Support and flexible display device

Abstract

The embodiment of the present disclosure provides a support and a flexible display device, and belongs to the technical field of display. The support comprises a support body, the support body has a planar region, at least one first bending region and at least one second bending region. The at least one first bending region and the at least one second bending region intersect to form at least one bidirectional bending region, the bidirectional bending region has a plurality of sawtooth-shaped connection lines arranged along the extension direction of the first bending region, and the extension direction of the connection lines is the same as the extension direction of the second bending region. The region in the first bending region except the bidirectional bending region is a first unidirectional bending region, and the first unidirectional bending region has a first aperture pattern. The region in the second bending region except the bidirectional bending region is a second unidirectional bending region, and the second unidirectional bending region has a second aperture pattern. The planar region is the region of the support body except the first bending region and the second bending region. The support in the embodiment of the present disclosure can be folded in two directions.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a support member and a flexible display device. Background Technology

[0002] With the development of display technology, display devices are being used in an increasingly wide range of applications, among which flexible display devices are gaining popularity. Flexible display devices are characterized by their relative thinness and high flexibility, enabling them to be folded, rolled up, and used in various applications.

[0003] Currently, flexible display devices typically include a stacked support member and a flexible display panel. The support member includes a support body having a planar area, at least one first bending area, and at least one second bending area. The at least one first bending area and at least one second bending area intersect to form at least one bidirectional bending area. The planar area is the region on the support body excluding the at least one first bending area and the at least one second bending area. The area within the first bending area, excluding the bidirectional bending area, is a first unidirectional bending area, which has a first opening pattern. The area within the second bending area, excluding the bidirectional bending area, is a second unidirectional bending area, which has a second opening pattern. The bidirectional bending area has multiple opening areas. Summary of the Invention

[0004] This disclosure provides a support member and a flexible display device, enabling the support member to be folded in two directions. The technical solution is as follows:

[0005] On one hand, a support member is provided, the support member including a support body having a planar area, at least one first bending area, and at least one second bending area; the at least one first bending area and the at least one second bending area intersect to form at least one bidirectional bending area, the support body including multiple connecting lines located in the bidirectional bending area, the connecting lines being serrated, the multiple connecting lines being arranged along a first direction and extending along a second direction, the first direction being the extension direction of the first bending area, and the second direction being the extension direction of the second bending area; the area in the first bending area other than the bidirectional bending area is a first unidirectional bending area, the first unidirectional bending area having a first opening pattern; the area in the second bending area other than the bidirectional bending area is a second unidirectional bending area, the second unidirectional bending area having a second opening pattern; the planar area is the area on the support body other than the at least one first bending area and the at least one second bending area.

[0006] Optionally, the connecting line includes a plurality of sawtooth structures connected sequentially in the second direction, the sawtooth structures satisfying:

[0007]

[0008] Wherein, C is the linewidth of the sawtooth structure, and A is the maximum dimension of the sawtooth structure in the first direction.

[0009] Optionally, the serrated structure has a dimension of 0.5mm to 2mm in the first direction; the line width of the serrated structure is 0.05mm to 0.3mm; and the opening size of the serrated structure is 0.05mm to 1mm.

[0010] Optionally, the spacing between two adjacent connecting lines is 0.1 mm to 2 mm.

[0011] Optionally, the plurality of sawtooth structures have the same structure and size.

[0012] Optionally, in the first direction, the distance between two adjacent connecting lines near the center of the bidirectional bending region is greater than the distance between two adjacent connecting lines far from the center of the bidirectional bending region.

[0013] Optionally, in the second direction, the size of the sawtooth structure of any connecting line in the bidirectional bending region closer to the center of the bidirectional bending region in the first direction is greater than the size of the sawtooth structure farther from the center of the bidirectional bending region in the first direction.

[0014] Optionally, the plurality of connecting lines include adjacent first connecting lines and second connecting lines, the first connecting lines and the second connecting lines being arranged symmetrically about an axis of symmetry, the axis of symmetry being located between the first connecting lines and the second connecting lines, and the length direction of the axis of symmetry being the second direction.

[0015] Optionally, the support body further includes at least one third connecting line located in the bidirectional bending area, the third connecting line extending along the first direction, and the third connecting line connecting at least two adjacent connecting lines in the first direction.

[0016] Optionally, the third connecting line has multiple openings, the shape of which includes an elongated shape, a circle, or a rhombus.

[0017] Optionally, any one of the plurality of connecting lines includes a plurality of alternating first portions and a plurality of second portions; the number of serrated structures included in the first portion is less than the number of serrated structures included in the second portion, and the size of the serrated structure in the first portion in the first direction is greater than the size of the serrated structure in the second portion in the first direction; the plurality of first portions of the plurality of connecting lines are arranged in an array along the first direction and the second direction, and the plurality of second portions of the plurality of connecting lines are arranged in an array along the first direction and the second direction.

[0018] Optionally, the support body includes at least two bidirectional bending zones, the plurality of bidirectional bending zones are arranged along the first direction or the second direction, and the distance between two adjacent bidirectional bending zones is greater than or equal to 2 mm.

[0019] Optionally, the first opening pattern includes a plurality of first openings arranged in an array, the length direction of the first openings being the same as the first direction; the second opening pattern includes a plurality of second openings arranged in an array, the length direction of the second openings being the same as the second direction.

[0020] Optionally, the first unidirectional bending region includes a first transition region, which is located in the area of ​​the first unidirectional bending region close to the planar region in the second direction; the first transition region includes a plurality of third openings, the length direction of the plurality of third openings is the first direction, the length of the third openings is less than the length of the first openings, and among the plurality of third openings, the length of the third openings close to the planar region is less than the length of the third openings far from the planar region.

[0021] Optionally, the second unidirectional bending region includes a second transition region, which is located in the area of ​​the second unidirectional bending region close to the planar region in the first direction; the second transition region includes a plurality of fourth openings, the length direction of the plurality of fourth openings is the second direction, the length of each of the fourth openings is less than the length of the second opening, and among the plurality of fourth openings, the length of the fourth opening closer to the planar region is less than the length of the fourth opening farther from the planar region.

[0022] Optionally, in the first direction, there is one or more rows of the second opening between two adjacent connecting lines.

