CN113724596A

CN113724596A - Display device, display module and folding structure

Info

Publication number: CN113724596A
Application number: CN202111006833.5A
Authority: CN
Inventors: 郝潇鸣; 高彪; 李钊
Original assignee: BOE Technology Group Co Ltd
Current assignee: BOE Technology Group Co Ltd
Priority date: 2021-08-30
Filing date: 2021-08-30
Publication date: 2021-11-30
Anticipated expiration: 2041-08-30
Also published as: CN113724596B

Abstract

The disclosure provides a display device, a display module and a folding structure. This beta structure includes: the bearing assembly is used for bearing the flexible display panel and comprises at least two bearing areas, a spacing area is arranged between every two adjacent bearing areas, and one bearing area in the two adjacent bearing areas can be turned over relative to the other bearing area so as to fold or unfold the flexible display panel; the supporting piece comprises a connecting end and a free end, the connecting end is connected to one side, facing the flexible display panel, of the bearing area, the free end can rotate relative to the connecting end, and the rotating axis of the free end is parallel to the overturning axis of the bearing area. The flexible display panel and the display device can reduce the failure risk of the flexible display panel.

Description

Display device, display module and folding structure

Technical Field

The present disclosure relates to the field of display technologies, and in particular, to a display device, a display module, and a folding structure.

Background

With the development of science and technology, the traditional rigid display device cannot meet the requirements of modern people; the application of the folding display device to terminals such as smart phones and tablet computers is more and more extensive. However, the existing folding display device has a high risk of failure.

Disclosure of Invention

An object of the present disclosure is to provide a display device, a display module and a folding structure, which can reduce the failure risk of a flexible display panel.

According to an aspect of the present disclosure, there is provided a folding structure for folding a flexible display panel, including:

the bearing assembly is used for bearing the flexible display panel and comprises at least two bearing areas, a spacing area is arranged between every two adjacent bearing areas, and one bearing area in the two adjacent bearing areas can be turned over relative to the other bearing area so as to fold or unfold the flexible display panel;

the supporting piece comprises a connecting end and a free end, the connecting end is connected to one side, facing the flexible display panel, of the bearing area, the free end can rotate relative to the connecting end, and the rotating axis of the free end is parallel to the overturning axis of the bearing area;

wherein, adjacent two the load-bearing area overturns in order to fold the in-process of flexible display panel, support piece can rotate to with the preset position of flexible display panel contact, be located preset position support piece's free end is located the link is close to one side of interval, and is located preset position support piece with the load-bearing area forms an contained angle.

Further, the bearing area comprises a first area and a second area, the second area is located on one side of the first area close to the spacing area, a concave portion is arranged on one side of the second area facing the flexible display panel, and the supporting piece can enter/leave the concave portion under the rotation of the free end.

Further, the support member includes a first side surface coplanar with a surface of the first region facing the flexible display panel after the support member enters the recess, and a second side surface engaged with at least a partial region of an inner surface of the recess.

Further, at least a partial region of the inner surface of the recess and the second side surface are both arc-shaped surfaces.

Furthermore, the supporting piece also comprises a third side face, the orthographic projections of the supporting piece on a preset plane vertical to the turnover axis are triangular, and the orthographic projections of the first side face, the second side face and the third side face on the preset plane form three sides of the triangle; the inner surface of the recess comprises a first inner surface and a second inner surface connected to each other, the second inner surface is located on a side of the first inner surface away from the first region, the second side surface is engaged with the first inner surface, and the third side surface is engaged with the second inner surface.

Further, when one of the bearing areas is turned to a position opposite to the other bearing area, the first side face can be matched with the flexible display panel, and the second side face is coplanar with the surface of the first area facing the flexible display panel.

Further, the area of the bottom of the recess is smaller than the area of the opening of the recess.

Further, the length of the first region is greater than the length of the recess in a direction perpendicular to the flip axis.

Further, the bearing area also comprises a third area, the third area is positioned on one side of the depressed part far away from the first area, and in the direction perpendicular to the overturning axis, the length of the depressed part is greater than that of the third area.

Furthermore, the part of the third area higher than the depressed part is a rib structure, and the extending direction of the rib structure is parallel to the overturning axis.

