Stretchable display device

Abstract

A stretchable display apparatus includes a transistor substrate including a first area in which a plurality of pixel substrates are disposed on a base substrate and a second area in which a surface of the base substrate is exposed between the plurality of first areas; a connection line connecting each of the plurality of pixel substrates to an adjacent pixel substrate and extending over the plurality of pixel substrates, and disposed in the second area accordingly; and a restoration pattern disposed in the second area apart from the connection line. The restoration pattern includes a first restoration pattern disposed in the second area to overlap the connection line disposed in the second area, and a second restoration pattern disposed apart from the first restoration pattern by a first interval to have a shape corresponding to a shape of a local area along a shape of the connection line.

Description

[0001] Cross-reference to related applications

[0002] This application is the national phase of PCT International Application No. PCT / KR2021 / 005670, filed on May 6, 2021, which claims priority to Korean Patent Application No. 10-2020-0081397, filed in Korea on July 2, 2020, pursuant to 35U.SC119(a). The entire contents of all such applications are hereby expressly incorporated by reference. Technical Field

[0003] This disclosure relates to a stretchable display device. Background Technology

[0004] With the advancement of information technology, the market for display devices, which serve as connection media for connecting users to information, is growing. Consequently, the use of display devices such as organic light-emitting diode (OLED) devices, liquid crystal display (LCD) devices, and plasma display panels (PDP) is increasing.

[0005] Recently, with advancements in technologies related to display devices, flexible display devices that can be folded, bent, or rolled up are being researched and developed. Flexible display devices can be implemented in various types, such as bendable, foldable, and rollable displays. Furthermore, stretchable display devices capable of being stretched in either the width or length direction are also under active research and development.

[0006] Such stretchable display devices can be used in televisions (TVs), automotive displays, wearable devices, and mobile devices such as smartphones and tablet PCs, and their applications are expanding. However, stretchable display devices may be subjected to considerable stress in certain areas, which could lead to cracking and breakage of various connections or damage to certain components. This reduces the reliability of the display panel and shortens the lifespan of the device. Summary of the Invention

[0007] This disclosure provides a stretchable display device in which a reduction pattern is provided on the connecting lines of the electrically connected pixel substrate to reduce stress generated in the bending areas of the connecting lines, thereby improving the reliability of the display panel.

[0008] Technical solution

[0009] To achieve these and other advantages and in accordance with the purposes of this disclosure, as embodied and broadly described herein, a stretchable display device includes: a transistor substrate comprising: a first region wherein a plurality of pixel substrates are disposed on a base substrate; and a second region wherein a surface of the base substrate is exposed between the plurality of first regions; a connecting line connecting each of the plurality of pixel substrates to an adjacent pixel substrate and extending over the plurality of pixel substrates, and correspondingly disposed in the second region; and a reproduction pattern disposed in the second region, separate from the connecting line. Here, the reproduction pattern may include a first reproduction pattern disposed in the second region to overlap with the connecting line disposed in the second region and a second reproduction pattern configured to be separated from the first reproduction pattern by a first interval to have a shape corresponding to a local region along the shape of the connecting line.

[0010] Furthermore, each of the connecting line and the first restoration pattern may include a first shape region arranged in a wavy shape and a second shape region arranged in a straight line, the first shape region and the second shape region being set as a single body, and the second restoration pattern may be set as a shape corresponding to the outer peripheral surface of the first shape region.

[0011] In addition, a third reproduction pattern may be provided, which is set to correspond to the inner peripheral surface of the first shape region.

[0012] Here, the third restored pattern can be set as a shape selected from elliptical patterns, semi-circular patterns, linear patterns and combinations thereof, which have island shapes along the inner periphery of the first shape.

[0013] The first to third restored patterns can include the same material.

[0014] The second restored pattern may also include a connecting pattern that connects the second restored pattern to the third restored pattern.

[0015] Here, one side of the end portion of the third restoration pattern can be configured to be adjacent to the inner peripheral surface of the first shape region, and the other side of the end portion of the third restoration pattern can be configured to be adjacent to the boundary portion between the first shape region and the second shape region. The end portion of the other side of the third restoration pattern can be connected to the connecting pattern, and the end portions of one side and the other side of the connecting pattern can be connected to the end portions of multiple second restoration patterns.

[0016] The first restored pattern can be set to contact the side surface of the corresponding pixel substrate among multiple pixel substrates.

[0017] Furthermore, the first restored pattern can be set to have a thickness less than or equal to the thickness of each of the plurality of pixel substrates.

[0018] The pattern can include one or more materials selected from polyimide (PI)-based resins, epoxy resin-based resins, and their compounds, wherein each material has the same flexibility as the substrate.

[0019] The first gap can be in the range of about 0.01 μm to about 4 μm (e.g., 2 μm).

[0020] Furthermore, the third reduction pattern and the connecting line can be configured to be separated from each other by a second gap, and the second gap is in the range of about 0.01 μm to about 4 μm (e.g., 2 μm).

[0021] Multiple connecting lines can be set, and the first restored pattern can be set to correspond to each of the multiple connecting lines.

[0022] The transistor substrate according to embodiments of the present disclosure may include: a pixel substrate having a rigidity greater than that of the substrate substrate, disposed only in a first region of the substrate substrate; a buffer layer disposed on each of a plurality of pixel substrates; a transistor including a gate electrode disposed on the buffer layer, a gate line formed with the gate electrode, a gate insulating layer disposed on the gate electrode, an active layer disposed on the gate insulating layer, an interlayer insulating layer disposed on the active layer, a source / drain electrode disposed on the interlayer insulating layer, a data line formed with the source / drain electrode, and a planarization layer disposed on the source / drain electrode and the data line; a data line pad and a gate line pad disposed on the planarization layer and respectively connected to the data line and the gate line; and an organic light-emitting device connected to the transistor, wherein the connection line may include a first connection line connected to the gate line pad to travel in the width direction of the plurality of pixel substrates and a second connection line connected to the data line pad to travel in the length direction of the plurality of pixel substrates.

[0023] The buffer layer may include a material selected from silicone rubber including polydimethylsiloxane (PDMS), elastomers including polyurethane (PU), and compounds thereof.

[0024] An organic light-emitting device according to an embodiment of the present disclosure may include an anode connected to a transistor and disposed on a planarization layer, a dam including an opening portion exposing a portion of the anode and a contact hole exposing a portion of each of a data line pad and a gate line pad, an organic light-emitting layer disposed on the anode exposed by the dam, and a cathode disposed on the organic light-emitting layer, and a first connection line and a second connection line respectively connected to the gate line pad and the data line pad exposed through the contact hole may be disposed on the dam.

[0025] Here, the gate pads, data pads, and anode can all be made of the same material.

[0026] Furthermore, the first connecting line and the second connecting line can be configured to contact the top and side surfaces of the embankment 270 disposed on the plurality of pixel substrates, the planarization layer, the interlayer insulating layer, the gate insulating layer, the buffer layer, and the side surfaces of the plurality of pixel substrates and extend to the top surface of the first restored pattern.

