Elastic member and display device including the same

Abstract

An elastic member according to one embodiment includes a first layer including a first region and a second region, and a second layer on the first layer, wherein the first region is defined as a folded region, the second region is defined as an unfolded region, the first layer is disposed on the second region of the second layer, a pattern portion including a plurality of holes or a plurality of grooves is disposed in at least one of the first region and the second region of the second layer, and a thickness of the second layer is greater than a thickness of the first layer.

Description

Technical Field

[0001] The embodiments relate to an elastic member and a display device including the elastic member. Background Technology

[0002] Recently, there has been an increasing demand for flexible or foldable display devices that can easily load various applications and display images on a large screen when loaded.

[0003] This flexible or foldable display device folds or partially bends when carried or stored, and can be displayed as an unfolded display when showing images. Therefore, the image display area can be increased, and the user can easily carry the display.

[0004] After a flexible or foldable display device is folded or bent, the process of unfolding the flexible display device again can be repeated.

[0005] In other words, due to the repeated folding and unfolding operations of flexible or foldable display devices, the substrate of the flexible display device needs to have predetermined strength and elasticity, and there should be no cracking or deformation in the substrate during the folding and unfolding process.

[0006] Meanwhile, the display substrate, which serves as an elastic component constituting a flexible or foldable display device, can be applied to the display device. In other words, by placing a display panel or touch panel on the elastic component, the display substrate can be applied to a display device that displays images.

[0007] In this situation, the heat generated from the display panel or touch panel is transferred to the elastic component, and the heat is not quickly released from the inside of the elastic component, so the remaining heat may cause the elastic component to deform.

[0008] The strength and elasticity of elastic components may deform due to heat, and the folding reliability of elastic components or display devices that include elastic components may deteriorate.

[0009] Therefore, there is a need for an elastic member with a novel structure that can ensure the heat dissipation characteristics of the elastic member and prevent its deformation. Summary of the Invention

[0010] Technical issues

[0011] The embodiments are intended to provide an elastic member that can reduce thickness and has improved heat dissipation.

[0012] Technical solution

[0013] The elastic member according to the embodiment includes: a first layer including a first region and a second region; and a second layer on the first layer, wherein the first region is defined as a folding region, the second region is defined as an unfolding region, and the first layer is disposed on the second region of the second layer, wherein a patterned portion including a plurality of holes or a plurality of grooves is provided in at least one of the first region and the second region of the second layer, and the thickness of the second layer is greater than the thickness of the first layer.

[0014] The elastic member according to the embodiment is an elastic member including a first region and a second region, and the elastic member includes: a first layer; and a second layer on the first layer, wherein the first region is defined as a folding region, the second region is defined as an unfolding region, a patterned portion including a plurality of holes or a plurality of grooves is provided in at least one of the first region and the second region of the first layer, and the thermal conductivity of the first layer is greater than that of the second layer.

[0015] Beneficial effects

[0016] The elastic member according to the embodiment may include multiple layers. Specifically, the elastic member according to the embodiment can be formed by stacking layers with high thermal conductivity and layers with high strength.

[0017] Therefore, when elastic components are applied to display devices, the heat transferred from the display panel can be effectively dissipated to the outside.

[0018] Therefore, by preventing the elastic member from deforming due to heat, the elasticity and strength of the elastic member can be maintained, thus preserving the folding properties of the elastic member.

[0019] Furthermore, by making the thickness of the heat dissipation layer smaller than the thickness of the elastic member, heat can be effectively dissipated to the outside while improving the folding characteristics of the elastic member.

[0020] Furthermore, the elastic member according to the embodiment can have improved folding reliability and heat dissipation characteristics.

[0021] Specifically, in the elastic member according to the embodiment, by making the thickness of the first layer (and / or the third layer) having high thermal conductivity greater than the thickness of the second layer, the heat dissipation characteristics of the elastic member can be improved. Furthermore, by forming patterned portions in the first layer (and / or the third layer) to form openings, the compressive stress applied when the elastic member is folded can be reduced, thereby facilitating the folding of the elastic member.

[0022] Furthermore, since no additional patterned portions are formed in the second layer, which has a high yield strength, the strength of the second layer can be maintained. Therefore, when the elastic member is folded, the plastic deformation of the elastic member that occurs during folding and recovery is minimized due to the high deformation rate of the second layer.

[0023] Therefore, the elastic member according to the embodiment can have improved folding reliability and improved heat dissipation characteristics, thus eliminating the need for an additional heat dissipation layer, thereby reducing the thickness of the elastic member or the thickness of the display device using the elastic member. Attached Figure Description

[0024] Figure 1 This is a perspective view of the elastic member according to an embodiment.

[0025] Figure 2 This is a side view of the elastic member according to the first embodiment before folding.

[0026] Figure 3 This is a side view of the elastic member according to the second and third embodiments before folding.

[0027] Figure 4 This is a side view of the elastic member according to the fourth embodiment before folding.

[0028] Figure 5 This is a side view of the elastic member according to the embodiment after folding.

[0029] Figure 6 This is a top view of the first surface of the elastic member according to the first embodiment.

[0030] Figure 7 and Figure 8 This is a top view of the second surface of the elastic member according to the first embodiment.

[0031] Figure 9 This is a cross-sectional view of the elastic member according to the first embodiment.

[0032] Figure 10 This is another cross-sectional view of the elastic member according to the first embodiment.

[0033] Figure 11 This is a top view of the first surface of the elastic member according to the second embodiment.

[0034] Figure 12 This is a top view of the second surface of the elastic member according to the second embodiment.

[0035] Figures 13 to 15 This is a cross-sectional view of the elastic member according to the second embodiment.

[0036] Figures 16 to 17 This is a cross-sectional view of the elastic member according to the third embodiment.

[0037] Figure 18 This is a top view of the first surface of the elastic member according to the fourth embodiment.

[0038] Figure 19 This is a top view of the second surface of the elastic member according to the fourth embodiment.

[0039] Figures 20 to 22 This is a cross-sectional view of the elastic member according to the second embodiment.

[0040] Figures 23 to 27 It is a cross-sectional view of a display device including the elastic member according to an embodiment.

[0041] Figure 28 This is a view used to depict an application example of the elastic member according to an embodiment. Detailed Implementation

[0042] Preferred embodiments of the invention will be described in detail below with reference to the accompanying drawings. However, the spirit and scope of the invention are not limited to the portion of the described embodiments, but can be implemented in various other forms, and one or more elements of the embodiments may be selectively combined and substituted within the spirit and scope of the invention. Furthermore, unless otherwise expressly defined and described, the terminology (including technical and scientific terms) used in the embodiments of the invention may be interpreted as having the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains, and terms (e.g., terms defined in common dictionaries) may be interpreted as having a meaning consistent with their meaning in the context of the prior art.

[0043] Furthermore, the terminology used in the embodiments of the present invention is for describing embodiments and is not intended to limit the invention. In this specification, unless specifically stated in the wording, the singular form may also include the plural form, and when described as "at least one (or more) of A(and) B and C", it may include at least one of all combinations that can be combined with A, B and C.

[0044] Furthermore, when describing the elements of embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are used only to distinguish these elements from other elements, and these terms do not limit the substance, order, or sequence of these elements.

[0045] In addition, when an element is described as being “connected” or “joined” with another element, it can include not only the element being directly “connected” or “joined” with other elements, but also the element being “connected” or “joined” with another element through which the element is connected or “joined” with other elements.

[0046] Furthermore, when described as being formed or disposed "above" or "below" each element, "above" or "below" can include not only two elements directly connected to each other, but also one or more other elements formed or disposed between the two elements.

[0047] Furthermore, when expressed as "above" or "below", based on a single element, it can include not only the upward direction but also the downward direction.

[0048] In the following description, the elastic member according to an embodiment will be described with reference to the accompanying drawings.

[0049] Figures 1 to 5 These are perspective and side views of the elastic member before and after folding, according to an embodiment.

[0050] Reference Figures 2 to 4 The elastic member 1000 can be formed as a single layer or multiple layers.

[0051] Specifically, the elastic member 1000 can be formed as a multilayer. For example, the elastic member 1000 may include a multilayer comprising metal, metal alloy, plastic, composite material (e.g., carbon fiber reinforced plastic, magnetic or conductive material, glass fiber reinforced material, etc.), ceramic, sapphire, glass, etc.

[0052] Reference Figure 2 and Figure 3 The elastic member 1000 may include a first layer 1100 and a second layer 1200. Specifically, the elastic member 1000 may include a first layer 1100 and a second layer 1200 disposed on the first layer 1100.

[0053] Reference Figure 2 and Figure 3 The first layer 1100 and the second layer 1200 can have the same or different thicknesses. For example, refer to... Figure 2 and Figure 3 The thickness of the first layer 1100 can be greater than the thickness of the second layer 1200. However, the embodiments are not limited to this, and the thickness of the second layer 1200 can be greater than the thickness of the first layer 1100.

[0054] Furthermore, the dimensions of the first layer 1100 and the second layer 1200 can be different. For example, refer to... Figure 2 The first layer 1100 can be set in the area corresponding to the second area 2A of the second layer 1200. Or, refer to Figure 3 The first layer 1100 can be set in two areas corresponding to the first area 1A and the second area 2A of the second layer 1200.

[0055] In addition, refer to Figure 4 The elastic member 1000 may include a first layer 1100, a second layer 1200, and a third layer 1300. Specifically, the elastic member 1000 may include a first layer 1100, a second layer 1200 disposed on the first layer 1100, and a third layer 1300 disposed on the second layer 1200.