According to an aspect of the present disclosure, a display module is provided, including a flexible display panel and the folding structure, the flexible display panel includes a first bending region and a second bending region contacting with the first bending region, an orthographic projection of the spacer region on the flexible display panel covers the first bending region, and an orthographic projection of the recess portion on the flexible display panel is located in the second bending region.

Further, the first region is fixedly connected with the flexible display panel.

Furthermore, a stainless steel supporting layer is arranged on one side, facing the bearing assembly, of the flexible display panel, and the supporting piece is fixedly connected with the stainless steel supporting layer, or the supporting piece and the stainless steel supporting layer are integrally formed.

According to one aspect of the disclosure, a display device is provided, which comprises the display module.

According to the display device, the display module and the folding structure, when the display device is used for bearing a flexible display panel, one bearing area can be turned over relative to the other bearing area, so that the flexible display panel can be folded through the folding mechanism; because support piece rotates when predetermineeing the position, support piece can with by the contact of folding flexible display panel, and simultaneously, the free end is located the link and is close to one side of compartment, and the support piece that is located predetermineeing the position forms an contained angle with the bearer region, thereby the regional relative bearer region that makes flexible display panel and support piece contact has also taken place to buckle, reduce the regional degree of buckling of flexible display panel corresponding to the compartment, the deformation in this region has been reduced, thereby flexible display panel's inefficacy risk has been reduced, make flexible display panel can realize littleer radius of buckling.

Drawings

Fig. 1 is a schematic view of a folding display device in the related art.

Fig. 2 is a strain diagram of a flexible display panel of a folding display device in the related art.

Fig. 3 is a schematic view of a folded display device of an embodiment of the present disclosure when unfolded.

Fig. 4 is a schematic view of the folded display device of the embodiment of the present disclosure after being folded.

Fig. 5 is a schematic view of a folding mechanism of an embodiment of the present disclosure.

Fig. 6 is a plan view schematic of a load bearing assembly of an embodiment of the present disclosure.

Figure 7 is another plan view schematic of a load bearing assembly of an embodiment of the present disclosure.

Fig. 8 is a schematic plan view of a folding mechanism of an embodiment of the present disclosure.

Fig. 9 is a schematic view of a load bearing zone in a folding mechanism of an embodiment of the present disclosure.

FIG. 10 is another schematic view of a load bearing zone in a folding mechanism of an embodiment of the present disclosure.

Fig. 11 is a schematic view of a display module according to an embodiment of the disclosure.

Fig. 12 is a schematic view of a stainless steel support layer in a display module according to an embodiment of the disclosure.

FIG. 13 is a diagram illustrating the results of a simulation test.

FIG. 14 is a graph showing the results of another simulation test.

Description of reference numerals: 1. a load-bearing zone; 101. a recessed portion; 102. a first region; 103. a third region; 1011. a first inner surface; 1012. a second inner surface; 102. a first region; 103. a third region; 104. a rib structure; 2. a spacer region; 3. a support member; 301. a connecting end; 302. a free end; 303. a first side surface; 304. a second side surface; 305. a third side; 4. a flexible display panel; 401. a first bending region; 402. a second bending region; 5. folding the board; 6. a polarizer; 7. a cover plate; 8. a heat dissipation film layer; 9. a stainless steel support layer; 9011. and a through hole.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Rather, they are merely examples of devices consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in the description and claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "a number" means two or more. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this disclosure and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

In the related art, as shown in fig. 1, after the flexible display panel 4 supported by the folding plate 5 is bent, the strain of the a region (bending starting point) of the flexible display panel 4 is large (as shown in fig. 2), so that the flexible display panel 4 has a high failure risk, and further development of the folding display device is limited.

The embodiment of the disclosure provides a folding structure for folding a flexible display panel. As shown in fig. 3 and 4, the folding structure may comprise a load bearing assembly and a support 3, wherein:

the carrier assembly is for carrying a flexible display panel 4. As shown in fig. 6, the load bearing assembly comprises at least two load bearing zones 1. Two adjacent carrier regions 1 are disposed at an interval to form a spacer region 2 between the two carrier regions 1. One carrying area 1 of two adjacent carrying areas 1 can be turned over relative to the other carrying area 1 to fold or unfold the flexible display panel 4. As shown in fig. 5 and 8, the support member 3 includes opposite connecting ends 301 and free ends 302. The connection end 301 is connected to a side of the carrier region 1 facing the flexible display panel 4. The free end 302 is capable of rotating relative to the attachment end 301, and the axis of rotation of the free end 302 is parallel to the flip axis. Wherein, in the process of turning over to fold flexible display panel 4 at two adjacent load-bearing regions 1, support piece 3 can rotate to the preset position of contacting with flexible display panel 4, and free end 302 of support piece 3 located at the preset position is located at one side of connecting end 301 close to spacer region 2, and support piece 3 located at the preset position forms an included angle with load-bearing region 1.