[0027] Specific details of other embodiments are included in the Detailed Description section and the accompanying drawings.

[0028] Advantages of the present invention

[0029] In a stretchable display device according to an embodiment of the present disclosure, the restored pattern may be configured to be adjacent to the connecting lines of the electrically connected pixel substrate, thereby reducing stress generated in the bending region of the connecting lines.

[0030] Furthermore, in the stretchable display device according to embodiments of the present disclosure, by using a reduction pattern disposed adjacent to the connecting lines, elongation characteristics can be ensured and breakage of the connecting lines can be prevented, thereby improving the reliability of the display panel.

[0031] The effects of this disclosure are not limited to the examples above, and various other effects may be included in the specification. Attached Figure Description

[0032] Figure 1 This is a perspective view of a stretchable display device according to an embodiment of the present disclosure;

[0033] Figure 2 This is an exploded perspective view of a stretchable display device according to an embodiment of the present disclosure;

[0034] Figure 3 This illustrates an embodiment according to the present disclosure. Figure 2 An enlarged planar view of region A;

[0035] Figure 4 This illustrates an embodiment according to the present disclosure. Figure 3 An enlarged planar view of region B;

[0036] Figure 5 According to embodiments of this disclosure Figure 4 A cross-sectional view taken from line I-I';

[0037] Figure 6 This is a cross-sectional view schematically illustrating an example of a sub-pixel structure of a stretchable display device according to another embodiment of the present disclosure;

[0038] Figure 7 This is a plan view showing the shape of a third restored pattern of a stretchable display device according to another embodiment of the present disclosure;

[0039] Figure 8 This is a plan view showing the shape of a third restored pattern of a stretchable display device according to another embodiment of the present disclosure; and

[0040] Figure 9 This is a plan view showing the shape of a third restored pattern of a stretchable display device according to another embodiment of the present disclosure. Detailed Implementation

[0041] In the following description, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the specification, when adding reference numerals to elements in each drawing, care should be taken to use similar reference numerals already used to represent similar elements in other drawings whenever possible. In the following description, detailed descriptions of related known functions or configurations will be omitted if it is determined that they unnecessarily obscure the focus of the present disclosure. When describing embodiments, the same elements are representatively described in the opening section.

[0042] It should be understood that although this document may use ordinal terms such as "first" and "second" to describe various elements, these elements should not be limited to these terms. These terms are only used to distinguish one element from another.

[0043] The flexible display device according to this disclosure can be a display device in which the display device is disposed on a flexible substrate. Examples of flexible display devices can include organic light-emitting display devices, liquid crystal display (LCD) devices, and electrophoretic display devices; however, in this disclosure, an organic light-emitting display device will be described as an example. An organic light-emitting display device can include an organic light-emitting layer disposed between a first electrode (anode) and a second electrode (cathode) and comprising an organic material. Therefore, an organic light-emitting display device can be a self-emissive display device, wherein holes supplied from the first electrode and electrons supplied from the second electrode combine in the organic light-emitting layer to generate excitons, which are hole-electron pairs, and emit light using energy generated based on the transition of the excitons to the ground state.

[0044] The flexible display device according to this disclosure can be a stretchable display device. A stretchable display device can refer to a display device that can display images even when bent or stretched. A stretchable display device can have greater flexibility than a typical display device. Therefore, a user can allow the stretchable display device to bend or stretch, and thus the shape of the stretchable display device can be freely changed based on the user's manipulation. For example, when a user pulls one end of the stretchable display device with their hand, the stretchable display device can be stretched by the user's force. Alternatively, when a user places the stretchable display device on a non-flat wall, the stretchable display device can be configured to bend along the shape of the wall surface. Furthermore, when the force applied by the user is released, the stretchable display device can return to its original shape.

[0045] Figure 1 This is a perspective view of a stretchable display device 1000 according to an embodiment of the present disclosure, and Figure 2 This is an exploded perspective view of a stretchable display device 1000 according to an embodiment of the present disclosure.

[0046] like Figure 1 and Figure 2 As shown, a stretchable display device 1000 according to an embodiment of the present disclosure may include a display panel 100, a connecting member 800, and a flexible printed circuit board (FPCB) 300.

[0047] The display panel 100 may be elastic in one of the first direction X and the second direction Y. The display panel 100 may be two-dimensionally elastic in the first direction X and the second direction Y. Here, the first direction X and the second direction Y may form a plane of the stretchable display device 1000, and the second direction Y may be a direction perpendicular to the first direction X.

[0048] The display panel 100 may include a transistor substrate 110 and an encapsulation film 400. Furthermore, the display panel 100 may also include a polarizer, which may be disposed below the transistor substrate 110 or on the encapsulation film 400.

[0049] The encapsulation film 400 may be configured to overlap with the transistor substrate 110 and may be a substrate used to protect some components of the display panel 100. The encapsulation film 400 may be a flexible substrate and may include a bendable or flexible material. For example, the encapsulation film 400 may include, but is not limited to, an elastic material.

[0050] The display panel 100 may include a display area A / A for displaying images and a non-display area N / A configured to surround the display area A / A in an area adjacent to the display area A / A.

[0051] The display area A / A may include multiple pixels, and each pixel may include multiple sub-pixels. Each of the multiple sub-pixels may include a light-emitting device and may be connected to various lines such as gate lines, data lines, high-level power lines, low-level power lines, and reference voltage lines.

[0052] The non-display area N / A can be an area adjacent to and surrounding the display area A / A, and can be an area where no image is displayed. Circuit units and lines configured to extend from lines disposed in the display area A / A can be disposed in the non-display area N / A. For example, multiple bonding pads or signal pads can be disposed in the non-display area N / A, and each pad can be connected to each of multiple sub-pixels in the display area A / A.

[0053] The connecting member 800, which connects to other components in the non-display area N / A and is located outside the non-display area N / A, can transmit signals input from the FPCB 300 to the display panel 100. That is, the connecting member 800 can be a connecting film disposed between the display panel 100 and the FPCB 300 and electrically connects the display panel 100 to the FPCB 300.

[0054] The connecting member 800 can be bonded to a plurality of bonding pads disposed in the non-display area N / A, and can supply source voltage, data voltage and gate voltage to each of the plurality of sub-pixels in the display area A / A through the bonding pads.

[0055] The connecting member 800 may include a base film 810, a driving circuit chip 820 disposed on the base film 810, and multiple conductive lines disposed on the base film 810 and transmitting driving signals or control signals.

[0056] The base film 810 may be a layer supporting the driving circuit chip 820. The base film 810 may include a flexible insulating material, and for example, may include a polyimide (PI) based resin or an epoxy resin.

[0057] The driver circuit chip 820 can process data used to process images input from an external source and the drive signals used to process that data. Figure 1 and Figure 2 In the diagram, the driver circuit chip 820 is shown as being mounted as a chip-on-film (COF) type, but is not limited thereto and can also be mounted as a type such as a chip-on-glass (COG) type or a carrier package (TCP) type.

