Elastic member module and elastic member

Abstract

An elastic member module according to an embodiment includes an elastic member and a frame, the elastic member and the frame being connected by a bridge portion, the elastic member including a cutting region, the cutting region including a first pattern, a second pattern, and a joint portion between the first pattern and the second pattern, the first pattern and the second pattern being formed concavely with respect to the outer surface of the elastic member, and the joint portion being connected to the bridge portion.

Description

[Technical Field]

[0001] The embodiments relate to elastic member modules and elastic members. [Background technology]

[0002] Recently, there has been an increasing demand for foldable display devices capable of displaying images on a large screen.

[0003] The foldable display folds or partially bends when carried, and unfolds when displaying an image, thereby increasing the image display area and making the device easier to carry.

[0004] The foldable display device undergoes a repeated restoration process of folding, bending, and then unfolding.

[0005] Therefore, the foldable display device includes an elastic member that allows folding.

[0006] The elastic member includes a folding region and an unfolding region. The elastic member may be bent before being applied to a display device. The elastic member is coupled to a frame for storage. When the elastic member is applied to the display device, the elastic member is separated from the frame.

[0007] The elastic member includes a bridge portion. The bridge portion is connected to the frame. When the elastic member and the frame are cut, the bridge portion is also cut. At this time, a portion of the bridge portion may remain. The remaining area of ​​the bridge portion protrudes outward from the elastic member. This may cause stability issues when handling the elastic member. In addition, the bezel area of ​​the elastic member increases.

[0008] Therefore, there is a need for an elastic member with a new structure that can solve the above problems. Summary of the Invention [Problem to be solved by the invention]

[0009] The embodiments provide a resilient member that can improve stability for the user.

[0010] An embodiment provides a resilient member with a reduced bezel area. [Means for solving the problem]

[0011] An elastic member module according to an embodiment includes an elastic member and a frame, the elastic member and the frame being connected by a bridge portion, the elastic member including a cutting region, the cutting region including a first pattern, a second pattern, and a joint portion between the first pattern and the second pattern, the first pattern and the second pattern being formed concavely with respect to the outer surface of the elastic member, and the joint portion being connected to the bridge portion. [Effects of the Invention]

[0012] The elastic member module according to the embodiment includes a pattern that is connected with a joint.

[0013] The pattern is formed in a concave shape relative to the outer surface of the elastic member, so that the bridge portion can be cut inside the outer surface of the elastic member.

[0014] Therefore, the cut surface of the bridge portion is disposed inside the outer surface of the elastic member.

[0015] Therefore, the cut surface of the elastic member does not protrude beyond the outer surface of the elastic member.

[0016] This can prevent safety accidents caused by the protruding area remaining after cutting the bridge.

[0017] Also, since the protrusions are eliminated, the size of the bezel area of ​​the elastic member is reduced. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a perspective view of a display device according to an embodiment. [Figure 2] FIG. 2 is a perspective view of an elastic member according to an embodiment. [Figure 3] FIG. 10 is a side view of the elastic member according to the embodiment before folding. [Figure 4] FIG. 10 is a side view of the elastic member according to the embodiment after folding. [Figure 5] FIG. 1 is a plan view of an elastic member module including an elastic member according to an embodiment. [Figure 6] FIG. 6 is an enlarged view of region A in FIG. 5. [Figure 7] 6 is an enlarged view of area A in FIG. 5, showing a cutting line between an elastic member and a bridge portion. FIG. [Figure 8] 6 is an enlarged view of area A in FIG. 5, showing the elastic member after the bridge portion has been cut off. [Figure 9] 6 is an enlarged view of area A in FIG. 5, showing the elastic member after the bridge portion has been cut off. [Figure 10] FIG. 2 is a top view of an elastic member according to an embodiment. [Figure 11] FIG. 2 is a top view of an elastic member according to an embodiment. [Figure 12] FIG. 6 is another enlarged view of the area A in FIG. 5. [Figure 13] FIG. 13 is a cross-sectional view taken along line BB' in FIG. [Figure 14] FIG. 14 is a diagram showing that the bridge portion is cut in the overlapping region of FIG. 13. [Figure 15] FIG. 10 is a top view of an elastic member according to a second embodiment. [Figure 16] FIG. 10 is a top view of an elastic member according to a second embodiment. [Figure 17] FIG. 10 is a top view of an elastic member according to a third embodiment. [Figure 18] FIG. 10 is a top view of an elastic member module in which an elastic member and a frame are coupled together according to a third embodiment. [Figure 19] 10A and 10B are diagrams for explaining the reliability of the elastic member depending on the position of the protrusion in the example and the comparative example. [Figure 20] 10A and 10B are diagrams for explaining the reliability of the elastic member depending on the position of the protrusion in the example and the comparative example. [Figure 21] 10A and 10B are diagrams for explaining the reliability of the elastic member depending on the position of the protrusion in the example and the comparative example. [Figure 22] FIG. 11 is a top view of an elastic member according to another example of the third embodiment. [Figure 23] FIG. 11 is a top view of an elastic member according to another example of the third embodiment. [Figure 24] FIG. 11 is a top view of an elastic member according to another example of the third embodiment. [Figure 25] FIG. 11 is a top view of an elastic member according to another example of the third embodiment. [Figure 26] 1 is a cross-sectional view of a folding support including an elastic member according to an embodiment. [Figure 27] 1 is a cross-sectional view of a display device including a flexible support according to an embodiment. [Figure 28] 1A and 1B are diagrams for explaining an application example of a display device according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the technical concept of the present invention is not limited to some of the described embodiments, and may be embodied in various different forms, and one or more of the components of the embodiments may be selectively combined or substituted within the scope of the technical concept of the present invention. Furthermore, terms (including technical and scientific terms) used in the embodiments of the present invention may be interpreted as having meanings that are commonly understood by those skilled in the art to which the present invention pertains, unless otherwise clearly defined and described. Commonly used terms, such as predefined terms, may be interpreted in light of the context of the relevant art.

[0020] Furthermore, the terms used in the examples of the present invention are intended to describe the examples and do not limit the present invention. In this specification, unless otherwise specified in the phrase, the singular form can also include the plural form, and when described as "A and (and) at least one (or one or more) of B and C," it can include one or more of all combinations that can be combined with A, B, and C.

[0021] Furthermore, in describing the components of the present invention, terms such as first, second, A, B, (a), (b), etc. are used merely to distinguish the component from other components, and the terms do not limit the essence, order, or sequence of the components.

[0022] Furthermore, when a component is described as being "coupled," "coupled," or "connected" to another component, it can include not only cases where the component is directly coupled, coupled, or connected to the other component, but also cases where the component is "coupled," "coupled," or "connected" by another component between the component and the other component.

[0023] Furthermore, when it is stated that a component is formed or positioned "above or below" each component, "above" or "below" includes not only the case where the two components are in direct contact with each other, but also the case where one or more other components are formed or positioned between the two components.

[0024] Furthermore, when expressed as "above" or "below," it can mean not only the upward direction but also the downward direction based on one component.

[0025] Hereinafter, an elastic member, a folding support, and a display device according to an embodiment will be described with reference to the drawings.

[0026] FIG. 1 is a perspective view of a display device according to an embodiment, and FIGS. 2 to 4 are perspective and cross-sectional views of an elastic member according to an embodiment.

[0027] Referring to FIG. 1, the display device 10 may include an elastic member 100 , a display panel 2000 disposed on the elastic member 100 , and a touch panel 3000 .

[0028] The elastic member 100 supports the display panel 2000 and the touch panel 3000. That is, the elastic member 100 may be a supporting substrate.

[0029] The touch panel 3000 and the display panel 2000 may be integrally formed. For example, the touch panel 3000 may be integrally formed with the display panel 2000 in an on-cell or in-cell manner.

[0030] The elastic member 100 may include metallic and non-metallic materials. Specifically, the elastic member 100 may be formed of multiple layers. The multiple layers may include at least one of metallic and non-metallic materials. For example, the elastic member 100 may include metal, metal alloy, plastic, composite material (e.g., carbon fiber reinforced plastic, magnetic or conductive material, glass fiber reinforced material), ceramic, sapphire, or glass.

[0031] The elastic member 100 may be flexible or foldable, i.e., the elastic member 100 may bend in one direction, i.e., the elastic member 100 may be a display substrate applied to a flexible display device or a foldable display device.

[0032] A first direction 1D and a second direction 2D are defined for the elastic member 100. For example, the first direction 1D may be a folding axis direction of the elastic member 100. The second direction may be perpendicular to the first direction.

[0033] One of the first direction 1D and the second direction 2D is the width direction of the elastic member 100, and the other direction is the longitudinal direction of the elastic member 100.

[0034] The elastic member 100 is folded with the first direction 1D or the second direction 2D as a folding axis.

[0035] Hereinafter, the first direction is defined as the folding axis direction, the width direction of the elastic member 100, and the second direction as the length direction of the elastic member 100.

[0036] The elastic member 100 may include at least two regions. In particular, the elastic member 100 may include a first region 1A and a second region 2A.

[0037] The first region 1A is a region where the elastic member 100 is folded. That is, the second region 2A is a region where the elastic member 100 is not folded. That is, the first region 1A is a folding region, and the second region 2A is an unfolding region.

