Supporting structure, flexible display module and flexible display device

Abstract

A supporting structure comprises a dustproof structure, a supporting part is attached to the side, away from a first bonding layer, of the dustproof structure, a gap between the supporting part and a supporting layer is eliminated, and the possibility that the edge of the supporting part generates stress concentration towards the side close to the first bonding layer is reduced; the condition that the supporting structure forms a bending die mark extending in the first direction on the edge of the supporting part is reduced or eliminated, and the display effect of the flexible display module is prevented from being affected. The utility model further provides a flexible display module comprising the supporting structure and a flexible display device comprising the flexible display module.

Description

Technical Field

[0001] The utility model relates to the technical field of display, and in particular to a support structure, a flexible display module and a flexible display device. Background Art

[0002] The foldable flexible display device has a larger display area, which enables it to have richer application scenarios and has received extensive attention from users. The market share of foldable flexible display devices has also been increasing year by year in recent years.

[0003] Since there is a gap between the support part of the support structure and the support layer, a bending imprint extending in the first direction will be formed at the edge of the support part during lamination, affecting the display effect of the flexible display module.

[0004] It should be noted that the information of the utility model in the above background art is only used to strengthen the understanding of the background of the present utility model, and therefore may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Utility Model

[0005] The purpose of the present utility model is to overcome the problem that because there is a gap between the support part of the support structure and the dust-proof structure, a bending imprint extending in the first direction will be formed at the position of the full-engraved pattern during lamination, affecting the display effect of the flexible display module, and to provide a support structure, a flexible display module and a flexible display device.

[0006] According to one aspect of the present utility model, a support structure is provided. The support structure includes a first adhesive layer, a support layer, a dust-proof structure, a first adhesive part and a support part. The support layer is arranged on one side of the first adhesive layer, and the support layer is provided with a full-engraved pattern extending in the first direction; the dust-proof structure is arranged on the side of the support layer away from the first adhesive layer, and the dust-proof structure covers the full-engraved pattern; the first adhesive parts are respectively arranged on both sides of the full-engraved pattern; the support part is arranged on the side of the first adhesive part away from the first adhesive layer, and the support part is in mutual fit with the side of the dust-proof structure away from the first adhesive layer.

[0007] In an embodiment of the present utility model, the dust-proof structure includes a first dust-proof layer, the first dust-proof layer is arranged on the side of the support layer away from the first adhesive layer, the side of the first adhesive part away from the first adhesive layer is flush with the side of the first dust-proof layer away from the first adhesive layer, and the support part is in mutual fit with the side of the first dust-proof layer away from the first adhesive layer.

[0008] In an embodiment of the present utility model, the dust-proof structure includes a first dust-proof layer and a second dust-proof layer. The first dust-proof layer is disposed on the side of the support layer away from the first adhesive layer, and the second dust-proof layer is disposed on the side of the first dust-proof layer away from the first adhesive layer. The side of the first adhesive portion away from the first adhesive layer is flush with the side of the second dust-proof layer away from the first adhesive layer, and the support portion is in contact with the side of the second dust-proof layer away from the first adhesive layer.

[0009] In an embodiment of the present utility model, the dust-proof structure includes a first dust-proof layer and a second dust-proof layer. The first dust-proof layer is disposed on the side of the support layer away from the first adhesive layer, and the second dust-proof layer is disposed on the side of the first dust-proof layer away from the first adhesive layer. The side of the second dust-proof layer away from the first adhesive layer is higher than the side of the first adhesive portion away from the first adhesive layer. The support portion is in contact with and presses the second dust-proof layer, so that the side of the second dust-proof layer away from the first adhesive layer is flush with the side of the first adhesive portion away from the first adhesive layer.

[0010] In an embodiment of the present utility model, the full engraving pattern includes multiple support bars. The multiple support bars extend along the first direction, and a connecting portion is provided between adjacent two support bars. The connecting portion connects the adjacent support bars together to form a support unit, and the connecting portions of adjacent two support units are arranged staggeredly along the first direction.

[0011] In an embodiment of the present utility model, the distance between two adjacent connecting portions of the same support unit along the first direction is greater than 5 mm and less than or equal to 10 mm.

[0012] In an embodiment of the present utility model, the width of the connecting portion along the first direction is greater than 0.2 mm and less than or equal to 0.3 mm.

[0013] In an embodiment of the present utility model, the dimension of the support bar along the second direction is less than or equal to 0.1 mm, and the second direction intersects with the first direction.

[0014] In an embodiment of the present utility model, the dimension of the connecting portion along the second direction is greater than 0.15 mm and less than or equal to 0.2 mm.

[0015] In an embodiment of the present utility model, the support layer is provided with at least two semi-engraved grooves. The at least two semi-engraved grooves are respectively located on the sides of two first adhesive portions away from the full engraving pattern along the second direction, and the second direction intersects with the first direction.