[0058] Furthermore, the connecting member 800 may also include multiple conductive lines disposed on at least one surface of the base film 810. These conductive lines can transmit image data and drive data input from the FPCB 300 to the drive circuit chip 820, and can transmit data signals and drive control signals output from the drive circuit chip 820 to the display panel 100. The conductive lines may all be wavy, zigzag, or diamond-shaped to minimize damage during elongation.

[0059] According to an embodiment of the present disclosure, the stretchable display device 1000 can separate the base film 810 of the connecting member 800 to correspond one-to-one with each of the multiple conductive lines disposed on the base film 810. Therefore, when the display panel 100 is elongated, the connecting member 800 can deform accordingly, thereby minimizing the stress on the connecting member 800 caused by the elongation of the display panel 100.

[0060] The transistor substrate 110 may be a substrate that supports some components disposed in the display panel 100. The transistor substrate 110 may include a base substrate 111 and a pixel substrate 115 of the transistor substrate 110. The base substrate 111 comprises a flexible material and is bendable or stretchable. The pixel substrate 115 is disposed on the base substrate 111 and comprises a rigid material that is more ridged than the material of the transistor substrate 110 (for example, the transistor substrate 110 may be more flexible than the individual pixel substrate 115).

[0061] Here, the pixel substrates 115 of the transistor substrate 110 may not be disposed on the front surface of the base substrate 111 of the transistor substrate 110, but may be selectively disposed in an island shape in a predetermined area, and adjacent pixel substrates 115 may be disposed separately from each other. For example, multiple pixel substrates 115 may be arranged in a grid or array form.

[0062] In addition, a first region F1 and a second region F2 with different elastic moduli can be defined in the display area A / A and the non-display area N / A.

[0063] Here, in the display area A / A, the first area F1 can be an area in which each of a plurality of pixels is disposed, and the second area F2 can be an area in which a plurality of connecting lines 500 electrically connecting pixels are disposed. More specifically, the first area F1 can be an area in which a pixel substrate 115 is disposed, and the second area F2 can be an area in which the surface of the substrate 111 is exposed because the pixel substrate 115 is not disposed in the second area F2 (for example, the second area F2 can refer to the space between two adjacent first areas F1).

[0064] Furthermore, in the non-display area N / A, the first area F1 may be an area in which bonding pads or signal pads electrically connected to the connecting member 800 or circuit units that apply drive signals to each of the plurality of pixels are disposed, and the second area F2 may be an area in which the connecting line 500 disposed in the display area A / A is configured to extend.

[0065] The multiple connecting lines 500 can be wavy, zigzag, or diamond-shaped to minimize damage during elongation. For example, the multiple connecting lines 500 can have a form that includes alternating curved sections.

[0066] In the stretchable display device 1000 according to an embodiment of the present disclosure, in the case where multiple connecting lines 500 are provided in the second region F2 of the substrate 111 to connect the pixel substrate 115, the connecting lines 500 can deform accordingly, thereby minimizing the stress on the connecting lines 500 caused by the elongation of the display panel 100.

[0067] The stretchable display device 1000 according to embodiments of the present disclosure will be described in more detail below. In particular, the structure of the stretchable display panel 100 among the elements of the stretchable display device 1000 will be described in more detail.

[0068] Figure 3 It is shown Figure 2 An enlarged plan view of region A. Figure 4 It is shown Figure 3 An enlarged planar view of region B, and Figure 5 It is along Figure 4 The cross-sectional view taken from line I-I'.

[0069] like Figures 3 to 5 As shown, the transistor substrate 110 of the stretchable display device 1000 according to an embodiment of the present disclosure may include a base substrate 111, a plurality of pixel substrates 115, (a plurality of) connecting lines 500 and a reproduction pattern 700.

[0070] The substrate 111 may be a substrate that supports and protects some components of the stretchable display device 1000. The substrate 111 may be a flexible substrate and may include a bendable or flexible insulating material. For example, the substrate 111 may include silicone rubber such as polydimethylsiloxane (PDMS) or an elastomer such as polyurethane (PU). However, the material of the substrate 111 is not limited to these.

[0071] The substrate 111 may have an elastic modulus from a few MPa to several hundred MPa, and its elongation failure rate may be 100% or higher. The thickness of the substrate 111 may be from about 10 μm to about 1 mm (e.g., 0.5 mm), but is not limited thereto.

[0072] Multiple pixel substrates 115 may be disposed on a substrate 111. Each pixel substrate 115 may be a rigid substrate that is more rigid than the substrate 111, and may be disposed separately from each other in a first region F1 of the substrate 111. More specifically, the elasticity of the multiple pixel substrates 115 may be less than that of the substrate 111, and the multiple pixel substrates 115 may have rigid characteristics (e.g., the substrate 111 may be more flexible than the multiple pixel substrates 115).

[0073] The elastic modulus of the plurality of pixel substrates 115 may be 1000 or more higher than that of the base substrate 111. The plurality of pixel substrates 115 may comprise a flexible plastic material, and for example, may comprise a PI-based resin or an epoxy-based resin.

[0074] As described above, the substrate 111 and the plurality of pixel substrates 115 can have different rigidities, and therefore, the transistor substrate 110 can have different elastic moduli. Therefore, the transistor substrate 115 of the stretchable display device according to embodiments of the present disclosure may include a first region F1 and a second region F2 with different elastic moduli.

[0075] More specifically, the first region F1 can be a region in which pixel substrates 115 are disposed, and the second region F2 can be a region in which pixel substrates 115 are not disposed, such as the region between adjacent pixel substrates 115. The elastic modulus of the first region F1 can be higher than that of the second region F2. Here, the modulus can be an elastic coefficient representing the ratio of deformation caused by stress to the stress applied to the substrate, and when the modulus is relatively high, the rigidity can be relatively high. For example, the first region F1 is more resistant to deformation than the second region F2.

[0076] Therefore, the first region F1 can be a region with a rigidity greater than that of the second region F2. Thus, pixels PX, including a plurality of sub-pixels SPX for displaying an image, can be disposed in the first region F1 (e.g., each of the plurality of pixel substrates 115). Reference will be made below. Figure 6 A detailed description of the structure of each sub-pixel SPX.

[0077] The connecting line 500 can be disposed between multiple pixel substrates 115 (e.g., in the second region F2). The connecting line 500 can be disposed between pads or lines disposed on multiple pixel substrates 115 and can electrically connect the pads or lines.

[0078] The connecting line 500 may include a first connecting line 510 and a second connecting line 520. The first connecting line 510 may be a line arranged along the x-axis direction in the display panel 100, and the second connecting line 520 may be a line arranged along the y-axis direction in the display panel 100.

[0079] exist Figure 3 In the diagram, the connecting line 500 is illustrated as having a wavy shape, but is not limited to this, and can be set to a zig or diamond shape to prevent damage to the connecting line 500 when the display panel 100 is extended.