[0038] The display panel 2000 is disposed on the elastic member 100 .

[0039] The display panel 2000 may include a plurality of pixels, each including a switching thin film transistor, a driving thin film transistor, a storage element, and an organic light emitting diode (OLED).

[0040] The touch panel 3000 is disposed on the display panel 2000. The display device has a touch function due to the touch panel 3000. A display device that displays only images may omit the touch panel.

[0041] The touch panel 3000 includes a substrate and a touch electrode disposed on the substrate, and the touch electrode is driven in a capacitive or resistive manner.

[0042] When the elastic member 100 and the display panel 2000 are integrally formed, the thickness of the display device can be reduced.

[0043] The elastic member 100 and the display panel 2000 may have different sizes.

[0044] For example, the area of ​​the elastic member 100 may be 90% to 110% of the area of ​​the display panel 2000. In particular, the area of ​​the elastic member 100 may be 95% to 105% of the area of ​​the display panel 2000. More particularly, the area of ​​the elastic member 100 may be 97% to 100% of the area of ​​the display panel 2000.

[0045] If the area of ​​the elastic member 100 is less than 90% of the area of ​​the display panel 2000, the supporting force of the elastic member 100 is reduced, and therefore, a curl phenomenon may occur in the unfolding region of the elastic member 100.

[0046] Furthermore, if the area of ​​the elastic member 100 exceeds 110% of the area of ​​the display panel 2000, the bezel area of ​​the display device increases.

[0047] Although not shown in the drawings, the display device may further include a cover window. The cover window is disposed on the touch panel 3000. Alternatively, if the touch panel is omitted, the cover window is disposed on the display panel 2000. The cover window protects the display device.

[0048] The elastic member 100, the display panel 2000, and the touch panel 3000 are bonded together by an adhesive layer.

[0049] As described above, the display device includes an elastic member 100 .

[0050] Referring to FIGS. 2 to 4, the elastic member 100 can bend in one direction.

[0051] The elastic member 100 includes a first surface 1S and a second surface 2S. The first surface 1S and the second surface 2S are opposite surfaces. The elastic member 100 may bend so that the first surface 1S faces. That is, the elastic member 100 may bend so that the surface on which the panel is placed faces. Alternatively, the elastic member 100 may bend so that the second surface 2S faces. That is, the elastic member 100 may bend so that the surface opposite to the surface on which the panel is placed faces.

[0052] In the following description, it is assumed that the first surfaces 1S bend in directions opposite to each other as shown in FIG.

[0053] The first region 1A and the second region 2A are regions defined when the elastic member 100 is bent.

[0054] In detail, the first region 1A is a folding region, and the second region 2A is an unfolding region.

[0055] 3 and 4, the elastic member 100 includes the first region 1A and the second region 2A.

[0056] For example, the second regions 2A may be formed on the left and right sides of the first region 1A, respectively. That is, the second regions 2A may be disposed at both ends of the first region 1A. That is, the first region 1A may be disposed between the second regions 2A.

[0057] However, the embodiment is not limited thereto. The first region 1A may be further formed outside the second region 2A.

[0058] The first region 1A and the second region 2A may have different sizes. Specifically, the size of the second region 2A is larger than the size of the first region 1A.

[0059] The area of ​​the first region 1A may be 1% to 30% of the total area of ​​the elastic member 100. Specifically, the area of ​​the first region 1A may be 5% to 20% of the total area of ​​the elastic member 100. The area of ​​the first region 1A may be 10% to 15% of the total area of ​​the elastic member 100.

[0060] If the area of ​​the first region 1A is less than 1% of the total area of ​​the elastic member 100, cracks may occur at the interface between the folding region and the unfolding region of the elastic member 100, thereby reducing the folding reliability of the elastic member 100.

[0061] Furthermore, if the area of ​​the first region 1A exceeds 30% of the total area of ​​the elastic member 100, curling may occur in the folding region of the display panel 2000.

[0062] FIG. 4 is a side view of the folded elastic member.

[0063] 4, the elastic member 100 is folded in one direction around a folding axis. Specifically, the elastic member 100 is folded along the folding axis (FAX) in a direction in which the first surfaces 1S face each other.

[0064] As a result, a first region 1A and a second region 2A can be formed in the elastic member 100. That is, the elastic member 100 can be formed with a folding region and an unfolding region.

[0065] The folding region is a region where a curvature (R) is formed. The unfolding region is a region where a curvature (R) is not formed. The unfolding region is also a region where the curvature is close to zero.

[0066] 3 and 4, the elastic member 100 may be folded in one direction to form an unfolding region, a folding region, and another unfolding region in this order.

[0067] At least one of the first region 1A and the second region 2A may have a plurality of patterned portions formed therein. The patterned portions reduce and distribute stress generated when the elastic member 100 is folded. The patterned portions will be described in detail below.

[0068] 4 shows that the curvature decreases as the elastic member 100 extends from the center of the folding axis. However, the embodiment is not limited thereto. For example, the curvature may decrease or increase as the elastic member 100 extends from the center of the folding axis. That is, the curvature may decrease and then increase as the elastic member 100 extends from the center of the folding axis. Alternatively, the curvature may decrease, increase, and then decrease again as the elastic member 100 extends from the center of the folding axis. That is, the folding shape of the elastic member 100 may be formed in various shapes other than a U-shape.

[0069] The elastic member 100 has a thin thickness. Therefore, the elastic member 100 can bend in one direction. Therefore, the elastic member is combined with a frame 200 before being applied to a display device. That is, an elastic member module 1000 is manufactured in which the elastic member 100 and the frame 200 are combined. When the elastic member 100 is applied to a display device, the elastic member 100 and the frame 200 are separated.

[0070] FIG. 5 is a plan view of the elastic member module 1000. As shown in FIG.

[0071] 5, the elastic member module 1000 includes the elastic member 100, the frame 200, and a bridge portion BR. The elastic member 100 and the frame 200 are connected by the bridge portion BR. In particular, the elastic member 100 and the frame 200 are separated by a hole H. The elastic member 100 and the frame 200 are also connected by the bridge portion BR.

[0072] The elastic member 100 and the frame 200 may include the same material, and are separated from each other by the bridge portion BR.

[0073] The bridge portions BR are disposed on the outer sides of the elastic member 100. In particular, a plurality of bridge portions BR are disposed on the edges of the elastic member 100.

[0074] The bridge portion BR has a predetermined width and length, and the width of the bridge portion BR may increase as it extends from the elastic member 100 to the frame 200.

[0075] The bridge portion BR is a region that connects the elastic member 100 and the frame 200. The bridge portion BR also separates the elastic member 100 from the frame 200. For example, when a force is applied to one region of the bridge portion BR, the bridge portion BR is cut, thereby separating the elastic member 100 from the frame 200.

[0076] After the elastic member 100 is separated, a portion of the bridge portion BR may remain at the edge of the elastic member 100. That is, a portion of the bridge portion BR may remain connected to the elastic member 100.

[0077] Therefore, the remaining portion of the bridge part BR protrudes outward from the elastic member 100. This may cause a safety issue when a user handles the elastic member 100. Also, the remaining portion may increase the bezel area of ​​the elastic member 100.

[0078] To solve this problem, the elastic member according to the embodiment changes the cutting area of ​​the bridge portion, so that the elastic member can remove the remaining part of the bridge portion.

[0079] 6 to 9 are diagrams for explaining the state before and after cutting of the elastic member and the bridge portion.

[0080] 6, the elastic member 100 includes a cutting region CA, which is a region where the elastic member 100 is cut from the bridge portion BR.

[0081] The cutting area CA includes a first recess C1, a second recess C2, and a joint CP.

[0082] The first recess C1 and the second recess C2 may be formed in a concave shape relative to the outer surface OS of the elastic member. Specifically, the first recess C1 and the second recess C2 may be formed by etching the outer surface OS into a concave polygonal shape. As a result, the width of the elastic member in the region including the first recess C1 and the second recess C2 may be smaller than the width of the elastic member in other regions.

[0083] The joint portion CP is disposed between the first recess C1 and the second recess C2. The joint portion CP is a region of the elastic member 100. The joint portion CP is adjacent to the first recess C1 and the second recess C2. Specifically, the joint portion CP is connected to the first recess C1 and the second recess C2.

[0084] The joint portion CP is a region where the elastic member 100 and the bridge portion BR are connected, so that the joint portion CP and the bridge portion BR can form a boundary region BA.

[0085] The elastic member 100 and the bridge portion BR are cut at the joint portion CP. Specifically, the elastic member 100 is separated from the bridge portion BR by the first recess C1 and the second recess C2.

[0086] Specifically, the first recess C1 and the second recess C2 form a space in which the joint portion CP can be cut. The joint portion CP is cut using the space.

[0087] The first recess C1 and the second recess C2 have a set size. Specifically, the first recess C1 has a first width W1. The second recess C2 has a second width W2.

[0088] The first width W1 and the second width W2 may be 30% or less of the width of the cutting area CA. Specifically, the first width W1 and the second width W2 may be 15% to 30%, 18% to 28%, or 23% to 27% of the width of the cutting area CA.

[0089] The first width W1 and the second width W2 may be the same or similar within the range.