[0016] In an embodiment of the present utility model, a stress buffer groove is provided on the side of the first adhesive layer away from the support layer. The stress buffer groove extends along the first direction, and the orthographic projection of the stress buffer groove on the support layer overlaps with the pressed support bar.

[0017] In an embodiment of the present utility model, the dimension of the stress buffer groove in the second direction remains unchanged along the thickness direction of the first adhesive layer, and / or the dimension of the stress buffer groove in the second direction gradually increases or gradually decreases along the thickness direction of the first adhesive layer, and / or the dimension of the stress buffer groove in the second direction first gradually increases and then gradually decreases along the thickness direction of the first adhesive layer.

[0018] In an embodiment of the present utility model, the support structure further includes a first filling portion, the first filling portion is disposed on a side of the dust-proof structure away from the first adhesive layer, and a side of the first filling portion away from the first adhesive layer is flush with a side of the support portion away from the first adhesive layer.

[0019] In an embodiment of the present utility model, the support structure further includes a second filling portion, the second filling portion is disposed on a side of the semi-etching groove away from the first adhesive layer and fills into the semi-etching groove, and a side of the second filling portion away from the first adhesive layer is flush with a side of the support portion away from the first adhesive layer.

[0020] In an embodiment of the present utility model, the support structure further includes a buffer portion, the buffer portion is respectively located on a side of two second filling portions away from the full-etching pattern in the second direction, and the buffer portion is connected to the support layer through a second adhesive portion.

[0021] According to another aspect of the present utility model, there is provided a flexible display module, including a flexible display panel and the support structure provided by any one of the aspects of the present utility model, and the flexible display panel is bonded to a side of the first adhesive layer away from the support layer.

[0022] According to still another aspect of the present utility model, there is provided a flexible display device, including the flexible display module provided by another aspect of the present utility model.

[0023] The support structure of the present utility model includes a dust-proof structure, and the support portion is mutually attached to a side of the dust-proof structure away from the first adhesive layer, eliminating the gap between the support portion and the support layer, reducing the possibility of stress concentration at the edge of the support portion towards the side close to the first adhesive layer, reducing or eliminating the situation that the support structure forms a bending imprint extending in the first direction at the edge of the support portion, and avoiding affecting the display effect of the flexible display module.

[0024] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present utility model. Description of the Drawings

[0025] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present utility model, and are used together with the specification to explain the principles of the present utility model. Obviously, the accompanying drawings in the following description are only some embodiments of the present utility model, and those of ordinary skill in the art can obtain other accompanying drawings based on these drawings without creative efforts.

[0026] Figure 1 It is a schematic cross-sectional view of the support structure involved in the embodiment of the present utility model when there is a gap between the support part and the support layer.

[0027] Figure 2 It is a schematic cross-sectional view of the support structure involved in the embodiment of the present utility model when the dust-proof structure only includes the first dust-proof layer and the thickness of the first bonding part is equal to the thickness of the first bonding part.

[0028] Figure 3 It is a schematic cross-sectional view of the support structure involved in the embodiment of the present utility model when the dust-proof structure includes the first dust-proof layer and the second dust-proof layer, and the sum of the thicknesses of the first dust-proof layer and the second dust-proof layer is equal to the thickness of the first bonding part.

[0029] Figure 4 It is a schematic cross-sectional view of the support structure involved in the embodiment of the present utility model when the dust-proof structure includes the first dust-proof layer and the second dust-proof layer, and the sum of the thicknesses of the first dust-proof layer and the second dust-proof layer is greater than the thickness of the first bonding part.

[0030] Figure 5 It is a schematic plan view of the bending die printing on the flexible display panel involved in the embodiment of the present utility model.

[0031] Figure 6 It is a schematic cross-sectional view of the support structure involved in the embodiment of the present utility model when a stress buffer zone is provided in the first bonding layer.

[0032] Figure 7 It is a schematic stacking view of the dust-proof structure, the support layer and the first bonding layer involved in the embodiment of the present utility model when the first bonding layer includes a base material, a first adhesive layer and a second adhesive layer.

[0033] Figure 8 It is a schematic stacking view of the dust-proof structure, the support layer and the first bonding layer involved in the embodiment of the present utility model when the first bonding layer includes a base material, a first adhesive layer and a second adhesive layer, and two stress buffer grooves are provided in the second adhesive layer.

[0034] Figure 9 It is a partial schematic view of the first bonding layer involved in the embodiment of the present utility model when the cross-sectional shape of the stress buffer groove is rectangular.

[0035] Figure 10Schematic diagram of a partial view of the first adhesive layer according to an embodiment of the present invention when the cross-sectional shape of the stress buffer groove is a regular trapezoid or an inverted trapezoid.

[0036] Figure 11 Schematic diagram of a partial view of the first adhesive layer according to an embodiment of the present invention when the cross-sectional shape of the stress buffer groove is a drum shape.

[0037] Figure 12 Planar schematic diagram of the full-etch pattern according to an embodiment of the present invention.