[0080] In typical organic light-emitting diode (OLED) display devices, various lines, such as multiple gate lines and multiple data lines, can be configured to extend between multiple sub-pixels, and multiple sub-pixels can be connected to a single signal line. Therefore, in typical OLED display devices, various lines, such as gate lines, data lines, high-level power lines, low-level power lines, and reference voltage lines, can extend from one side of the OLED display device to the other on the substrate without interruption.

[0081] In the stretchable display device 1000 according to an embodiment of the present disclosure, various lines such as gate lines, data lines, high-level power lines, low-level power lines and reference voltage lines are made of metallic material, and these various lines may be disposed only on a plurality of pixel substrates 115.

[0082] In other words, in the stretchable display device 1000 according to an embodiment of the present disclosure, various lines including metallic materials may be provided only on the plurality of pixel substrates 115 and may not be provided to contact the substrate 111. Therefore, the various lines may be patterned to correspond to the plurality of pixel substrates 115 and may be provided discontinuously.

[0083] In the stretchable display device 1000 according to an embodiment of the present disclosure, pads or lines on two adjacent pixel substrates 115 can be connected to each other by a connecting line 500 to connect discontinuous lines formed on a plurality of pixel substrates 115.

[0084] In other words, the connecting line 500 can be electrically connected between two adjacent pixel substrates 115 having an island shape. For example, gate lines can be provided in each of a plurality of pixel substrates 115 arranged adjacent to each other in the x-axis direction, and gate line pads can be provided on each pixel substrate 115 at both ends of the gate line.

[0085] Here, multiple gate line pads can be electrically connected to each other via a connection line 500 disposed between one pixel substrate 115 and another pixel substrate 115 adjacent to the pixel substrate 115. Furthermore, the connection line extending in the x-axis direction can be used as a gate line for transmitting gate signals.

[0086] In other words, such as Figure 3 As shown, the first connection line 510 can serve as a gate line, but is not limited to this, and can also serve as a low-level power supply line. In other words, multiple connection lines 500 can be configured and can be used as both low-level power supply lines and gate lines.

[0087] The second connection line 520 can connect, in the y-axis direction, two adjacent pads or lines on a plurality of adjacent pixel substrates 115. Multiple second connection lines 520 can be provided and can be used as data lines, high-level power lines, and gate lines, but are not limited thereto.

[0088] At least one of the first connecting line 510 and the second connecting line 520 of the connecting line 500 may include at least one material selected from the group consisting of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd) and copper (Cu), or alloys thereof.

[0089] A stretchable display device 1000 according to an embodiment of the present disclosure may include a reduction pattern 700 disposed in a second region F2 of a transistor substrate 110.

[0090] The restored pattern 700 can be disposed in the second region F2 of the substrate 111, and can include a first restored pattern 710 disposed overlapping the connecting line 500 and a second restored pattern 720 spaced apart from the first restored pattern 710 and disposed along the shape of the connecting line 500 in a shape corresponding to the local region.

[0091] For details, please refer to Figure 4 and Figure 5 The first restored pattern 710 can be disposed between the substrate 111 and the connecting line 500. In other words, the first restored pattern 710 can be configured to have the same shape as the connecting line 500 in the second region F2, but is not limited thereto, and can be configured to have a region wider than the connecting line 500, depending on the situation.

[0092] The first restored pattern 710 and the connecting line 500 may include a first shape region Q1 configured as a wave shape or as a curved portion and a second shape region Q2 configured as a straight shape (e.g., having a straight portion). The first shape region Q1 and the second shape region Q2 may form a single body and may be arranged alternately to form a repeating pattern including curved and straight portions.

[0093] Furthermore, the first shaped region Q1, arranged in a wavy shape, may include an outer peripheral surface OCP and an inner peripheral surface ICP formed in the curved region. Compressive tension may occur in the outer peripheral surface OCP of the first shaped region Q1, thus potentially generating stress in the outer peripheral surface OCP of the connecting line 500. This stress may cause cracking along the outer peripheral surface OCP of the connecting line 500. Cracking can increase the breakdown or resistance of the connecting line 500, leading to a decrease in the overall reliability of the display panel 100.

[0094] Therefore, in the stretchable display device 1000 according to an embodiment of the present disclosure, the second reduction pattern 720 for reducing stress generated along the outer peripheral surface OCP of the connecting line 500 can be configured to correspond to the shape of the outer peripheral surface OCP of the first shape region Q1. In other words, because the second reduction pattern 720 is configured to correspond to the shape of the outer peripheral surface OCP of the first shape region Q1, the second reduction pattern 720 can be formed into a wavy or curved shape. For example, the second reduction pattern 720 can be used as a type of reinforcing rib that can dissipate stress or force generated due to stretching along a large area of ​​the connecting line 500, thereby helping to alleviate any pressure points or prevent breakage in the connecting line 500 when it is bent or stretched.

[0095] In the first shape region Q1 of the connecting pattern 500, the second reduction pattern 720 can be configured to be separated from the connecting pattern 500 by a first gap D1. The first gap D1 can be in the range of about 0.01 μm to about 4 μm (e.g., 2 μm). The first gap D1 can be a space for absorbing stress appearing in the outer peripheral surface OCP of the connecting line 500. When the first gap D1 is less than about 0.01 μm, the connecting line 500 can be configured to be adjacent to the first reduction pattern 710, thus reducing the efficiency of transferring stress from the connecting line 500 to the second reduction pattern 720. When the first gap D1 is greater than about 4 μm, the separation distance between the second reduction pattern 720 and the connecting line 500 can be increased, thus the second reduction pattern 720 may not easily absorb the stress of the connecting line 500.

[0096] Furthermore, in the stretchable display device 1000 according to an embodiment of the present disclosure, a third reduction pattern 730 for reducing stress generated along the inner peripheral surface ICP of the connecting line 500 may be provided on the inner peripheral surface ICP of the first shape region Q1.

[0097] The third restored pattern 730 can be formed as an island pattern along the inner peripheral surface ICP of the first shape region Q1. As another example, the third restored pattern 730 can be set to a shape selected from elliptical patterns, semi-circular patterns, circular patterns, linear patterns, rectangular patterns, triangular patterns, and combinations thereof. As another example, the third restored pattern 730 can be connected to the second restored pattern 720.

[0098] In the inner peripheral surface ICP of the first shape region Q1, the connecting pattern 500 and the third reduction pattern 730 can be configured to be spaced apart from each other by a second gap D2. The second gap D2 can be in the range of about 0.01 μm to about 4 μm (e.g., 2 μm). The second gap D2 can be a space for absorbing stress that occurs in the inner peripheral surface ICP of the connecting line 500. When the second gap D2 is less than about 0.01 μm, the connecting line 500 can be configured to be adjacent to the first reduction pattern 710, thus reducing the efficiency of transferring stress from the connecting line 500 to the third reduction pattern 730. When the second gap D2 is greater than about 4 μm, the separation distance between the third reduction pattern 730 and the connecting line 500 can be increased, thus making it less likely for the third reduction pattern 730 to absorb stress from the connecting line 500.