[0090] If the first width W1 and the second width W2 are greater than 30% of the width of the cutting area CA, the width of the area where the joint portion CP and the bridge portion BR are connected is reduced, thereby reducing the bonding strength between the elastic member 100 and the frame 200. As a result, the elastic member 100 and the frame 200 may be separated when handling the elastic member 100.

[0091] If the first width W1 and the second width W2 are less than 15% of the width of the cutting area CA, the first width W1 and the second width W2 will be too small. Therefore, when cutting the joint CP, areas other than the joint CP may be cut along with the cutting. This may reduce the reliability of the elastic member 100.

[0092] For example, the first width W1 and the second width W2 may be 0.5 mm or less, 0.4 mm or less, 0.3 mm or less, or 0.2 mm or less.

[0093] The first recess C1 has a first height H1, and the second recess C2 has a second height H2.

[0094] The first height H1 may be smaller than the first width W1. The second height H2 may be smaller than the second width W2. Specifically, the first height H1 may be 40% or less of the first width W1. Specifically, the first height H1 may be 20% to 40%, 25% to 35%, or 27% to 33% of the first width W1.

[0095] The second height H2 may be 20% to 40%, 25% to 35%, or 27% to 33% of the second width W2.

[0096] The first height H1 and the second height H2 may be the same or similar within the range.

[0097] When the first height H1 and the second height H2 are greater than 40% of the first width W1 and the second width W2, the sizes of the first recess C1 and the second recess C2 are increased, which can reduce the strength of the elastic member and increase the bezel area of ​​the elastic member.

[0098] Furthermore, if the first height H1 and the second height H2 are less than 20% of the first width W1 and the second width W2, respectively, the sizes of the first recess C1 and the second recess C2 are reduced. This reduces the height of the joint CP. This reduces the cutting area of ​​the joint CP. Therefore, the elastic member and the bridge portion cannot be easily cut. Or, defects may occur during the cutting process.

[0099] As an example, the first height H1 and the second height H2 may be 0.2 mm or less, 0.15 mm or less, or 0.1 mm or less.

[0100] The joint portion CP may be cut at various regions. Referring to Figure 7, the joint portion CP may be cut at a first cutting line CL1 in the boundary region BA. Alternatively, the joint portion CP may be cut at a second cutting line CL2 below the boundary region BA.

[0101] 8 and 9, the cut surface CS of the elastic member 100 may be parallel to the outer surface OS of the elastic member 100 or may have a step SH.

[0102] When the joint portion CP and the bridge portion BR are cut along the first cutting line CL1, the cutting surface CS and the outer surface OS may be parallel to each other.

[0103] Alternatively, when the joint portion CP and the bridge portion BR are cut along the second cutting line CL2, the cut surface CS and the outer surface OS may have a step SH. That is, the cut surface CS and the outer surface OS may have different heights. Specifically, the height of the cut surface CS is lower than the height of the outer surface OS. This forms the step.

[0104] Therefore, when the elastic member and the bridge portion are separated, the protruding portion due to the remaining portion of the bridge portion is removed. That is, the cutting plane CS is parallel to or positioned at a lower height than the outer surface of the elastic member. This prevents the remaining portion of the bridge portion from protruding outward from the elastic member.

[0105] This improves safety for the user, and also prevents the bezel area of ​​the elastic member from being increased by the protruding area.

[0106] The elastic member separated from the frame will now be described with reference to FIGS.

[0107] 10 and 11 are top views of the elastic member 100. FIG.

[0108] The elastic member 100 includes a first region 1A and a second region 2A. The first region 1A is folded in one direction. The second region 2A is not folded. Alternatively, a portion of the second region 2A may be folded and another portion may not be folded.

[0109] For example, the second region 2A may include a 2-1 region 2-1A and a 2-2 region 2-2A. Specifically, the 2-1 region 2-1A is a region where a pattern is formed. The 2-2 region 2-2A is a region where no pattern is formed. The 2-1 region 2-1A is a boundary region between the folding region and the unfolding region.

[0110] The first region 1A and the second region 2A have different widths. Specifically, the width of the first region 1A is smaller than the width of the second region 2A. The width of the first region 1A is the width in the second direction 2D. For example, the width of the first region 1A may be 15 mm to 30 mm, 18 mm to 27 mm, or 20 mm to 25 mm.

[0111] The elastic member includes a pattern portion including a plurality of patterns. The pattern portion is disposed in the first region 1A and the second region 2A. For example, as shown in FIG. 10, the pattern portion may be disposed only in the first region. Alternatively, as shown in FIG. 11, the pattern portion may be disposed in both the first region 1A and the second region 2A.

[0112] For example, a first pattern portion PA1 and a second pattern portion PA2 may be arranged in the first region 1A. The first pattern portion PA1 includes a plurality of first patterns P1 spaced apart in a first direction. The second pattern portion PA2 includes a plurality of second patterns P2 spaced apart in the first direction.

[0113] A third pattern portion PA3 and a fourth pattern portion PA4 may be arranged in the second region 2A. The third pattern portion PA3 includes a plurality of third patterns P3 spaced apart in a first direction. The fourth pattern portion PA4 includes a plurality of fourth patterns P4 spaced apart in the first direction.

[0114] The first pattern portion PA1 and the second pattern portion PA2 are arranged in the first region 1 A. The third pattern portion PA3 and the fourth pattern portion PA4 are arranged in the 2-1 region 2-1A.

[0115] The first pattern portions PA1 are spaced apart in the second direction 2D. The second pattern portions PA2 are spaced apart in the second direction 2D. The first pattern portions PA1 and the second pattern portions PA2 are spaced apart in the second direction 2D. The first pattern portions PA1 and the second pattern portions PA2 are alternately arranged.

[0116] The first pattern P1 and the second pattern P2 face each other in the second direction 2D. For example, the first pattern P1 and the second pattern P2 partially overlap each other in the second direction 2D. For example, the first pattern P1 and the second pattern P2 are arranged in a zigzag pattern.

[0117] However, the embodiment is not limited thereto. The first pattern P1 and the second pattern P2 may be completely overlapped in the second direction 2D.

[0118] The first pattern P1 and the second pattern P2 are formed to penetrate the elastic member 100. For example, the first pattern P1 and the second pattern P2 penetrate the entire elastic member 100. As a result, the first pattern P1 and the second pattern P2 may be formed in a hole shape. Alternatively, the first pattern P1 and the second pattern P2 may partially penetrate the elastic member 100. As a result, the first pattern P1 and the second pattern P2 may be formed in a groove shape.

[0119] The first pattern portion PA1 and the second pattern portion PA2 reduce and distribute stress generated by folding, thereby preventing deformation of the first region 1A when the elastic member is folded.

[0120] The length (length in the first direction) of at least one of the first pattern P1 and the second pattern P2 may be 2 mm to 5 mm, 3 mm to 4 mm, or 3.3 mm to 3.8 mm. The width (width in the second direction) of at least one of the first pattern P1 and the second pattern P2 may be 0.1 mm to 0.3 mm, 0.15 mm to 0.25 mm, or 0.17 mm to 0.22 mm. The first distance (distance in the first direction) between the first pattern P1 and the second pattern P2 may be 0.1 mm to 0.3 mm, 0.15 mm to 0.25 mm, or 0.17 mm to 0.22 mm. The second distance (distance in the second direction) between the first pattern P1 and the second pattern P2 may be 0.01 mm to 0.2 mm, 0.05 mm to 0.15 mm, or 0.07 mm to 0.12 mm.

[0121] At least one of the first patterns P1 opens an end region of the elastic member, specifically, an end region of the elastic member that faces the first direction 1D.

[0122] The hinge portion HN is formed by a first pattern P1 that opens the end region of the elastic member.

[0123] The elastic member 100 can be easily folded by the hinge part HN, that is, the hinge part HN is the point where folding of the first region 1A starts.

[0124] The first area 1A and the second area 2A are defined by the pattern portions PA1 and PA2. Specifically, the first area 1A is the area from the start point to the end point of the pattern portions PA1 and PA2. The second area 2A is the area other than the first area 1A.

[0125] Alternatively, the first region 1A is a region from the first pattern portion PA1, PA2 to the last pattern portion PA1, PA2 among the plurality of pattern portions PA1, PA2. The second region 2A is a region other than the first region 1A.

[0126] Alternatively, the first region 1A is the region from the first hinge portion HN to the last hinge portion HN. Furthermore, the second region 2A is the region other than the first region 1A.

[0127] The third pattern portion PA3 is spaced apart in the second direction 2D. The fourth pattern portion PA4 is spaced apart in the second direction 2D. The third pattern portion PA3 and the fourth pattern portion PA4 are also spaced apart in the second direction 2D.

[0128] The third pattern P3 and the fourth pattern P4 face each other in the second direction 2D. For example, the third pattern P3 and the fourth pattern P4 partially overlap each other in the second direction 2D.

[0129] The third pattern P3 and the fourth pattern P4 are formed to penetrate the elastic member 100. For example, the third pattern P3 and the fourth pattern P4 penetrate the entire elastic member 100. As a result, the third pattern P3 and the fourth pattern P4 may be formed in a hole shape. Alternatively, the third pattern P3 and the fourth pattern P4 may partially penetrate the elastic member 100. As a result, the third pattern P3 and the fourth pattern P4 may be formed in a hole shape.