[0038] Figure 13 Partial schematic diagram of the full-etch pattern according to an embodiment of the present invention.

[0039] Figure 14 Schematic diagram of the structure of the S1 water droplet state according to an embodiment of the present invention.

[0040] Figure 15 Schematic diagram of the structure of the S2 water droplet state according to an embodiment of the present invention.

[0041] Figure 16 Schematic diagram of the structure of the S3 water droplet state according to an embodiment of the present invention.

[0042] Figure 17 Schematic diagram of the structure of the S4 water droplet state according to an embodiment of the present invention.

[0043] Figure 18 Schematic diagram of the structure of the S5 water droplet state according to an embodiment of the present invention.

[0044] Figure 19 Schematic diagram of the structure of the S6 water droplet state according to an embodiment of the present invention.

[0045] Figure 20 Schematic diagram of the structure of the S7 water droplet state according to an embodiment of the present invention.

[0046] In the figure: 1, the first adhesive layer; 11, the substrate; 12, the first adhesive layer; 13, the second adhesive layer; 101, the stress buffer area; 102, the stress buffer groove; 2, the support layer; 21, the full-etch pattern; 211, the support unit; 2111, the support bar; 2112, the connecting part; 2113, the pattern unit; 22, the half-etch groove; 3, the dust-proof structure; 31, the first dust-proof layer; 32, the second dust-proof layer; 4, the support module; 41, the support part; 42, the first bonding part; 5, the first filling part; 6, the second filling part; 7, the buffer structure; 71, the buffer part; 72, the second bonding part; 8, the first protective film; 9, the second protective film; 100, the support structure; 200, the flexible display panel; 2001, the bending die impression. Detailed implementation manners

[0047] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this utility model will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals in the figures denote like or similar structures, and thus their detailed description will be omitted. In addition, the drawings are only schematic illustrations of the present utility model and are not necessarily drawn to scale.

[0048] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another component, these terms are used in this specification only for convenience, for example, according to the directions of the examples described in the accompanying drawings. It can be understood that if the device of the icon is turned upside down, the component described as "upper" will become the component described as "lower". When a structure is "on" another structure, it may mean that a structure is integrally formed on another structure, or that a structure is "directly" disposed on another structure, or that a structure is "indirectly" disposed on another structure through another structure.

[0049] The terms "a", "an", "the", "said" and "at least one" are used to indicate the existence of one or more elements / components / etc.; the terms "comprising" and "having" are used to mean an open inclusion and mean that there may be additional elements / components / etc. in addition to the listed elements / components / etc.; the terms "first", "second", "third", etc. are used only as labels and are not a limitation on the quantity of their objects.

[0050] As Figure 1 shown, the support structure includes a first adhesive layer 1, a support layer 2, a dust-proof structure 3 and a support module 4. The support module 4 includes a first adhesive portion 42 and a support portion 41. The support layer 2 is disposed on one side of the first adhesive layer 1. The support layer 2 is provided with a full-etching pattern 21 extending along the first direction x; the dust-proof structure 3 is disposed on the side of the support layer 2 away from the first adhesive layer 1, and the dust-proof structure 3 covers the full-etching pattern 21; the first adhesive portions 42 are respectively disposed on both sides of the dust-proof structure 3; the support portion 41 is disposed on the side of the first adhesive portion 42 away from the first adhesive layer 1.

[0051] Since there is a gap between the support portion 41 of the support structure and the support layer 2, a fitting imprint extending along the first direction x will be formed at the edge of the support portion 41 during fitting, which affects the display effect of the flexible display module. When the first protective film 8 is fitted, the roller applies a downward pressure to the support portion 41, and the edge of the support portion 41 is stressed downward, generating strain on the first adhesive layer 1, and finally forming a fitting imprint.

[0052] Based on this, the present utility model provides a support structure. As Figures 2 to 20 shown, the support structure includes a first adhesive layer 1, a support layer 2, a dust-proof structure 3, and a first bonding portion 42. The support layer 2 is disposed on one side of the first adhesive layer 1, and the support layer 2 is provided with a full-etch pattern 21 extending along the first direction x; the dust-proof structure 3 is disposed on the side of the support layer 2 away from the first adhesive layer 1, and the dust-proof structure 3 covers the full-etch pattern 21; the first bonding portions 42 are respectively disposed on both sides of the full-etch pattern 21; the support portion 41 is disposed on the side of the first bonding portion 42 away from the first adhesive layer 1, and the support portion 41 is in mutual contact with the side of the dust-proof structure 3 away from the first adhesive layer 1.

[0053] Extending the dust-proof structure 3 between the support portion 41 and the first bonding portion 42, such that the support portion 41 is in mutual contact with the side of the dust-proof structure 3 away from the first adhesive layer 1, reduces the possibility that the edge of the support portion 41 generates stress concentration toward the side close to the first adhesive layer 1, reduces or eliminates the situation where a fitting imprint extending along the first direction x is formed at the edge of the support portion 41 of the support structure, and avoids affecting the display effect of the flexible display module.