[0099] The reduction pattern 700, which includes the first, second, and third reduction patterns 710, 720, and 730, may include at least one material selected from PI-based resins or epoxy resins and their compounds, wherein each material has the same or similar flexible properties as the substrate 111.

[0100] The reduction pattern 700, which includes the first, second, and third reduction patterns 710, 720, and 730, can include the same material. Therefore, even without additional processing, the cracks that occur on the outer peripheral surface OCP and the inner peripheral surface ICP of the wavy or curved first shape region Q1 of the connecting pattern 500 can be minimized.

[0101] Therefore, the restored pattern 700 of the stretchable display device 1000 according to the embodiments of the present disclosure can prevent or minimize cracks in the connecting lines 500 when the substrate 111 is bent, stretched or contracted, thereby improving the reliability of the display panel 100.

[0102] In the stretchable display device 1000 according to an embodiment of the present disclosure, a substrate 111 having flexible properties may be disposed below a plurality of pixel substrates 115.

[0103] Therefore, the area of ​​the substrate 111 other than the area overlapping with the plurality of pixel substrates 115 can be easily stretched or bent, thus enabling the implementation of a stretchable display device 1000.

[0104] Furthermore, when the stretchable display device 1000 is bent or stretched, it can prevent the transistors and organic light-emitting devices disposed on the multiple pixel substrates 115, which are rigid substrates, from being damaged.

[0105] The subpixel structure SPX of the stretchable display device 1000 according to this disclosure will be described in more detail below.

[0106] Figure 6 This is a cross-sectional view schematically illustrating an example of the sub-pixel structure of a stretchable display device 1000 according to an embodiment of the present disclosure.

[0107] refer to Figure 6 In the stretchable display device 1000 according to an embodiment of the present disclosure, a plurality of pixel substrates 115 may be disposed in a first region F1 of a base substrate 111, and a buffer layer 213 may be disposed on the pixel substrates 115.

[0108] The buffer layer 213 can be disposed on multiple pixel substrates 115 to protect the various components of the stretchable display device 1000 from the penetration of oxygen and water from the outside.

[0109] The buffer layer 213 may include an insulating material and may be formed, for example, by a single layer or multiple layers including an organic layer, such as silicon nitride (SiNx), silicon oxide (SiOx), or silicon oxynitride (SiON).

[0110] Here, the buffer layer 213 may be formed only in the area overlapping with the plurality of pixel substrates 115. As described above, the buffer layer 213 may include organic materials, and therefore may be prone to breakage and damage during the stretchable display device 1000. Therefore, the buffer layer 213 may not be formed in the area between the plurality of pixel substrates 115, and may be patterned to resemble the shape of the plurality of pixel substrates 115, and thus may be formed only on the plurality of pixel substrates 115 (e.g., the buffer layer 213 may be divided into a grid pattern corresponding to the plurality of pixel substrates 115).

[0111] Therefore, in the stretchable display device 1000 according to the embodiments of the present disclosure, the buffer layer 213 may be formed only in the area overlapping with the plurality of pixel substrates 115 which are rigid substrates, so that even if the stretchable display device 1000 undergoes deformation such as bending or stretching, damage to the buffer layer 113 can be prevented.

[0112] As another example, the buffer layer 213 disposed in the first region F1 of the protrusion may comprise a material selected from silicone rubber including polydimethylsiloxane (PDMS), elastomers including polyurethane (PU), and compounds thereof.

[0113] When a large Young's modulus difference exists between the stretchable second region F2 and the protruding first region F1, the pixel substrate 115 can be separated from the base substrate 111. Therefore, when a flexible material is applied to the buffer layer 213, stress can propagate extensively in the protruding first region F1. In other words, when a flexible material is applied to the buffer layer 213, a reduced amount of stress can occur in the protruding first region F1, thereby protecting the transistor (TFT, 240) characteristics.

[0114] A transistor 240, comprising a gate electrode 241, an active layer 242, a source electrode 243, and a drain electrode 244, can be formed on the buffer layer 213. To describe the process of forming the transistor 240, for example, the active layer 242 can be formed on the buffer layer 213, and a gate insulating layer 214 for insulating the active layer 242 from the gate electrode 241 can be formed on the active layer 242. An interlayer insulating layer 215 for insulating the gate electrode 241, the source electrode 243, and the drain electrode 244 can be formed, and the source electrode 243 and the drain electrode 244, both in contact with the active layer 242, can be formed on the interlayer insulating layer 215.

[0115] Furthermore, the gate insulating layer 214 and the interlayer insulating layer 215 can be patterned and can be formed only in the regions overlapping with the plurality of pixel substrates 115. The gate insulating layer 214 and the interlayer insulating layer 215 may also comprise the same inorganic material as the buffer layer 213, thus making them prone to cracking and damage during the stretchable display device 100.

[0116] Therefore, the gate insulating layer 214 and the interlayer insulating layer 215 may not be formed in the region between the plurality of pixel substrates 115 (e.g., the second region F2), and furthermore, the gate insulating layer 214 and the interlayer insulating layer 215 may be patterned to resemble the shape of the plurality of pixel substrates 115, and may be formed only on the plurality of pixel substrates 115. In other words, when the stretchable display device 1000 is stretched, the region in the second region F2 is allowed to move more freely, while the region in the first region F1 is subjected to less stretching and therefore less stress, which helps to prevent cracking or breakage.

[0117] exist Figure 6 For ease of description, only the driving transistors among the various transistors included in the stretchable display device 1000 are shown, but switching transistors, capacitors, etc., may be included in the stretchable display device 1000. Furthermore, in the specification, transistor 240 is described as having a coplanar structure, but this is not a limitation, and various transistors with interleaved structures may be used.

[0118] Gate line 261 may be disposed on gate insulating layer 214. Gate line 261 may be a line used to transmit gate signals to multiple sub-pixels SPX. Gate line 261 may include, but is not limited to, the same material as gate electrode 241. In other words, gate line 261 and gate electrode 241 may be formed as a single entity.

[0119] A planarization layer 216 may be formed on the transistor 240 and the interlayer insulating layer 215. The planarization layer 216 may planarize the upper portion of the transistor 240. The planarization layer 216 may comprise a single layer or multiple layers and may comprise an organic material. For example, the planarization layer 216 may comprise an acrylic organic material, but is not limited thereto.

[0120] The planarization layer 216 may include contact holes for electrically connecting transistor 240 to anode 251, contact holes for electrically connecting data line pad 263 to source electrode 243, and contact holes for electrically connecting gate line 261 to gate line pad 262.

[0121] A passivation layer can be formed between transistor 240 and planarization layer 216. That is, a passivation layer can be formed covering transistor 240 to protect transistor 240 from water and oxygen penetration. The passivation layer may include inorganic materials and may include a single layer or multiple layers, but is not limited thereto.

[0122] Data line pad 263, gate line pad 262 and organic light-emitting device 250 can be set.

[0123] Data line pad 263 can transmit data signals supplied via connection line 500, which serves as a data line, to multiple sub-pixels (SPX). Specifically, data line pad 263 can be connected to a second connection line 520.