[0056] At least one of the first layer 1100, the second layer 1200, and the third layer 1300 may contain a metal. For example, the first layer 1100, the second layer 1200, and the third layer 1300 may contain different types of metals. Furthermore, at least one of the first layer 1100, the second layer 1200, and the third layer 1300 may contain metals with different thermal conductivity. Additionally, at least one of the first layer 1100, the second layer 1200, and the third layer 1300 may contain metals with different yield strengths.

[0057] The shape, material, and characteristics of the first layer 1100, the second layer 1200, and the third layer 1300 will be described in detail below.

[0058] The elastic member 1000 can be flexible or foldable. That is, the elastic member 1000 can be folded or bent in one direction. In other words, the elastic member 1000 can be a display substrate used in flexible display devices or foldable display devices.

[0059] In the elastic member 1000, a first direction 1D and a second direction 2D different from the first direction 1D can be defined. For example, the first direction 1D can be defined as the same direction as the folding axis direction of the elastic member 1000. In addition, the second direction can be a direction perpendicular to the first direction.

[0060] Furthermore, either the first direction 1D or the second direction 2D can be defined as the width direction of the elastic member 1000, and the other direction can be defined as the longitudinal direction of the elastic member 1000.

[0061] The elastic member 1000 can be folded in either the width direction or the longitudinal direction, which serves as the folding axis.

[0062] In the following text, for ease of description, the first direction is defined as the same direction as the folding axis. Furthermore, the first direction is defined as the width direction of the elastic member 1000, and the second direction is defined as the longitudinal direction of the elastic member 1000.

[0063] The elastic member 1000 may include at least two regions. Specifically, the elastic member 1000 may include a first region 1A and a second region 2A.

[0064] The first region 1A can be defined as the region where the elastic member 1000 is folded. That is, the first region 1A can be a folded region.

[0065] Furthermore, the second region 2A can be defined as the area where the elastic member 1000 is not folded. That is, the second region 2A can be an unfolded area.

[0066] Reference Figure 1 The elastic member 1000 can bend in one direction.

[0067] Specifically, the elastic member 1000 may include a first surface 1S and a second surface 2S opposite to the first surface 1S. In the elastic member 1000, the first surface 1S or the second surface 2S may be bent to face each other.

[0068] In the following text, for ease of description, when the elastic member 1000 is applied to a display device, the first surface 1S of the elastic member 1000 is defined as the surface facing the display panel, etc., and the second surface 2S is defined as the surface opposite to the first surface 1S.

[0069] The bending direction of the elastic member 1000 can be changed according to the residual stress on the first surface 1S and the second surface 2S. Specifically, in the elastic member 1000, the surfaces with small residual stress on the first surface 1S and the second surface 2S can be bent in a direction facing each other.

[0070] As described above, the elastic member 1000 may have a first region 1A and a second region 2A. The first region 1A and the second region 2A may be regions defined when the elastic member 1000 bends in a direction in which the first surface 1S or the second surface 2S faces each other.

[0071] Specifically, the elastic member 1000 can be bent in one direction, and the elastic member 1000 can be divided into a first folded region 1A (folded region) and a second folded region 2A (unfolded region).

[0072] Reference Figures 2 to 5 The elastic member 1000 may include a first region 1A, which is the region where the elastic member 1000 bends. In addition, the elastic member 1000 may include a second region 2A, which is not bent and is configured to be adjacent to the first region 1A.

[0073] For example, the second region 2A can be formed on the left and right sides of the first region 1A based on the bending direction of the elastic member 1000. That is, the second region 2A can be located at both ends of the first region 1A. In other words, the first region 1A can be located between the second regions 2A.

[0074] The first region 1A and the second region 2A can be formed on the same elastic member 1000. That is, the first region 1A and the second region 2A can be formed integrally with each other, without being separated from the same elastic member 1000.

[0075] The dimensions of the first region 1A and the second region 2A can be different from each other. Specifically, the dimension of the second region 2A can be larger than the dimension of the first region 1A.

[0076] Figure 5 This is a side view of the elastic member after it has been folded.

[0077] Reference Figure 5 The elastic member 1000 can be folded in one direction around the folding axis. Specifically, the first surface 1S can be folded along the folding axis in a direction where they face each other.

[0078] Since the elastic member 1000 is folded in one direction, the first region 1A and the second region 2A can be formed on the elastic member 1000. That is, the folded region formed by the elastic member 1000 is folded in one direction, and the unfolded regions located at both ends of the folded region can be formed on the elastic member 1000.

[0079] The folded region can be defined as the region that forms curvature R, and the unfolded region can be defined as the region that does not form curvature R or whose curvature is close to zero.

[0080] Reference Figures 2 to 5 The elastic member 1000 can be folded in one direction to form in the order of unfolded area, folded area and unfolded area.

[0081] Multiple patterned portions may be formed in at least one of the first region 1A and the second region 2A to reduce and disperse the stress generated when the elastic member 1000 is folded. The patterned portions will be described in detail below.

[0082] at the same time, Figure 4 The first surface 1S of the elastic member 1000 is shown folded so that it faces each other, but the embodiment is not limited to this, and the second surface 2S can also be folded so that it faces each other. That is, as described above, the bending direction of the elastic member 1000 can be changed according to the magnitude of the residual stress on the first surface 1S and the second surface 2S.

[0083] Specifically, the folded surface of the elastic member can be changed according to the formation position of the pattern portion formed on the elastic member 1000, as will be described below.

[0084] In other words, in the elastic member 1000, the surfaces on which the patterned portion of the elastic member 1000 is formed can be folded so that they face each other.

[0085] In the following, the elastic members according to various embodiments will be described in detail with reference to the accompanying drawings.

[0086] In the following text, reference will be made to Figures 6 to 10The elastic member according to the first embodiment is described.

[0087] Figures 6 to 8 This is a top view of the elastic member according to the first embodiment. Figure 6 This is a top view of the first surface of the elastic member according to an embodiment, and Figure 7 and Figure 8 This is a top view of the second surface of the elastic member according to an embodiment.

[0088] Reference Figure 6 Multiple patterned portions PA can be disposed on the first surface 1S of the elastic member 1000. According to the first embodiment, the first surface 1S of the elastic member 1000 can be a surface of the second layer 1200 in the surface of the elastic member. That is, the elastic member 1000 according to the first embodiment can include multiple patterned portions formed on the second layer 1200.

[0089] Specifically, the first patterned portion PA1 may be disposed in the first region 1A of the elastic member 1000. Furthermore, the second patterned portion PA2 may be disposed in the second region 2A of the elastic member 1000. However, the embodiment is not limited to this; the elastic member 1000 may include only the first patterned portion PA1 disposed in the first region 1A, and the patterned portion may not be disposed in the second region 2A.

[0090] At least one of the first pattern part PA1 and the second pattern part PA2 can be configured to extend in the same or similar direction as the folding axis.

[0091] The elastic member 1000 can be easily folded by the first patterned portion PA1 provided in the first region 1A.

[0092] In other words, the elastic member 1000 can reduce the thickness of the folded first region in the elastic member 1000 through the first patterned portion PA1. Therefore, the stress-generating region in the elastic member 1000 when the elastic member is folded can be reduced. That is, by reducing the thickness of the elastic member, which is proportional to the compressive stress in the first region 1A (which is the folded region of the elastic member), the compressive stress generated when the elastic member is folded can be reduced.

[0093] In other words, by reducing the thickness of the elastic member 1000 in the folded area through the first patterned part PA1, the compressive stress is reduced, thereby preventing deformation of the elastic member 1000.

[0094] The second patterned part PA2 provided in the second region 2A can improve the reliability of the elastic member 1000.

[0095] Specifically, the difference in deformation caused by heat in the first region 1A, where the first patterned portion PA1 is provided, can be mitigated by the second patterned portion PA2 provided in the second region 2A. In other words, when heat is applied to the elastic member 1000, the difference in deformation caused by heat in both the first region 1A and the second region 2A can be mitigated by forming patterned portions in both regions. Therefore, deformation or twisting of the elastic member 1000 can be prevented.

[0096] Furthermore, by reducing the unevenness of stress between the first region 1A and the second region 2A through the second patterned portion PA2 formed in the second region 2A, the bending of the elastic member can be prevented.

[0097] Furthermore, when a panel or the like is bonded to the elastic member 1000 via the second pattern portion PA2 formed in the second region 2A through the adhesive layer, since the adhesive material is configured to fill the interior of the first pattern portion PA1 in the second region 2A and the second pattern portion PA2 in the second region 2A, it is possible to prevent the adhesive layer from forming a step difference between the first region and the second region.

[0098] Furthermore, even if a second patterned portion PA2 is formed in the second region 2A, the elastic member 1000 can maintain its predetermined strength. Specifically, by retaining a region in the second region 2A where no patterned portion (e.g., a hole or groove) is formed, the region of the elastic member where no patterned portion is formed can be ensured as a specific region. Therefore, the strength of the elastic member 1000 can be ensured, and the supporting force of the elastic member 1000 supporting the panel, etc., can be ensured.

[0099] Reference Figure 7 and Figure 8 The patterned portion may or may not be provided on the second surface 2S of the elastic member 1000. The second surface 2S of the elastic member 1000 according to the first embodiment may include both the first layer 1100 and the second layer 1200 of the elastic member 1000.

[0100] Specifically, the first layer 1100 may be disposed only in the second region 2A of the elastic member 1000. Therefore, the second surface 2S of the elastic member 1000 may be a surface of the second layer 1200 in the first region 1A, and may also be a surface of the first layer 1100 in the second region 2A.

[0101] Reference Figure 7 and Figure 8 The first patterned part PA1 may be formed on the first surface 1S of the elastic member 1000, but may not be formed on the second surface 2S of the elastic member 1000.