[0054] The support structure involved in the present utility model will be described in detail below in conjunction with specific embodiments.

[0055] As Figures 2 to 4 shown, the support structure includes a first adhesive layer 1 and a support layer 2. The support layer 2 is disposed on one side of the first adhesive layer 1, and the support layer 2 is provided with a full-etch pattern 21 extending along the first direction x. Etching to form the above-mentioned full-etch pattern 21 can largely reduce the concentrated stress during the folding process, thereby improving the bending performance of the support structure.

[0056] In order to prevent dust from entering the full-etch pattern 21 and affecting the peeling between the support layer 2 and the first adhesive layer 1. Usually, a dust-proof structure 3 is disposed on the side of the support layer 2 away from the first adhesive layer 1, and the dust-proof structure 3 covers the full-etch pattern 21. The dust-proof structure 3 may include a first dust-proof layer 31, and the first dust-proof layer 31 is disposed on the side of the support layer 2 away from the first adhesive layer 1. The dust-proof structure 3 may further include a second dust-proof layer 32, and the second dust-proof layer 32 is disposed on the side of the first dust-proof layer 31 away from the first adhesive layer 1.

[0057] When the flexible display device is in a bent state, the support structure usually needs to be in a water droplet shape. The support layer 2 is provided with two half-grooves 22, and the two half-grooves 22 are respectively located on both sides of the full-engraved pattern 21 along the second direction y, so that the support structure can be bent into a U-shaped state. A first bonding portion 42 is provided between the two half-grooves 22 and the full-engraved pattern 21, and a support portion 41 is provided on the side of the first bonding portion 42 away from the first bonding layer 1. When the flexible display device is bent, since the support portion 41 will squeeze the hinge connection portion, the two straight sides of the U-shaped flexible display device are recessed in the direction of approaching each other, forming a water droplet state. It should be noted that the hinge connection portion is used to connect the whole machine and the flexible display module.

[0058] The support structure further includes a first filling portion 5 and a second filling portion 6. The first filling portion 5 is provided on the side of the dust-proof structure 3 away from the first bonding layer 1, and the side of the first filling portion 5 away from the first bonding layer 1 is flush with the side of the support portion 41 away from the first bonding layer 1. The second filling portion 6 is provided on the side of the half-groove 22 away from the first bonding layer 1 and fills the half-groove 22, and the side of the second filling portion 6 away from the first bonding layer 1 is flush with the side of the support portion 41 away from the first bonding layer 1.

[0059] The support structure further includes a buffer structure 7. The buffer structure 7 includes a buffer portion 71 and a second bonding portion 72. The buffer portion 71 is respectively located on the side of the two second filling portions 6 away from the full-engraved pattern 21 along the second direction y, and the buffer portion 71 is connected to the support layer 2 through the second bonding portion 72. In this embodiment, the buffer portion 71 and the second bonding portion 72 are located at the edge of the support layer 2. A first protective film 8 can be provided on the side of the first bonding layer 1 away from the support layer 2, and a second protective film 9 can be provided on the side of the support portion 41 away from the first bonding layer 1.

[0060] As Figure 2 shown, when the dust-proof structure 3 only includes the first dust-proof layer 31, the thickness of the first bonding portion 42 can be thinned to be equal to the thickness of the first dust-proof layer 31, and the side of the first bonding portion 42 away from the first bonding layer 1 is flush with the side of the first dust-proof layer 31 away from the first bonding layer 1. For example, the thickness of the first bonding portion 42 is thinned from 30 μm to 10 μm. The first dust-proof layer 31 is extended between the support portion 41 and the first bonding portion 42, so that the support portion 41 is in contact with the side of the first dust-proof layer 31 away from the first bonding layer 1, thereby eliminating the gap between the support portion 41 and the support layer 2.

[0061] As Figure 3As shown, when the dust-proof structure 3 includes a first dust-proof layer 31 and a second dust-proof layer 32, the side of the second dust-proof layer 32 away from the first adhesive layer 1 is set to be flush with the side of the first adhesive portion 42 away from the first adhesive layer 1. For example, the thickness of the second dust-proof layer 32 is set to H1, and H1 can be 14 μm. The second dust-proof layer 32 can be extended between the support portion 41 and the first adhesive portion 42, so that the support portion 41 is in contact with the side of the first dust-proof layer 31 away from the first adhesive layer 1, thereby eliminating the gap between the support portion 41 and the support layer 2.

[0062] As Figure 4 shown, when the dust-proof structure 3 includes a first dust-proof layer 31 and a second dust-proof layer 32, the side of the second dust-proof layer 32 away from the first adhesive layer 1 can also be higher than the side of the first adhesive portion 42 away from the first adhesive layer 1. For example, the thickness of the second dust-proof layer 32 is set to H2, and H2 can be 25 μm. The support portion 41 is in contact with and presses the second dust-proof layer 32, so that the side of the second dust-proof layer 32 away from the first adhesive layer 1 is flush with the side of the first adhesive portion 42 away from the first adhesive layer 1. An interference fit is formed between the support portion 41 and the dust-proof structure 3, and the interference amount is 10 - 20 μm. In this embodiment, the interference amount can be 10 mm, 11 mm, 13 mm, 17 mm, or 20 mm.