[0124] Data line pads 263 can be connected to the source electrode 243 of transistor 240 through contact holes formed in planarization layer 216. In other words, in the first region F1, the data line can be formed as a single entity with the source electrode 243, and therefore does not need to be referred to by a separate reference numeral. Data line pads 263 may include, but are not limited to, the same material as, the anode 251 of organic light-emitting device 250.

[0125] Furthermore, the data line pad 263 may be formed on the interlayer insulating layer 215 instead of the planarization layer 216, and may include the same material as each of the source electrode 243 and drain electrode 244 of the transistor 240.

[0126] Gate line pad 262 can transmit gate signals supplied via connection line 500, which serves as gate line 261, to multiple sub-pixels SPX. Specifically, gate line pad 262 can be connected to first connection line 510.

[0127] Gate line pad 262 can be connected to gate line 261 through contact holes formed in planarization layer 216 and interlayer insulating layer 215, and gate signals can be transmitted to gate line pad 262.

[0128] Gate line pad 262 may include, but is not limited to, the same material as data line pad 263.

[0129] The first restored pattern 710 may be disposed within or below the first connecting line 510 and the second connecting line 520. With respect to the plane of the second region F2, the first restored pattern 710 may be formed to have the same width as the plane of the first connecting line 510 and the second connecting line 520.

[0130] Furthermore, the first restored pattern 710 can directly contact the side surface of the pixel substrate 115. Here, the first restored pattern 710 can be formed to have the same thickness as the pixel substrate 115, or it can be formed to have a thickness less than the pixel substrate 115. In the figure, it is shown that the first restored pattern 710 is formed to have a thickness less than the pixel substrate 115.

[0131] Furthermore, the connecting line 500, which overlaps with the first restored pattern 710, can be spaced apart from the second restored pattern 720 by a first interval D1, or from the third restored pattern 730 by a second interval D2. The figure shows the second restored pattern 730, but the third restored pattern 730 can be positioned along the cross-sectional surface direction. In the case where the third restored pattern 730 is positioned adjacent to the first restored pattern 710, the third restored pattern 730 can be spaced apart from the first restored pattern 710 by a separation distance corresponding to the second interval D2. For example, the first restored pattern 710 can be positioned between the second restored pattern 720 and the third restored pattern 730, and each of the first, second, and third restored patterns 710, 720, and 730 can be spaced apart from each other.

[0132] The organic light-emitting device 250 can be an element configured to correspond to each of the plurality of sub-pixels SPX and emit light with a specific wavelength. That is, the organic light-emitting device 250 can be a blue organic light-emitting device that emits blue light, a red organic light-emitting device that emits red light, a green organic light-emitting device that emits green light, or a white organic light-emitting device that emits white light, but is not limited thereto. When the organic light-emitting device 250 is a white organic light-emitting device, the stretchable display device 1000 may also include a color filter.

[0133] The organic light-emitting device 250 may include an anode 251, an organic light-emitting layer 252, and a cathode 253. Specifically, the anode 251 may be disposed on a planarization layer 216. The anode 251 may be an electrode configured to supply holes to the organic light-emitting layer 252. The anode 251 may include a transparent conductive material with a high work function. Here, the transparent conductive material may include indium tin oxide (ITO), indium zinc oxide (IZO), and indium tin zinc oxide (ITZO).

[0134] The anode 251 may include, but is not limited to, the same material as, each of the gate line pads 261 and data line pads 263 disposed on the planarization layer 216.

[0135] Furthermore, in the case where the stretchable display device 1000 is implemented as a top-emitting type, the anode 251 may also include a reflector.

[0136] Anode 251 can be spaced apart from another anode of each sub-pixel SPX and can be electrically connected to transistor 240 through contact holes in planarization layer 216. For example, in Figure 6 In the diagram, anode 251 is shown electrically connected to drain electrode 214 of transistor 240, but it can also be electrically connected to source electrode 243.

[0137] The dam 270 can be formed on the anode 251, data line pad 263, gate line pad 262, and planarization layer 216. The dam 270 can be an element that separates adjacent sub-pixels SPX.

[0138] The dam 270 may be configured to cover at least a portion of each of the two sides of the adjacent anode 251 and may expose a portion of the top surface of the anode 251. The dam 270 can solve the problem of unwanted light emission or color mixing in the sub-pixel SPX because light is emitted in the lateral direction of the anode 251 due to current concentration at the corner of the anode 251. The dam 270 may include, but is not limited to, acrylic resin, benzocyclobutene (BCB) based resin, or polyimide.

[0139] The embankment 270 may include a contact hole CH for connecting a data line pad 263 to a second connection line 520 used as a data line, and a contact hole CH for connecting a gate line pad 262 to a first connection line 510 used as a gate line. Therefore, the data line pad 263 exposed at the contact hole CH may be disposed on the embankment 270, and the first connection line 510 and the second connection line 520 may be disposed on the data line pad 263 and the gate line pad 262, respectively.

[0140] The connecting line 500, including the first connecting line 510 and the second connecting line 520, can be formed to contact the top and side surfaces of the embankment 270 disposed on the pixel substrate 115, the planarization layer 216, the interlayer insulating layer 215, the gate insulating layer 214, the buffer layer 214 and the side surfaces of the plurality of pixel substrates 115, and extend to the top surface of the first reduction pattern 710.

[0141] In addition, the connection line 500 can contact the line pads 262 and 263 (e.g., data line pad 263 and gate line pad 262) on the pixel substrate 115 closest to it among the plurality of pixel substrates 115.

[0142] An organic light-emitting layer 252 may be disposed on the anode 251. The organic light-emitting layer 252 may be configured to emit light. The organic light-emitting layer 252 may include a light-emitting material, and the light-emitting material may include a phosphorescent material or a fluorescent material. However, this disclosure is not limited thereto.

[0143] The organic light-emitting layer 252 may include a single light-emitting layer. Alternatively, the organic light-emitting layer 252 may have a stacked structure in which multiple light-emitting layers are stacked and a charge-generating layer is disposed therebetween. Furthermore, the organic light-emitting layer 252 may also include at least one organic layer selected from the following: a hole transport layer, an electron transport layer, a hole blocking layer, an electron blocking layer, a hole injection layer, and an electron injection layer.

[0144] Cathode 253 may be disposed on organic light-emitting layer 252. Cathode 253 may supply electrons to organic light-emitting layer 252. Cathode 253 may include a transparent conductive oxide, such as ITO, IZO, ITZO, zinc oxide (ZnO), tin oxide (TO), or ytterbium (Yb) alloy. Alternatively, cathode 253 may include a metallic material.

[0145] The cathode 253 can be patterned and formed to overlap with each of the plurality of pixel substrates 115. That is, the cathode 253 can be formed only in the region overlapping with the plurality of pixel substrates 115, and may not be disposed in the region between the plurality of pixel substrates 115. The cathode 253 may comprise a material such as a transparent conductive oxide or a metallic material; therefore, in the case where the cathode 253 is formed between the plurality of pixel substrates 115, the cathode 253 may be damaged during the shrinking and stretching of the stretchable display device 1000.

