and the dimensional change of the lower adhesive layer with respect to temperature.

[0185] According to an embodiment of the present disclosure, the cover glass can extend outward from the portion overlapping the upper adhesive layer, and the lower surface of the cover glass can contact the upper surface of the coating and the upper surface of the side sealing portion.

[0186] According to embodiments of the present disclosure, the coating may be configured to surround at least a portion of at least one edge of a non-display area.

[0187] The display device according to embodiments of the present disclosure may include at least one of fluorinated hydrophobic materials, silicon-based hydrophobic materials, and saturated alkyl-based hydrophobic materials.

[0188] According to an embodiment of the present disclosure, when the ambient temperature of the display device is lower than room temperature, the coating can be spaced apart from the side sealing portion, the substrate and the sub-intermediate layer can shrink in a first direction, and the first side sealing portion can shrink in a second direction different from the first direction.

[0189] A display device according to an embodiment of the present disclosure may include: a substrate including a display area and a non-display area, the non-display area including a curved area; an inner sealing portion disposed inside the curved portion of the substrate in the curved area; a sub-intermediate layer disposed on the substrate, extending from the display area and disposed outside the curved portion of the substrate; a reinforcing member disposed outside the sub-intermediate layer; an outer sealing portion disposed outside the reinforcing member in the curved area; an inner coating layer disposed between the substrate and the inner sealing portion; and an outer coating layer disposed between the reinforcing member and the outer sealing portion.

[0190] According to embodiments of the present disclosure, the inner coating and the outer coating of the display device may include hydrophobic materials.

[0191] The display device according to embodiments of the present disclosure may include at least one of fluorinated hydrophobic materials, silicon-based hydrophobic materials, and saturated alkyl-based hydrophobic materials.

[0192] The display device according to embodiments of the present disclosure may further include a first back plate extending from the display area and disposed below the substrate, and a second back plate perpendicularly spaced from the first back plate and overlapping at least a portion of the first back plate.

[0193] The display device according to embodiments of the present disclosure may further include a connecting member disposed between the first back plate and the second back plate and connecting the first back plate and the second back plate.

[0194] According to an embodiment of the present disclosure, the connecting member may include a first sub-adhesive layer disposed on the lower surface of the first back plate, a first metal plate disposed on the lower surface of the first sub-adhesive layer, a second sub-adhesive layer disposed on the upper surface of the second back plate, a second metal plate disposed on the upper surface of the second sub-adhesive layer, and a sub-connecting member disposed between the first metal plate and the second metal plate.

[0195] According to an embodiment of the present disclosure, in a display device, one end and the other end of the inner coating can respectively contact the first back plate and the second back plate.

[0196] According to an embodiment of the present disclosure, when the ambient temperature of the display device is lower than room temperature, the inner sealing portion may shrink or may be spaced apart from the inner coating, and the outer sealing portion may shrink or may be spaced apart from the outer coating.

[0197] According to embodiments of the present disclosure, when the ambient temperature of the display device exceeds room temperature, each of the inner sealing portion and the outer sealing portion may not change with the increase in temperature.

[0198] The display device according to embodiments of the present disclosure may further include a coating configured to surround at least one edge of the non-display area.

[0199] According to the embodiments of the present disclosure described above, a display device can be provided having a side sealing portion as a structure for protecting the sides of the stacked portions in the display panel from external impacts.

[0200] According to embodiments of the present disclosure, a display device may be provided that prevents cracking and / or delamination in the interlayer interface portion during temperature changes by providing a coating between a stacked portion and a side sealing portion in a display panel.

[0201] According to embodiments of the present disclosure, a display device can be provided that can more effectively prevent cracks and / or delamination in the display panel by providing a coating including a hydrophobic material.

[0202] The foregoing description has been presented to enable any person skilled in the art to make and use the technical concepts of this disclosure, and has been provided in the context of a particular application and its requirements. Various modifications, additions, and substitutions to the described embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of this disclosure. The foregoing description and accompanying drawings are provided for illustrative purposes only, as examples of the technical concepts of this disclosure. That is, the disclosed embodiments are intended to illustrate the scope of the technical concepts of this disclosure.

Claims

1. A display device, comprising: Stacked sections; A cover glass, the cover glass being disposed on the stacked portion; A side sealing portion, wherein the side sealing portion is disposed on the side surface of the stacked portion; and A coating, wherein the coating is disposed between the stacked portion and the side sealing portion and comprises a hydrophobic material, The stacked portion includes: substrate; and An intermediate layer is disposed on the substrate and includes a sub-intermediate layer and a lower adhesive layer disposed on the sub-intermediate layer.

2. The display device according to claim 1, wherein, The sub-intermediate layer and the lower adhesive layer comprise materials with different rates of change depending on temperature.

3. The display device according to claim 2, wherein, The coating reduces the deviation in dimensional change between the sub-intermediate layer and the lower adhesive layer due to temperature variations.