[0102] Specifically, refer to Figure 7The first patterned portion PA1 can be formed into a groove shape by partially etching the second layer 1200. Therefore, the patterned portion may not be provided on the second surface 2S of the elastic member 1000.

[0103] Or, refer to Figure 8 The first patterned portion PA1 can be formed as a hole through the second layer 1200. Therefore, multiple patterned portions can be provided on the second surface 2S of the elastic member 1000.

[0104] At least one of the first pattern portion PA1 and the second pattern portion PA2 may have a curved surface. For example, at least one of the first pattern portion PA1 and the second pattern portion PA2 may be formed into a shape with a curved surface, such as an ellipse, a hemisphere, or a circle.

[0105] Meanwhile, the elastic member 1000 may include a first protrusion P1. Specifically, the first protrusion P1 may be disposed at the edge of the elastic member 1000. Specifically, the first protrusion P1 may be disposed at the end of the elastic member 1000.

[0106] During the manufacturing process of the elastic member 1000, a first protrusion P1 may be formed. Specifically, when manufacturing multiple elastic members 1000, a first protrusion P1 may be formed during the manufacturing process of each elastic member 1000. For example, when multiple elastic members are formed to be spaced apart from each other on a large area metal substrate, a first protrusion P1 may be formed on the cut surface of the elastic member by cutting each elastic member to manufacture an elastic member.

[0107] The first protrusion P1 can be disposed in the second region 2A. That is, the first protrusion P1 can be disposed in the unfolded region of the elastic member. In other words, the first protrusion P1 can be disposed on the side surface LS of the elastic member 1000 surrounding the second region 2A of the elastic member 1000.

[0108] At least one first protrusion P1 may be provided on the side surface LS of the elastic member 1000. For example, the first protrusion P1 may include a plurality of first protrusions P1 provided on the side surface LS of the elastic member 1000 and spaced apart from each other.

[0109] Furthermore, the elastic member 1000 may further include a second protrusion P2.

[0110] The second protrusion P2 may be provided on the side surface LS of the elastic member 1000. For example, the second protrusion P2 may be provided on at least one of the two side surfaces of the elastic member 1000 along the first direction 1D and on both sides of the elastic member 1000 along the second direction 2D.

[0111] The second protrusion P2 can be integrally formed with the elastic member 1000.

[0112] Furthermore, the width of the second protrusion P2 can be varied from the inner side to the outer side of the elastic member 1000. Specifically, the width of the second protrusion P2 can decrease as it moves away from the side surface 1S of the elastic member 1000.

[0113] The size of the second protrusion P2 can be larger than the size of the first protrusion P1.

[0114] The first protrusion P1 mentioned above may not be formed on the second protrusion P2. Specifically, the second protrusion P2 and the first protrusion P1 may be spaced apart from each other. That is, on the side surface of the elastic member 1000 where the second protrusion P2 is formed, the first protrusion P1 may only be provided in areas other than the area where the second protrusion P2 is provided.

[0115] Therefore, it is possible to prevent the second protrusion P2 from deforming or being damaged due to the decrease in the strength of the first protrusion P1.

[0116] When the panel or circuit board is mounted on the elastic member 1000, the second protrusion P2 can be positioned at a location corresponding to or aligned with the joint of the panel or circuit board.

[0117] Therefore, the panel, etc., can be easily set on the elastic member 1000, and the alignment distortion can be minimized by the second protrusion P2.

[0118] Figure 9 and Figure 10 This is a cross-sectional view showing the elastic member according to the first embodiment.

[0119] Reference Figure 9 and Figure 10 The elastic member according to the first embodiment may include a first layer 1100 and a second layer 1200 on the first layer 1100.

[0120] The area of ​​the first layer 1100 may be smaller than the area of ​​the second layer 1200. Specifically, the first layer 1100 may be disposed only in the region corresponding to the second region 2A of the elastic member 1000. However, the embodiments are not limited to this, and the first layer 1100 may also be disposed on a portion of the first region 1A.

[0121] The first layer 1100 is not provided in the folding area or is provided in a part of the folding area. Therefore, when the elastic member is folded, it can prevent the increase of stress due to the increase of the thickness of the first region 1A, thereby improving the folding characteristics of the elastic member.

[0122] The adhesive layer 100 can be disposed between the first layer 1100 and the second layer 1200, and the first layer 1100 and the second layer 1200 can be bonded to each other through the adhesive layer 100.

[0123] Although the accompanying drawings show that the adhesive layer 100 is disposed only at the location where the first layer 1100 and the second layer 1200 overlap (i.e., in the second region 2A), the embodiments are not limited thereto, and the adhesive layer 100 may be disposed in both the first region 1A and the second region 2A.

[0124] The adhesive layer 100 may include a pressure-sensitive adhesive (PSA). Furthermore, metal particles may be dispersed and disposed within the adhesive layer 100. Therefore, the thermal conductivity of the adhesive layer 100 can be increased by the metal particles, thereby improving the heat dissipation characteristics of the elastic member.

[0125] The first layer 1100 and the second layer 1200 can be formed to have different thicknesses. For example, the thickness of the second layer 1200 can be greater than the thickness of the first layer 1100.

[0126] The thickness T2 of the second 1200 layer can be 90 μm or more. Specifically, the thickness T2 of the second 1200 layer can be from 90 μm to 200 μm. More specifically, the thickness T2 of the second 1200 layer can be from 120 μm to 170 μm.

[0127] When the thickness T2 of the second layer 1200 is less than 90μm, the supporting strength of the elastic member 1000 decreases, making it difficult for the elastic member 1000 to support other panels, and when the member 1000 is folded, the elastic force of the elastic member may be reduced.

[0128] Furthermore, when the thickness T2 of the second layer 1200 exceeds 200 μm, the folding characteristics may deteriorate. For example, due to the stress on the elastic member 1000, plastic deformation may occur when the elastic member is folded. In addition, this will increase the overall thickness of the display device using the elastic member.

[0129] Reference Figure 9 and Figure 10 The aforementioned patterned portion can be disposed on the elastic member 1000. Specifically, multiple patterned portions can be disposed on the second layer 1200 of the elastic member 1000.

[0130] Specifically, the second layer 1200 of the elastic member 1000 may include a plurality of patterned portions disposed on at least one of the first region 1A and the second region 2A.

[0131] For example, refer to Figure 9 The first pattern portion PA1 and the second pattern portion PA2, which are formed to pass through the second layer 1200, can be disposed in the first region 1A and the second region 2A of the second layer 1200.

[0132] Or, refer to Figure 10 The first pattern part PA1 may be provided only in the first region 1A of the second layer 1200, and the pattern part may not be provided in the second region 2A.

[0133] The first layer 1100 and the second layer 1200 may contain metal. Specifically, the first layer 1100 and the second layer 1200 may contain different types of metal.

[0134] For example, the first layer 1100 and the second layer 1200 may contain materials with different thermal conductivity. Specifically, the thermal conductivity of the first layer 1100 may be greater than that of the second layer 1200. Specifically, the first layer 1100 may contain a metal with a thermal conductivity of about 20 W / mK or higher.

[0135] In other words, the first layer 1100 can be disposed below the second layer 1200 to dissipate heat flowing into the elastic member 1000 to the outside. That is, the first layer 1100 can be used as a heat dissipation layer in the elastic member 1000.

[0136] The thickness T1 of the first layer 1100 can be less than 100 μm. Specifically, the thickness T1 of the first layer 1100 can be from 30 μm to 100 μm. More specifically, the thickness T1 of the first layer 1100 can be from 45 μm to 85 μm.

[0137] When the thickness T1 of the first layer 1100 exceeds 100 μm, the total stress of the elastic member may increase due to the thickness of the first layer, thus the folding characteristics of the elastic member may deteriorate. In addition, when the thickness T1 of the first layer 1100 is less than 30 μm, the first layer may not have sufficient thermal conductivity, thus the elastic member may deform due to heat.

[0138] The elastic member according to the first embodiment may include multiple layers.

[0139] Specifically, the elastic member according to the first embodiment may include a first layer having high thermal conductivity. Therefore, the elastic member according to the first embodiment can increase the overall thermal conductivity of the elastic member through the first layer.

[0140] Therefore, when elastic components are applied to display devices, the heat transferred from the display panel can be effectively dissipated to the outside.

[0141] Therefore, by preventing the elastic member from deforming due to heat, the elasticity and strength of the elastic member can be maintained, thus preserving the folding properties of the elastic member.

[0142] In the following text, reference will be made to Figures 11 to 15A second embodiment of the elastic member is described. In the description of the elastic member according to the second embodiment, descriptions of configurations identical or similar to those of the elastic member according to the first embodiment described above will be omitted. Furthermore, in the description of the elastic member according to the second embodiment, the same reference numerals are assigned to configurations identical or similar to those of the elastic member according to the first embodiment. Moreover, the elastic member according to the second embodiment can be implemented independently or in combination with the elastic member according to the first embodiment described above.

[0143] Figure 11 and Figure 12 This is a top view of the elastic member according to the second embodiment. Figure 11 This is a top view of the first surface of the elastic member according to the second embodiment, and Figure 12 This is a top view of the second surface of the elastic member according to the second embodiment.

[0144] Reference Figure 11 and Figure 12 The elastic member 1000 according to the second embodiment may include a plurality of patterned portions. Specifically, in the elastic member 1000 according to the second embodiment, unlike the elastic member according to the first embodiment described above, the plurality of patterned portions may be formed in the first layer 1100 of the elastic member.

