Flexible support plate and flexible display device

Abstract

The present invention relates to the field of display technology, and proposes a flexible support plate and a flexible display device. The flexible support plate includes: an opening area and at least one solid area arranged on at least one side of the opening area; a plurality of through holes are arranged in the opening area, and the opening area includes a middle area and a transition area, and the transition area is arranged between the middle area and the solid area, and the width of the transition area decreases as the distance from the middle area increases. When the flexible support plate is bent, the deformation of the transition area is gradual, and the stress is also gradual without sudden changes, that is, the stress changes more evenly, avoiding hard-angle bending due to sudden stress changes during bending, thereby avoiding film separation and cracking problems; moreover, it can be applied to flexible display devices with smaller bending radius.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a flexible support plate and a flexible display device comprising the flexible support plate. Background Art

[0002] The flexible OLED (Organic Light-Emitting Diode) display device includes a flexible display panel, on which a glass cover is attached. The glass cover protects the flexible display panel and maintains the strength of the flexible display panel. Because the glass cover is hard, has low toughness, and is brittle after stretching, the surface of the folded flexible display panel needs to be protected by a cover film. In order to ensure the strength of the flexible display panel, a stainless steel support plate is usually attached to the back of the flexible display panel. After the flexible display panel is bent, due to changes in the stress of the film layer and the change of the neutral layer, film separation and cracks are likely to occur at the edge of the bending arc.

[0003] The above information disclosed in the Background section is only for enhancement of understanding of the background of the present disclosure and therefore it may include information that does not constitute the prior art that is already known to one of ordinary skill in the art. Summary of the invention

[0004] The object of the present invention is to overcome the above-mentioned shortcomings of the prior art that film separation and cracks are prone to occur, and to provide a flexible support plate that is not prone to film separation and cracks and a flexible display device including the flexible support plate.

[0005] Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

[0006] According to one aspect of the present disclosure, there is provided a flexible support plate, comprising: an opening area and at least one solid area arranged on at least one side of the opening area; the opening area comprises a middle area and a transition area, a plurality of through holes are arranged in both the middle area and the transition area, the transition area is arranged between the middle area and the solid area, and the width of the transition area decreases as the distance from the middle area increases.

[0007] In an exemplary embodiment of the present disclosure, the transition region comprises:

[0008] A plurality of first sub-transition regions are provided, each of the first sub-transition regions is disposed between the middle region and the solid region, and a width of the first sub-transition region decreases as the distance from the middle region increases.

[0009] In an exemplary embodiment of the present disclosure, a boundary line connecting the first sub-transition area and the solid area is set to be an arc line or a broken line.

[0010] In an exemplary embodiment of the present disclosure, a plurality of the first sub-transition regions have the same shape and the same area, or a plurality of the first sub-transition regions have the same shape and different areas, or a plurality of the first sub-transition regions have different shapes and different areas.

[0011] In an exemplary embodiment of the present disclosure, the transition region further includes:

[0012] A plurality of second sub-transition regions are provided, each of which is connected between the first sub-transition region and the entity region, and a width of an end of the second sub-transition region close to the entity region decreases as the distance from the middle region increases.

[0013] In an exemplary embodiment of the present disclosure, a boundary line connecting the second sub-transition area and the solid area is set to be an arc line or a broken line.

[0014] In an exemplary embodiment of the present disclosure, a plurality of the second sub-transition regions have the same shape and the same area, or a plurality of the second sub-transition regions have the same shape and different areas, or a plurality of the second sub-transition regions have different shapes and different areas.

[0015] In an exemplary embodiment of the present disclosure, the density of the through holes decreases as the distance from the middle region increases.

[0016] In an exemplary embodiment of the present disclosure, the density of the through holes in the middle region is equal to or greater than the density of the through holes in the first sub-transition regions, and the density of the through holes in the second sub-transition region is less than the density of the through holes in the first sub-transition region.

[0017] In an exemplary embodiment of the present disclosure, a cross-sectional area of ​​the through hole decreases as the distance from the middle region increases.

[0018] In an exemplary embodiment of the present disclosure, the cross-sectional area of ​​the through holes in the middle region is equal to or greater than the cross-sectional area of ​​the through holes in the plurality of first sub-transition regions, and the cross-sectional area of ​​the through holes in the second sub-transition region is smaller than the cross-sectional area of ​​the through holes in the first sub-transition region.