When the folding mechanism of the embodiment of the present disclosure is used for bearing the flexible display panel 4, one bearing area 1 can be turned over relative to another bearing area 1, so that the flexible display panel 4 can be folded by the folding mechanism; because support piece 3 rotates when predetermineeing the position, support piece 3 can contact with the flexible display panel 4 by the folding, and simultaneously, free end 302 is located one side that link 301 is close to compartment 2, and support piece 3 that is located the position of predetermineeing forms an contained angle with load-bearing area 1, thereby the regional relative load-bearing area 1 that makes flexible display panel 4 and support piece 3 contact has also taken place to buckle, reduce the regional degree of buckling of flexible display panel 4 corresponding to compartment 2, the deformation in this region has been reduced, thereby the failure risk of flexible display panel 4 has been reduced, make flexible display panel 4 can realize littleer radius of buckling.

The following describes each part of the folding mechanism according to the embodiment of the present disclosure in detail:

as shown in fig. 6, the carrier assembly is plate-shaped to carry the flexible display panel 4, and the carrier assembly can be folded. Wherein the load bearing assembly may comprise two, three, four or more load bearing areas 1. The plurality of carrying areas 1 carry a flexible display panel 4 together. When the load bearing assembly is unfolded, that is, when the load bearing assembly is in the unfolded state, the plurality of load bearing regions 1 may be distributed along the first direction (X direction in fig. 6), and two adjacent load bearing regions 1 may be disposed at an interval to form a spacing region 2 between the two adjacent load bearing regions 1. The spacers 2 each extend along the second direction (Y direction in fig. 6). The second direction may be perpendicular to the first direction. Wherein the number of the spacer regions 2 may be one less than the number of the carrier regions 1. For example, the carrier assembly may include a plurality of carrier plates, two adjacent carrier plates are disposed at an interval, each carrier plate forms the carrier region 1, and the interval region between two carrier plates forms the interval region 2 of the carrier assembly.

One carrying area 1 of the two adjacent carrying areas 1 can be turned over relative to the other carrying area 1, and the turning axis of the carrying area 1 can be parallel to the second direction and perpendicular to the first direction. Taking the number of the carrying areas 1 as two as an example, as shown in fig. 4, when one carrying area 1 is turned over to a first position relative to another carrying area 1, the two carrying areas 1 are arranged oppositely, and the carrying assembly is in a folded state to fold the flexible display panel 4; as shown in fig. 3, when one carrying region 1 is turned to a second position relative to the other carrying region 1, at least partial areas of the surfaces of the two carrying regions 1 facing the flexible display panel 4 are coplanar, and the carrying assembly is in an unfolded state to unfold the flexible display panel 4. During folding of the flexible display panel 4, the area of the flexible display panel 4 corresponding to the spacer 2 is also folded around a bending axis. The bending axis may be parallel to or coincident with the flip axis.

As shown in fig. 5 and 7, each of the above-mentioned carrier areas 1 may include a first area 102 and a second area. The first region 102 and the second region may be distributed along the first direction, and the second region is located between the first region 102 and the spacer 2. In the second direction, the length of the first region 102 and the length of the second region are equal to the length of the carrier region 1. The side of the second area facing the flexible display panel 4 is provided with a recess 101. The recess 101 may be in contact with the first region 102, and a boundary line of the recess 101 and the first region 102 may be parallel to the second direction. The surface of the first region 102 facing the flexible display panel 4 may be planar. Further, in the first direction, the length of the first region 102 may be greater than the length of the recess 101. As shown in fig. 7, the load bearing zone 1 of the present disclosure may further include a third region 103. The third region 103 may be located on a side of the recess 101 away from the first region 102, and the third region 103 may be in contact with the recess 101. In the first direction, the length of the recess 101 may be greater than the length of the third region 103. As shown in fig. 9 and 10, the portion of the third region 103 higher than the recess 101 is a rib structure 104, and the extending direction of the rib structure 104 may be parallel to the turning axis. The surface of the ridge structure 104 facing the first region 102 may constitute a partial region of the inner surface of the recess 101. The bottom area of the recess 101 may be smaller than the opening area of the recess 101. Further, from the bottom of the recess 101 to the opening of the recess 101, the cross-sectional area of the recess 101 gradually increases, i.e., the recess 101 is of a flared structure.