[0130] The size of the third pattern P3 may vary with increasing distance from the first region 1A, the outermost first pattern portion PA1, or the outermost hinge portion HN. Specifically, the size of the third pattern P3 may decrease with increasing distance from the first region 1A, the outermost first pattern portion PA1, or the outermost hinge portion HN.

[0131] 11, the length of the third pattern P3 may decrease with increasing distance from the first region 1A, the outermost first pattern portion PA1, or the outermost hinge portion HN, or the width of the third pattern P3 may decrease with increasing distance from the first region 1A, the outermost first pattern portion PA1, or the outermost hinge portion HN, or the spacing of the third pattern P3 may increase with increasing distance from the first region 1A, the outermost first pattern portion PA1, or the outermost hinge portion HN.

[0132] The minimum length of the third pattern P3 may be 1.0 mm to 5.0 mm, 1.5 mm to 3.0 mm, or 2.0 mm to 2.5 mm, and the maximum interval of the third pattern P3 may be 0.5 mm to 2.5 mm, 1.0 mm to 2.0 mm, or 1.5 mm to 1.8 mm.

[0133] The minimum distance between the outermost edge of the elastic member 100 and the outermost edge of the third pattern P3 may be 1 mm to 10 mm, 2 mm to 8 mm, or 3.5 mm to 7 mm. The maximum distance between the outermost edge of the elastic member 100 and the outermost edge of the third pattern P3 may be 5 mm to 20 mm, 6.5 mm to 15 mm, or 8 mm to 9 mm.

[0134] The width (width in the second direction) of the 2-1 region 2-1A may be 3 mm to 12 mm, 4.5 mm to 10.5 mm, or 6 mm to 8 mm.

[0135] In addition, the size of the fourth pattern P4 may vary with increasing distance from the first region 1A, the outermost first pattern portion PA1, or the outermost hinge portion HN. Specifically, the size of the fourth pattern P4 may decrease with increasing distance from the first region 1A, the outermost first pattern portion PA1, or the outermost hinge portion HN.

[0136] 11, the length of the fourth pattern P4 may decrease with increasing distance from the first region 1A, the outermost first pattern portion PA1, or the outermost hinge portion HN, or the width of the fourth pattern P4 may decrease with increasing distance from the first region 1A, the outermost first pattern portion PA1, or the outermost hinge portion HN, or the spacing of the fourth pattern P4 may increase with increasing distance from the first region 1A, the outermost first pattern portion PA1, or the outermost hinge portion HN.

[0137] The minimum length of the fourth pattern P4 may be 1.0 mm to 5.0 mm, 1.5 mm to 3.0 mm, or 2.0 mm to 2.5 mm, and the maximum interval of the fourth pattern P4 may be 0.5 mm to 2.5 mm, 1.0 mm to 2.0 mm, or 1.5 mm to 1.8 mm.

[0138] The minimum distance between the outermost edge of the elastic member 100 and the outermost edge of the fourth pattern P4 may be 1 mm to 10 mm, 2 mm to 8 mm, or 3.5 mm to 7 mm. The maximum distance between the outermost edge of the elastic member 100 and the outermost edge of the fourth pattern P4 may be 5 mm to 20 mm, 6.5 mm to 15 mm, or 8 mm to 9 mm.

[0139] That is, the third pattern portion PA3 and the fourth pattern portion PA4 may include a pattern whose size varies depending on the position. That is, the third pattern portion PA3 and the fourth pattern portion PA4 may include a gradation pattern. This prevents the pattern from being visible at the boundary between the first region 1A and the 2-2 region 2-2A.

[0140] If the third pattern portion PA3 and the fourth pattern portion PA4 were not present, the boundary region between the first region and the 2-2 region would be visible from the outside. However, the third pattern portion PA3 and the fourth pattern portion PA4 are arranged in the 2-1 region. Furthermore, the sizes of the third pattern portion PA3 and the fourth pattern portion PA4 vary. Therefore, it is possible to prevent the boundary region between the first region and the 2-2 region from being visible from the outside.

[0141] The elastic member 100 includes the cutting region CA. The cutting region CA is a region where the elastic member 100 and the bridge portion BR are cut.

[0142] The cutting area CA is disposed in the second area 2A.

[0143] The cutting area CA has a set size, specifically, the width of the cutting area CA is larger than the distance between the first and second patterns in the first area in the first direction, and is smaller than the length of the first and second patterns.

[0144] The width of the cutting area CA is greater than the width of the first and second patterns in the first area, and is smaller than the minimum length of the third and fourth patterns in the 2-1 area.

[0145] The width of the cutting area CA may be more than five times the width of the first and second patterns, and may be smaller than the maximum distance in the second direction between the third and fourth patterns of the 2-1 region.

[0146] Therefore, the folding characteristics of the elastic member are improved by the cutting region CA. If the width of the cutting region CA is greater than the length of the first and second patterns, the width of the cutting region becomes larger. As a result, the region overlapping the first and second patterns in the first direction 1D may not be folded during a folding test or during the process of manufacturing the elastic member. As a result, a portion of the 2-1 region overlapping the cutting region in the first direction may not function as a boundary region. Furthermore, stress may be concentrated due to sudden folding, which may damage the elastic member.

[0147] Furthermore, if the width of the cutting area CA is smaller than the distance between the first and second patterns in the first direction, the protrusions may be cut during a folding test or during the process of manufacturing the elastic member.

[0148] The cutting area CA includes a cutting surface CS, a first recess C1, and a second recess C2.

[0149] The cut surface CS is a surface where the elastic member 100 is cut from the bridge portion BR. As a result, the cut surface CS and the outer surface OS may have different surface roughness and shape.

[0150] For example, the surface roughness of the cut surface CS may be different from the surface roughness of the outer surface OS. Specifically, the surface roughness of the cut surface CS may be greater than the surface roughness of the outer surface OS.

[0151] The cut surface CS may include an inclined surface or a curved surface.

[0152] The first recess C1 and the second recess C2 may be recessed relative to the outer surface OS of the elastic member 100.

[0153] The first recess C1 and the second recess C2 may have a predetermined size. Specifically, the first recess C1 has a first width W1. The second recess C2 has a second width W2.

[0154] The first width W1 and the second width W2 may be 30% or less of the width of the cutting area CA. Specifically, the first width W1 and the second width W2 may be 15% to 30%, 18% to 28%, or 23% to 27% of the width of the cutting area CA.

[0155] The first width W1 and the second width W2 may be the same or similar within the range.

[0156] If the first width W1 and the second width W2 are greater than 30% of the width of the cutting area CA, the area where the joint portion CP and the bridge portion BR are connected will be reduced, thereby reducing the bonding strength between the elastic member 100 and the frame 200. As a result, the elastic member 100 and the frame 200 may be separated when handling the elastic member 100.

[0157] If the first width W1 and the second width W2 are less than 15% of the width of the cutting area CA, the first width W1 and the second width W2 will be small. As a result, when cutting the joint CP, areas other than the joint CP may be cut. This reduces the reliability of the elastic member 100.

[0158] The first width W1 and the second width W2 may be smaller than one-third of the width of the cutting region. Alternatively, the first width W1 and the second width W2 may be larger than the spacing between the first and second patterns in the first direction. Alternatively, the first width W1 and the second width W2 may be smaller than the length of the first and second patterns. Alternatively, the first width W1 and the second width W2 may be larger than the width of the first and second patterns. Alternatively, the first width W1 and the second width W2 may be smaller than the minimum length of the third and fourth patterns. Alternatively, the first width W1 and the second width W2 may be larger than the width of the first and second patterns. Alternatively, the first width W1 and the second width W2 may be smaller than the maximum spacing between the third and fourth patterns in the second direction.

[0159] Therefore, the folding characteristics of the elastic member are improved by the cutting region CA. If the width of the cutting region CA is greater than the length of the first and second patterns, the width of the cutting region becomes larger. As a result, the region overlapping the first and second patterns in the first direction 1D may not be folded during a folding test or during the process of manufacturing the elastic member. As a result, a portion of the 2-1 region overlapping the cutting region in the first direction may not function as a boundary region. Furthermore, stress may be concentrated due to sudden folding, which may damage the elastic member.

[0160] Furthermore, if the width of the cutting area CA is smaller than the distance between the first and second patterns in the first direction, the protrusions may be cut during a folding test or during the process of manufacturing the elastic member.

[0161] The heights H1 and H2 of the recesses C1 and C2 may be the same as or different from the third height. The third height H3 is the height from the bottom surface BS of the recesses C1 and C2 to the cut surface. That is, as shown in FIG. 10, the heights H1 and H2 of the recesses C1 and C2 may be the same as the third height H3. Alternatively, the heights H1 and H2 of the recesses C1 and C2 may be different from the third height H3.

[0162] Specifically, the first height H1 may be the depth of the recesses C1 and C2, i.e., the first height H1 is the distance in the first direction from the innermost side of the recesses C1 and C2 to the outer surface OS of the elastic member.

[0163] The third height H3 may be less than the first and second heights H1 and H2. That is, the outer surface OS protrudes outward from the elastic member more than the cut surface CS. This allows the cut surface CS to be positioned flush with the outer surface OS. Alternatively, the cut surface CS may be positioned more inward than the outer surface OS. That is, a step SH exists between the cut surface CS and the outer surface OS. Furthermore, the cut surface CS may be positioned more inward than the outer surface OS.