[0023] Optionally, the thickness of the support body is 0.05mm to 0.3mm.

[0024] Optionally, the support body is made of one of stainless steel, titanium alloy, aluminum alloy, carbon fiber composite board, or glass fiber composite board.

[0025] Optionally, the support further includes a first adhesive layer, a spacer layer, and a second adhesive layer, wherein the support body, the first adhesive layer, the spacer layer, and the second adhesive layer are stacked sequentially.

[0026] Optionally, the thickness of the first adhesive layer is 0.005 mm to 0.05 mm; the thickness of the second adhesive layer is 0.005 mm to 0.05 mm; and the thickness of the spacer layer is 0.005 mm to 0.2 mm.

[0027] Optionally, the first adhesive layer is made of acrylic pressure-sensitive adhesive or silicone pressure-sensitive adhesive; the second adhesive layer is made of acrylic pressure-sensitive adhesive or silicone pressure-sensitive adhesive.

[0028] Optionally, the spacer layer is made of one of stainless steel, copper, polyimide, polyethylene terephthalate, acrylic modified foam, polyurethane modified foam, or silicone modified foam.

[0029] On the other hand, a flexible display device is provided, the flexible display device including a flexible display panel, a third adhesive layer, a cover plate and any of the aforementioned support members, wherein the support members, the flexible display panel, the third adhesive layer and the cover plate are stacked in sequence.

[0030] The beneficial effects of the technical solution provided in this disclosure include at least the following:

[0031] The bidirectional bending zone allows bending in two directions. By setting multiple connecting lines in the bidirectional bending zone, and the connecting lines are serrated, a support member that can be folded in two directions is obtained. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of a supporting body structure provided in an embodiment of this disclosure;

[0034] Figure 2 This is a schematic diagram of another supporting body structure provided in an embodiment of this disclosure;

[0035] Figure 3 This is a schematic diagram of another supporting body structure provided in an embodiment of this disclosure;

[0036] Figure 4 This is a schematic diagram of the structure of a bidirectional bending region provided in an embodiment of this disclosure;

[0037] Figure 5 This is a schematic diagram of another bidirectional bending region provided in an embodiment of this disclosure;

[0038] Figure 6 This is a schematic diagram of another bidirectional bending region provided in an embodiment of this disclosure;

[0039] Figure 7 This is a schematic diagram of another bidirectional bending region provided in an embodiment of this disclosure;

[0040] Figure 8 This is a schematic diagram of another supporting body structure provided in an embodiment of this disclosure;

[0041] Figure 9 yes Figure 8 A magnified view of a portion of the image;

[0042] Figure 10 This is a schematic diagram of another supporting body structure provided in an embodiment of this disclosure;

[0043] Figure 11 yes Figure 10 A magnified view of a portion of the image;

[0044] Figure 12 This is a schematic diagram of another supporting body structure provided in an embodiment of this disclosure;

[0045] Figure 13 yes Figure 12 A magnified view of a portion of the image;

[0046] Figure 14 This is a schematic diagram of another supporting body structure provided in an embodiment of this disclosure;

[0047] Figure 15 This is a schematic diagram of another supporting body structure provided in an embodiment of this disclosure;

[0048] Figure 16 This is a schematic diagram of another supporting body structure provided in an embodiment of this disclosure;

[0049] Figure 17 This is a schematic diagram of the cross-sectional structure of a support member provided in an embodiment of this disclosure;

[0050] Figure 18 This is a schematic cross-sectional view of a flexible display device provided in an embodiment of this disclosure.

[0051] Legend:

[0052] 1. Supporting component; 2. Flexible display panel; 3. Third adhesive layer; 4. Cover plate

[0053] 10. Support body 20, first adhesive layer 30, spacer layer 40, second adhesive layer

[0054] x, first direction y, second direction m, first bending axis n, second bending axis

[0055] 13. Planar area

[0056] 11. First Bending Zone 111. First Transition Zone

[0057] 110, First unidirectional bending zone; 1101, First opening; 1102, Third opening.

[0058] 12. Second bending zone; 121. Second transition zone

[0059] 120, Second unidirectional bending zone; 1201, Second opening; 1202, Fourth opening.

[0060] 100. Bidirectional bending zone; 101. Connecting line; 106. Serrated structure.

[0061] 102. First connecting section; 103. Second connecting section

[0062] 104. Third connecting segment 105. Fourth connecting segment

[0063] 10101, Part One; 10102, Part Two

[0064] 1011, First connecting line; 1012, Second connecting line; 1013, Third connecting line

[0065] 10130, Opening of the third connecting wire Detailed Implementation

[0066] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0067] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” “third,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” “right,” “top,” and “bottom,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0068] In flexible display devices, a support member is provided on the back of the flexible display panel. The support member includes a stacked intermediate layer and a support body. The support body can be bent in both directions. The intermediate layer is used to connect the support body and the flexible display panel. This can improve the overall support, tensile strength and impact resistance of the flexible display device, while enabling the flexible display device to have multiple bending directions.

[0069] Figure 1 This is a schematic diagram of a supporting body structure provided in an embodiment of this disclosure. For example... Figure 1 As shown, the support body 10 has a planar region 13, at least one first bending region 11, and at least one second bending region 12. The at least one first bending region 11 and the at least one second bending region 12 intersect to form at least one bidirectional bending region 100. The planar region 13 is the area on the support body 10 other than the at least one first bending region 11 and the at least one second bending region 12. Figure 1 As shown, Figure 1 The embodiment shown is a support body 10 including a first bending area 11 and a second bending area 12, wherein the first bending area 11 and the second bending area 12 intersect to form a bidirectional bending area 100.

[0070] Figure 2 This is a schematic diagram of another supporting body structure provided in an embodiment of this disclosure. For example... Figure 2 As shown, the support body 10 includes two bidirectional bending regions 100, which are arranged along the first direction x.

[0071] Alternatively, the multiple bidirectional bending zones 100 can also be arranged along the second direction y. The design that allows the bidirectional bending zones 100 to be arranged along either the first direction x or the second direction y enables more folding and carrying configurations.

[0072] It should be noted that the support body 10 may also include multiple bidirectional bending regions 100, wherein some bidirectional bending regions 100 are arranged along the first direction x, and some bidirectional bending regions 100 are arranged along the second direction y. For example, the support body 10 includes two first bending regions 11 and two second bending regions 12, which intersect to form four bidirectional bending regions 100, and the four bidirectional bending regions 100 are arranged in an array.