[0019] According to one aspect of the present disclosure, a flexible display device is provided, comprising any one of the flexible support plates described above.

[0020] In an exemplary embodiment of the present disclosure, the flexible display device further includes:

[0021] A flexible display panel is arranged on one side of the flexible support plate, and the flexible display panel includes a bending area and a plane area, and a connecting area connected between the bending area and the plane area, the bending area is arranged opposite to the middle area of ​​the flexible support plate, and the connecting area is arranged opposite to the transition area of ​​the flexible support plate.

[0022] It can be seen from the above technical solution that the present invention has at least one of the following advantages and positive effects:

[0023] The flexible support plate of the present invention comprises an open area and a solid area which are connected to each other. The open area is provided with a plurality of through holes. The open area comprises a middle area and a transition area. The transition area is provided between the middle area and the solid area. The width of the transition area decreases as the distance from the middle area increases, so that the transition area forms a gradually shrinking structure, so that the deformation of the transition area is gradual during bending, and the stress is also gradual without sudden changes, that is, the stress changes relatively evenly, avoiding hard-angle bending due to sudden stress changes during bending, thereby avoiding film layer separation and cracking problems; moreover, it can be applied to flexible display devices with smaller bending radius. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

[0025] Figure 1 It is a structural schematic diagram of a flexible support plate in the related art;

[0026] Figure 2 yes Figure 1 A schematic diagram of the structure after the flexible support plate is unfolded;

[0027] Figure 3 is a schematic structural diagram of a first exemplary embodiment of a flexible support plate of the present invention;

[0028] Figure 4 is a schematic structural diagram of a second exemplary embodiment of a flexible support plate of the present invention;

[0029] Figure 5 is a schematic structural diagram of a third exemplary embodiment of a flexible support plate of the present invention;

[0030] Figure 6 is a schematic structural diagram of a fourth exemplary embodiment of a flexible support plate of the present invention;

[0031] Figure 7 is a schematic structural diagram of a fifth exemplary embodiment of a flexible support plate of the present invention;

[0032] Figure 8 is a schematic structural diagram of a sixth exemplary embodiment of a flexible support plate of the present invention;

[0033] Fig. 9 is a schematic structural diagram of a seventh exemplary embodiment of a flexible support plate of the present invention;

[0034] Fig.10 is a schematic structural diagram of an eighth exemplary embodiment of a flexible support plate of the present invention;

[0035] Fig.11 is a schematic structural diagram of a ninth exemplary embodiment of a flexible support plate of the present invention;

[0036] Fig.12 is a schematic structural diagram of a tenth exemplary embodiment of a flexible support plate of the present invention;

[0037] Fig.13 is a structural schematic diagram of an eleventh exemplary embodiment of a flexible support plate of the present invention;

[0038] Fig.14 is a schematic structural diagram of a twelfth exemplary embodiment of a flexible support plate of the present invention;

[0039] Fig.15 is a schematic structural diagram of a thirteenth exemplary embodiment of a flexible support plate of the present invention;

[0040] Fig.16 is a schematic structural diagram of a fourteenth exemplary embodiment of a flexible support plate of the present invention;

[0041] Fig.17 It is a schematic diagram of the structure of the flexible support plate after bending of the present invention.

[0042] The main components in the figure are described as follows:

[0043] 1. Physical area;

[0044] 2. Opening area; 21. Middle area; 22. Transition area; 221. First sub-transition area; 222. Second sub-transition area;

[0045] 3. Through hole. DETAILED DESCRIPTION

[0046] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0047] Reference Figure 1 and Figure 2The structural schematic diagram of the flexible support plate in the related art shown in the figure shows that in order to achieve a smaller bending radius and reduce the stress of the film layer after bending, a patterned flexible support plate is used, that is, some patterns are designed and through holes 3 are formed in the middle of the bending of the flexible support plate to increase the ductility and plasticity of the flexible support plate and reduce the stress change. However, due to the difference between the stress of the opening area 2 of the flexible support plate and the stress of the solid area 1, a hard angle bend is generated at the connection position of the opening area 2 and the solid area 1 during bending due to the sudden change of stress, that is, the opening area 2 is easy to bend while the solid area 1 is not easy to bend, and a bending angle instead of an arc bend is formed at the connection position, which leads to film separation and cracks at the transition position between the opening area 2 and the solid area 1; and it is not conducive to the application of flexible display devices with a smaller bending radius.