[0164] Therefore, when a user handles the elastic member, the user can be prevented from coming into contact with the cut surface CS, thereby improving user safety. Furthermore, the cut surface CS does not protrude beyond the outer surface OS, thereby preventing the bezel area of ​​the elastic member from increasing.

[0165] The first and second heights H1 and H2 may be greater than 0.1 times the spacing between the first and second patterns in the first direction. The first and second heights H1 and H2 may be less than twice the spacing between the first and second patterns in the second direction. The first and second heights H1 and H2 may be greater than 0.5 times the spacing between the first and second patterns in the first direction. The first and second heights H1 and H2 may be less than the spacing between the first and second patterns in the second direction.

[0166] This improves folding characteristics. If the first and second heights H1 and H2 are greater than twice the distance between the first and second patterns in the second direction, the size of the first and second patterns, which are concave-angled, increases. Therefore, the first and second patterns can function as hinges. Therefore, folding can occur in undesired areas. Also, if the first and second heights H1 and H2 are less than 0.1 times the distance between the first and second patterns in the first direction, residual protrusions can cause stability problems during folding tests or when manufacturing elastic members. Also, the bezel area can increase.

[0167] Furthermore, a step SH between the cut surface CS and the outer surface OS may be smaller than the first and second heights. Alternatively, the step SH may be larger than 0.1 times the distance between the first and second patterns in the first direction. Alternatively, the step SH may be smaller than the distance between the first and second patterns in the second direction. Alternatively, the step SH may be larger than 0.5 times the distance between the first and second patterns in the first direction. Alternatively, the step SH may be smaller than 0.7 times the distance between the first and second patterns in the second direction.

[0168] This improves folding characteristics. If the step SH is greater than the first and second heights, a remaining protrusion may cause stability problems during folding testing or when manufacturing the elastic member. The bezel area may also increase. If the step SH is less than 0.1 times the distance between the first and second patterns in the first direction, the size of the first and second patterns, which are shaped like a hidden angle, increases. Therefore, the first and second patterns may function as hinges. This may result in folding in undesirable areas.

[0169] Elastic members according to other embodiments will be described below with reference to Figures 5 and 12 to 16. Descriptions of parts that are the same as or similar to the above-described embodiments will be omitted.

[0170] 5, when a force is applied to one area of ​​the bridge portion BR, the bridge portion BR is cut, thereby separating the elastic member 100 and the frame 200.

[0171] To easily cut the bridge portion BR, a cutting area may be set in one area of ​​the bridge portion BR. Then, the cutting area may be etched to a set depth. Thus, the thickness of the cutting area may be smaller than the thickness of other areas. That is, the cutting area may be a groove formed in the bridge portion BR.

[0172] The elastic member may have a plurality of pattern portions formed thereon, which are formed by a roll-to-roll process, so that tension may be applied to the elastic member in a longitudinal direction.

[0173] This allows the groove-shaped cutting region to be cut while increasing its width, thereby allowing the elastic member to be separated from the frame before being applied to a display device.

[0174] Referring to FIG. 12, the elastic member 100 and the frame 200 are connected by the bridge portion BR.

[0175] The bridge portion BR includes a cutting area CA. The cutting area CA includes a first groove G1 and a second groove G2. Specifically, the bridge portion BR includes one surface and another surface opposite the one surface. The one surface corresponds to one surface of the elastic member. The other surface corresponds to the other surface of the elastic member.

[0176] The first groove G1 is disposed on one surface of the bridge portion BR. That is, the first groove G1 is formed by etching the one surface. The second groove G2 is disposed on the other surface of the bridge portion BR. That is, the second groove G2 is formed by etching the other surface.

[0177] The cutting area CA also includes an overlapping area OA. The overlapping area OA is an area where the first groove G1 and the second groove G2 overlap. Specifically, the first groove G1 and the second groove G2 overlap in the first direction 1D in the cutting area CA. That is, the first groove G1 and the second groove G2 overlap in the width direction of the elastic member 100 in the cutting area CA.

[0178] The first groove G1 and the second groove G2 have set widths and heights. Specifically, the first groove G1 has a first width W1 and a first height H1. The second groove G2 has a second width W2 and a second height H2.

[0179] At least one of the first width W1 and the second width W2 may be smaller than the thickness T of the bridge portion BR. In particular, at least one of the first width W1 and the second width W2 may be 50% or less, 40% or less, or 30% or less of the thickness T of the bridge portion BR. For example, at least one of the first width W1 and the second width W2 may be 25% to 50%, 30% to 45%, or 35% to 40% of the thickness T of the bridge portion BR.

[0180] Additionally, the first width W1 and the second width W2 may be the same or similar.

[0181] When at least one of the first width W1 and the second width W2 is less than 25% of the thickness T of the bridge portion BR, the size of the cutting area CA can be reduced, so that the elastic member 100 is not easily separated by the cutting area.

[0182] Furthermore, if at least one of the first width W1 and the second width W2 exceeds 50% of the thickness T of the bridge portion BR, the size of the cutting area CA can be increased. This increases the size of the bridge portion BR, and therefore the size of the elastic material module. This also increases the area etched by the bridge portion BR. This may reduce the strength of the bridge portion BR. This may cause the bridge portion BR to break when handling the elastic material module.

[0183] At least one of the first height H1 and the second height H2 may be smaller than the thickness T of the bridge portion BR. In particular, at least one of the first height H1 and the second height H2 may be 50% or less, 40% or less, or 30% or less of the thickness T of the bridge portion BR. For example, at least one of the first height H1 and the second height H2 may be 25% to 50%, 30% to 45%, or 35% to 40%.

[0184] Additionally, the first height H1 and the second height H2 may be the same or similar.

[0185] If at least one of the first height H1 and the second height H2 is less than 25% of the thickness T of the bridge portion BR, the area remaining unetched by the first groove G1 and the second groove G2 increases. As a result, a large force is required to cut the bridge portion BR. Therefore, the elastic member 100 is not easily separated by the cut area.

[0186] Furthermore, if at least one of the first height H1 and the second height H2 exceeds 50% of the thickness T of the bridge portion BR, the etched area increases, which may reduce the strength of the bridge portion BR and cause the bridge portion BR to break when handling the elastic member module.

[0187] The height H3 of the overlapping region OA is smaller than the thickness T of the bridge portion BR. The height H3 of the overlapping region OA may be defined as the maximum height of the overlapping region OA. The height of the overlapping region OA may vary while extending in the first direction.

[0188] Specifically, the height H3 of the overlapping region OA may be 25% or less, 20% or less, or 15% or less of the thickness T of the bridge portion BR. For example, the height H3 of the overlapping region OA may be 5% to 25%, 10% to 20%, or 15% to 18%.

[0189] If the height H3 of the overlapping region OA is less than 5% of the thickness T of the bridge portion BR, the first groove G1 and the second groove G2 may be connected during the process of forming the first groove G1 and the second groove G2. This may result in a hole being formed in the cutting region CA. This may reduce the strength of the bridge portion BR. This may result in the bridge portion BR being cut when handling the elastic member module.

[0190] Furthermore, if the height H3 of the overlapping region OA exceeds 25% of the thickness T of the bridge portion BR, the area remaining unetched by the first groove G1 and the second groove G2 increases. This requires a large force when cutting the bridge portion BR. Therefore, the elastic member 100 is not easily separated by the cutting area.

[0191] The pitch P of the first groove G1 and the second groove G2 may be smaller than the thickness T of the bridge portion BR.

[0192] Specifically, the pitch P of the first grooves G1 and the second grooves G2 may be 25% or less, 20% or less, or 15% or less of the thickness T of the bridge portion BR. For example, the pitch P of the first grooves G1 and the second grooves G2 may be 10% to 25%, or 15% to 20%.

[0193] If the pitch P of the first groove G1 and the second groove G2 is less than 10% of the thickness T of the bridge portion BR, the first groove G1 and the second groove G2 may be connected during the process of forming the first groove G1 and the second groove G2. This may result in a hole being formed in the cutting area CA. This may reduce the strength of the bridge portion BR. This may result in the bridge portion BR being cut when handling the elastic member module.

[0194] Furthermore, if the pitch P of the first groove G1 and the second groove G2 exceeds 25% of the thickness T of the bridge portion BR, the height of the overlapping region OA can be increased. This increases the amount of bridge remaining in the overlapping region OA. This requires a large force to cut the bridge portion BR. Therefore, the elastic member 100 is not easily separated by the cutting region.

[0195] 14, the bridge portion BR is cut in the cutting area CA. Specifically, the bridge portion BR is cut in one area of ​​the cutting area CA. More specifically, the bridge portion BR is cut in an overlap area OA of the cutting area CA.

[0196] That is, the bridge portion BR can be cut at a cutting area having a small height.

[0197] The elastic member module according to the embodiment has improved reliability. Specifically, the bridge portion includes a plurality of overlapping grooves. Specifically, the bridge portion includes a first groove and a second groove formed on both sides of the bridge portion, respectively. Furthermore, the first groove and the second groove have a set height and width.

[0198] Therefore, the width and height of the first groove and the second groove may be reduced. A tensile force is applied when forming the pattern unit using the roll-to-roll process. The tensile force can be prevented from causing the bridge portion to break in the area where the first groove and the second groove are formed.