[0073] Optionally, when the support body 10 has multiple bidirectional bending regions 100, the distance between two adjacent bidirectional bending regions 100 is greater than or equal to 2 mm. The two adjacent bidirectional bending regions 100 are respectively the first target bidirectional bending region 100 and the second target bidirectional bending region 100. If the distance between the first target bidirectional bending region 100 and the second target bidirectional bending region 100 is less than 2 mm, the interval between the second unidirectional bending region 120 connected to the first target bidirectional bending region 100 and the second unidirectional bending region 120 connected to the second target bidirectional bending region 100 is smaller. The bending stress of one of the second unidirectional bending regions 120 passing through its second bending axis will extend to adjacent areas through the display film layer (such as a flexible display panel) with a solid-layer structure on the support member 1, such as extending to another second unidirectional bending region 120, causing an increase in the bending stress of the other second unidirectional bending region 120 passing through its second bending axis. Furthermore, the first target bidirectional bending region 100 and the second target bidirectional bending region 100 are connected by a first unidirectional bending region 110. Compared with the planar region 13, the first unidirectional bending region 110 is relatively soft and will undergo slight deformation during bending deformation, which makes it easier for the bending stresses of the first target bidirectional bending region 100 and the second target bidirectional bending region 100 to affect each other.

[0074] The following explanation uses the example of a support body 10 having a first bending region 11 and a second bending region 12.

[0075] Figure 3 This is a schematic diagram of another supporting body structure provided in an embodiment of this disclosure. For example... Figure 3 As shown, the area in the first bending region 11 other than the bidirectional bending region 100 is the first unidirectional bending region 110, which has a first opening pattern. The area in the second bending region 12 other than the bidirectional bending region 100 is the second unidirectional bending region 120, which has a second opening pattern.

[0076] For the first bending region 11, the second bending region 12, and the bidirectional bending region 100 formed by the intersection of the first bending region 11 and the second bending region 12, the support body 10 has a first bending axis m and a second bending axis n. The first bending axis is parallel to the first direction x, and the second bending axis is parallel to the second direction y. Here, the first bending axis m and the second bending axis n refer to axes, and there are no actual physical axes. The support body 10 can be bent along the first bending axis and the second bending axis in the second direction y and the first direction x, respectively. Both the first bending axis and the second bending axis pass through the center of the first bending region 11, and the second bending axis is located between the two connecting lines 101, but does not pass through the connecting lines 101.

[0077] like Figure 3As shown in the present embodiment, the support body 10 includes a plurality of sawtooth-shaped connecting lines 101 located in the bidirectional bending region 100. The plurality of connecting lines 101 are arranged along the first direction x, and the extension direction of the connecting lines 101 is the same as the extension direction of the second bending region 12 (hereinafter referred to as the second direction y). The first direction x is the extension direction of the first bending region 11.

[0078] Since the first bending region 11 and the second bending region 12 intersect to form a bidirectional bending region, the first direction x and the second direction y intersect. Exemplarily, the first direction x and the second direction y are perpendicular. In other embodiments, the first direction x and the second direction y may also form an angle other than 90 degrees.

[0079] In this embodiment of the present disclosure, the connecting line 101 includes a plurality of sawtooth structures 106 sequentially connected in the second direction y. Each sawtooth structure 106 includes at least one connecting segment.

[0080] like Figure 3 As shown, each sawtooth structure 106 includes a plurality of connecting segments connected in sequence: a first connecting segment 102, a second connecting segment 103, a third connecting segment 104 and a fourth connecting segment 105, wherein the length directions of the first connecting segment 102 and the third connecting segment 104 are parallel to the first direction x, and the length directions of the second connecting segment 103 and the fourth connecting segment 105 are parallel to the second direction y.

[0081] For example, such as Figure 3 As shown, the first connecting segment 102 has two straight sides arranged along the second direction y; the third connecting segment 104 has two straight sides arranged along the second direction y; the second connecting segment 103 has a straight side and an arc-shaped side arranged along the first direction x; and the fourth connecting segment 105 has an arc-shaped side and a straight side arranged along the first direction x. Of these four sides, the straight side of the second connecting segment 103 and the arc-shaped side of the fourth connecting segment 105 are closer to one end in the first direction x, while the arc-shaped side of the second connecting segment 103 and the straight side of the fourth connecting segment 105 are closer to the other end in the first direction x. Compared to a straight connection, this arc-shaped connection of the arc-shaped sides of the second connecting segment 103 and the fourth connecting segment 105 can evenly release stress during bending.

[0082] In this example, the first bending shaft m passes through a second connecting segment 103 or a fourth connecting segment 105 of a sawtooth structure 106 located in the middle in the second direction y.

[0083] In other possible implementations, each sawtooth structure 106 includes a plurality of connecting segments connected in sequence: a first connecting segment 102, a second connecting segment 103, a third connecting segment 104, and a fourth connecting segment 105. The first connecting segment 102 and the third connecting segment 104 are connected to... Figure 3 The structures shown are identical, each having two straight sidewalls arranged along the second direction y. The second connecting segment 103 and the fourth connecting segment 105 are... Figure 3 The structures shown are different; the second connecting segment 103 has two straight sides arranged along the first direction x; the fourth connecting segment 105 has two straight sides arranged along the first direction x.

[0084] For example, see [link to previous article] Figure 3 The first opening pattern includes multiple elongated first openings 1101 arranged in an array, with the length direction of each first opening 1101 being the same as the first direction x. When the support body 10 bends in the second direction y (i.e., bends along the first bending axis m), the multiple first openings 1101 can effectively reduce the bending stress, which is more conducive to the bending of the support body and avoids the support body from breaking during bending.

[0085] Optionally, the first opening 1101 can be rectangular, elliptical, or oval in shape. In some examples, the lengths of different first openings 1101 can be the same or different.

[0086] For example, the second opening pattern includes a plurality of elongated second openings 1201 arranged in an array, the length direction of the second openings 1201 being the same as the second direction y. Similarly, when the support body 10 bends in the first direction x (i.e., bends along the second bending axis n), the plurality of second openings 1201 can effectively reduce bending stress, making bending more favorable and preventing breakage during bending.