As shown in fig. 9, the inner surface of the recess 101 may include a first inner surface 1011 and a second inner surface 1012 that are connected to each other. The second inner surface 1012 may be located on a side of the first inner surface 1011 remote from the first region 102. The second inner surface 1012 may be the surface of the rib structure 104 facing the first region 102, but the disclosure is not limited thereto. In an embodiment of the present disclosure, the first inner surface 1011 and the second inner surface 1012 are both planar, and a boundary line between the first inner surface 1011 and the second inner surface 1012 may be parallel to the second direction. In another embodiment of the present disclosure, the first inner surface 1011 is an arc-shaped surface, the second inner surface 1012 is a plane, and a boundary line between the first inner surface 1011 and the second inner surface 1012 is parallel to the second direction. In other embodiments of the present disclosure, the first inner surface 1011 and the second inner surface 1012 are both arc-shaped surfaces, and the first inner surface 1011 and the second inner surface 1012 are smoothly transited.

As shown in fig. 5, the support 3 may comprise a first side 303, the first side 303 being capable of being attached to the flexible display panel 4. The first side 303 may include two opposing sides, both of which are parallel to the flip axis. The support member 3 comprises opposite ends, one end being a connecting end 301 and the other end being a free end 302. Of the two opposite sides of the first side 303, one side is located at the connecting end 301, and the other side is located at the free end 302. The connecting end 301 is connected to a side of the carrying region 1 facing the flexible display panel 4, the free end 302 can rotate relative to the connecting end 301, and a rotation axis of the free end 302 is parallel to the flipping axis, that is, the supporting member 3 is rotatably connected to the carrying region 1, and a rotation axis of the supporting member 3 is parallel to the flipping axis. Wherein, the connecting end 301 of the supporting member 3 can be connected to the first region 102. Specifically, the connecting end 301 may be connected to the carrying area 1 by a hinge, but the embodiment of the present disclosure is not particularly limited thereto. It should be noted that the free end 302 may be located on a side of the connecting end 301 close to the spacer 2 when the support 3 is rotated to the preset position.

As shown in fig. 3, 5 and 9, taking the bearing area 1 including the recess 101 as an example, the support 3 can enter the recess 101 under the rotation of the free end 302, and of course, the support 3 can leave the recess 101 under the rotation of the free end 302. Taking the example that the support 3 comprises the first side 303 and the second side 304, after the support 3 enters the recess 101, the first side 303 may be coplanar with the surface of the first region 102 facing the flexible display panel 4 to improve the flatness of the flexible display panel 4 supported by the first side 303 and the first region 102, while the second side 304 cooperates with at least a partial region of the inner surface of the recess 101. It should be noted that "after the support 3 enters the recess 101" in the present disclosure means that "the support 3 completely enters the recess 101", that is, "the support 3 abuts against the inner surface of the recess 101". Taking the example that the inner surface of the recess 101 includes the first inner surface 1011 and the second inner surface 1012, the support 3 may further include the third side surface 305, after the support 3 enters the recess 101, the second side surface 304 may be matched with the first inner surface 1011, that is, the second side surface 304 is attached to the first inner surface 1011, and the second side surface 304 is similar to the first inner surface 1011 in shape and contour; the third side 305 may be matched with the second inner surface 1012, that is, the third side 305 is attached to the second inner surface 1012, and the third side 305 and the second inner surface 1012 have the same shape and contour. When the first inner surface 1011 is an arc surface, the second side 304 may also be an arc surface; when the first inner surface 1011 is planar, the second side 304 is planar. Taking the second side 304 as a plane, when one of the carrier regions 1 is flipped to a position opposite to the other carrier region 1, the second side 304 is coplanar with the surface of the first region 102 facing the flexible display panel 4, and the first side 303 is engaged with the flexible display panel 4.