[0199] Furthermore, when the first groove and the second groove are formed, it is possible to prevent holes from being formed in the bridge portion due to process errors, thereby preventing defects in the elastic member module.

[0200] In addition, the elastic member and the frame can be easily separated. Specifically, the bridge portion includes a plurality of grooves that overlap each other. The plurality of grooves form an overlapping region. Thus, the bridge portion includes an overlapping region having a predetermined height.

[0201] Therefore, even if the height and width of the first groove and the second groove are reduced, the bridge portion is easily cut by the overlapping region, so that the elastic member and the frame can be easily separated.

[0202] 15 and 16, the elastic member 100 may include a first region 1A that is a folding region and a second region 2A that is an unfolding region.

[0203] 15, the elastic member 100 includes a plurality of pattern portions PA. For example, the plurality of pattern portions PA are formed by a roll-to-roll process. As described above, the bridge portion includes a first groove, a second groove, and an overlapping region having a predetermined size. Therefore, separation between the elastic member and the frame can be prevented when forming the pattern portions on the elastic member.

[0204] The elastic member 100 may include a first pattern portion PA1 disposed in the first region 1A.

[0205] 16, the elastic member 100 may further include a second pattern portion PA2. In particular, the elastic member 100 may further include a second pattern portion PA2 disposed in the second region 2A.

[0206] The elastic member 100 includes a plurality of protrusions PR.

[0207] The protrusion PR is disposed in the second region 2 A. Specifically, the protrusion PR protrudes from the edge of the second region 2 A of the elastic member.

[0208] The protrusions PR are formed by separating the elastic member 100 and the frame 200. That is, the protrusions PR may be a part of the bridge portion. Thus, the protrusions PR are formed integrally with the elastic member 100.

[0209] The protrusions PR can adjust the position of the elastic member 100. In particular, when the elastic member 100 is applied to the display device 10, the position of the elastic member 100 can be controlled by the protrusions PR. That is, the elastic member 100 can be aligned by the protrusions PR. That is, the protrusions PR can be alignment marks.

[0210] Therefore, the elastic member 100 does not require a separate alignment mark, which can improve the process efficiency of manufacturing the elastic member and prevent the non-effective area of ​​the elastic member from increasing due to the alignment mark.

[0211] The outer surface OS1 of the elastic member and the outer surface OS2 of the protrusion PR may have different properties.

[0212] Specifically, the outer surface OS1 of the elastic member and the outer surface OS2 of the protrusion PR may have different surface roughnesses. For example, the surface roughness of the outer surface OS2 of the protrusion PR may be greater than the surface roughness of the outer surface OS1 of the elastic member. The outer surface OS2 of the protrusion PR is the region where the bridge portion is cut. Therefore, the surface roughness of the outer surface OS2 of the protrusion PR may be greater than the surface roughness of the outer surface OS1 of the elastic member. However, embodiments are not limited thereto. The surface roughness of the outer surface OS2 of the protrusion PR may be less than the surface roughness of the outer surface OS1 of the elastic member.

[0213] Furthermore, the outer surface OS1 of the elastic member and the outer surface OS2 of the protrusion PR may have different shapes. For example, the outer surface OS1 of the elastic member and the outer surface OS2 of the protrusion PR may have different curvatures.

[0214] Specifically, the curvature of the outer surface OS2 of the protrusion PR may be greater than the curvature of the outer surface OS1 of the elastic member. For example, the outer surface OS2 of the protrusion PR may be formed in a curved shape. Furthermore, the outer surface OS1 of the elastic member may be formed in a flat shape. Alternatively, the outer surface OS2 of the protrusion PR may be formed in a curved shape with a large curvature. Furthermore, the outer surface OS1 of the elastic member may be formed in a curved shape with a small curvature.

[0215] The inclination angle of the outer surface OS1 of the elastic member may be different from the inclination angle of the outer surface OS2 of the protrusion PR. For example, the inclination angle of the outer surface OS1 of the elastic member may be larger than the inclination angle of the outer surface OS2 of the protrusion PR.

[0216] The outer surface OS2 of the protrusion PR is the region where the bridge portion is cut off. Therefore, the curvature or inclination angle of the outer surface OS2 of the protrusion PR may be larger than the curvature or inclination angle of the outer surface OS1 of the elastic member.

[0217] This allows the position of the protrusion to be easily confirmed. The protrusions may have different sizes. Small protrusions may be difficult to distinguish from the outer surface of the edge of the elastic member.

[0218] Therefore, the outer surface OS1 of the elastic member and the outer surface OS2 of the protrusion PR are formed to have different surface roughness or shapes. Therefore, even if the size of the protrusion is reduced, the position of the protrusion can be easily confirmed. Therefore, the position of the elastic member is easily aligned by the protrusion.

[0219] Elastic members according to other embodiments will be described below with reference to Figures 17 to 25. Descriptions that are the same as or similar to the above-described embodiments will be omitted.

[0220] FIG. 17 is a diagram showing a top view of an elastic member according to an embodiment.

[0221] The elastic member 100 includes a plurality of the protrusions PR. Specifically, the plurality of protrusions PR are arranged on an edge portion OL of the elastic member 100. The protrusions PR protrude outward from the edge portion OL.

[0222] The protrusion PR is formed by separating the elastic member 100 and the frame 200 .

[0223] Referring to FIG. 18, the elastic member 100 is coupled to the frame 200 before being applied to a display device.

[0224] In detail, the elastic member 100 and the frame 200 are connected by the bridge portion BR while being spaced apart by a hole H. The elastic member 100 and the frame 200 are separated by a cut region CL of the bridge portion BR.

[0225] The protrusions PR are formed by the remaining bridge portions.

[0226] The protrusion PR is spaced apart from an end of the first region 1A. Specifically, the protrusion PR is spaced apart in the second direction 2D from the outermost first pattern portion PA1. Specifically, the protrusion PR is spaced apart in the second direction 2D from the outermost hinge portion HN.

[0227] The distance G between the protrusion closest to the outermost first pattern portion PA1 and the outermost first pattern portion PA1 has a predetermined size, i.e., the distance G between the protrusion closest to the outermost hinge portion HN and the outermost hinge portion HN has a predetermined size.

[0228] The distance G may be greater than 0. That is, the protrusion does not contact the first pattern portion or the hinge portion. The distance G may be 5 mm or less. That is, the distance G may be greater than 0 and 5 mm.

[0229] When the distance G satisfies the range, deformation of the pattern portion is reduced. That is, the deformation of the spacing of the first pattern portion PA1 can be reduced by the distance G. Or, the deformation of the spacing of the second pattern portion PA2 can be reduced by the distance G. Or, the deformation of the spacing between the first pattern portion PA1 and the second pattern portion PA can be reduced by the distance G. Or, the deformation of the spacing of the first pattern P1 can be reduced by the distance G. Or, the deformation of the spacing of the second pattern P2 can be reduced by the distance G. Or, the deformation of the width and length of the first pattern P1 can be reduced by the distance G. Or, the deformation of the width and length of the second pattern P2 can be reduced by the distance G of the protrusion.

[0230] Furthermore, if the distance G is out of the range, deformation of the pattern portion may increase. That is, if the distance G exceeds 5 mm, deformation of the interval between the first pattern portion PA1, the interval between the second pattern portion PA2, the interval between the first pattern portion PA1 and the second pattern portion PA, the interval between the first pattern P1, the interval between the second pattern P2, the width and length of the first pattern P1, or the width and length of the second pattern P2 may increase depending on the distance G.

[0231] Alternatively, the distance G may be greater than or equal to the spacing between the patterns P1 and P2 in the second direction 2D and less than or equal to three times the maximum length of the patterns. Alternatively, the distance G may be greater than or equal to the minimum width of the patterns P1 and P2 and less than or equal to twice the maximum length of the patterns. Alternatively, the distance G may be greater than or equal to the spacing between the patterns P1 and P2 in the second direction 2D and less than or equal to the maximum length of the patterns. Alternatively, the distance G may be greater than or equal to twice the spacing between the patterns P1 and P2 in the second direction 2D and less than or equal to ten times the spacing between the patterns in the second direction 2D. Alternatively, the distance G may be greater than or equal to the width of the protrusion PR.

[0232] The protrusions PR are formed by the bridge portions BR. The elastic member 100 and the frame 200 are connected by the bridge portions BR. Also, the sagging of the elastic member 100 is reduced by the bridge portions BR.

[0233] Specifically, when the elastic member module warps in one direction, the elastic member and the frame warp in the same direction. The area of ​​the elastic member is larger than the area of ​​the frame. Therefore, the elastic member may warp more than the frame. This may cause the first region of the elastic member to sag in one direction. As the sagging increases, the stress applied to the first region increases. Furthermore, deformation of the pattern portion and the pattern may occur.

[0234] Therefore, the bridge portion and the protrusion portion may be close to the outermost first pattern portion or the hinge portion by a set size, thereby reducing sagging of the first region. That is, when the first region sags, the bridge portion can serve to fix the first region.

[0235] In addition, stress generated when the elastic member module warps is effectively dispersed. That is, stress is generated when the elastic member module warps. The stress is transferred to the frame via the bridge portion. Since the stress is dispersed, stress concentration in one area of ​​the elastic member can be prevented. As a result, an increase in waviness on the surface of the elastic member can be prevented. As a result, the surface of the elastic member is flattened.