[0048] This exemplary embodiment first provides a flexible support plate, referring to Figure 3-Figure 17 A structural schematic diagram of an exemplary embodiment of a flexible support plate of the present invention is shown; the flexible support plate may include: an opening area 2 and at least one solid area 1 arranged on at least one side of the opening area 2; the opening area 2 includes a middle area 21 and a transition area 22, a plurality of through holes 3 are provided in both the middle area 21 and the transition area 22, the transition area 22 is arranged between the middle area 21 and the solid area 1, and the width of the transition area 22 decreases as the distance from the middle area 21 increases.

[0049] In the flexible support plate of the present invention, the width of the transition area 22 decreases as the distance from the middle area 21 increases, so that the transition area 22 forms a gradually shrinking structure. Fig.16 As shown, the deformation of the transition area 22 is gradual during bending, and the stress is also gradual without sudden changes, that is, the stress changes relatively evenly, avoiding hard-angle bending due to sudden stress changes during bending, thereby avoiding film layer separation and cracking problems; moreover, it can be applied to flexible display devices with smaller bending radius.

[0050] The structure of the flexible support plate is described in detail below.

[0051] Reference Figure 3-Figure 12 As shown, in this exemplary embodiment, the flexible support plate can be set to a rectangular shape, and the flexible support plate can include an opening area 2 located in the middle of the length direction, and two solid areas 1 connected to both sides of the opening area 2. A plurality of through holes 3 are provided in the opening area 2, and no through holes 3 are provided in the solid area 1. Of course, in other exemplary embodiments of the present invention, the flexible support plate can be set to various shapes such as a square and a polygon; the solid area 1 can also be provided with only one on one side of the opening area 2, or multiple solid areas 1 can be provided on multiple sides of the opening area 2.

[0052] The opening area 2 may include a middle area 21 and a transition area 22. The middle area 21 is set to be a rectangle. The length of the middle area 21 is the same as the width of the flexible support plate, that is, the middle area 21 runs through both ends of the flexible support plate in the width direction. A flexible display panel is provided on one side of the flexible support plate. The bending area of ​​the flexible display panel is arranged opposite to the middle area 21 of the flexible support plate, and the connection area of ​​the flexible display panel is arranged opposite to the transition area 22 of the flexible support plate. In addition, the shape of the middle area 21 can also be set to other shapes as needed, which will not be repeated here.

[0053] Reference Figure 3-Figure 9 As shown, the transition region 22 may include a plurality of first sub-transition regions 221, each of which is connected between the middle region 21 and the solid region 1, that is, the plurality of first sub-transition regions 221 are arranged along the width direction of the flexible support plate, and the width of the first sub-transition region 221 decreases as the distance from the middle region 21 increases.

[0054] In all example embodiments, the width of the first sub-transition region 221 refers to the dimension in the width direction of the flexible support plate; in other words, the width of the first sub-transition region 221 is perpendicular to the connection direction of the middle region 21, the transition region 22 and the solid region 1.

[0055] Reference Figure 3 and Figure 4 As shown, the first sub-transition region 221 can be set as an isosceles triangle, and the base of the isosceles triangle is collinear with the edge line of the middle region 21, so that the width of the first sub-transition region 221 decreases as the distance from the middle region 21 increases, and the boundary line connecting the first sub-transition region 221 and the entity region 1 is formed as a broken line. Of course, in other exemplary embodiments of the present invention, the first sub-transition region 221 can also be set as an isosceles trapezoid, and the long base of the isosceles trapezoid is collinear with the edge line of the middle region 21, so that the width of the first sub-transition region 221 decreases as the distance from the middle region 21 increases, and the boundary line connecting the first sub-transition region 221 and the entity region 1 is formed as a broken line. In addition, the first sub-transition region 221 can also be set to any triangle or any trapezoid, or a pentagon or a polygon, as long as one long side of the pentagon or polygon is collinear with the edge line of the middle region 21, and the part of the pentagon or polygon close to the side of the solid area 1 is gradually reduced, the purpose of reducing the width of the first sub-transition region 221 as the distance from the middle region 21 increases can also be achieved.

[0056] It should be noted that the boundary line connecting the first sub-transition region 221 and the physical region 1 is a virtual line segment or arc formed by connecting the point closest to the physical region 1 on at least one through hole in the first sub-transition region 221, or a virtual line segment or arc formed by connecting the point at a set distance from the point closest to the physical region 1 on at least one through hole in the first sub-transition region 221.