[0063] When installing the support structure on the flexible display device, usually the first protective film 8 is torn off, and the flexible display panel is directly bonded to the first adhesive layer 1. When the flexible display device is bent, since the support portion 41 will squeeze the hinge connection portion, a bending imprint 2001 will be formed on the flexible display panel 200, as Figure 5 shown. Therefore, an attempt is made to remove the hinge connection portion of the flexible display device, so that the bending area is in a free water droplet state under the static bending state. Under this state, a static bending test is performed on the flexible display device, and the situation of the bending imprint in the bending area of the flexible display panel after unfolding is improved.

[0064] As Figure 6 shown, it is considered to provide a stress buffer zone 101 on the first adhesive layer 1, and the first adhesive layer 1 is thinned or removed in the stress buffer zone 101. The orthographic projection of the stress buffer zone 101 on the support layer 2 overlaps with the full etching pattern 21, so that the bending area is in a free water droplet state under the static bending state, achieving the effect of improving the situation of the bending imprint in the bending area.

[0065] As Figure 7 shown, the first adhesive layer 1 includes a base material 11, a first adhesive layer 12, and a second adhesive layer 13. The first adhesive layer 12 is located on the side of the base material 11 close to the support layer 2, and the second adhesive layer 13 is located on the side of the base material 11 away from the support layer 2. As Figures 7 to 10As shown in the figure, the second adhesive layer 13 is provided with two stress buffer grooves 102. The two stress buffer grooves 102 extend along the first direction x, and the two stress buffer grooves 102 are arranged at intervals along the second direction y. The second direction y is perpendicular to the first direction x and perpendicular to the third direction z. The third direction z is the thickness direction of the first adhesive layer 1.

[0066] The depth of the stress buffer groove 102 is less than the thickness of the first adhesive layer 1. The depth of the stress buffer groove 102 can penetrate the second adhesive layer 13, or can penetrate both the second adhesive layer 13 and the substrate 11 at the same time, or can also remove part of the first adhesive layer 12. In this embodiment, the depth of the stress buffer groove 102 can be equal to the thickness of the second adhesive layer 13 to avoid affecting the structures of the substrate 11 and the first adhesive layer 12 due to the stress buffer groove 102 and weakening the connection strength between the first adhesive layer 1 and the support layer 2. Of course, the depth of the stress buffer groove 102 can also be less than the thickness of the second adhesive layer 13, that is, part of the second adhesive layer 13 is removed. The orthographic projection of the stress buffer groove 102 on the first protective film 8 overlaps with the bending die mark.

[0067] As Figures 8 to 11 shown in the figure, it is considered to set the stress buffer groove 102 only at the position where the bending die mark is generated. First, the position of the bending die mark is positioned. The number of bending die marks is at least one pair. Each pair of bending die marks includes two bending die marks. The positions where the two bending die marks of each pair of bending die marks are generated are symmetrically arranged along the first direction x with respect to the midline of the full engraving pattern 21, approximately at the position of the 8th - 12th support bars 2111. For example: the position where one bending die mark is generated is located at the position of the 10th support bar 2111 from left to right, and the position where the other bending die mark is generated is also located at the position of the 10th support bar 2111 from right to left. The support bar 2111 at the position where the bending die mark is generated is the support bar subjected to extrusion. It should be noted that this support bar is extruded by the hinge connection part. The simulation of the maximum strain of the support layer 2 is carried out by using simulation software, and the simulation result matches the position where the bending die mark is generated. Thus, the accuracy of the simulation is verified.

[0068] As Figure 9 shown in the figure, the dimension of the stress buffer groove 102 along the second direction y remains unchanged along the third direction z, that is, the cross-sectional shape of the stress buffer groove 102 is a rectangle. As Figure 10 shown in the figure, the dimension of the stress buffer groove 102 along the second direction y gradually increases along the direction away from the support layer 2, that is, the cross-sectional shape of the stress buffer groove 102 is a regular trapezoid. The dimension of the stress buffer groove 102 along the second direction y can also gradually decrease along the direction away from the support layer 2, that is, the cross-sectional shape of the stress buffer groove 102 is an inverted trapezoid. As Figure 11 shown in the figure, the dimension of the stress buffer groove 102 along the second direction y first gradually increases and then gradually decreases along the direction away from the support layer 2, that is, the cross-sectional shape of the stress buffer groove 102 is a drum shape.