[0236] In addition, since the bridge portions and protrusions are arranged close to the outermost first pattern portion or hinge portion by a set size, the number of bridge portions and protrusions arranged on the edge of the elastic member in the first direction 1D can be increased.

[0237] The pattern is formed by a roll-to-roll process. As a result, the elastic member module is wound around a roller in a second direction. As a result, a tensile force may be generated in the second direction during the roll-to-roll process. The bridge portion may break due to the tensile force. If multiple bridge portions break, the bonding strength between the elastic member and the frame decreases. As a result, the elastic member may separate from the frame during the pattern forming process. As the number of bridge portions and protrusions increases, the area where the elastic member and the frame are connected increases. As a result, separation of the elastic member and the frame during the roll-to-roll process can be prevented.

[0238] 19 to 21 are diagrams for explaining deformation of the pattern depending on the position of the protrusion. Fig. 19 is a diagram when the distance G is 5 mm or less. (a) is a diagram of the inner folding surface. (b) is a diagram of the outer folding surface. Fig. 20 is a diagram when the distance G is more than 5 mm to 10 mm. (a) is a diagram of the inner folding surface. (b) is a diagram of the outer folding surface. Fig. 21 is a diagram when the distance G is more than 10 mm. (a) is a diagram of the inner folding surface. (b) is a diagram of the outer folding surface.

[0239] As shown in Figure 19, when the elastic material module warps, the protrusions PR cause less sagging of the first region. That is, the protrusions PR serve to fix the first region. Therefore, the sagging of the first region is reduced. Therefore, deformation of the pattern portion and the pattern is reduced.

[0240] 20, when the elastic material module warps, the first region sags more than in FIG. 19. That is, since the protrusion PR is positioned farther away from the first region, it is difficult for the protrusion PR to fix the first region, which can increase deformation of the pattern portion and the pattern.

[0241] 21, when the elastic material module warps, the sagging of the first region is greater than in FIGS. 19 and 20. That is, since the protrusion PR is positioned farther away from the first region, it is difficult for the protrusion PR to fix the first region, which can increase deformation of the pattern portion and the pattern.

[0242] Hereinafter, an elastic member according to another embodiment will be described with reference to FIG.

[0243] 22, the elastic member 100 includes the first protrusion PR1 and the second protrusion PR2. The first protrusion PR1 is the protrusion closest to the first region 1A. Alternatively, the first protrusion PR1 is the protrusion closest to the outermost first pattern portion PA1. Alternatively, the first protrusion PR1 is the protrusion closest to the outermost hinge portion HN. Furthermore, the second protrusion PR2 is a protrusion other than the first protrusion PR1.

[0244] The distance G between the first protrusion portion PR1 and the outermost first pattern portion PA1 or the distance G between the first protrusion portion PR1 and the outermost hinge portion HN may be greater than 0 mm and up to 5 mm.

[0245] The first protrusion PR1 and the second protrusion PR2 have different sizes. Specifically, the length L1-1 of the first protrusion PR1 may be different from the length L1-2 of the second protrusion PR2. Alternatively, the width W1-1 of the first protrusion PR1 may be different from the width W1-2 of the second protrusion PR2. Alternatively, the length L1-1 of the first protrusion PR1 may be different from the length L1-2 of the second protrusion PR2, and the width W1-1 of the first protrusion PR1 may be different from the width W1-2 of the second protrusion PR2. Alternatively, the area L1-1*W1-1 of the first protrusion PR1 may be different from the area L1-2*W1-2 of the second protrusion PR2.

[0246] Furthermore, the widths of the first protrusion PR1 and the second protrusion PR2 may be smaller than the length of the first pattern portion PA1 and larger than the width of the first pattern portion PA1. For example, the widths of the first protrusion PR1 and the second protrusion PR2 may be smaller than the length of the first pattern portion PA1 and larger than two or three times the width of the first pattern portion PA1.

[0247] If the width of the first protrusion PR1 and the second protrusion PR2 is greater than the length of the first pattern portion PA1, the folding of the elastic member may be impaired. Furthermore, during folding, the hinge portion adjacent to the first protrusion may be wider than the hinge portion adjacent to the folding axis due to the first protrusion having a wider width adjacent to the hinge portion. This may result in a change in the width of the hinge portion.

[0248] Furthermore, the width of the first protrusion PR1 and the second protrusion PR2 is smaller than the width of the first pattern portion PA1, and the protrusions may be torn off during the manufacturing process of the elastic member or during a folding test of the elastic member.

[0249] For example, the size of the first protrusion PR1 may be larger than the size of the second protrusion PR2. Specifically, the area of ​​the first protrusion PR1 may be larger than the area of ​​the second protrusion PR2. For example, when forming the bridge portion, the width or length of the bridge portion corresponding to the first protrusion PR1 may be formed larger than the width of the bridge portion corresponding to the second protrusion PR2. This allows the area of ​​the first protrusion PR1 to be larger than the area of ​​the second protrusion PR2 after the elastic member and the frame are separated.

[0250] Since the area of ​​the first protrusion PR1 is larger than the area of ​​the second protrusion PR2, sagging of the first region can be reduced. That is, since the area of ​​the first protrusion PR1 is increased, the fixing force of the first protrusion PR1 to fix the first region can be increased. Therefore, sagging of the first region can be reduced, and deformation of the pattern portion and the pattern can be reduced.

[0251] 23, the elastic member 100 includes a first protrusion PR1 and a second protrusion PR2. The first protrusion PR1 is a protrusion that is 5 mm or less away from the first region 1A. Alternatively, the first protrusion PR1 is a protrusion that is 5 mm or less away from the outermost first pattern portion PA1. Alternatively, the first protrusion PR1 is a protrusion DL that is 5 mm or less away from the outermost hinge portion HN. Furthermore, the second protrusion PR2 is a protrusion other than the first protrusion PR1.

[0252] The first protrusion PR1 includes a plurality of protrusions. For example, the first protrusion PR1 includes a 1-1 protrusion PR1-1 and a 1-2 protrusion PR1-2. Specifically, a plurality of protrusions may be arranged at a distance of 5 mm or less from the first region 1A, the outermost first pattern portion PA1, or the outermost hinge portion HN. FIG. 23 shows two protrusions. However, the embodiment is not limited thereto, and three or more protrusions may be arranged.

[0253] Since multiple protrusions are arranged at a distance of less than 5 mm from the first region 1A, the outermost first pattern portion PA1, or the outermost hinge portion HN, deformation of the spacing between the first pattern portions PA1, the spacing between the second pattern portions PA2, the spacing between the first pattern portions PA1 and the second pattern portions PA, the spacing between the first patterns P1, and the width and length of the second patterns P2 can be reduced.

[0254] In particular, the sagging of the first region may be reduced, that is, the fixing force of the protrusion is increased, so that the first region can be effectively fixed when the first region sags.

[0255] Furthermore, the plurality of protrusions may be arranged at different intervals. Specifically, the interval between the protrusions that are within 5 mm of the first region 1A, the outermost first pattern portion PA1, or the outermost hinge portion HN may be different from the interval between the protrusions that are more than 5 mm from the first region 1A, the outermost first pattern portion PA1, or the outermost hinge portion HN. Specifically, the interval between the protrusions that are within 5 mm of the first region 1A, the outermost first pattern portion PA1, or the outermost hinge portion HN may be smaller than the interval between the protrusions that are more than 5 mm from the first region 1A, the outermost first pattern portion PA1, or the outermost hinge portion HN.

[0256] For example, the distance D1 between the 1-1 protrusion PR1-1 and the 1-2 protrusion PR1-2 may be smaller than the distance D2 between the second protrusion PR2. Also, the distance D1 between the 1-1 protrusion PR1-1 and the 1-2 protrusion PR1-2 may be smaller than the distance D3 between the 1-2 protrusion PR1-2 and the second protrusion PR2.

[0257] That is, the spacing between the protrusions may increase with increasing distance from the first region 1A, the outermost first pattern portion PA1, or the outermost hinge portion HN, and may decrease with increasing distance from the first region 1A, the outermost first pattern portion PA1, or the outermost hinge portion HN.

[0258] This prevents the elastic member from being separated from the frame when a pattern is formed in a roll-to-roll process. Specifically, when a pattern portion is formed in the first region of the elastic member, an etching force is applied to the elastic member. This can cause the elastic member to be separated from the frame during the pattern formation process. Therefore, the distance between the bridge portion and the protrusion is reduced in the region adjacent to the region where the pattern portion is formed. This prevents the elastic member from being separated from the frame when a pattern is formed on the elastic member.

[0259] 24 and 25, the elastic member may include a plurality of pattern portions. Specifically, the first region 1A and the second region 2A may have pattern portions including a plurality of patterns disposed therein.

[0260] The protrusions PR include a first protrusion PR1 and a second protrusion PR2. The first protrusion PR1 is the protrusion closest to the first region 1A, the outermost first pattern portion PA1, or the outermost hinge portion HN. The second protrusion PR2 is a protrusion other than the first protrusion PR1.