[0145] Reference Figure 11 According to the second embodiment, the first surface 1S of the elastic member 1000 can be a surface of the second layer 1200 in the layers of the elastic member. The patterned portion may not be provided on the second layer 1200.

[0146] In addition, refer to Figure 12 According to the second embodiment, the second surface 2S of the elastic member 1000 can be a surface of the first layer 1100 in the layers of the elastic member. The patterned portion can be provided on the first layer 1100.

[0147] In other words, multiple patterned portions can be disposed on a second surface 2S of a surface of the first layer 1100 defined as the elastic member 1000. Specifically, multiple patterned portions disposed in at least one of the first region 1A and the second region 2A can be disposed on a second surface 2S of a surface of the first layer 1100 defined as the elastic member 1000. For example, a first patterned portion PA1 disposed in the first region 1A and a second patterned portion PA2 disposed in the second region 2A can be included in a second surface 2S of a surface of the first layer 1100 defined as the elastic member 1000.

[0148] At least one of the first pattern portion PA1 and the second pattern portion PA2 can be formed by partially or completely etching the first layer 1100. That is, at least one of the first pattern portion PA1 and the second pattern portion PA2 can be a hole or groove formed in the first layer 1100.

[0149] The dimensions, positions, etc. of the first pattern part PA1 and the second pattern part PA2 are the same as or similar to those described in the description of the first pattern part PA1 and the second pattern part PA2 according to the first embodiment described above, and therefore this description will be omitted below.

[0150] Figures 13 to 15 This is a cross-sectional view of the elastic member according to the second embodiment.

[0151] Reference Figures 13 to 15 According to the second embodiment, the elastic member 1000 may include a first layer 1100 and a second layer 1200. Specifically, the elastic member 1000 may include a first layer 1100 and a second layer 1200 disposed on the first layer 1100.

[0152] The first layer 1100 and the second layer 1200 can be configured to be in contact with each other. That is, the upper surface of the first layer 1100 and the lower surface of the second layer 1200 can be configured to be in direct contact with each other.

[0153] The first layer 1100 and the second layer 1200 can be manufactured to be in direct contact with each other using an encapsulation method.

[0154] Clad bonding is a method of joining the first layer 1100 and the second layer 1200 without the use of adhesives, such as by welding, rolling, casting or extrusion. By disrupting the inter-layer structure and stabilizing the bond between the layers through gap penetration, it can exhibit better bonding strength over time.

[0155] For example, bonding can be formed by inducing atomic diffusion between different materials at the interface of different layers through rolling. Since overlay bonding can handle curved surfaces (unlike bonding using adhesives) and uses atomic diffusion bonding (instead of bonding using adhesives), it has the advantage of being able to maintain the bond state for a long time.

[0156] For example, the first layer 1100 can use a layer with good thermal conductivity to improve heat dissipation characteristics, and the second layer 1200 can use a layer with good yield strength to bond the two layers together so that they can be well restored to the unfolded state as the initial state after folding without the use of adhesives. This improves the reduction in thickness and the bonding strength, enhances the overall folding reliability, and effectively reduces the heat generated from the display.

[0157] In other words, the first layer 1100 and the second layer 1200 can be in direct contact with each other, and a diffusion section D of the two layers of the element can be formed at the interface between the first layer 1100 and the second layer 1200.

[0158] The first layer 1100 and the second layer 1200 may contain metal. For example, the first layer 1100 and the second layer 1200 may contain different types of metal.

[0159] The thermal conductivity of the first layer 1100 and the thermal conductivity of the second layer 1200 can be different from each other. Specifically, the thermal conductivity of the first layer 1100 can be greater than that of the second layer 1200. Therefore, compared with the second layer 1200, the first layer 1100 can have improved heat dissipation characteristics.

[0160] The first layer 1100 can have a thermal conductivity of approximately 20 W / mK or higher. That is, the first layer 1100 can contain a metal with a thermal conductivity of 20 W / mK or higher. Furthermore, the second layer 1200 can contain a metal with a thermal conductivity of less than 20 W / mK.

[0161] Specifically, the first layer 1100 can have a thermal conductivity of 30 W / mK to 200 W / mK. More specifically, the first layer 1100 can have a thermal conductivity of 50 W / mK to 160 W / mK. Even more specifically, the first layer 1100 can have a thermal conductivity of 80 W / mK to 120 W / mK.

[0162] When the thermal conductivity of the first layer 1100 is less than 20 W / mK, the heat of the elastic component may not be effectively dissipated to the outside. Furthermore, when the thermal conductivity of the first layer 1100 exceeds 200 W / mK, the thickness of the first layer 1100 may be increased to increase its thermal conductivity, and due to the increase in thermal conductivity, the heat dissipation efficiency may become negligible.

[0163] Furthermore, the yield strength of the first layer 1100 and the yield strength of the second layer 1200 can be different from each other. Specifically, the yield strength of the second layer 1200 can be greater than the yield strength of the first layer 1100. Therefore, the strain rate of the second layer 1200 can be less than the strain rate of the first layer 1100.

[0164] The yield strength of the second layer 1200 can be approximately 0.7 GPa or higher. That is, the second layer 1200 can contain a metal with a yield strength of approximately 0.7 GPa or higher. Furthermore, the first layer 1100 can contain a metal with a yield strength less than approximately 0.7 GPa.

[0165] Specifically, the yield strength of the second 1200 layer can be 0.8 GPa or higher. More specifically, the yield strength of the second 1200 layer can be 0.9 GPa or higher. Even more specifically, the yield strength of the second 1200 layer can be 1.0 GPa or higher.

[0166] When the yield strength of the second layer (1200) is less than 0.7 GPa, the strength of the elastic member decreases when it is folded. Therefore, plastic deformation may occur in the elastic member during the folding and recovery processes.

[0167] For example, the first layer 1100 may contain copper (Cu) and the second layer 1200 may contain SUS, but the embodiments are not limited thereto, and the first layer 1100 and the second layer 1200 may contain various metals that meet the requirements of thermal conductivity and yield strength.

[0168] The first layer 1100 and the second layer 1200 can have different thicknesses. Specifically, the thickness T1 of the first layer 1100 can be greater than the thickness T2 of the second layer 1200.

[0169] For example, the thickness T1 of the first layer 1100 can be 60% to 90% of the total thickness T1+T2 of the elastic member 1000.

[0170] As an example, the thickness T1 of the first layer 1100 can be less than 150 μm. Specifically, the thickness T1 of the first layer 1100 can be between 80 μm and 150 μm.

[0171] When the thickness T1 of the first layer 1100 is less than 60% of the total thickness of the elastic member 1000, the overall heat dissipation characteristics of the elastic member 1000 may deteriorate. In addition, when the thickness T1 of the first layer 1100 exceeds 90% of the total thickness of the elastic member 1000, the total yield strength of the elastic member decreases, and plastic deformation may occur in the elastic member during the folding or recovery process.

[0172] Furthermore, the thickness T2 of the second layer 1200 can be 10% to 40% of the total thickness of the elastic member 1000.

[0173] As an example, the thickness T2 of the second layer 1200 can be less than 50 μm. Specifically, the thickness T2 of the second layer 1200 can be between 10 μm and 50 μm.

[0174] When the thickness T2 of the second layer 1200 is less than 10% of the total thickness of the elastic member 1000, the total yield strength of the elastic member 1000 decreases, thus plastic deformation may occur in the elastic member during the folding or recovery process. Furthermore, when the thickness T2 of the second layer 1200 exceeds 40% of the total thickness of the elastic member 1000, the overall heat dissipation characteristics of the elastic member 1000 deteriorate. Therefore, when the elastic member is used in a display device, an additional heat dissipation layer may be required, and deformation of the elastic member 1000 due to heat may occur.

[0175] At least one of the first pattern portion PA1 and the second pattern portion PA2, which includes multiple holes or multiple grooves, can be formed in at least one of the first layer 1100 and the second layer 1200. Specifically, at least one of the first pattern portion PA1 and the second pattern portion PA2 can be disposed on the first layer 1100.

[0176] In other words, the first patterned part PA1 can be configured on the first layer 1100 to correspond to the first region 1A of the elastic member 1000, and the second patterned part PA2 can be configured on the first layer 1100 to correspond to the second region 2A.

[0177] Reference Figure 13 The first patterned portion PA1 and the second patterned portion PA2 can be formed by partially etching the elastic member 1000. Specifically, the first patterned portion PA1 and the second patterned portion PA2 can open from the first surface 1S of the elastic member 1000 and can extend along the direction of the second surface 2S. More specifically, the first patterned portion PA1 and the second patterned portion PA2 can open in the first layer 1100 of the elastic member 1000 and can extend along the direction of the second layer 1200.

[0178] The first patterned portion PA1 and the second patterned portion PA2 can be formed by partially etching the first layer 1100. For example, the bottom surface of the first patterned portion PA1 and the bottom surface of the second patterned portion PA2 can be spaced apart from the interface between the first layer 1100 and the second layer 1200 by a predetermined distance d.

[0179] Because a first patterned portion PA1 and a second patterned portion PA2 are formed on the first layer 1100, the elastic member 1000 can have improved heat dissipation characteristics and folding reliability.

[0180] In other words, since the first patterned portion PA1 and the second patterned portion PA2 are formed on the first layer 1100, which has a lower yield strength compared to the second layer 1200, the second layer 1200, which has a high yield strength, can minimize the plastic deformation of the elastic member when it is folded.

[0181] Furthermore, the heat dissipation characteristics of the elastic member 1000 can be improved by forming a first layer 1100 with a relatively thicker thickness compared to the second layer 1200, and the stress of the elastic member can be reduced by the first pattern portion and the second pattern portion provided on the first layer 1100, so the elastic member can be easily folded.