[0057] The dividing line connecting the first sub-transition region 221 and the second sub-transition region 221 is a virtual line segment or arc formed by connecting the point on at least one through hole in the first sub-transition region 221 that is closest to the second sub-transition region 221, or a virtual line segment or arc formed by connecting the point at a set distance from the point on at least one through hole in the first sub-transition region 221 that is closest to the second sub-transition region 221.

[0058] Reference Figure 5 and Figure 6 As shown, the first sub-transition region 221 can be set to a semi-ellipse, and the straight side of the semi-ellipse is collinear with the edge line of the middle region 21, so that the width of the first sub-transition region 221 decreases as the distance from the middle region 21 increases, and the boundary line connecting the first sub-transition region 221 and the entity region 1 is formed as an arc. Of course, in other exemplary embodiments of the present invention, the first sub-transition region 221 can be set to a less than semi-ellipse, so that the width of the first sub-transition region 221 decreases as the distance from the middle region 21 increases, and the boundary line connecting the first sub-transition region 221 and the entity region 1 is formed as an arc. In addition, the first sub-transition region 221 can also be set to a semicircle or a less than semicircle; the boundary line connecting the first sub-transition region 221 and the entity region 1 can also be set to a parabolic arc, or any arc or various combined arcs; as long as the width of the first sub-transition region 221 decreases as the distance from the middle region 21 increases.

[0059] Reference Figure 3 and Figure 5 As shown, the through hole 3 can be a rectangular through hole. The width of the rectangular through hole 3 in the opening area 2 is the same, but the length can be different according to the setting position. For example, the length of the rectangular through hole in the middle area is longer, and the length of the rectangular through hole in the first sub-transition area 221 is shorter.

[0060] Reference Figure 4 and Figure 6 As shown, the through hole 3 may be a circular through hole, and the diameters of the circular through holes 3 in the opening area 2 may be the same.

[0061] The shape of the through hole 3 is not limited to the above description. For example, in other exemplary embodiments of the present invention, the through hole 3 may also be an oval through hole, an elliptical through hole, a square through hole, etc. All of these through holes 3 fall within the protection scope of the present application.

[0062] In the above exemplary embodiments, the plurality of first sub-transition regions 221 have the same shape and the same area. In other exemplary embodiments, the plurality of first sub-transition regions 221 have the same shape but different areas. Figure 7 As shown, the shapes of the multiple first sub-transition regions 221 are all isosceles triangles, but the lengths of the bases of the isosceles triangles are the same, but the heights are different, resulting in different areas of the isosceles triangles. Figure 8 As shown, the shapes of the plurality of first sub-transition regions 221 are the same, that is, semi-ellipses, but the axis lengths of the semi-ellipses are different, resulting in different areas of the semi-ellipses.

[0063] Of course, the multiple first sub-transition regions 221 may also be structures with different shapes and different areas. Fig. 9 As shown, multiple first sub-transition areas 221 can be a structure in which isosceles triangles and semi-ellipses are arranged at intervals, that is, one isosceles triangle and one semi-ellipses, and a semi-ellipses is arranged between two adjacent isosceles triangles; and the arrangement method can also be various, and can be an identically spaced arrangement in pairs, for example, two isosceles triangles and two semi-ellipses, and two semi-ellipses are arranged between two adjacent isosceles triangles; it can also be an irregular arrangement, which will not be repeated here.

[0064] In addition, the plurality of first sub-transition regions 221 may also be structures of different shapes but the same area. The specific arrangement of the plurality of first sub-transition regions 221 may be as follows: Fig. 9 The same as shown, but the area of ​​the isosceles triangle can be made the same as the area of ​​the semicircle by calculation, which can also achieve the purpose of avoiding film separation and cracks.

[0065] In some other exemplary embodiments of the present invention, referring to Figure 10-12 As shown, the transition region 22 may also include a plurality of second sub-transition regions 222, each of which is connected between the first sub-transition region 221 and the entity region 1, that is, the plurality of second sub-transition regions 222 are arranged along the width direction of the flexible support plate, and the width of one end of the second sub-transition region 222 close to the entity region 1 decreases as the distance from the middle region 21 increases.