4. The display device according to claim 2, wherein, The intermediate layer also includes a polarizer disposed on the lower adhesive layer. The stacked portion further includes an upper adhesive layer disposed on the intermediate layer. The rate of change of the polarizer with respect to temperature is different from at least one of the rate of change of the sub-intermediate layer with respect to temperature and the rate of change of the lower adhesive layer with respect to temperature.

5. The display device according to claim 4, wherein, When the ambient temperature of the display device exceeds room temperature, the upper adhesive layer, the lower adhesive layer, and the polarizer contract in a first direction, and the side sealing portion that overlaps with the upper adhesive layer, the lower adhesive layer, and the polarizer expands in the first direction.

6. The display device according to claim 2 further includes a back plate disposed below the substrate. in, The dimensional change of the backplate due to temperature is less than the dimensional change of the sub-intermediate layer and the dimensional change of the lower adhesive layer due to temperature.

7. The display device according to claim 1, wherein, The cover glass extends outward from the portion that overlaps with the stacked portion. The lower surface of the cover glass contacts the upper surface of the coating and the upper surface of the side sealing portion.

8. The display device according to claim 1, wherein, The coating is configured to surround at least one edge of the substrate.

9. The display device according to claim 1, wherein, The hydrophobic material includes at least one of fluorine-based hydrophobic materials, silicon-based hydrophobic materials, and saturated alkyl-based hydrophobic materials.

10. The display device according to claim 1, wherein, When the ambient temperature of the display device is lower than room temperature, the coating is spaced apart from the side sealing portion, the substrate and the sub-intermediate layer shrink in a first direction, and the first side sealing portion shrinks in a second direction different from the first direction.

11. The display device according to claim 1, wherein, The rate of change of the side sealing portion with respect to temperature is greater than the rate of change of the stacked portion with respect to temperature.

12. The display device according to claim 1, wherein, The adhesion between the coating and the side sealing portion is less than the adhesion between the coating and the stacked portion.

13. A display device, comprising: The stacked portion has a curved region; An inner sealing portion is disposed on the inside of the stacked portion in the curved region; An outer sealing portion, wherein the outer sealing portion is disposed on the outside of the stacked portion in the curved region; An inner coating is disposed between the stacked portion and the inner sealing portion; and An outer coating is disposed between the stacked portion and the outer sealing portion.

14. The display device according to claim 13, wherein, The stacked portion includes: substrate; Sub-intermediate layer, the sub-intermediate layer being disposed on the substrate; and A reinforcing member is disposed on the sub-intermediate layer.

15. The display device according to claim 13, wherein, The inner coating and the outer coating comprise hydrophobic materials.

16. The display device according to claim 15, wherein, The hydrophobic material includes at least one of fluorine-based hydrophobic materials, silicon-based hydrophobic materials, and saturated alkyl-based hydrophobic materials.

17. The display device according to claim 14, further comprising: A first back plate is disposed in a non-bending region extending from one side of the bending region of the stacked portion and disposed below the substrate; and A second backplate is disposed in a non-curved region extending from the curved region of the stacked portion and overlapping at least a portion of the first backplate.

18. The display device according to claim 17, further comprising: A connecting member is disposed between the first back plate and the second back plate and connects the first back plate and the second back plate.

19. The display device according to claim 18, wherein, The connecting component includes: A first sub-adhesive layer is disposed on the lower surface of the first back plate; A first metal plate is disposed on the lower surface of the first sub-adhesive layer; The second sub-adhesive layer is disposed on the upper surface of the second back plate; A second metal plate, the second metal plate being disposed on the upper surface of the second sub-adhesive layer; and A sub-connecting member is disposed between the first metal plate and the second metal plate.

20. The display device according to claim 17, wherein, One end of the inner coating contacts the first back plate and the second back plate, respectively.

21. The display device according to claim 13, wherein, When the ambient temperature of the display device is lower than room temperature, the inner sealing portion shrinks or separates from the inner coating, and the outer sealing portion shrinks or separates from the outer coating.

22. The display device according to claim 13, wherein, When the ambient temperature of the display device exceeds room temperature, the dimensions of each of the inner sealing portion and the outer sealing portion do not change with the increase in temperature.

23. The display device according to claim 13, wherein, The rate of change of each of the inner sealing portion and the outer sealing portion with respect to temperature is greater than the rate of change of the stacked portion with respect to temperature.

24. The display device according to claim 13, wherein, The adhesion between the inner coating and the inner sealing portion is less than the adhesion between the inner coating and the stacked portion. The adhesion between the outer coating and the outer sealing portion is less than the adhesion between the outer coating and the stacked portion.

25. The display device according to claim 14, further comprising: A coating, the coating being configured to surround at least one edge of the substrate; and A side sealing portion, wherein the side sealing portion is disposed on the outside of the coating.

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