[0182] Furthermore, when an additional panel is mounted or joined on the elastic member, since the panel is mounted on a second layer on which no pattern is formed, an additional planarization layer is not required, thus reducing the overall thickness of the display device, including the elastic member and the panel.

[0183] At the same time, refer to Figure 14 The first pattern portion PA1 and the second pattern portion PA2 can be formed by completely etching the first layer 1100. That is, the first pattern portion PA1 and the second pattern portion PA2 can be formed to extend through the first layer 1100. In other words, the first pattern portion PA1 and the second pattern portion PA2 can be configured to extend to the interface between the first layer 1100 and the second layer 1200.

[0184] Therefore, the inner surface of the first patterned part PA1 and the inner surface of the second patterned part PA2, as well as the bottom surface of the first patterned part PA1 and the bottom surface of the second patterned part PA2, can contain different materials.

[0185] That is, the inner surface of the first patterned part PA1 and the inner surface of the second patterned part PA2 may contain the same material as the first layer 1100, and the bottom surface of the first patterned part PA1 and the bottom surface of the second patterned part PA2 may contain the same material as the second layer 1200 exposed through the first patterned part PA1 and the second patterned part PA2.

[0186] Or, refer to Figure 15 The first patterned portion PA1 and the second patterned portion PA2 can be formed by etching the first layer 1100 and the second layer 1200. Specifically, the first patterned portion PA1 and the second patterned portion PA2 can be completely etched from the first layer 1100 and partially etched from the second layer 1200.

[0187] Therefore, the first patterned portion PA1 and the second patterned portion PA2 can be formed in the first layer 1100 as a hole shape passing through the first layer 1100, and can be formed in the second layer 1200 as a groove shape partially formed on the second layer 1200.

[0188] Therefore, the bottom surface of the first patterned part PA1 and the bottom surface of the second patterned part PA2 can be the second layer 1200 exposed through the first patterned part PA1 and the second patterned part PA2.

[0189] Therefore, the inner surfaces of the first patterned portion PA1 and the second patterned portion PA2 can contain different materials depending on their depth. Specifically, a portion of the inner surfaces of the first patterned portion PA1 and the second patterned portion PA2 can contain the same material as the first layer 1100, and other portions of the inner surfaces of the first patterned portion PA1 and the second patterned portion PA2 can contain the same material as the second layer 1200.

[0190] Furthermore, the inner surfaces of the first patterned portion PA1 and the second patterned portion PA2 may contain the same or different materials as the bottom surfaces of the first patterned portion PA1 and the second patterned portion PA2.

[0191] In other words, a portion of the inner surface of the first patterned portion PA1 and a portion of the inner surface of the second patterned portion PA2 may contain a material different from the bottom surface of the first patterned portion PA1 and the second patterned portion PA2, and other portions of the inner surface of the first patterned portion PA1 and the second patterned portion PA2 may contain the same material as the bottom surface of the first patterned portion PA1 and the bottom surface of the second patterned portion PA2.

[0192] The elastic member according to the second embodiment may include multiple layers.

[0193] Specifically, the elastic member according to the second embodiment may include a first layer and a second layer with different strengths and thermal conductivity properties.

[0194] Furthermore, the patterned portion of the elastic component can be disposed on the first layer, which has a relatively large thickness and thermal conductivity.

[0195] Therefore, in the elastic member according to the second embodiment, the first layer having high thermal conductivity can improve the heat dissipation characteristics of the elastic member. Furthermore, the compressive stress of the elastic member can be reduced by providing multiple patterned portions on the first layer, thereby improving the folding characteristics of the elastic member.

[0196] Furthermore, by providing patterned portions in the first layer and not forming additional patterned portions in the second layer, the second layer, which has relatively high strength, can maintain the strength of the elastic member.

[0197] Furthermore, since the first and second layers are bonded to each other by direct contact through an encapsulation method, the thickness of the elastic member can be reduced, and the bonding properties of the first and second layers can be improved.

[0198] Therefore, the elastic member according to the second embodiment can have improved heat dissipation characteristics, strength, folding characteristics, and reliability.

[0199] In the following text, reference will be made to Figure 16 and Figure 17A third embodiment of the elastic member is described. In the description of the elastic member according to the third embodiment, descriptions of configurations identical or similar to those of the elastic member according to the second embodiment described above will be omitted. Furthermore, in the description of the elastic member according to the third embodiment, the same reference numerals are assigned to configurations identical or similar to those of the elastic member according to the second embodiment. Moreover, the elastic member according to the third embodiment can be implemented independently or in combination with the elastic members according to the first and / or second embodiments described above.

[0200] Reference Figure 16 and Figure 17 The elastic member 1000 may further include an adhesive layer 100. Specifically, the elastic member 1000 may further include an adhesive layer 100 disposed between the first layer 1100 and the second layer 1200.

[0201] An adhesive layer may be disposed between the first layer 1100 and the second layer 1200 to bond the first layer 1100 and the second layer 1200.

[0202] The thickness T4 of the adhesive layer 100 may be different from the thickness T1 of the first layer 1100 and the thickness T2 of the second layer. Specifically, the thickness T4 of the adhesive layer 100 may be less than the thickness T1 of the first layer 1100. In addition, the thickness T4 of the adhesive layer 100 may be the same as or greater than the thickness of the second layer 1200.

[0203] The adhesive layer 100 may comprise a resin material. Specifically, the adhesive layer 100 may comprise a resin material including metal. For example, the adhesive layer 100 may comprise a pressure-sensitive adhesive (PSA) including metal particles. For example, the adhesive layer 100 may comprise copper.

[0204] Because the adhesive layer 100 contains metal particles, the heat dissipation effect of the elastic component can be improved. In other words, the elastic component can improve the thermal conductivity of the adhesive layer through the metal particles, thereby achieving a heat dissipation effect through the adhesive layer.

[0205] Furthermore, the adhesive layer 100 can enhance the bonding strength between the first layer 1100 and the second layer 1200. In other words, by providing the adhesive layer 100 between the first layer 1100 and the second layer 1200, which contain different metallic materials, the bonding between the first layer 1100 and the second layer 1200 can be promoted.

[0206] Furthermore, by using an adhesive layer to prevent the material of the second layer from moving into the material of the first layer and alloying during high-temperature processes, the heat dissipation characteristics of the first layer can be prevented from deteriorating.

[0207] In the following text, reference will be made to Figures 18 to 22A resilient member according to a fourth embodiment is described. In the description of the resilient member according to the fourth embodiment, descriptions of configurations identical or similar to those of the resilient members according to the second and third embodiments described above will be omitted. Furthermore, in the description of the resilient member according to the fourth embodiment, the same reference numerals are assigned to configurations identical or similar to those of the resilient members according to the second and third embodiments. Moreover, the resilient member according to the fourth embodiment can be implemented independently or in combination with resilient members according to at least one of the first, second, and third embodiments described above.

[0208] Figure 18 and Figure 19 This is a top view of the elastic member according to the fourth embodiment. Figure 18 This is a top view of the first surface of the elastic member according to the fourth embodiment, and Figure 19 This is a top view of the second surface of the elastic member according to the fourth embodiment.

[0209] Reference Figure 18 and Figure 19 The elastic member 1000 according to the fourth embodiment may include a plurality of patterned portions. Specifically, in the elastic member 1000 according to the fourth embodiment, unlike the elastic members according to the second and third embodiments described above, a plurality of patterned portions may be formed in the first layer 1100 and the third layer 1300 of the elastic member.

[0210] That is, the elastic member according to the fourth embodiment may include a first layer 1100, a second layer 1200 on the first layer 1100 and a third layer 1300 on the second layer 1200, and a plurality of patterned portions may be disposed on the first layer 1100 and the third layer 1300.

[0211] For example, multiple patterned portions may be provided on a second surface 2S of a surface of a first layer 1100 defined as elastic member 1000. Furthermore, multiple patterned portions may be provided on a first surface 1S of a surface of a third layer 1300 defined as elastic member 1000.

[0212] Specifically, multiple pattern portions provided in at least one of the first pattern portion PA1 and the second pattern portion PA2 can be provided on a second surface 2S of a surface of the first layer 1100 defined as the elastic member 1000. For example, the second surface 2S of a surface of the first layer 1100 defined as the elastic member 1000 may include a first pattern portion PA1-1 provided in the first region 1A and a second pattern portion PA2-1 provided in the second region 2A.

[0213] Furthermore, multiple pattern portions provided in at least one of the first pattern portion PA1 and the second pattern portion PA2 may be provided on a first surface 1S of a surface of the third layer 1300 defined as the elastic member 1000. For example, the first surface 1S of the third layer 1300 defined as the elastic member 1000 may include a third pattern portion PA1-2 provided in the first region 1A and a fourth pattern portion PA2-2 provided in the second region 2A.

[0214] In other words, unlike the elastic members according to the second and third embodiments, in the elastic member according to the fourth embodiment, the pattern portion can be provided on both the first surface 1S and the second surface 2S of the elastic member 1000.

[0215] The first pattern portion PA1-1 and the third pattern portion PA1-2, respectively disposed on the first layer 1100 and the third layer 1300 of the first region 1A, can be disposed at corresponding positions. Specifically, the first pattern portion PA1-1 and the third pattern portion PA1-2 disposed in the first region 1A can be disposed at positions where they overlap along the thickness direction of the elastic member 1000. For example, the first pattern portion PA1-1 and the third pattern portion PA1-2 disposed in the first region 1A can be disposed at positions where they completely overlap or partially overlap along the thickness direction of the elastic member 1000.