[0069] As shown Figure 12 in the figure, the full-etch pattern 21 includes multiple support bars 2111. The multiple support bars 2111 extend along the first direction x. A connecting portion 2112 is provided between two adjacent support bars 2111. The connecting portion 2112 connects the adjacent support bars 2111 together to form a support unit 211. Each two connecting portions 2112 and the support bars 2111 between the two connecting portions 2112 enclose a pattern unit 2113. Two adjacent pattern units 2113 along the first direction x share a connecting portion 2112. Multiple pattern units 2113 form a support unit 211.

[0070] The connecting portions 2112 of two adjacent support units 211 are arranged staggered along the bending direction. Multiple support units 211 are sequentially numbered 1...n along the second direction y. The connecting portions 2112 of the support units 211 in the odd rows are located on the same straight line along the second direction y, and the connecting portions 2112 of the support units 211 in the even rows are located on the same straight line along the second direction y. The dimension of the pattern unit 2113 along the second direction y gradually increases from the middle to both ends of the pattern unit 2113 in the first direction x. For two adjacent pattern units 2113 along the second direction y, the connecting portion 2112 of one pattern unit 2113 is located in the middle of the other pattern unit 2113 along the first direction x.

[0071] Since the full-etch pattern 21 also has a great influence on the stress in the bending area, the full-etch pattern 21 of the support layer 2 can be considered to be adjusted to achieve the effect of improving the bending imprint on the flexible display panel. The support structure in the free water droplet state is simulated. Taking the maximum strain simulated by the full-etch pattern 21 as the judgment basis, the full-etch pattern 21 of the support layer 2 is adjusted according to the optimization trend of stress reduction in the bending area.

[0072] As shown Figure 13 in the figure, the distance between two adjacent connecting portions 2112 along the first direction x is A, the width of the connecting portion 2112 along the first direction x is B, the dimension of the support bar 2111 along the second direction y is C. The dimension of the connecting portion 2112 along the second direction y is D.

[0073] As shown Figure 14 in the figure, the S1 water droplet state is the state where the support structure 100 in Figure 1 is adopted, the maximum strain point during the bending of the flexible display device is O1. The bending angle of the support structure 100 is 10.9°, the maximum strain of the support layer 2 is -7.7%, and the maximum strain of the first adhesive layer 1 is -24.8%. Adopting Figure 1The middle support structure 100, when the hinge connection part of the flexible display device is removed, the bent state is the free water droplet state. The bending angle of the support structure 100 is 12.6°, the maximum strain of the support layer 2 is -6%, and the maximum strain of the first adhesive layer 1 is -22.8%.

[0074] As Figure 15 shown, the S2 water droplet state is the state where when the middle support structure 100 is adopted, the maximum strain point during the bending of the flexible display device is O2. The maximum strain of the support layer 2 is -3.3%, and the maximum strain of the first adhesive layer 1 is -11.4%. As Figure 5 shown, the S3 water droplet state is the state where when the middle support structure 100 is adopted, the maximum strain point during the bending of the flexible display device is O3. The maximum strain of the support layer 2 is -7%, and the maximum strain of the first adhesive layer 1 is -20.3%. Figure 16 shown, the S3 water droplet state is the state where when the middle support structure 100 is adopted, the maximum strain point during the bending of the flexible display device is O3. The maximum strain of the support layer 2 is -7%, and the maximum strain of the first adhesive layer 1 is -20.3%. Figure 8 shown, the S3 water droplet state is the state where when the middle support structure 100 is adopted, the maximum strain point during the bending of the flexible display device is O3. The maximum strain of the support layer 2 is -7%, and the maximum strain of the first adhesive layer 1 is -20.3%.

[0075] Taking A as 5 mm, B as 0.2 mm, C as 0.1 mm, and D as 0.15 mm as the reference, simulations are carried out by increasing A to 10 mm, increasing C to 0.2 mm, decreasing B to 0.1 mm, and decreasing D to 0.1 mm. The simulation results are as Figures 17 to 20 shown.

[0076] As Figure 17 shown, the S4 water droplet state is Figure 13 when the size A of the middle support structure 100 is increased to 10 mm, the state where the maximum strain point during the bending of the flexible display device is O4. The maximum strain of the support layer 2 is -7.1%, and the maximum strain of the first adhesive layer 1 is -24.7%. As Figure 18 shown, the S5 water droplet state is Figure 13 when the size C of the middle support structure 100 is increased to 0.2 mm, the state where the maximum strain point during the bending of the flexible display device is O5. The maximum strain of the support layer 2 is -40%, and the maximum strain of the first adhesive layer 1 is -70%. As Figure 19 shown, the S6 water droplet state is Figure 13 when the size B of the middle support structure 100 is decreased to 0.1 mm, the state where the maximum strain point during the bending of the flexible display device is O6. The maximum strain of the support layer 2 is -9.6%, and the maximum strain of the first adhesive layer 1 is -25.2%. As Figure 20 shown, the S7 water droplet state is Figure 13 when the size D of the middle support structure 100 is decreased to 0.1 mm, the state where the maximum strain point during the bending of the flexible display device is O7. The maximum strain of the support layer 2 is -9.4%, and the maximum strain of the first adhesive layer 1 is -25.4%.