[0087] Optionally, the second opening 1201 can be rectangular, elliptical, or oval in shape. In some examples, the lengths of the different second openings 1201 can be the same or different.

[0088] Figure 4 This is a schematic diagram of a bidirectional bending region provided in an embodiment of this disclosure. Figure 4 As shown, the sawtooth structure 106 of the connecting line 101 satisfies:

[0089]

[0090] Wherein, α is a structural parameter of the sawtooth structure, which has no practical meaning and is calculated based on the linewidth of the sawtooth structure and the maximum dimension in the first direction x; C is the linewidth of the sawtooth structure, that is, the width of each connecting segment of the sawtooth structure in the direction perpendicular to its own extension, for example, the width of the first connecting segment 102 in the direction perpendicular to its extension; A is the maximum dimension of the sawtooth structure in the first direction x, that is, the length of the aforementioned first connecting segment 102 and the third connecting segment 104 in the first direction x. The length units of A and C in this formula are both millimeters (mm). The connecting line 101 that meets the size condition has been experimentally verified. After the support member 1 is dynamically bent 200,000 times along the first bending axis and the second bending axis respectively, there are no new defects and no cracking or damage of the support member. It has good folding reliability and meets the product requirements; if α > 462, it will lead to the problem of the support body breaking during the bending process. Some verification results are shown in Table 1.

[0091] Table 1 Verification results of the structural parameter α of the connecting line

[0092] A / mm C / mm α = C^3 * 10^5 / A^3 Folding reliability situation 1.2 0.08 29.62962963 OK 1.2 0.1 57.87037037 OK 1.2 0.12 100 OK 1.2 0.15 195.3125 OK 1.2 0.2 462.962963 NG

[0093] For example, the sawtooth structure 106 satisfies: A is 0.5mm to 2mm, C is 0.05mm to 0.3mm, and D is 0.05mm to 1mm. For instance, A is 0.5mm, 1mm, 1.2mm, 1.5mm, or 2mm; B is 0.1mm, 0.3mm, 0.5mm, 0.7mm, 1mm, 1.2mm, 1.4mm, 1.5mm, 1.6mm, 1.8mm, or 2mm; C is 0.05mm, 0.08mm, 0.1mm, 0.12mm, 0.15mm, 0.2mm, 0.25mm, or 0.3mm; and D is 0.05mm, 0.08mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, or 1mm.

[0094] Where D is the opening size of the sawtooth structure. This ensures that the bidirectional bending zone 100 will not break when it bends, and that the support member 1 has good bending ability and strong ability to recover flatness after bending.

[0095] Here, the opening size refers to the distance between two adjacent teeth in a serrated structure 106. For example... Figure 3In the first sawtooth structure, the dimensions of the unclosed portion formed by the sequential connection of the first connecting segment 102, the second connecting segment 103, and the third connecting segment 104 in the second direction y are either: or the dimensions of the unclosed portion formed by the sequential connection of the third connecting segment 104 and the fourth connecting segment 105 in the first sawtooth structure and the first connecting segment 102 in the second sawtooth structure. The first sawtooth structure and the second sawtooth structure are two adjacent sawtooth structures, and the fourth connecting segment 105 of the first sawtooth structure is connected to the first connecting segment 102 of the second sawtooth structure.

[0096] In one possible implementation, such as Figure 4 As shown, multiple sawtooth structures along the same connecting line 101 have the same structure and dimensions. Here, "same structure and dimensions" means that one sawtooth structure can be translated in the second direction y to obtain another sawtooth structure.

[0097] For example, such as Figure 4 As shown, within the bidirectional bending zone 100, the spacing between any two adjacent connecting lines 110 in the first direction x is equal.

[0098] For example, combining Figure 3 and Figure 4 In the first direction x, the spacing between any two adjacent connecting lines 110 can be an integer multiple of the spacing between two adjacent second openings 1201 (the distance between the center lines of the two second openings 1201) in the first direction x, such as 1, 2, or 3 times. That is, in the first direction x, there is one or more rows of second openings 1201 between two adjacent connecting lines 101.

[0099] Optionally, the spacing B between two adjacent connecting lines 101 is 0.1mm to 2mm.

[0100] Figure 5 This is a schematic diagram of another bidirectional bending region provided in an embodiment of this disclosure. For example... Figure 5 As shown, in the first direction x, within the bidirectional bending region 100, the distance between two adjacent connecting lines 101 near the center of the bidirectional bending region 100 is greater than the distance between two adjacent connecting lines 101 far from the center of the bidirectional bending region 100. Here, in the first direction x, the center of the bidirectional bending region 100 is the second bending axis n.

[0101] For example, B0 is the distance between the two adjacent connecting lines 101 closest to the second bending axis n, that is, the distance between the first connecting line 101 above and the first connecting line 101 below, starting from the second bending axis n. B1 is the distance between the first connecting line 101 above and the second connecting line 101 below, starting from the second bending axis n. The two connecting lines 101 corresponding to B1 are farther from the second bending axis n than the two corresponding to B0. B2 is the distance between the second connecting line 101 above and the third connecting line 101 below, starting from the second bending axis n. The two connecting lines 101 corresponding to B2 are farther from the second bending axis n than the two corresponding to B1. Wherein, B0 > B1 > B2.

[0102] The closer to the second bending axis n, the greater the bending stress. Setting a larger spacing between adjacent connecting lines helps to release stress.

[0103] In this embodiment of the disclosure, the connecting line 101 connects the bidirectional bending area 101 with the unidirectional bending areas on both sides of the first direction x or the second direction y.

[0104] In one possible implementation, the spacing between two adjacent connecting lines 101 is an integer multiple of the spacing between two corresponding adjacent second openings 1201 in the second unidirectional bending region 120 (the distance between the center lines of the two second openings 1021), for example, 1, 2, or 3 times. Here, "corresponding" means that the second openings 1201 and connecting lines 101 satisfy the following relationship: the projection of one or more second openings 1201 in the second unidirectional bending region 120 onto the first direction x (i.e., the projection of the second opening 1201 onto the first bending axis m) is located within the gap between two corresponding adjacent connecting lines 101.