[0216] Alternatively, the first pattern portion PA1-1 and the third pattern portion PA1-2, respectively provided on the first layer 1100 and the third layer 1300 of the first region 1A, can be provided at positions that are staggered from each other. That is, the first pattern portion PA1-1 and the third pattern portion PA1-2, respectively provided on the first layer 1100 and the third layer 1300 of the first region 1A, can be provided at positions that do not overlap along the thickness direction of the elastic member 1000.

[0217] Furthermore, the first pattern portion PA1-1 and the third pattern portion PA1-2, respectively provided on the first layer 1100 and the third layer 1300 of the first region 1A, can be formed to have the same or similar dimensions. Specifically, the dimensions and / or depths of the opening areas of the inner regions of the first pattern portion PA1-1 and the third pattern portion PA1-2, respectively provided on the first layer 1100 and the third layer 1300 of the first region 1A, can have the same or similar dimensions.

[0218] Therefore, by minimizing the stress non-uniformity between the first layer 1100 and the second layer 1300 of the elastic member 1000, the plastic deformation caused by stress when the elastic member 1000 is folded can be minimized.

[0219] Furthermore, the first pattern portion PA1-1 and the third pattern portion PA1-2 may not be connected to each other. That is, the first pattern portion PA1-1 and the third pattern portion PA1-2 may be defined as grooves provided in the elastic member 1000, and the first pattern portion PA1-1 and the third pattern portion PA1-2 may not be connected to each other. In other words, the first pattern portion PA1-1 and the third pattern portion PA1-2 can be separated from each other through the second layer 1200 provided between the first layer 1100 and the third layer 1300.

[0220] The second pattern portion PA2-1 and the fourth pattern portion PA2-2, respectively disposed on the first layer 1100 and the third layer 1300 of the second region 2A, can be disposed at corresponding positions. Specifically, the second pattern portion PA2-1 and the fourth pattern portion PA2-2 disposed in the second region 2A can be disposed at positions where they overlap along the thickness direction of the elastic member 1000. For example, the second pattern portion PA2-1 and the fourth pattern portion PA2-2 disposed in the second region 2A can be disposed at positions where they completely overlap or partially overlap along the thickness direction of the elastic member 1000.

[0221] Alternatively, the second pattern portion PA2-1 and the fourth pattern portion PA2-2, respectively provided on the first layer 1100 and the third layer 1300 of the second region 2A, can be provided at positions offset from each other. That is, the second pattern portion PA2-1 and the fourth pattern portion PA2-2, respectively provided on the first layer 1100 and the third layer 1300 of the second region 2A, can be provided at positions that do not overlap along the thickness direction of the elastic member 1000.

[0222] Furthermore, the second pattern portion PA2-1 and the fourth pattern portion PA2-2, respectively provided on the first layer 1100 and the third layer 1300 of the second region 2A, can be formed to have the same or similar dimensions. Specifically, the dimensions and / or dimensions and / or depths of the opening areas of the inner regions of the second pattern portion PA2-1 and the fourth pattern portion PA2-2, respectively provided on the first layer 1100 and the third layer 1300 of the second region 2A, can have the same or similar dimensions.

[0223] Therefore, by minimizing the stress non-uniformity between the first layer 1100 and the second layer 1300 of the elastic member 1000, the plastic deformation caused by stress when the elastic member 1000 is folded can be minimized.

[0224] Furthermore, the second patterned portion PA2-1 and the fourth patterned portion PA2-2 may not be connected to each other. That is, the second patterned portion PA2-1 and the fourth patterned portion PA2-2 may be defined as grooves provided in the elastic member 1000, and the second patterned portion PA2-1 and the fourth patterned portion PA2-2 may not be connected to each other. In other words, the second patterned portion PA2-1 and the fourth patterned portion PA2-2 can be separated from each other through the second layer 1200 provided between the first layer 1100 and the third layer 1300.

[0225] Figures 20 to 22 This is a cross-sectional view of the elastic member according to the fourth embodiment.

[0226] Reference Figures 20 to 22 The elastic member 1000 may include a first layer 1100, a second layer 1200, and a third layer 1300. Specifically, the elastic member 1000 may include a first layer 1100, a second layer 1200 disposed on the first layer 1100, and a third layer 1300 disposed on the second layer 1200.

[0227] The first layer 1100, the second layer 1200, and the third layer 1300 can be bonded to each other. For example, the first layer 1100, the second layer 1200, and the third layer 1300 can be bonded together without the use of additional adhesives by the above-described encapsulation method.

[0228] In other words, the first layer 1100, the second layer 1200, and the third layer 1300 can be in direct contact with each other and can be bonded to each other.

[0229] Alternatively, the first layer 1100, the second layer 1200, and the third layer 1300 can be bonded together with an adhesive. Specifically, the adhesive layer can be disposed at at least one of the first layer 1100 and the second layer 1200, and the second layer 1200 and the third layer 1300. Thus, the first layer 1100, the second layer 1200, and the third layer 1300 can be bonded together.

[0230] In other words, unlike the above embodiments, the elastic member according to the fourth embodiment may further include a third layer disposed on the second layer.

[0231] The first layer 1100 and the second layer 1200 can be configured to be in contact with each other. That is, the upper surface of the first layer 1100 and the lower surface of the second layer 1200 can be configured to be in direct contact with each other.

[0232] Furthermore, the second layer 1200 and the third layer 1300 can be configured to be in contact with each other. That is, the upper surface of the second layer 1200 and the lower surface of the third layer 1300 can be configured to be in direct contact with each other.

[0233] In other words, the second layer 1200 can be set between the first layer 1100 and the third layer 1300, and can be in direct contact with the first layer 1100 and the third layer 1300.

[0234] The first layer 1100, the second layer 1200, and the third layer 1300 may contain metal. For example, the first layer 1100, the second layer 1200, and the third layer 1300 may contain different types of metal. Specifically, at least one of the first layer 1100, the second layer 1200, and the third layer 1300 may contain a metal different from the other layers.

[0235] Specifically, the first layer 1100 and the third layer 1300 may contain the same or similar metals. Alternatively, the first layer 1100 and the third layer 1300 may contain metals having the same or similar chemical / physical properties.

[0236] For example, the thermal conductivity of the first layer 1100 and the thermal conductivity of the third layer 1300 can be the same or similar to each other. Furthermore, the yield strength of the first layer 1100 and the yield strength of the third layer 1300 can be the same or similar to each other.

[0237] Furthermore, the first layer 1100 and the third layer 1300 may contain metals different from those in the second layer 1200. Alternatively, the first layer 1100 and the third layer 1300 may contain metals with different chemical / physical properties than those in the second layer 1200.

[0238] For example, at least one of the thermal conductivity of the first layer 1100 and the thermal conductivity of the third layer 1300 may be greater than the thermal conductivity of the second layer 1200. Therefore, compared with the second layer 1200, at least one of the first layer 1100 and the third layer 1300 may have improved heat dissipation characteristics.

[0239] Furthermore, at least one of the yield strength of the first layer 1100 and the yield strength of the third layer 1300 may be less than the yield strength of the second layer 1200. Therefore, the strain rate of the second layer 1200 may be less than the strain rate of at least one of the first layer 1100 and the third layer 1300.

[0240] In other words, the range of thermal conductivity and yield strength of the second layer 1200 and the third layer 1300 can be the same as or similar to the range of thermal conductivity and yield strength of the first layer 1100 and the second layer 1200.

[0241] For example, the first layer 1100 and the third layer 1300 may contain copper (Cu), and the second layer 1200 may contain SUS.

[0242] The first layer 1100, the second layer 1200, and the third layer 1300 can have different thicknesses. Specifically, the thickness T1 of the first layer 1100 and the thickness T3 of the third layer 1300 can be greater than the thickness T2 of the second layer 1200.

[0243] For example, the thickness T1 of the first layer 1100 can be 30% to 40% of the total thickness T1+T2+T3 of the elastic member 1000.

[0244] In addition, the thickness T3 of the third layer 1300 can be 30% to 40% of the total thickness T1+T2+T3 of the elastic member 1000.

[0245] As an example, the thickness T1 of the first layer 1100 and the thickness T3 of the third layer 1300 can be less than 75 μm. Specifically, the thickness T1 of the first layer 1100 and the thickness T3 of the third layer 1300 can be between 40 μm and 75 μm.

[0246] When the thickness T1 of the first layer 1100 and the thickness T3 of the third layer 1300 are less than 30% of the total thickness of the elastic member 1000, the overall heat dissipation characteristics of the elastic member 1000 may deteriorate. Furthermore, when the thickness T1 of the first layer 1100 and the thickness T3 of the third layer 1300 exceed 40% of the total thickness of the elastic member 1000, the total yield strength of the elastic member decreases, and plastic deformation may occur within the elastic member during folding or recovery processes.

[0247] Furthermore, the thickness T2 of the second layer 1200 can be 10% to 20% of the total thickness of the elastic member 1000.

[0248] As an example, the thickness T2 of the second layer 1200 can be less than 50 μm. Specifically, the thickness T2 of the second layer 1200 can be between 10 μm and 50 μm.

[0249] When the thickness T2 of the second layer 1200 is less than 10% of the total thickness of the elastic member 1000, the total yield strength of the elastic member 1000 decreases, thus plastic deformation may occur in the elastic member during the folding or recovery process. Furthermore, when the thickness T2 of the second layer 1200 exceeds 20% of the total thickness of the elastic member 1000, the overall heat dissipation characteristics of the elastic member 1000 deteriorate. Therefore, when the elastic member is used in a display device, an additional heat dissipation layer may be required, and deformation of the elastic member 1000 due to heat may occur.