[0077] The following conclusions can be drawn from the simulation results: The strain value of the S3 water droplet state drops to less than that of the S1 water droplet state, which is better than the free water droplet state. The strain value of the S4 water droplet state drops to less than that of the S1 water droplet state, but is still greater than the free water droplet state. The strain value of the S5 water droplet state drops to less than that of the S1 water droplet state. The strain value of the S6 water droplet state increases to greater than that of the S1 water droplet state. The strain value of the S7 water droplet state increases to greater than that of the S1 water droplet state. The strain value of the S6 water droplet state increases to greater than that of the S1 water droplet state.

[0078] The increase in dimension A has a positive effect on reducing the maximum strain of the support structure. Dimension A can be set to be greater than 5 mm and less than or equal to 10 mm. For example, dimension A can be: 5.1 mm, 6 mm, 7 mm, 9 mm, or 10 mm. By simulating different sizes of dimension A, dimension A of 10 mm is preferably selected.

[0079] The decrease in dimension B has a reverse effect on reducing the maximum strain of the support structure. However, due to the etching process accuracy limitation, dimension B is greater than 0.2 mm and less than or equal to 0.3 mm. For example, dimension B can be: 0.2 mm, 0.23 mm, 0.25 mm, 0.27 mm, or 0.3 mm. Dimension B of 0.2 mm is preferably selected.

[0080] Considering the resistance to the bending rebound force of the flexible display module, the bending rebound force should not be too large to avoid exceeding the stress range of the support structure. To adapt to the bending rebound force, dimension C is usually set to 0.1 mm. Reducing dimension C is beneficial to further reducing the maximum strain of the support structure. Within the allowable range of the process, dimension C is less than or equal to 0.1 mm. For example, dimension C can be: 0.1 mm, 0.09 mm, 0.07 mm, 0.06 mm, or 0.05 mm. Dimension C of 0.1 mm is preferably selected.

[0081] The decrease in dimension D has a positive effect on reducing the maximum strain of the support structure. Due to the etching process accuracy limitation, dimension D can be greater than 0.15 mm and less than or equal to 0.2 mm. For example, dimension B can be: 0.16 mm, 0.17 mm, 0.18 mm, 0.19 mm, or 0.2 mm. Dimension D of 0.16 mm is preferably selected.

[0082] Based on the above conclusions, within the above range, combinations of dimension A, dimension B, dimension C, and dimension D can be made for further simulation optimization to further reduce the maximum strain of the support structure. Dimension A is 5 mm or 10 mm, and dimension B can be 0.2 mm, 0.25 mm, or 0.3 mm. For the S8 water droplet state, when dimension A is 5 mm and dimension B is 0.2 mm, the maximum strain of the support layer 2 is -7.7%, and the maximum strain of the first adhesive layer 1 is -24.8%. For the S9 water droplet state, when dimension A is 10 mm and dimension B is 0.25 mm, the maximum strain of the support layer 2 is -6%, and the maximum strain of the first adhesive layer 1 is -23.9%. For the S10 water droplet state, when dimension A is 10 mm and dimension B is 0.3 mm, the maximum strain of the support layer 2 is -5.8%, and the maximum strain of the first adhesive layer 1 is -23.5%. The maximum strain value in the S10 water droplet state is comparable to that in the free water droplet state, so it can be used as an optimization scheme for the full engraving pattern 21.

[0083] It should be noted that the first direction x is Figure 12 and Figure 13 the x direction shown in Figures 1 to 13 The second direction y is Figures 1 to 10 the y direction shown in

[0084] An embodiment of the present invention also provides a flexible display module, which may include a flexible display panel and the support structure provided in any one of the aspects of the present invention. The flexible display panel is bonded to the side of the first adhesive layer 1 away from the support layer. The specific structure and beneficial effects of the flexible display module can also refer to the support structure, so details are not described herein again.

[0085] An embodiment of the present invention also provides a flexible display device, which may include the flexible display module of any one of the above embodiments of the present invention. The specific structure and beneficial effects of the flexible display device can also refer to the flexible display module, so details are not described herein again.

[0086] It should be noted that in addition to the flexible display module, the flexible display device also includes other necessary components and compositions, such as a housing, a circuit board, a power cord, etc. Those skilled in the art can make corresponding supplements according to the specific usage requirements of the flexible display device, which are not elaborated herein.

[0087] When the flexible display module has the above-mentioned structure, the flexible display device can be a traditional electronic device, such as a mobile phone, a computer, a television, and a video camera, or it can be an emerging wearable device, such as a virtual reality device and an augmented reality device, which are not listed one by one here.

[0088] Those skilled in the art will readily conceive of other embodiments of the present utility model after considering the specification and practicing the disclosure hereof. This application is intended to cover any variations, uses, or adaptations of the present utility model, which follow the general principles of the present utility model and include known common general knowledge or conventional technical means in the technical field not disclosed in the present utility model. The specification and examples are only regarded as exemplary, and the true scope and spirit of the present utility model are pointed out by the appended claims.