[0146] Therefore, in terms of the plane, the cathode 253 can be formed corresponding to each of the plurality of pixel substrates 115. The cathode 253 can be formed having a region that does not overlap with the region where the connecting line 500 is disposed, or a region that overlaps with the plurality of pixel substrates 115.

[0147] Unlike typical organic light-emitting display devices, in the stretchable display device 1000 according to embodiments of the present disclosure, the cathode 253 can be patterned and formed corresponding to a plurality of pixel substrates 115. Therefore, each of the plurality of cathodes 253 disposed on the plurality of pixel substrates 115 can be independently supplied with low-level power via connecting lines 500. This means that light for implementing an input image can be provided at a location corresponding to the pixel substrate 115.

[0148] As described above, when the substrate 111 is bent, stretched or contracted, the restored pattern 700 of the stretchable display device 1000 according to the embodiments of the present disclosure can prevent or minimize breakage in the connecting lines 500, thereby improving the reliability of the display panel 100.

[0149] Therefore, in the stretchable display device 1000 according to an embodiment of the present disclosure, the restored pattern 700 can be configured to be adjacent to the connecting line 500 electrically connecting the plurality of pixel substrates 115, thereby reducing the stress that occurs in the bending region of the connecting line 500.

[0150] Furthermore, in the stretchable display device 1000 according to an embodiment of the present disclosure, the flexibility characteristics can be ensured by using the restoration pattern 700 disposed adjacent to the connecting line 500, and the breakage of the connecting line 500 can be prevented, thereby improving the reliability of the display panel.

[0151] Figure 7 This is a plan view showing the shape of a third restored pattern of a stretchable display device according to another embodiment of the present disclosure, and Figure 8 This is a plan view showing the shape of a third restored pattern of a stretchable display device 1000 according to another embodiment of the present disclosure.

[0152] In description Figure 7 and Figure 8 Repeated explanations are omitted here, and for ease of explanation, the following is combined with... Figure 1-6 refer to Figure 7 and Figure 8 Please provide an explanation.

[0153] refer to Figure 7 and Figure 8 According to embodiments of the present disclosure, the stretchable display device 1000 may include a plurality of third restoration patterns 730-2 and 730-3, and the third restoration patterns 730-2 and 730-3 may be formed in a semi-circular or elliptical shape.

[0154] The third reduction pattern 730-2 with island-shaped pattern and semi-circle and the third reduction pattern 730-3 with island-shaped pattern and ellipse can be formed along the inner peripheral surface ICP of the connecting line 500, and can reduce the stress of the first shape region Q1.

[0155] In the case where the third reduction pattern 730 is formed as an island-shaped linear or dotted pattern, a structure corresponding to the shape of the inner peripheral surface ICP of the connecting line 500 may not be implemented, and therefore, some stress generated in the inner peripheral surface ICP of the first shape region Q1 can be transferred to the peripheral region. However, in the case where the third reduction pattern 730-3 is formed to correspond to the shape of the inner peripheral surface ICP of the first shape region Q1, the semi-circular third reduction pattern 730-2 and the elliptical third reduction pattern 730-3 can effectively reduce the stress generated in the inner peripheral surface ICP. For example, the shapes of the third reduction patterns 730-2 and 730-3 can effectively distribute the stress generated due to the large area stretching along the curved portion of the connecting line 500, thereby reducing the stress borne by any individual point on the connecting line 500, which helps to prevent breakage.

[0156] Therefore, in the stretchable display device 1000 according to an embodiment of the present disclosure, the restoration pattern 730 may be configured to be adjacent to the connection line 500 electrically connecting the plurality of pixel substrates 115, and specifically, the third restoration pattern 730-2 having a semicircle and the third restoration pattern 730-3 having an ellipse may be provided along the inner peripheral surface ICP, thereby reducing the stress generated in the bending region of the connection line 500.

[0157] Furthermore, in the stretchable display device 1000 according to the embodiments of the present disclosure, the flexibility characteristics can be ensured by using the restoration pattern 730 (specifically, the third restoration pattern 730-2 having a semicircle and the third restoration pattern 730-3 having an ellipse) disposed adjacent to the connecting line 500, and the breakage of the connecting line 500 can be prevented, thereby improving the reliability of the display panel 100.

[0158] Therefore, when the substrate 111 is bent, stretched or contracted, the restored pattern 730 of the stretchable display device 1000 according to the embodiments of the present disclosure can minimize the breakage that occurs in the connecting lines 500, thereby improving the reliability of the display panel 100.

[0159] Figure 9 This is a plan view showing the shape of a third restored pattern of a stretchable display device 1000 according to another embodiment of the present disclosure.

[0160] In description Figure 9 At that time, repeated descriptions were omitted, and for the sake of convenience, the combination of... Figure 1-6 refer to Figure 9 The following description is provided.

[0161] refer to Figure 9 According to another embodiment of the present disclosure, the stretchable display device 1000 may include a restoration pattern 700, and the restoration pattern 700 may include a second restoration pattern 720, a third restoration pattern 730 and a connection pattern 750 connecting the second restoration pattern 720 to the third restoration pattern 730.

[0162] The third reduction pattern 730 can be formed as a linear pattern along the second shape region Q2. Here, the third reduction pattern 730 is not limited to a linear pattern, and multiple third reduction patterns 730 can be arranged along the second shape region Q2. Alternatively, as... Figure 7 and Figure 8 As shown, the third restored pattern 730 can be formed into an ellipse, and specifically, Figure 8 The elliptical third reduction pattern 730-3 can be set in a direction of rotation of 90 degrees.

[0163] One side of the end portion of the third restored pattern 730 may be configured to be adjacent to the inner peripheral surface ICP of the first shape region Q1, and the other side of the end portion of the third restored pattern 730 may be configured to be adjacent to the end portion of the second shape region Q2.

[0164] The end portion on the other side of the third restoration pattern 730 can be connected to the connecting pattern 750, and the end portions on one side and the other side of the connecting pattern 750 can be connected to the end portions of multiple second restoration patterns 720, and thus the connecting pattern 750 can connect the second restoration pattern 720 to the third restoration pattern 730.

[0165] The connecting pattern 750 can be disposed at the portion (e.g., the boundary portion) where the first shape region Q1 of the connecting line 500 connects to the second shape region Q2 of the connecting line 500. Therefore, the connecting pattern 750 for reducing stress can be formed upward to the boundary portion of the first shape region Q1, thereby reducing the stress generated in the bending region of the connecting line 500.

[0166] Therefore, in another embodiment of the stretchable display device 1000 according to the present disclosure, the restoration pattern 700 may be configured to be adjacent to the connection line 500 electrically connecting the plurality of pixel substrates 115, and specifically, a connection pattern 750 connecting the third restoration pattern 730 to the second restoration pattern 720 may be further configured to reduce the stress generated in the bending region of the connection line 500.