[0066] In all example embodiments, the width of the second sub-transition region 221 refers to the dimension in the width direction of the flexible support plate; in other words, the width of the second sub-transition region 221 is perpendicular to the connection direction of the middle region 21, the transition region 22 and the solid region 1.

[0067] Reference Fig.10As shown, the boundary line connecting the second sub-transition region 222 and the entity region 1 can be set as a semi-elliptical arc, so that the width of the end of the second sub-transition region 222 close to the entity region 1 decreases as the distance from the middle region 21 increases. Of course, in other exemplary embodiments of the present invention, the boundary line connecting the second sub-transition region 222 and the entity region 1 can also be set as a variety of arcs such as a semi-elliptical arc, a semicircular arc, a semi-circular arc, a parabolic arc, or any arc shape or various combined arc shapes; as long as the width of the end of the second sub-transition region 222 close to the entity region 1 decreases as the distance from the middle region 21 increases.

[0068] It should be noted that the boundary line connecting the second sub-transition region 222 and the physical region 1 is a virtual line segment or arc formed by connecting the point closest to the physical region 1 on at least one through hole in the second sub-transition region 222, or a virtual line segment or arc formed by connecting the point at a set distance from the point closest to the physical region 1 on at least one through hole in the second sub-transition region 222.

[0069] Reference Fig.11 As shown, the boundary line connecting the second sub-transition region 222 and the entity region 1 can also be set as a broken line, so that the end of the second sub-transition region 222 close to the entity region 1 forms a triangle, and the width of the end of the second sub-transition region 222 close to the entity region 1 can also decrease with the increase of the distance from the middle region 21. Of course, in other exemplary embodiments of the present invention, the end of the second sub-transition region 222 close to the entity region 1 can also form a trapezoid, a pentagon or a polygon, etc., as long as the part of the trapezoid, pentagon or polygon close to the side of the entity region 1 is gradually reduced, the width of the end of the second sub-transition region 222 close to the entity region 1 can be reduced with the increase of the distance from the middle region 21.

[0070] Please continue to refer to Fig.10 and Fig.11 As shown, the shape of the boundary line connecting the second sub-transition area 222 and the physical area 1 can be the same as the shape of the boundary line connecting the second sub-transition area 222 and the first sub-transition area 221. For example, the boundary line connecting the second sub-transition area 222 and the physical area 1 can be set as a semi-elliptical arc, and the shape of the edge connecting the second sub-transition area 222 and the first sub-transition area 221 can also be set as a semi-elliptical arc; or the edge connecting the second sub-transition area 222 and the physical area 1 can be set as a broken line, and the shape of the edge connecting the second sub-transition area 222 and the first sub-transition area 221 can also be set as a broken line. Of course, in the case where the edge connecting the second sub-transition area 222 and the first sub-transition area 221 is set as a semi-circular arc, a semi-elliptical arc, a parabolic arc, etc., the edge connecting the second sub-transition area 222 and the physical area 1 is correspondingly set as a semi-circular arc, a semi-elliptical arc, a parabolic arc, etc.

[0071] The density of the through holes 3 may decrease as the distance from the middle region 21 increases. The density of the through holes 3 may be the same for all through holes in the first sub-transition region 221, or the same for all through holes in the second sub-transition region 222, but the density of the through holes in the first sub-transition region 221, the density of the through holes in the second sub-transition region 222, and the density of the through holes in the middle region 21 are different. Fig.10 and Fig.11 In the example embodiment shown, the density of the through holes 3 in the middle region 21 is the same as the density of the through holes 3 in the plurality of first sub-transition regions 221, and the density of the through holes 3 in the second sub-transition region 222 is less than the density of the through holes 3 in the first sub-transition region 221. Of course, the density of the through holes 3 in the middle region 21 may be greater than the density of the through holes 3 in the first sub-transition region 221, and the density of the through holes 3 in the second sub-transition region 222 may be less than the density of the through holes 3 in the first sub-transition region 221; in the case where a third sub-transition region 22 is subsequently provided, the density of the through holes 3 in the third sub-transition region 22 may be less than the density of the through holes 3 in the second sub-transition region 222. The density of the through holes 3 may also change gradually within the first sub-transition region 221 or the second sub-transition region 222, for example, referring to Fig.13 As shown, the density of the through holes 3 in the first transitional sub-region 221 decreases as the distance from the middle region 21 increases.