The orthographic projection of the support 3 on the preset plane may be triangular. The preset plane is perpendicular to the overturning axis. The orthographic projections of the first side 303, the second side 304 and the third side 305 of the support 3 on a predetermined plane constitute three sides of the triangle. The triangle may be a right triangle, and the second side 304 and the third side 305 are vertically disposed. The number of the supporters 3 may be twice as many as the number of the above-mentioned spacers 2, and one supporter 3 is provided at both sides of each spacer 2.

The embodiment of the disclosure also provides a display module. The display module may comprise a flexible display panel 4 and the folding structure of any of the above embodiments. The flexible display panel 4 includes a substrate, an array substrate, a light emitting layer, an encapsulation layer, and a touch layer (FMLOC) stacked together. The encapsulation layer is a thin film encapsulation layer (TFE), which may include a first inorganic encapsulation layer, an organic layer, and a second inorganic encapsulation layer in a stacked arrangement. Of course, as shown in fig. 11, the display module may further include a polarizer 6, a cover plate 7, a heat dissipation film 8, and a stainless steel support layer 9. The polarizer 6 is disposed on the touch layer, and the cover plate 7 is disposed on a side of the polarizer 6 opposite to the touch layer. The heat dissipation film layer 8 may be disposed on a side of the substrate of the flexible display panel 4 facing away from the array substrate. The heat dissipation film layer 8 may include an EMBO (embossed silica gel buffer material) layer, a Foam layer, a PI (polyimide film) layer, a Cu (copper) foil layer, a wave-absorbing material layer, and the like, which are sequentially disposed. The stainless steel support layer 9 may be disposed on a side of the heat dissipation film layer 8 opposite to the polarizer 6.

As shown in fig. 3 and 4, the flexible display panel 4 may be supported at a plurality of carrying areas 1 of a carrying assembly. Specifically, the flexible display panel 4 may be carried in the first region 102 of each carrying area 1. The first region 102 may be fixedly connected with the flexible display panel 4, for example, adhered, but the disclosed embodiments are not limited thereto. The flexible display panel 4 may comprise a bending region. The bending region may include a first bending region 401 and a second bending region 402 in contact with the first bending region 401. The orthographic projection of the spacer region 2 of the bearing assembly on the flexible display panel 4 covers the first bending region 401, and the orthographic projection of the concave part 101 on the bearing region 1 on the flexible display panel 4 is positioned in the second bending region 402. The number of the first bending regions 401 may be multiple, the multiple first bending regions 401 correspond to the multiple spacing regions 2 in a one-to-one correspondence, and two sides of any one of the first bending regions 401 may be respectively provided with a second bending region 402. The support 3 of the present disclosure may be fixedly connected, e.g., bonded, with the flexible display panel 4. In particular, the support 3 of the present disclosure may be fixedly connected with the flexible display panel 4. Specifically, the present disclosure may be fixedly connected with the stainless steel support layer 9 described above. In other embodiments of the present disclosure, the support 3 may also be integrally formed with the flexible display panel 4. In particular, the support 3 may be integrally formed with a stainless steel support layer 9. As shown in fig. 12, the stainless support layer 9 is provided with an opening area 901 in a region corresponding to the above-mentioned bending area. The opening region 901 is provided with a plurality of through holes 9011 distributed in an array. To improve the bending performance of the open area 901.

Further, taking the bending radius of the first bending region 401 of the flexible display panel 4 as an example of 3mm, after the support 3 enters the recess 101, the length of the support 3 in the first direction may be 4mm-12mm, such as 4mm, 6mm, 7mm, 8mm, 12mm, etc.; the second side 304 of the support 3 is an arc-shaped surface, and the central angle of the second side 304 may be 1.28 ° to 12 °, for example, 1.28 °, 4 °, 8 °, 10 °, 11 °, 12 °, and so on.

The embodiment of the disclosure also provides a display device. The display device may include the display module described in the above embodiments. The display device can be a mobile phone, a tablet computer, a television and the like.

The folding mechanism, the display panel and the display device provided by the embodiment of the disclosure belong to the same inventive concept, and the description of the relevant details and the beneficial effects can be referred to each other and are not repeated.