Claims

1. A support structure, characterized in that: include: a first adhesive layer; A support layer is provided on one side of the first adhesive layer, and the support layer is provided with a full-engraved pattern extending along a first direction; A dustproof structure, arranged on a side of the support layer away from the first adhesive layer, the dustproof structure covering the full-engraved pattern; The first bonding parts are respectively arranged on both sides of the fully engraved pattern; The support portion is arranged on a side of the first adhesive portion away from the first adhesive layer, and the support portion and a side of the dustproof structure away from the first adhesive layer are bonded to each other.

2. The support structure according to claim 1, characterized in that: The dustproof structure includes a first dustproof layer, which is arranged on the side of the supporting layer away from the first adhesive layer, the side of the first adhesive portion away from the first adhesive layer is flush with the side of the first dustproof layer away from the first adhesive layer, and the supporting portion and the side of the first dustproof layer away from the first adhesive layer are in contact with each other.

3. The support structure according to claim 1, characterized in that: The dustproof structure includes a first dustproof layer and a second dustproof layer. The first dustproof layer is arranged on a side of the supporting layer away from the first adhesive layer, and the second dustproof layer is arranged on a side of the first dustproof layer away from the first adhesive layer. The side of the first adhesive portion away from the first adhesive layer is flush with the side of the second dustproof layer away from the first adhesive layer, and the supporting portion and the side of the second dustproof layer away from the first adhesive layer are in contact with each other.

4. The support structure according to claim 1, characterized in that: The dustproof structure includes a first dustproof layer and a second dustproof layer, the first dustproof layer is arranged on a side of the supporting layer away from the first adhesive layer, the second dustproof layer is arranged on a side of the first dustproof layer away from the first adhesive layer, the side of the second dustproof layer away from the first adhesive layer is higher than the side of the first adhesive portion away from the first adhesive layer, the supporting portion is attached to and presses the second dustproof layer, so that the side of the second dustproof layer away from the first adhesive layer is flush with the side of the first adhesive portion away from the first adhesive layer.

5. The support structure according to claim 1, characterized in that: The fully engraved pattern includes a plurality of support bars extending along a first direction, a connecting portion being provided between two adjacent support bars, the connecting portion connecting the adjacent support bars together to form a support unit, and the connecting portions of two adjacent support units being staggered along the first direction.

6. The support structure according to claim 5, characterized in that: A distance between two adjacent connecting portions of the same supporting unit along the first direction is greater than 5 mm and less than or equal to 10 mm.

7. The support structure according to claim 5 or 6, characterized in that: The width of the connecting portion along the first direction is greater than 0.2 mm and less than or equal to 0.3 mm.

8. The support structure according to claim 7, characterized in that: A dimension of the support bar along a second direction is less than or equal to 0.1 mm, and the second direction intersects with the first direction.

9. The support structure according to claim 7, characterized in that: The dimension of the connecting portion along the second direction is greater than 0.15 mm and less than or equal to 0.2 mm.

10. The support structure according to claim 5, characterized in that The support layer is provided with at least two half-engraved grooves, and the at least two half-engraved grooves are respectively located on a side of the two first bonding portions away from the full-engraved pattern along a second direction, and the second direction intersects with the first direction.

11. The support structure according to claim 10, characterized in that A stress buffer groove is provided on a side of the first adhesive layer away from the support layer. The stress buffer groove extends along a first direction, and the orthographic projection of the stress buffer groove on the support layer overlaps with the compressed support strip.

12. The support structure according to claim 11, characterized in that The dimension of the stress buffer groove along the second direction remains unchanged along the thickness direction of the first adhesive layer, and / or the dimension of the stress buffer groove along the second direction gradually increases or decreases along the thickness direction of the first adhesive layer, and / or the dimension of the stress buffer groove along the second direction first gradually increases and then gradually decreases along the thickness direction of the first adhesive layer.

13. The support structure according to claim 1, characterized in that The support structure further includes a first filling portion, which is disposed on a side of the dustproof structure away from the first adhesive layer, and the side of the first filling portion away from the first adhesive layer is flush with a side of the support portion away from the first adhesive layer.

14. The support structure according to claim 10, characterized in that The support structure also includes a second filling portion, which is arranged on a side of the half-groove away from the first adhesive layer and fills the half-groove. The side of the second filling portion away from the first adhesive layer is flush with the side of the support portion away from the first adhesive layer.

15. The support structure according to claim 14, characterized in that The support structure further includes a buffer portion, which is located along the second direction on one side of the two second filling portions away from the full-engraved pattern, and the buffer portion is connected to the support layer through a second adhesive portion.

16. A flexible display module, characterized in that: include: The support structure according to any one of claims 1 to 15; The flexible display panel is bonded to a side of the first bonding layer away from the supporting layer.

17. A flexible display device, characterized in that: Comprising the flexible display module as claimed in claim 16.

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