[0105] For example, in the first direction x, within the bidirectional bending region 100, the distance between two adjacent connecting lines 101 near the center of the bidirectional bending region 100 is equal to p1 times the distance between the two second openings 1201, and the distance between two adjacent connecting lines 101 away from the center of the bidirectional bending region 100 is equal to p2 times the distance between the two second openings 1201. Here, p1 and p2 are both positive integers, and p1 is greater than p2.

[0106] In this embodiment of the present disclosure, when the second bending shaft n passes through the second unidirectional bending area 120, it passes through the second opening 1201, that is, the area with the least amount of solid part in the second unidirectional bending area 120; at the same time, when the second bending shaft n passes through the bidirectional bending area 100, it passes through the gap between two adjacent connecting lines 101, that is, the area with the least amount of solid part in the bidirectional bending area 100, which is more conducive to bending.

[0107] Figure 6 This is a schematic diagram of another bidirectional bending region provided in an embodiment of this disclosure. For example... Figure 6 As shown, for any connecting line 101 in the bidirectional bending region 100, in the second direction y, the dimension A1 of the sawtooth structure closer to the center of the bidirectional bending region 100 in the first direction is larger than the dimension A2 of the sawtooth structure farther from the center of the bidirectional bending region 100 in the first direction. Here, in the second direction y, the center of the bidirectional bending region 100 is at the first bending axis. The closer to the first bending axis, the greater the bending stress, and a larger-sized sawtooth structure in the first direction x is beneficial for stress release. At this time, in the second direction y, from one end of a connecting line 101 to the other, the dimension A of the sawtooth structure increases and then decreases, which is also called a cycle of dimension A. A connecting line 101 may have only one cycle of dimension A.

[0108] In other possible implementations, a connecting line 101 may have multiple variation periods of dimension A. For example, it may have two variation periods of dimension A, meaning that from one end of the connecting line 101 to the other, the dimension A of the sawtooth structure in the first direction can increase from small to small, then decrease, then increase again, and finally decrease. Alternatively, it may have three variation periods of dimension A, meaning that from one end of the connecting line 101 to the other, the dimension A of the sawtooth structure in the first direction can increase from small to small, then decrease, then increase again, then decrease again, then increase again, and finally decrease.

[0109] Figure 7 This is a schematic diagram of another bidirectional bending region provided in an embodiment of this disclosure. For example... Figure 7 As shown, the multiple connecting lines 101 include adjacent first connecting lines 1011 and second connecting lines 1012. The first connecting lines 1011 and second connecting lines 1012 are arranged symmetrically about the axis of symmetry O. The axis of symmetry O is located between the first connecting lines 1011 and second connecting lines 1012, and the length direction of the axis of symmetry O is the second direction y.

[0110] Figure 7 In the illustrated embodiment, the first connecting line 1011 and the second connecting line 1012 each have multiple opening regions in the first direction x. The multiple opening regions on the first connecting line 1011 near the second connecting line 1012 are respectively opposite to the multiple opening regions on the second connecting line 1012 near the first connecting line 1011. Here, in conjunction with... Figure 3 The open area refers to the unclosed section formed by the sequential connection of the first connecting segment 102, the second connecting segment 103, and the third connecting segment 104 within a sawtooth structure 106. That is, the second connecting line 1012 is offset relative to the first connecting line 1011 in the second direction y by half a cycle. Here, one cycle is one sawtooth structure.

[0111] In another possible implementation, the second connecting line 1012 is offset relative to the first connecting line 1011 in the second direction y by a quarter cycle.

[0112] Figure 8 This is a schematic diagram of another supporting body structure provided in an embodiment of this disclosure. Figure 9 yes Figure 8 A magnified view of a portion of the image. For example... Figure 8 , Figure 9 As shown, the bidirectional bending region 100 also includes at least one third connecting line 1013 located in the bidirectional bending region 100. The third connecting line 1013 extends along the first direction x and connects to multiple adjacent connecting lines 101 in the first direction.

[0113] In one possible implementation, the third connecting line 1013 has a plurality of elongated openings 10130, and the length direction of the openings is the first direction x. Optionally, the elongated openings 10130 can be rectangular, square, spindle-shaped, or elliptical, etc. In other possible implementations, the openings 10130 can be square, rhomboid, or circular, etc., and this disclosure does not limit this.

[0114] Optionally, such as Figure 9 As shown, the third connecting line 1013 connects all adjacent connecting lines 101 in the first direction x.

[0115] For example, the plurality of openings 10130 of the third connecting line 1013 are divided into multiple rows in the second direction y, such as Figure 8 , Figure 9 As shown, the plurality of openings 10130 of the third connecting line 1013 are divided into two rows in the second direction y. Alternatively, the plurality of openings 10130 of the third connecting line 1013 may also be in only one row in the second direction y, as shown below. Figure 10 , Figure 11 As shown. Figure 10 This is a schematic diagram of another supporting body structure provided in an embodiment of this disclosure. Figure 11 yes Figure 10 A magnified view of a portion of the image.

[0116] Figure 12 This is a schematic diagram of another supporting body structure provided in an embodiment of this disclosure. Figure 13 yes Figure 12 A magnified view of a portion of the image. For example... Figure 12 and Figure 13 As shown, any one of the plurality of connecting lines 101 includes a plurality of alternately connected first portions 10101 and a plurality of second portions 10102. The number of serrated structures contained in the first portion 10101 is less than the number of serrated structures contained in the second portion 10102. The dimension of the serrated structure in the first portion 10101 in the first direction x is greater than the dimension of the serrated structure in the second portion 10102 in the first direction x.

[0117] For example, such as Figure 13 As shown, the first part 10101 includes two serrated structures, and the second part 10102 includes four serrated structures. In other possible embodiments, the first part 10101 includes two serrated structures and the second part 10102 includes five serrated structures; the first part 10101 includes three serrated structures and the second part 10102 includes six serrated structures, etc.

[0118] In other possible implementations, the dimension of the serrated structure in the first part 10101 in the first direction x is smaller than the dimension of the serrated structure in the second part 10102 in the first direction x.