[0072] The cross-sectional area of ​​the through hole 3 may decrease as the distance from the middle region 21 increases. The cross-sectional area of ​​the through hole 3 may gradually change in the first sub-transition region 221 or the second sub-transition region 222. For example, referring to Fig.14 As shown, the through hole 3 is a long strip-shaped through hole. The cross-sectional area of ​​the through hole 3 in the first sub-transition region 221 decreases as the distance from the middle region 21 increases. The length decreases as shown in the figure. Of course, the width may also decrease. The cross-sectional area of ​​the through hole 3 may also be the same for all the through holes in the first sub-transition region 221, or the same for all the through holes in the second sub-transition region 222, but the cross-sectional area of ​​the through holes in the first sub-transition region 221, the cross-sectional area of ​​the through holes in the second sub-transition region 222, and the cross-sectional area of ​​the through holes in the middle region 21 are different. Fig.15As shown, the through hole 3 is a circular through hole, the diameter of the through hole 3 in the middle region 21 is the same as the diameter of the through holes 3 in the first sub-transition regions 221, and the diameter of the through hole 3 in the second sub-transition region 222 is smaller than the diameter of the through hole 3 in the first sub-transition region 221. Of course, the diameter of the through hole 3 in the middle region 21 may be larger than the diameter of the through holes 3 in the first sub-transition regions 221; the diameter of the through hole 3 in the second sub-transition region 222 may be smaller than the diameter of the through hole 3 in the first sub-transition region 221. In the case where a third sub-transition region is subsequently provided, the diameter of the through hole 3 in the third sub-transition region may be smaller than the diameter of the through hole 3 in the second sub-transition region 222.

[0073] In addition, the shape of the boundary line connecting the second sub-transition region 222 and the physical region 1 may be different from the shape of the boundary line connecting the second sub-transition region 222 and the first sub-transition region 221. Fig.15 As shown, the boundary line connecting the second sub-transition area 222 and the physical area 1 can be set to a broken line, and the shape of the boundary line connecting the second sub-transition area 222 and the first sub-transition area 221 is also set to a semicircular arc; or, the boundary line connecting the second sub-transition area 222 and the physical area 1 can be set to a semi-elliptical arc, and the shape of the boundary line connecting the second sub-transition area 222 and the first sub-transition area 221 is also set to a broken line.

[0074] The above exemplary embodiments illustrate that: when the shapes and areas of the plurality of first sub-transition regions 221 are the same, the shapes and areas of the plurality of second sub-transition regions 222 may be the same. Fig.16 As shown, when the multiple first sub-transition regions 221 have the same shape and the same area, the multiple second sub-transition regions 222 have the same shape and different areas; of course, the multiple second sub-transition regions 222 may have different shapes and different areas. When the multiple first sub-transition regions 221 have different shapes and different areas, the multiple second sub-transition regions 222 may have different shapes but the same area; alternatively, the multiple second sub-transition regions 222 may have different shapes and different areas.

[0075] Of course, in some further exemplary embodiments of the present invention, the transition region 22 may further include a plurality of third sub-transition regions, each of which is connected between the second sub-transition region 222 and the entity region 1, and the width of one end of the third sub-transition region close to the entity region 1 decreases as the distance from the middle region 21 increases. The boundary line connecting the third sub-transition region 22 and the entity region 1 may be set as an arc or a fold line, and the specific structure of the arc or the fold line is as described above, and therefore, it will not be repeated here.

[0076] Furthermore, this exemplary embodiment first provides a flexible display device, which may include any one of the flexible support plates described above. The specific structure of the flexible support plate has been described in detail above, so it will not be repeated here.

[0077] In this example embodiment, the flexible display device may also include a flexible display panel, which is arranged on one side of the flexible support plate, the flexible display panel including a bending area and a plane area, and a connecting area connected between the bending area and the plane area, the bending area of ​​the flexible display panel is arranged opposite to the middle area 21 of the flexible support plate, and the so-called relative arrangement can be that the bending area is directly opposite to the middle area 21, that is, the orthographic projection of the bending area on the flexible support plate coincides with the middle area 21, or the orthographic projection of the bending area on the flexible support plate is slightly larger than or smaller than the middle area 21; and the connecting area of ​​the flexible display panel is arranged opposite to the transition area 22 of the flexible support plate, and the so-called relative arrangement can be that the connecting area is directly opposite to the transition area 22, that is, the orthographic projection of the connecting area on the flexible support plate coincides with the transition area 22, or the orthographic projection of the connecting area on the flexible support plate is slightly larger than or smaller than the transition area 22.