[0250] The aforementioned pattern portion can be formed in at least one of the first layer 1100, the second layer 1200, and the third layer 1300. Specifically, the pattern portion can be disposed on the first layer 1100 and the third layer 1300.

[0251] In other words, the first pattern part PA1-1 can be configured on the first layer 1100 to correspond to the first region 1A of the elastic member 1000, and the third pattern part PA1-2 can be configured on the third layer 1300 to correspond to the first region 1A of the elastic member 1000.

[0252] Furthermore, the second patterned part PA2-1 may be configured on the first layer 1100 to correspond to the second region 2A of the elastic member 1000, and the fourth patterned part PA2-2 may be configured on the third layer 1300 to correspond to the second region 2A of the elastic member 1000.

[0253] Reference Figure 20 The first pattern portion PA1-1, the third pattern portion PA1-2, the second pattern portion PA2-1, and the fourth pattern portion PA2-2 can be formed by locally etching the elastic member 1000. For example, the bottom surfaces of the first pattern portion PA1-1 and the second pattern portion PA2-1 can be formed to be spaced apart from the interface between the first layer and the second layer by a predetermined distance, and the bottom surfaces of the third pattern portion PA1-2 and the fourth pattern portion PA2-2 can be formed to be spaced apart from the interface between the second layer and the third layer by a predetermined distance.

[0254] Specifically, the first patterned portion PA1-1 and the second patterned portion PA2-1 can be opened on the first surface 1S of the elastic member 1000 to extend toward the second surface 2S.

[0255] Furthermore, the third patterned portion PA1-2 and the fourth patterned portion PA2-2 may have openings on the second surface 2S of the elastic member 1000 to extend toward the first surface 1S.

[0256] Specifically, the first patterned portion PA1-1 and the second patterned portion PA2-1 can be formed by partially etching the first layer 1100. For example, the bottom surface of the first patterned portion PA1-1 and the bottom surface of the second patterned portion PA2-1 can be formed to be spaced apart from the interface between the first layer 1100 and the second layer 1200.

[0257] Furthermore, the third pattern portion PA1-2 and the fourth pattern portion PA2-2 can be formed by partially etching the third layer 1300. For example, the bottom surface of the third pattern portion PA1-2 and the bottom surface of the fourth pattern portion PA2-2 can be formed to be spaced apart from the interface between the third layer 1300 and the second layer 1200.

[0258] Therefore, the first pattern part PA1-1, the second pattern part PA2-1, the third pattern part PA1-2, and the fourth pattern part PA2-2 are not connected to each other, and can be respectively disposed on the first layer 1100 and the third layer 1300.

[0259] Because patterned portions are formed on the first layer 1100 and the third layer 1300, the elastic member 1000 can have improved heat dissipation characteristics and folding reliability.

[0260] In other words, since patterned portions are formed in the first layer 1100 and the third layer 1300, which have lower yield strength, the second layer 1200, which has higher yield strength, can minimize the plastic deformation of the elastic member when it is folded.

[0261] Furthermore, the heat dissipation characteristics of the elastic member 1000 can be improved by forming a second layer 1200 with a relatively thicker thickness compared to the first layer 1100 and the third layer 1300, and the stress of the elastic member can be reduced by the patterned portions provided on the first layer 1100 and the third layer 1300, so the elastic member can be easily folded.

[0262] Furthermore, since patterned portions are formed on both the first surface 1S and the second surface 2S of the elastic member 1000, the stress difference between the first surface 1S and the second surface 2S can be minimized. Therefore, when the elastic member is bent in the direction facing the first surface or in the direction facing the second surface, similar folding reliability can be achieved, thereby improving the degree of freedom of folding.

[0263] At the same time, refer to Figure 21 The first pattern portion PA1-1, the third pattern portion PA1-2, the second pattern portion PA2-1, and the fourth pattern portion PA2-2 can be formed by completely etching the first layer 1100 and the third layer 1300. That is, the first pattern portion PA1-1 and the second pattern portion PA2-1 can be formed to pass through the first layer 1100, and the third pattern portion PA1-2 and the fourth pattern portion PA2-2 can be formed to pass through the third layer 1300.

[0264] That is, the first pattern part PA1-1 and the second pattern part PA2-1 can be configured to extend to the interface between the first layer 1100 and the second layer 1200, and the third pattern part PA1-2 and the fourth pattern part PA2-2 can be configured to extend to the interface between the third layer 1300 and the second layer 1200.

[0265] Therefore, the inner surfaces of the first patterned portion PA1-1 and the second patterned portion PA2-1 may contain a material different from the bottom surfaces of the first patterned portion PA1-1 and the second patterned portion PA2-1.

[0266] In other words, the inner surfaces of the first patterned portion PA1-1 and the second patterned portion PA2-1 may contain the same material as the first layer 1100, and the bottom surfaces of the first patterned portion PA1-1 and the second patterned portion PA2-1 may contain the same material as the second layer 1200.

[0267] Furthermore, the inner surfaces of the third pattern part PA1-2 and the fourth pattern part PA2-2 may contain a material different from the bottom surfaces of the third pattern part PA1-2 and the fourth pattern part PA2-2.

[0268] In other words, the inner surfaces of the third pattern part PA1-2 and the fourth pattern part PA2-2 may contain the same material as the third layer 1300, and the bottom surfaces of the third pattern part PA1-2 and the fourth pattern part PA2-2 may contain the same material as the second layer 1200.

[0269] Or, refer to Figure 22 The first pattern portion PA1-1, the third pattern portion PA1-2, the second pattern portion PA2-1, and the fourth pattern portion PA2-2 can be formed by etching the first layer 1100, the second layer 1200, and the third layer 1300. Specifically, the first pattern portion PA1-1, the third pattern portion PA1-2, the second pattern portion PA2-1, and the fourth pattern portion PA2-2 can be formed by completely etching the first layer 1100 and the third layer 1300 and partially etching the second layer 1200.

[0270] Therefore, the first patterned portion PA1-1 and the second patterned portion PA2-1 can be formed in the first layer 1100 as a hole shape passing through the first layer 1100, and can be formed in the second layer 1200 as a groove shape partially formed on the second layer 1200.

[0271] Therefore, the bottom surfaces of the first patterned part PA1-1 and the second patterned part PA2-1 can be the second layer 1200.

[0272] Therefore, the inner surfaces of the first patterned portion PA1-1 and the second patterned portion PA2-1 may contain different materials depending on their depth. Specifically, a portion of the inner surfaces of the first patterned portion PA1-1 and the second patterned portion PA2-1 may contain the same material as the first layer 1100, and other portions of the inner surfaces of the first patterned portion PA1-1 and the second patterned portion PA2-1 may contain the same material as the second layer 1200.

[0273] Furthermore, the inner surfaces of the first patterned portion PA1-1 and the second patterned portion PA2-1 may contain the same or different material as the bottom surfaces of the first patterned portion PA1-1 and the second patterned portion PA2-1.

[0274] That is, a portion of the inner surface of the first patterned portion PA1-1 and the second patterned portion PA2-1 may contain a material different from the bottom surface of the first patterned portion PA1-1 and the second patterned portion PA2-1, and other portions of the first patterned portion PA1-1 and the second patterned portion PA2-1 may contain the same material as the bottom surface of the first patterned portion PA1-1 and the bottom surface of the second patterned portion PA2-1.

[0275] Furthermore, the third pattern portion PA1-2 and the fourth pattern portion PA2-2 can be formed in the third layer 1300 as holes passing through the third layer 1300, and can be formed in the second layer 1200 as grooves partially formed on the second layer 1200.

[0276] Therefore, the bottom surfaces of the third pattern part PA1-2 and the fourth pattern part PA2-2 can be the second layer 1200.

[0277] Therefore, the inner surfaces of the third patterned portion PA1-2 and the fourth patterned portion PA2-2 can contain different materials depending on their depth. Specifically, a portion of the inner surfaces of the third patterned portion PA1-2 and the fourth patterned portion PA2-2 can contain the same material as the third layer 1300, and other portions of the inner surfaces of the third patterned portion PA1-2 and the fourth patterned portion PA2-2 can contain the same material as the bottom surfaces of the third patterned portion PA1-2 and the fourth patterned portion PA2-2.

[0278] Furthermore, the inner surfaces of the third pattern part PA1-2 and the fourth pattern part PA2-2 may contain the same or different materials as the bottom surfaces of the third pattern part PA1-2 and the fourth pattern part PA2-2.

[0279] In other words, a portion of the inner surface of the third pattern part PA1-2 and the fourth pattern part PA2-2 may contain a material different from the bottom surface of the third pattern part PA1-2 and the fourth pattern part PA2-2, and other portions of the inner surface of the third pattern part PA1-2 and the fourth pattern part PA2-2 may contain the same material as the bottom surface of the third pattern part PA1-2 and the fourth pattern part PA2-2.

[0280] The elastic member according to the fourth embodiment can have improved folding reliability and heat dissipation characteristics.

[0281] Specifically, by making the thickness of the first and third layers, which have high thermal conductivity, greater than the thickness of the second layer, the heat dissipation characteristics of the elastic member can be improved. Furthermore, by forming patterned portions in the first and third layers to create openings, the compressive stress applied when the elastic member is folded can be reduced, thereby facilitating the folding of the elastic member.

[0282] Furthermore, since no additional patterned portions are formed in the second layer, which has a higher yield strength, the strength of the second layer can be maintained. Therefore, when the elastic member is folded, the plastic deformation of the elastic member that occurs during the folding or recovery process can be minimized due to the second layer, which has a higher deformation rate.