[0119] For example, the maximum dimension of the serrated structure in the first part 10101 in the first direction x is 1.8 mm, and the maximum dimension of the serrated structure in the second part 10102 in the first direction x is 1.6 mm. Alternatively, the maximum dimension of the serrated structure in the first part 10101 in the first direction x is 1.9 mm, and the maximum dimension of the serrated structure in the second part 10102 in the first direction x is 1.5 mm.

[0120] In the actual processing and molding process, because the multiple connecting lines arranged along the first direction x are relatively long, a third connecting line (e.g., ...) is set up to align the multiple connecting lines arranged along the first direction x. Figure 8 , Figure 9 (Example shown). Based on this, to further improve the bendability of the bidirectional bending zone 100, the portion of the third connecting line 1013 located between any two adjacent connecting lines 101 is removed to obtain... Figure 3 The embodiment shown. However, this process may result in local irregularities due to process deviations, leading to... Figure 12 and Figure 13 The example shown.

[0121] For example, such as Figure 12 and Figure 13As shown, multiple first portions 10101 of the multiple connecting lines 101 are arranged in an array along the first direction x and the second direction y, and multiple second portions 10102 of the multiple connecting lines 101 are arranged in an array along the first direction x and the second direction y. Experimental verification shows that the locally irregular bidirectional bending region 100 can also pass the bending test, indicating that the local irregular deviation has a relatively small impact on the folding reliability of the bidirectional bending region 100.

[0122] In one possible implementation, Figure 12 and Figure 13 The supporting body shown can be made of Figure 8 and Figure 9 The support body shown is manufactured through further processing, such as by using laser cutting. Figure 8 , Figure 9 In the support body 10 shown, the third connecting line 1013 is cut off in a portion of the area between the first connecting line 1011 and the second connecting line 1012.

[0123] Figure 14 This is a schematic diagram of another supporting body structure provided in an embodiment of this disclosure. For example... Figure 14 As shown, in one possible implementation, the bidirectional bending area 100 does not include a plurality of connecting lines 101, but is entirely filled with elastic material.

[0124] In another possible implementation, the bidirectional bending zone 100 does not include multiple connecting lines 101, but is partially filled with elastic material. Here, partial filling means that the initial support body 10 of the bidirectional bending zone 100 is a single-layer structure without openings, and multiple opening patterns are made on the initial support body 10 of the bidirectional bending zone 100. The opening patterns include, but are not limited to, circular holes, cross-shaped holes, square holes, etc., and then elastic material is filled into the openings.

[0125] The elastic material acts as a buffer when bending occurs in the bidirectional bending zone 100, which helps reduce cracking and other damage to the bidirectional bending zone 100 of the supporting body due to bending. Optionally, the elastic material is made of at least one of PU (Polyurethane), TPU (Thermoplastic Polyurethane), polyacrylate, rubber, and silicone rubber. Here, the elastic material made of PU is also referred to as PU foam.

[0126] Optionally, the thickness t1 of the filling elastic material is the same as or similar to the thickness t0 of the support body 10. Preferably, the thickness difference Δt = t1 - t0 should be less than or equal to ±0.05 mm. If the material thickness of the filling area is less than 0.05 mm than the thickness of the support body 10, it will result in severe depression in the filling area; if the material thickness of the filling area is greater than 0.05 mm than the thickness of the support body 10, it will result in a significant protrusion in the appearance of the filling area. Both of these situations are detrimental to the flatness of the support member 1, which in turn affects the flatness of other structures located on the support member 1 (such as the flexible display panel), and affects the display function of the flexible display device.

[0127] In another possible implementation, the bidirectional bending region 100 has no solid structure.

[0128] In another possible implementation, the sawtooth structure 106 consists of a first connecting segment and a second connecting segment connected together. The first connecting segment is arc-shaped and includes two arc-shaped sides arranged along a first direction x, with these two arc-shaped sides protruding to one side of the first direction x. The second connecting segment is also arc-shaped and includes two arc-shaped sides arranged along the first direction x, with these two arc-shaped sides protruding to the other side of the first direction x. None of these sides are located between adjacent connecting segments. The connecting line 101 formed by the sawtooth structure is wavy.

[0129] In another possible implementation, the sawtooth structure 106 consists of a first connecting segment and a second connecting segment. The first connecting segment has two relatively parallel straight sides, which form angles with both the first direction x and the second direction y. The second connecting segment also has two relatively parallel straight sides, which form angles with both the first direction x and the second direction y. These sides are not located between adjacent connecting segments. The connecting line 101 formed by the sawtooth structure is a continuous triangular zigzag line.

[0130] In one possible implementation, such as Figure 3 As shown, the first unidirectional bending region 110 includes a first transition region 111, which is located in the region of the first unidirectional bending region 110 near the plane region 13 in the second direction y. The first transition region 111 includes a plurality of third openings 1102, the length direction of which is the first direction x. The length of each of the third openings 1102 is less than the length of each of the first openings 1101, and among the third openings 1102, the length of the third opening 1102 near the plane region 13 is less than the length of the third opening 1102 away from the plane region 111. In the region of the first unidirectional bending region 110 other than the first transition region 111, the lengths of the first openings 1101 are equal.

[0131] The second unidirectional bending region 120 includes a second transition region 121, which is located in the region of the second unidirectional bending region 120 near the plane region 13 in the first direction x. The second transition region 121 includes a plurality of fourth openings 1202, the length direction of which is the second direction y. The length of each of the fourth openings 1202 is less than the length of each of the second openings 1201, and among the fourth openings 1202, the length of the fourth opening 1202 near the plane region 13 is less than the length of the fourth opening 1202 away from the plane region 111. In the region of the second unidirectional bending region 120 other than the first transition region 121, the lengths of the second openings 1201 are equal.

[0132] Figures 8 to 14 The support body shown also has the first transition region 111 and the second transition region 121 mentioned above, and these support bodies also have the structure of the third opening 1102 and the fourth opening 1202.

[0133] The bending stress is greater closer to the first bending axis, and the length of the third opening 1102, which is closer to the first bending axis, is longer, which helps to release the bending stress. Similarly, the bending stress is greater closer to the second bending axis, and the length of the fourth opening 1202, which is closer to the second bending axis, is longer, which also helps to release the bending stress. In other words, the design of the first transition zone 111 and the second transition zone 121 can effectively release stress, which is more conducive to bending and avoids breakage during bending.