[0261] The first protrusion portion PR1 may overlap the 2-1 region 2-1 A. Specifically, the first protrusion portion PR1 may overlap the 2-1 region 2-1 A in the first direction 1D.

[0262] Furthermore, the second protrusion PR2 does not have to overlap the 2-1 region 2-1A. Specifically, the second protrusion PR2 does not overlap the 2-1 region 2-1A in the first direction 1D. Since the first protrusion PR1 is disposed to overlap the 2-1 region 2-1A, the area of ​​the 2-1 region 2-1A can be aligned. For example, the area of ​​the 2-1 region 2-1A can be set based on the position of the first protrusion PR1. This prevents a decrease in the strength of the elastic member due to an increase in the area of ​​the 2-1 region 2-1A. Furthermore, a decrease in the area of ​​the 2-1 region 2-1A prevents the boundary between the first region and the second region from being visible.

[0263] Furthermore, since the first protrusion PR1 overlaps the second-1 region 2-1A, the areas of the second-1 region 2-1A can be made similar. Specifically, the areas of the second-1 region 2-1A disposed on the left and right sides of the first region can be controlled based on the position of the first protrusion PR1. This makes it possible to make the areas of the second-1 region 2-1A uniform. This prevents the opening ratio of the elastic member 100 from varying in one region of the elastic member. This prevents the elastic member from warping in one direction due to differences in strength of the elastic member.

[0264] 25, the distance ds1 between the first protrusions PR1 at both ends of the first region may be smaller than the distance between the other protrusions. Specifically, the distance ds1 between the first protrusions PR1 facing each other in the second direction 2D may be smaller than the distance ds2 between the first protrusions PR1 and the second protrusions PR2 facing each other in the second direction 2D. The distance ds1 between the first protrusions PR1 may be smaller than the distance ds3 between the second protrusions PR2 facing each other in the second direction 2D. This reduces sagging.

[0265] Furthermore, the first protrusion PR1 overlaps with the 2-1 region 2-1A in the first direction 1D. Specifically, the distance from the folding axis FAX to the second protrusion PR1 is smaller than the distance from the folding axis FAX to the outermost pattern of the 2-1 region 2-1A. Furthermore, the distance from the folding axis FAX to the second protrusion PR1 may be larger than the distance from the folding axis FAX to the outermost pattern of the first region 1A.

[0266] The edge region E of the elastic member may include a curved surface. The distance between the edge region E and the second protrusion PR2 that is closest to the edge region E in the first direction 1D may be smaller than the distance between the edge region E and the second protrusion PR2 that is closest to the edge region E in the second direction 2D. This prevents the edge region from sagging below the frame when folding the elastic member. This prevents wear on the edge region during a manufacturing process or a folding test of the elastic member.

[0267] Hereinafter, with reference to FIG. 26, a folding support including the elastic member according to the above-described embodiment will be described.

[0268] Referring to FIG. 26, the folding support may include an elastic member 100, a flattening layer 200, an adhesive layer 300, and a protective layer 400.

[0269] The planarization layer 200 is disposed on the elastic member 100 and serves to planarize the surface of the elastic member 100. As described above, the elastic member 100 has a plurality of pattern portions in the shape of holes or grooves, and the surface of the elastic member 100 may not be flat due to the pattern portions. Therefore, when a panel or the like is directly attached to the elastic member 100, the adhesive strength between the panel and the elastic member 100 may be reduced depending on the surface characteristics of the elastic member 100.

[0270] In this way, the flattening layer 200 can be disposed on the elastic member 100 to flatten the adhesive surface where the elastic member 100 adheres to the panel.

[0271] The planarization layer 200 may include a metal or a non-metal, particularly, a metal or a plastic.

[0272] The adhesive layer 300 may be disposed between the elastic member 100 and the planarization layer 200. The adhesive layer 300 may be disposed between the elastic member 100 and the planarization layer 200 to bond the elastic member 100 and the planarization layer 200 together.

[0273] For example, the adhesive layer 300 may include a pressure sensitive adhesive (PSA), but embodiments are not limited thereto.

[0274] The protective layer 400 may be disposed under the elastic member 100 .

[0275] The protective layer 400 may have a color, for example, the protective layer 400 may be formed in a black-based color.

[0276] The protective layer 400 may include metal particles, for example, copper particles, which may improve the thermal conductivity of the protective layer 400 and allow heat generated in the display device to be dissipated through the protective layer 400.

[0277] Hereinafter, a display device including the folding support according to the above-described embodiment will be described with reference to FIG.

[0278] Referring to FIG. 27, the display device 10 can include a folding support and a panel.

[0279] The display device 10 may include the folding support and a panel layer 600 disposed on the folding support and including a display panel and / or a touch panel.

[0280] A bonding layer 500 may be disposed between the elastic member 100 and the panel layer 600 , and the elastic member 100 and the panel layer 600 may be bonded to each other via the bonding layer 500 .

[0281] As described above, the adhesive surface of the elastic member 100 can be flattened by the flattening layer 200, so that the elastic member and the panel layer can be stably adhered to each other without being affected by steps.

[0282] The adhesive layer 500 between the elastic member 100 and the panel layer 600 may have different properties than the third layer 300 of the elastic member 100 .

[0283] In particular, the adhesive layer 500 may have a thickness smaller than that of the third layer 300. For example, the thickness of the adhesive layer 500 may be 5 μm to 15 μm.

[0284] FIG. 28 is a diagram for explaining an example in which the elastic member according to the embodiment is applied.

[0285] Referring to FIG. 28, the elastic member according to the embodiment may be applied to a flexible or foldable display device that displays a display.

[0286] For example, the elastic member according to the embodiment can be applied to flexible display devices such as mobile phones and tablets.

[0287] Such elastic members can be applied to flexible display devices such as mobile phones, tablets, etc. that are flexible, bendable, or foldable.

[0288] The elastic member is applied to flexible display devices such as mobile phones and tablets that are flexible, bent, or foldable, and can improve the folding reliability of display devices that are repeatedly folded and restored, thereby improving the reliability of the flexible display device.

[0289] The features, structures, effects, etc. described in the above-described embodiments are included in at least one embodiment of the present invention and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, etc. exemplified in each embodiment can be combined or modified in other embodiments by a person skilled in the art to which the embodiment belongs. Therefore, content related to such combinations and modifications should be interpreted as being included within the scope of the present invention.

[0290] Furthermore, although the above description has focused on the embodiments, these are merely examples and are not intended to limit the scope of the embodiments. Those skilled in the art will understand that various modifications and applications not exemplified above are possible within the scope of the essential characteristics of the embodiments. For example, each component specifically illustrated in the embodiments can be modified and implemented. Differences related to such modifications and applications should be construed as being included within the scope of the embodiments defined in the appended claims.

Claims

1. an elastic member and a frame; the elastic member and the frame are connected by a bridge portion; the elastic member includes a cut region; the cutting region includes a first recess, a second recess, and a junction between the first recess and the second recess; the first recess and the second recess are formed to be concave relative to an outer surface of the elastic member, The joint portion is connected to the bridge portion.

2. The elastic member module of claim 1 , wherein the width of the first recess and the second recess is 15% to 30% of the overall width of the cutting area.

3. The elastic member module according to claim 2, wherein the height of the first recess and the second recess is 20% to 40% of the width of the recess.

4. An elastic member including a first region and a second region, The elastic member has a first direction defined as a width direction of the elastic member and a second direction defined as a longitudinal direction of the elastic member, the elastic member includes a cut region; the cutting region includes a recess including a cutting surface, a first recess, and a second recess; the first recess and the second recess are formed to be concave relative to an outer surface of the elastic member, a first height from a bottom surface of the recess to an outer surface of the elastic member and a third height from the bottom surface of the recess to the cutting surface are defined; The third height is less than or equal to the first height.

5. The elastic member of claim 4 , wherein the cut region is located in the second region.

6. The elastic member according to claim 4 , wherein the surface roughness of the cut surface is greater than the surface roughness of the outer surface of the elastic member.

7. The elastic member according to claim 4 , wherein the cut surface includes a curved surface or an inclined surface.

8. The elastic member according to claim 4, wherein the width of the first recess and the second recess is 15% to 30% of the total width of the cutting region.

9. an elastic member and a frame; the elastic member and the frame are connected by a bridge portion, the bridge portion includes a cut region; the cutting region includes a first groove formed on one surface of the bridge portion and a second groove formed on the other surface opposite to the one surface of the bridge portion, the cutting region includes an overlapping region in which the first groove and the second groove partially overlap in the width direction of the elastic member, The height of the overlapping region is 5% to 25% of the thickness of the bridge portion.

10. An elastic member including a first region and a second region, The elastic member has a first direction, which is a width direction, and a second direction, which is a length direction, defined therein; the first region includes a plurality of first pattern units including a plurality of first patterns spaced apart in the first direction, and a plurality of second pattern units including a plurality of second patterns spaced apart in the first direction, the plurality of first pattern portions and the plurality of second pattern portions are alternately arranged, Among the plurality of first patterns, a first pattern disposed at an end in a first direction includes a hinge portion disposed to open one side end region, a plurality of protrusions disposed on an edge of the elastic member; An elastic member, wherein the distance between the protrusion among the plurality of protrusions that is closest to the outermost hinge portion and the outermost hinge portion is greater than 0 and up to 5 mm.

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