Simulation test

One, compare with the folding display device that does not set up support piece 3, the failure risk greatly reduced of the folding display device of this disclosure, the concrete expression is: the strain value of the second inorganic packaging layer is reduced to 0.8 from 1, the strain value of the first inorganic packaging layer is reduced to 0.9 from 1, the strain value of the touch layer is reduced to 0.8 from 1, and the strain can be reduced by 10% -20%.

Secondly, a foldable display device without the support 3 and a plurality of foldable display devices according to the embodiments of the present disclosure are provided. With the plurality of folding display devices of the present disclosure, the lengths of the supports 3 thereof (the lengths of the supports 3 in the first direction after entering the recess 101) are 4mm, 6mm, 8mm, 12mm in this order. Regarding the second inorganic encapsulation layer, the strain of the folded display device in which the support 3 is not disposed is regarded as 1; the resulting folded display device with a support 3 length of 8mm was tested for minimal strain, which was less than 0.8. The test result is shown in fig. 13, and in fig. 13, the length of the supporting member 3 is 0mm, which represents the folding display device without the supporting member 3.

Thirdly, providing a folding display device without the support 3 and a plurality of folding display devices of the embodiments of the present disclosure. For the multiple-fold display devices of the present disclosure, the central angle of the second side 304 of the support 3 is 1.28 °, 4 °, 8 °, 10 °, 11 °, 12 ° in this order. Regarding the second inorganic encapsulation layer, the strain of the folded display device in which the support 3 is not disposed is regarded as 1; the folded display device having a 12 ° central angle of second side 304 was tested for minimal strain, which was close to 0.8. The test results are shown in fig. 14. In fig. 14, the central angle "none" represents the folded display device without the support 3.

Although the present disclosure has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure.

Claims

1. A folding structure for folding a flexible display panel, comprising:

2. The folding structure of claim 1, wherein the carrying region comprises a first region and a second region, the second region is located on a side of the first region close to the spacer region, a side of the second region facing the flexible display panel is provided with a recess, and the support member can enter/exit the recess under rotation of the free end.

3. The folding structure of claim 2, wherein the support member comprises a first side and a second side, the first side being coplanar with a surface of the first region facing the flexible display panel after the support member enters the recess, the second side engaging at least a portion of an inner surface of the recess.

4. A fold construction according to claim 3, wherein at least a part of the area of the inner surface of the recess and the second side are both arcuate.

5. The folding structure of claim 3, wherein said support member further comprises a third side surface, an orthographic projection of said support member on a predetermined plane perpendicular to said flip axis is triangular, and orthographic projections of said first side surface, said second side surface, and said third side surface on said predetermined plane form three sides of said triangle; the inner surface of the recess comprises a first inner surface and a second inner surface connected to each other, the second inner surface is located on a side of the first inner surface away from the first region, the second side surface is engaged with the first inner surface, and the third side surface is engaged with the second inner surface.

6. The folding structure of claim 5, wherein the first side is capable of engaging the flexible display panel when one of the carrier regions is flipped to a position opposite to the other carrier region, and the second side is coplanar with a surface of the first region facing the flexible display panel.

7. The folding structure of claim 2 wherein the area of the bottom of the recess is less than the area of the opening of the recess.

8. The folding structure of claim 2 wherein the length of the first region is greater than the length of the recess in a direction perpendicular to the flip axis.

9. The folding structure of claim 2 wherein the carrier region further comprises a third region on a side of the depression remote from the first region, the depression having a length greater than a length of the third region in a direction perpendicular to the flip axis.

10. The folded structure of claim 9, wherein the portion of the third region above the recess is a fin structure extending parallel to the flip axis.

11. A display module according to any one of claims 2 to 7, comprising a flexible display panel and the folding structure of any one of claims 2 to 7, wherein the flexible display panel comprises a first bending region and a second bending region in contact with the first bending region, an orthographic projection of the spacer region on the flexible display panel covers the first bending region, and an orthographic projection of the recess portion on the flexible display panel is located in the second bending region.

12. The display module of claim 11, wherein the first region is fixedly connected to the flexible display panel.

13. The display module assembly of claim 11, wherein a side of the flexible display panel facing the carrier assembly is provided with a stainless steel support layer, and the support member is fixedly connected to the stainless steel support layer, or the support member and the stainless steel support layer are integrally formed.

14. A display device comprising the display module according to any one of claims 11 to 13.