[0078] When the flexible display device is bent, the deformation of the transition area 22 of the flexible support plate is gradual, and the stress is also gradual without sudden changes, that is, the stress changes relatively evenly, avoiding hard-angle bending due to sudden changes in the stress of the flexible support plate during bending, thereby avoiding film layer separation and cracking problems of the flexible display panel; moreover, it can be applied to flexible display devices with smaller bending radius.

[0079] The features, structures or characteristics described above may be combined in one or more embodiments in any suitable manner, and if possible, the features discussed in each embodiment are interchangeable. In the above description, many specific details are provided to provide a full understanding of the embodiments of the present invention. However, those skilled in the art will appreciate that the technical solution of the present invention may be practiced without one or more of the specific details, or other methods, components, materials, etc. may be adopted. In other cases, known structures, materials or operations are not shown or described in detail to avoid blurring various aspects of the present invention.

[0080] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of the illustration to another component, these terms are used in this specification only for convenience, such as according to the orientation of the examples described in the drawings. It is understood that if the device of the illustration is turned upside down, the component described as "upper" will become the component "lower". When a structure is "on" other structures, it may mean that the structure is formed integrally on the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

[0081] In this specification, the terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "comprising", "including" and "having" are used to express an open-ended inclusion and mean that additional elements / components / etc. may exist in addition to the listed elements / components / etc.; the terms "first", "second" and "third" etc. are used only as labels and are not intended to limit the quantity of their objects.

[0082] It should be understood that the present invention is not limited in its application to the detailed structure and arrangement of the components proposed in this specification. The present invention can have other embodiments and can be implemented and executed in a variety of ways. The aforementioned variations and modifications fall within the scope of the present invention. It should be understood that the present invention disclosed and defined in this specification extends to all alternative combinations of two or more individual features mentioned or evident in the text and / or the drawings. All these different combinations constitute multiple alternative aspects of the present invention. The embodiments described in this specification illustrate the best mode known for implementing the present invention and will enable those skilled in the art to utilize the present invention.

Claims

1. A flexible support plate, characterized in that: The flexible support plate is used to support the flexible display panel, the flexible display panel includes a bending area and a plane area, and a connection area connected between the bending area and the plane area, the flexible support plate includes: an opening area and at least one solid area arranged on at least one side of the opening area; the opening area includes a middle area and a transition area, a plurality of through holes are arranged in the middle area and the transition area, the transition area is arranged between the middle area and the solid area, and the width of the transition area decreases as the distance from the middle area increases; Among them, the bending area is arranged opposite to the middle area of ​​the flexible support plate, the connecting area is arranged opposite to the transition area of ​​the flexible support plate, the transition area includes a plurality of first sub-transition areas, the through hole density of the middle area is the same as the through hole density of the first sub-transition area, and the cross-sectional area of ​​the through hole of the middle area is the same as the cross-sectional area of ​​the through hole of the first sub-transition area.

2. The flexible support plate according to claim 1, characterized in that: Each of the first sub-transition regions is disposed between the middle region and the solid region, and a width of the first sub-transition region decreases as a distance from the middle region increases.

3. The flexible support plate according to claim 2, characterized in that: The boundary line connecting the first sub-transition area and the solid area is set as an arc line or a broken line.

4. The flexible support plate according to claim 2, characterized in that: The first sub-transition regions have the same shape and the same area, or the first sub-transition regions have the same shape and different areas, or the first sub-transition regions have different shapes and different areas.

5. The flexible support plate according to claim 2, characterized in that: The transition area also includes: A plurality of second sub-transition regions are provided, each of which is connected between the first sub-transition region and the entity region, and a width of an end of the second sub-transition region close to the entity region decreases as the distance from the middle region increases.

6. The flexible support plate according to claim 5, characterized in that: The boundary line connecting the second sub-transition area and the solid area is set as an arc line or a broken line.

7. The flexible support plate according to claim 5, characterized in that: A plurality of the second sub-transition regions have the same shape and the same area, or a plurality of the second sub-transition regions have the same shape and different areas, or a plurality of the second sub-transition regions have different shapes and different areas.

8. A flexible display device, characterized in that: It comprises the flexible support plate according to any one of claims 1 to 7, and a flexible display panel, wherein the flexible display panel is arranged on one side of the flexible support plate.

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