[0167] Furthermore, in another embodiment of the stretchable display device 1000 according to the present disclosure, flexibility can be ensured by using a restoration pattern 700 disposed adjacent to the connection line 500 (e.g., a connection pattern 750 that connects the third restoration pattern 730 to the second restoration pattern 720), and breakage of the connection line 500 can be prevented, thereby improving the reliability of the display panel 100.

[0168] Therefore, when the substrate 111 is bent, stretched, or contracted, the restoration pattern 730 of the stretchable display device 1000 according to another embodiment of the present disclosure can minimize breakage in the connecting lines 500, thereby improving the reliability of the display panel 100. Furthermore, the restoration pattern 700 helps the display device 1000 to be stretched reliably and safely and to return to its original shape after stretching.

[0169] While this disclosure has been specifically shown and described with reference to exemplary embodiments thereof, those skilled in the art will understand that various changes in form and detail may be made therein without departing from the spirit and scope of this disclosure as defined by the following claims.

Claims

1. A stretchable display device, comprising: Transistor substrate, including: Corresponding to multiple first regions of multiple pixel substrates disposed on a substrate substrate, and The second region between the plurality of first regions; A connecting line disposed in the second region, the connecting line electrically connecting two adjacent pixel substrates among the plurality of pixel substrates; and The restored pattern is set in the second area. The restored pattern includes: A first reduction pattern, the first reduction pattern overlapping the connecting line in a direction perpendicular to the surface of the substrate; and The second restored pattern is spaced apart from the first restored pattern by a first distance in a direction perpendicular to the extension direction of the connecting line, and has a shape corresponding to the outer periphery of the curved portion of the connecting line.

2. The stretchable display device according to claim 1, wherein, The connecting line includes the curved portion and the straight portion, and The second restored pattern is spaced apart from the connecting line.

3. The stretchable display device according to claim 2, wherein, The restored pattern also includes: A third restoration pattern is disposed in the second region and corresponds to the inner periphery of the curved portion of the connecting line, and the third restoration pattern is spaced apart from the connecting line.

4. The stretchable display device according to claim 3, wherein, The third restored pattern is set to a shape selected from elliptical patterns, semi-circular patterns, linear patterns and combinations thereof, and the third restored pattern has an island shape disposed adjacent to the inner periphery of the curved portion of the connecting line.

5. The stretchable display device according to claim 3, wherein, The first restored pattern, the second restored pattern, and the third restored pattern all use the same material.

6. The stretchable display device according to claim 3, wherein, The second restoration pattern also includes a connection pattern that connects the second restoration pattern to the third restoration pattern.

7. The stretchable display device according to claim 6, in, The first end portion of the third restored pattern is configured to be adjacent to the inner periphery of the curved portion of the connecting line, and the second end portion of the third restored pattern is configured to be adjacent to the boundary region located between the straight portion and the curved portion of the connecting line. Wherein, the second end portion of the third restored pattern is connected to the connecting pattern, and The connecting pattern is connected between two second reduction patterns.

8. The stretchable display device according to claim 1, wherein, The first restored pattern contacts the side surface of the corresponding pixel substrate among the plurality of pixel substrates.

9. The stretchable display device according to claim 1, wherein, The first restored pattern has a thickness less than or equal to the thickness of each of the plurality of pixel substrates.

10. The stretchable display device according to claim 1, wherein, The restored pattern includes a material selected from polyimide (PI)-based resins, epoxy resins, and their compounds, wherein the polyimide (PI)-based resins, epoxy resins, and their compounds all have the same flexibility as the substrate.

11. The stretchable display device according to claim 1, wherein, The first distance is 0.01 μm to 4 μm.

12. The stretchable display device according to claim 3, wherein, The third restored pattern is spaced apart from the connecting line by a second distance, and the second distance is from 0.01 μm to 4 μm.

13. The stretchable display device according to claim 1, wherein, The connecting lines are provided in multiple ways, and the first restored pattern is provided in multiple ways and configured to correspond to the multiple connecting lines.

14. The stretchable display device according to claim 1, wherein, The transistor substrate includes: A plurality of pixel substrates are disposed only in the plurality of first regions of the substrate, and each of the plurality of pixel substrates has a rigidity greater than that of the substrate. A buffer layer is disposed on each of the plurality of pixel substrates; A transistor, the transistor comprising: a gate electrode disposed on the buffer layer, a gate line provided as a whole with the gate electrode, a gate insulating layer disposed on the gate electrode, an active layer disposed on the gate insulating layer, an interlayer insulating layer disposed on the active layer, a source / drain electrode disposed on the interlayer insulating layer, a data line provided as a whole with the source / drain electrode, and a planarization layer disposed on the source / drain electrode and the data line; Data line pads and gate line pads are disposed on the planarization layer and respectively connected to the data line and the gate line; and An organic light-emitting device connected to the transistor, and The connecting line includes: A first connection line is connected to the gate line pad to travel in a first direction on the plurality of pixel substrates; and A second connecting line is connected to the data line pad to travel in a second direction on the plurality of pixel substrates, the second direction being different from the first direction.

15. The stretchable display device according to claim 14, wherein, The buffer layer comprises a material selected from silicone rubber including polydimethylsiloxane (PDMS), elastomers including polyurethane (PU), and compounds thereof.

16. The stretchable display device according to claim 14, wherein, The organic light-emitting device includes: The anode is connected to the transistor and disposed on the planarization layer; The embankment includes an opening portion that exposes the anode and a contact hole that exposes the portions of each of the data line pads and the gate line pads; An organic light-emitting layer is disposed on the anode exposed through the embankment; and The cathode is disposed on the organic light-emitting layer, and The first connecting line and the second connecting line, which are respectively connected to the gate line pad and the data line pad exposed through the contact hole, are disposed on the embankment.

17. The stretchable display device according to claim 16, wherein, The gate line pads, the data line pads, and the anode are made of the same material.

18. The stretchable display device according to claim 16, wherein, The first and second connecting lines contact the top surface and side surface of the embankment, a portion of the planarization layer, a portion of the interlayer insulating layer, a portion of the gate insulating layer, a portion of the buffer layer, and the side surface of the plurality of pixel substrates. The first connecting line and the second connecting line extend to the top surface of the first restored pattern.

19. The stretchable display device according to claim 1, wherein, The plurality of pixel substrates are arranged in a grid on the base substrate and are spaced apart from each other.

20. A stretchable display device, comprising: Multiple pixel substrates, wherein the multiple pixel substrates are disposed on a substrate and are separated from each other; A connecting line is disposed between two adjacent pixel substrates among the plurality of pixel substrates; as well as A restored pattern is disposed between the two adjacent pixel substrates and spaced apart from the connecting line. The restored pattern includes: A first reduction pattern overlapping the connecting line in a direction perpendicular to the surface of the substrate; and A second restoration pattern is spaced a first distance from the first restoration pattern in a direction perpendicular to the extension direction of the connecting line, the second restoration pattern having a shape corresponding to the outer periphery of the curved portion of the connecting line.

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