[0134] In another possible implementation, such as Figure 15 As shown, Figure 15 This is a schematic diagram of another support body structure provided in this embodiment. The first unidirectional bending region 110 does not include the first transition region 111, the second unidirectional bending region 120 does not include the second transition region 121, and the bidirectional bending region 100 has no solid structure. This also allows the support body 10 to achieve bidirectional bending functionality.

[0135] In another possible implementation, such as Figure 16 As shown, Figure 16 This is a schematic diagram of another support body structure provided in this embodiment. The first unidirectional bending region 110 of the support body 10 includes a first transition region 111, the second unidirectional bending region 120 includes a second transition region 121, and the bidirectional bending region 100 has no solid structure. This also allows the support body 10 to achieve a bending function.

[0136] In another possible implementation, the first unidirectional bending region 110 of the support body 10 includes a first transition region 111, the second unidirectional bending region 120 includes a second transition region 121, and the bidirectional bending region 100 has multiple connecting lines arranged along the first direction x. The non-solid areas in the bidirectional bending region 100 (i.e., the areas between the connecting lines 101) are filled with elastic material. This also allows the support body 10 to achieve a bending function. See [link to relevant information on elastic materials] for details. Figure 14 The description of the medium elastic material is omitted here.

[0137] Figure 17 This is a schematic diagram of the cross-sectional structure of a support member provided in an embodiment of this disclosure. For example... Figure 17 As shown, the support member 1 also includes a first adhesive layer 20, a spacer layer 30 and a second adhesive layer 40, and the support body 10, the first adhesive layer 20, the spacer layer 30 and the second adhesive layer 40 are stacked in sequence.

[0138] An opening is made in the support body 10 to enable bending in two directions. The first adhesive layer 20 connects the support body 10 and the spacer layer 30. The spacer layer is a single layer structure, which helps to keep other structures on the support 1 (such as flexible display panels) flat. The second adhesive layer 40 connects the support 1 to other structures (such as flexible display panels).

[0139] For example, the second adhesive layer 40 is a solid layer structure, and the spacer layer 30 is a solid layer structure. The first adhesive layer 20 covers the planar area 13.

[0140] In one possible implementation, the first adhesive layer 20 also covers at least one first unidirectional bending region 110 or at least one second unidirectional bending region 120.

[0141] For example, the thickness of the support body 10 is 0.05mm to 0.3mm, such as 0.05mm, 0.1mm, 0.15mm, 0.2mm, 0.25mm, or 0.3mm. The thickness of the first adhesive layer 20 is 0.005mm to 0.05mm, such as 0.005mm, 0.01mm, 0.015mm, 0.02mm, 0.025mm, 0.03mm, 0.035mm, 0.04mm, 0.045mm, or 0.05mm. The thickness of the second adhesive layer 40 is 0.005mm to 0.05mm, such as 0.005mm, 0.01mm, 0.015mm, 0.02mm, 0.025mm, 0.03mm, 0.035mm, 0.04mm, 0.045mm, or 0.05mm. The thickness of the spacer layer 30 is 0.005mm to 0.2mm, for example, 0.005mm, 0.01mm, 0.03mm, 0.05mm, 0.08mm, 0.1mm, 0.12mm, 0.015mm or 0.2mm, etc.

[0142] Each layer within this thickness range will not affect the product thickness due to excessive thickness, nor will it result in poor support or adhesion due to excessive thinness, thus affecting the bending function of the flexible display device, including support member 1.

[0143] For example, the support body 10 is made of metal materials such as stainless steel, titanium alloy, and aluminum alloy, or fiber-reinforced rigid composite materials such as carbon fiber composite board and glass fiber composite board. These materials can be etched with perforated patterns to achieve bending and have sufficient rigidity to achieve the support function.

[0144] For example, the first adhesive layer 20 is made of acrylic pressure-sensitive adhesive or silicone pressure-sensitive adhesive. The second adhesive layer 40 is made of acrylic pressure-sensitive adhesive or silicone pressure-sensitive adhesive. These materials have adhesive properties to achieve bonding functionality.

[0145] For example, the spacer layer 30 is made of one of stainless steel, copper foil, PI (polyimide), PET (polyethylene terephthalate), acrylic modified foam, polyurethane modified foam, or silicone modified foam. Stainless steel and copper foil are flexible, ultra-thin materials. The flexibility of these materials allows the support component to have a bendable function.

[0146] Compared with solutions where the bidirectional bending zone is entirely filled with elastic material and solutions where the bidirectional bending zone has no solid structure, the solution provided in this disclosure, in which the bidirectional bending zone 100 includes multiple connecting lines 101, can provide the bidirectional bending zone 100 with better folding reliability, smaller creases, and better impact resistance.

[0147] Figure 18This is a schematic cross-sectional view of a flexible display device provided in an embodiment of this disclosure. Figure 18 As shown, the flexible display device includes a support member 1, a flexible display panel 2, a third adhesive layer 3, and a cover plate 4. The support member 1, flexible display panel 2, third adhesive layer 3, and cover plate 4 are stacked sequentially. The support member 1 supports the flexible display panel 2. The third adhesive layer 3 connects the cover plate 4 to the flexible display panel 2, and the cover plate 4 protects the flexible display panel 2.

[0148] The support member 1 can be any of the aforementioned support members. This disclosure does not limit the type of flexible display panel 2, including but not limited to OLED (Organic Light Emitting Diode) display panels, QLED (Quantum Dot Light Emitting Diode) display panels, etc.

[0149] Optionally, the third adhesive layer 3 is a single-layer structure. Optionally, the third adhesive layer 3 is made of pressure-sensitive adhesive or optical adhesive. These materials can achieve the bonding function without affecting the display function of the flexible display panel 2.

[0150] For example, the cover plate 4 is made of materials such as glass or plastic. These materials can provide protection for the flexible display panel 2.

[0151] For example, the flexible display device provided in this disclosure can be any foldable product or component with display function, such as a mobile phone, tablet computer, monitor, or laptop computer.

[0152] The flexible display device has the same effect as the aforementioned support member, which will not be described in detail here.