[0283] Therefore, the elastic member according to the fourth embodiment can have improved folding reliability and improved heat dissipation characteristics, thus eliminating the need for an additional heat dissipation layer, thereby reducing the thickness of the elastic member or the thickness of the display device using the elastic member.

[0284] In the following text, reference will be made to Figures 23 to 27 A display device that uses an elastic member according to an embodiment is described.

[0285] Reference Figures 23 to 27 The panel 2000 can be disposed on the elastic member 1000. The elastic member 1000 and the panel 2000 can be bonded together by adhesive layers 100, 110 and 120 disposed between the elastic member 1000 and the panel 2000.

[0286] Specifically, the panel 2000 can be disposed on the second layer 1200 or the third layer 1300 of the elastic member 1000.

[0287] Panel 2000 may include at least one of a display panel and a touch panel.

[0288] A display panel can include multiple pixels, which include switching thin-film transistors, driving thin-film transistors, power storage elements, and organic light-emitting diodes (OLEDs). In the case of OLEDs, deposition can be performed at relatively low temperatures, and due to low power consumption and high brightness, deposition can be primarily applied to flexible display devices. Here, a pixel refers to the smallest unit used to display an image, and the display panel displays images through multiple pixels.

[0289] A display panel may include a substrate, gate lines disposed on the substrate, data lines isolated from the gate lines, and a common power line. Generally, a pixel can be defined by gate lines, data lines, and a common power line serving as a boundary.

[0290] The substrate can contain a flexible material (e.g., a plastic film), and the display panel can be realized by setting organic light-emitting diodes and pixel circuits on the flexible film.

[0291] A touch panel can be mounted on the display panel. The touch panel can implement touch functionality in foldable or flexible display devices, and in foldable or flexible display devices that only display images and do not have touch functionality, the touch panel can be omitted.

[0292] A touch panel may include a substrate and touch electrodes disposed on the substrate. The touch electrodes may be capacitive or resistive, and sense the position of an input device touched by a foldable or flexible display device.

[0293] The substrate of the touch panel can contain a flexible material (e.g., a plastic film), and the touch panel can be realized by setting touch electrodes on the flexible film.

[0294] Reference Figures 23 to 27 The display device may further include a protective layer 3000. Specifically, the display device may further include a protective layer 3000 disposed below the elastic member 1000.

[0295] The protective layer 3000 can be disposed below the elastic member 1000 to absorb the impact applied to the elastic member 1000.

[0296] The protective layer 3000 can be colored. For example, the protective layer 3000 can be formed in a color based on black.

[0297] The protective layer 3000 may include metal particles. For example, the protective layer 3000 may include copper particles. Therefore, by increasing the thermal conductivity of the protective layer 3000, heat generated in the display device can be dissipated through the protective layer 3000.

[0298] The protective layer 3000 can be disposed on a region of the elastic member 1000. Specifically, the protective layer 3000 can be disposed in the region corresponding to the first region 1A of the elastic member 1000. Alternatively, the protective layer 3000 can be disposed in the region corresponding to the first region 1A and the second region 2A of the elastic member 1000.

[0299] For example, the protective layer 3000 can be disposed in the regions corresponding to the first region 1A and the second region 2A of the elastic member 1000, and can be disposed in regions with an area smaller than the sum of the areas of the first region 1A and the second region 2A. Specifically, the area of ​​the protective layer 3000 can be set to 80% to 90% of the sum of the areas of the first region 1A and the second region 2A of the elastic member.

[0300] Furthermore, the thickness of the protective layer 3000 can be less than the thickness of the elastic member 1000. That is, the thickness of the protective layer 3000 can be less than the sum of the thicknesses of the first and second layers of the elastic member 1000, or the sum of the thicknesses of the first, second and third layers.

[0301] At the same time, refer to Figure 23 and Figure 27 The display device may further include a planarization layer 4000.

[0302] Specifically, when the patterned portion of the elastic member 1000 has a hole shape, or when the elastic member 1000 includes a first layer, a second layer, and a third layer and a patterned portion is formed on the first and third layers, a planarization layer 4000 can be provided on the elastic member to planarize the adhesive surface of the third layer bonded to the panel.

[0303] That is, the first adhesive layer 110 is disposed between the elastic member 1000 and the planarization layer 4000 to bond the elastic member 1000 and the planarization layer 4000, and the second adhesive layer 120 can be disposed between the planarization layer 4000 and the panel 2000 to bond the planarization layer 4000 and the panel 2000.

[0304] Therefore, when an adhesive layer is provided between the elastic member 1000 and the display panel 2000, the patterned portion prevents variations in the thickness of the adhesive layer in different areas. Thus, by preventing a decrease in the adhesive force between the elastic member 1000 and the display panel 2000 due to uneven thickness of the adhesive layer, the reliability of the display device can be improved.

[0305] Reference Figures 23 to 27 The display device can be bent. That is, the display device can be bent or folded in one direction. For example, the display device can be bent in the direction of the arrow. That is, the display device can be bent or folded in the direction in which the upper surfaces of the panel face each other.

[0306] However, the embodiments are not limited to this; the display device can be bent in the opposite direction. That is, the display device can be bent or folded in a direction in which the lower surfaces of the protective layers face each other.

[0307] Figure 28 This is a view used to depict an example of an application of an elastic component according to an embodiment.

[0308] Reference Figure 28 The elastic member according to the embodiment can be applied to a flexible display device or a foldable display device for displaying display content.

[0309] For example, the elastic member according to the embodiment can be applied to flexible display devices, such as mobile phones or tablet computers.

[0310] This elastic component can be applied to flexible display devices, such as flexible, bending, or folding mobile phones or tablets.

[0311] Elastic components are used in flexible display devices, such as flexible, bending, or folding mobile phones or tablets, and improve the folding reliability of display devices that are repeatedly folded or unfolded, thereby improving the reliability of flexible display devices.

[0312] The features, structures, and effects described in the above embodiments are included in at least one embodiment, but are not limited to one embodiment. Furthermore, those skilled in the art can combine with or modify other embodiments to incorporate the features, structures, and effects described in each embodiment. Therefore, it should be understood that the content related to the foregoing combinations and modifications is included within the scope of this invention.

[0313] Furthermore, while the foregoing description has primarily focused on embodiments, these embodiments are merely examples and do not limit the invention. Those skilled in the art will understand that various changes and applications not described above can be made without departing from the fundamental characteristics of the embodiments. For example, the various components specifically shown in the embodiments can be modified and implemented. Moreover, it should be understood that differences associated with these changes and applications should be included within the scope of the invention as defined in the appended claims.

Claims

1. An elastic member comprising a first region and a second region and foldable relative to a folding axis, said elastic member comprising: First layer; as well as The second layer is disposed on top of the first layer and is in direct contact with the first layer. The first region is defined as the region adjacent to the folding axis, including the folding axis, and the second region is defined as the region farther away from the folding axis than the first region. A first pattern portion comprising multiple holes or multiple grooves is provided in the first region of the first layer. A second pattern portion comprising multiple holes or multiple grooves is provided in the second region of the first layer. The first and second layers contain metal. The thermal conductivity of the first layer is greater than that of the second layer. The yield strength of the second layer is greater than that of the first layer, and The inner surfaces of the first patterned portion and the second patterned portion contain the same material as the first layer, and the bottom surfaces of the first patterned portion and the second patterned portion contain the same material as the second layer exposed through the first patterned portion and the second patterned portion. Each of the first patterned portion and the second patterned portion includes a hole penetrating the first layer and a groove portion partially formed in the second layer and connected to the hole.

2. The elastic member according to claim 1, wherein, The thermal conductivity of the first layer is above 20 W / mK, and The yield strength of the second layer is above 0.7 GPa.

3. The elastic member according to claim 1, wherein, The thickness of the first layer is greater than the thickness of the second layer.

4. The elastic member according to claim 1, wherein, A diffusion section is provided at the interface between the first layer and the second layer, and The diffusion section comprises the material of the first layer and the material of the second layer.

5. The elastic member according to claim 1, further comprising at least one of a first protrusion and a second protrusion disposed at the edge of the second region. in, The size of the second protrusion is larger than the size of the first protrusion.

6. The elastic member according to claim 1, wherein, The thickness of the first layer is 80 μm to 150 μm, and The thickness of the second layer is 10 μm to 50 μm.

7. The elastic member according to claim 1, wherein, The thickness of the second layer is 10% to 40% of the total thickness of the elastic member.

8. The elastic member according to claim 1, wherein, The first patterned portion and the second patterned portion are formed by partially etching the second layer.

9. The elastic member according to claim 1 further includes a third layer, the third layer being disposed on the second layer. A patterned portion comprising multiple holes or multiple grooves is provided in at least one of the first region and the second region of the third layer. The yield strength of the second layer is greater than that of the third layer, and The thermal conductivity of the third layer is greater than that of the second layer.

10. The elastic member according to claim 9, wherein, The second layer and the third layer are in direct contact with each other.

11. The elastic member according to claim 9, wherein, The thickness of the third layer is greater than the thickness of the second layer.

12. A display device, comprising: The elastic member according to claim 1; as well as A panel is disposed on the elastic member and includes at least one of a display panel and a touch panel.

13. The display device according to claim 12, further comprising a protective layer disposed below the elastic member. in, The area of ​​the protective layer is smaller than the sum of the areas of the first and second regions of the elastic member, and The thickness of the protective layer is less than the thickness of the elastic member.

14. The display device according to claim 12, further comprising a planarization layer disposed between the elastic member and the panel.

15. The display device according to claim 13, wherein, The protective layer comprises copper particles, and The area of ​​the protective layer is set to 80% to 90% of the area of ​​the elastic member.

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