[0153] The above are merely optional embodiments of this disclosure and are not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A support member, characterized in that, The support member includes a support body, the support body having a planar area, at least one first bending area and at least one second bending area; The at least one first bending area and the at least one second bending area intersect to form at least one bidirectional bending area. The support body includes multiple connecting lines located in the bidirectional bending area. The connecting lines are serrated. The multiple connecting lines are arranged along a first direction and extend along a second direction. The first direction is the extension direction of the first bending area, and the second direction is the extension direction of the second bending area. The area in the first bending area other than the bidirectional bending area is a first unidirectional bending area. The first unidirectional bending area has a first opening pattern. The area in the second bending region other than the bidirectional bending region is the second unidirectional bending region, and the second unidirectional bending region has a second opening pattern. The planar area is the area on the support body other than the at least one first bending area and the at least one second bending area; The connecting line includes a plurality of sawtooth structures connected sequentially in the second direction, the sawtooth structures satisfying: Wherein, C is the linewidth of the sawtooth structure, and A is the maximum dimension of the sawtooth structure in the first direction.

2. The support member according to claim 1, characterized in that, The serrated structure has a dimension of 0.5mm to 2mm in the first direction; the line width of the serrated structure is 0.05mm to 0.3mm; and the opening size of the serrated structure is 0.05mm to 1mm.

3. The support member according to claim 1, characterized in that, The spacing between two adjacent connecting lines is 0.1mm to 2mm.

4. The support member according to claim 1, characterized in that, The connecting line includes a plurality of sawtooth structures connected sequentially in the second direction, and the plurality of sawtooth structures have the same structure and size.

5. The support member according to claim 1, characterized in that, In the first direction, in the bidirectional bending region, the distance between two adjacent connecting lines near the center of the bidirectional bending region is greater than the distance between two adjacent connecting lines far from the center of the bidirectional bending region.

6. The support member according to claim 1, characterized in that, The connecting line includes a plurality of sawtooth structures connected sequentially in the second direction. In the second direction, the size of the sawtooth structure of any connecting line in the bidirectional bending area closer to the center of the bidirectional bending area in the first direction is greater than the size of the sawtooth structure farther from the center of the bidirectional bending area in the first direction.

7. The support member according to claim 1, characterized in that, The plurality of connecting lines include an adjacent first connecting line and a second connecting line. The first connecting line and the second connecting line are arranged symmetrically about an axis of symmetry, which is located between the first connecting line and the second connecting line, and the length direction of the axis of symmetry is the second direction.

8. The support member according to any one of claims 1 to 7, characterized in that, The support body also includes at least one third connecting line located in the bidirectional bending area, the third connecting line extending along the first direction, and the third connecting line connecting at least two adjacent connecting lines in the first direction.

9. The support member according to claim 8, characterized in that, The third connecting line has multiple openings, and the shapes of the openings include elongated, circular, or rhomboid.

10. The support member according to any one of claims 1 to 7, characterized in that, Any of the multiple connecting lines includes multiple first parts and multiple second parts that are alternately connected; The first part contains fewer serrated structures than the second part contains, and the size of the serrated structure in the first part in the first direction is larger than the size of the serrated structure in the second part in the first direction. The plurality of first portions of the plurality of connecting lines are arranged in an array along the first direction and the second direction, and the plurality of second portions of the plurality of connecting lines are arranged in an array along the first direction and the second direction.

11. The support member according to any one of claims 1 to 7 and claim 9, characterized in that, The support body includes at least two bidirectional bending zones, which are arranged along the first direction or the second direction, and the distance between two adjacent bidirectional bending zones is greater than or equal to 2 mm.

12. The support member according to any one of claims 1 to 7 and claim 9, characterized in that, The first opening pattern includes a plurality of first openings arranged in an array, wherein the length direction of the first openings is the same as the first direction; The second opening pattern includes a plurality of second openings arranged in an array, wherein the length direction of the second openings is the same as the second direction.

13. The support member according to claim 12, characterized in that, The first unidirectional bending area includes a first transition area, which is located in the region of the first unidirectional bending area close to the planar area in the second direction; The first transition zone includes a plurality of third openings, the length direction of the plurality of third openings is the first direction, the length of the third openings is less than the length of the first openings, and among the plurality of third openings, the length of the third opening closer to the planar area is less than the length of the third opening farther from the planar area.

14. The support member according to claim 12, characterized in that, The second unidirectional bending region includes a second transition region, which is located in the area of ​​the second unidirectional bending region close to the planar region in the first direction; The second transition zone includes a plurality of fourth openings, the length direction of which is the second direction, the length of each fourth opening is less than the length of the second opening, and among the plurality of fourth openings, the length of the fourth opening closer to the planar area is less than the length of the fourth opening farther from the planar area.

15. The support member according to claim 12, characterized in that, In the first direction, there is one or more rows of the second opening between two adjacent connecting lines.

16. The support member according to any one of claims 1 to 7, 9, and 13 to 15, characterized in that, The thickness of the support body is 0.05mm to 0.3mm.

17. The support member according to claim 16, characterized in that, The support body is made of one of the following: stainless steel, titanium alloy, aluminum alloy, carbon fiber composite board, or glass fiber composite board.

18. The support member according to any one of claims 1 to 7, claim 9, claims 13 to 15, and claim 17, characterized in that, The support also includes a first adhesive layer, a spacer layer, and a second adhesive layer, with the support body, the first adhesive layer, the spacer layer, and the second adhesive layer stacked sequentially.

19. The support member according to claim 18, characterized in that, The thickness of the first adhesive layer is 0.005mm to 0.05mm; The thickness of the second adhesive layer is 0.005mm to 0.05mm; The thickness of the spacer layer is 0.005mm to 0.2mm.

20. The support member according to claim 18, characterized in that, The first adhesive layer is made of acrylic pressure-sensitive adhesive or silicone pressure-sensitive adhesive; The second adhesive layer is made of acrylic pressure-sensitive adhesive or silicone pressure-sensitive adhesive.

21. The support member according to claim 18, characterized in that, The spacer layer is made of one of the following: stainless steel, copper, polyimide, polyethylene terephthalate, acrylic modified foam, polyurethane modified foam, or silicone modified foam.

22. A flexible display device, characterized in that, The flexible display device includes a flexible display panel, a third adhesive layer, a cover plate, and a support member as described in any one of claims 1 to 21; The support member, the flexible display panel, the third adhesive layer, and the cover plate are stacked in sequence.

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