CN107403590B

CN107403590B - Foldable display device

Info

Publication number: CN107403590B
Application number: CN201710769737.3A
Authority: CN
Inventors: 袁世鹏; 冯鹤冰; 高超民
Original assignee: Shanghai Tianma Microelectronics Co Ltd
Current assignee: Shanghai Tianma Microelectronics Co Ltd
Priority date: 2017-08-31
Filing date: 2017-08-31
Publication date: 2021-04-13
Anticipated expiration: 2037-08-31
Also published as: CN107403590A

Abstract

The present application relates to a foldable display device. The display device comprises a flexible display screen and a supporting body, wherein the supporting body comprises a plurality of first grooves and a plurality of second grooves, the positions of the first grooves are first folding positions, the positions of the second grooves are second folding positions, the foldable display device has a first folding state, the display surface is wrapped in the supporting body in the first folding state, or the foldable display device has a second folding state, the display surface is exposed out of the supporting body in the second folding state, or the foldable display device has a third folding state, part of the display surface is wrapped in the supporting body in the third folding state, and the rest of the display surface is exposed out of the supporting body. In the scheme, the folding mode of the flexible display device is more diversified, the requirements of various different applications of the foldable display device can be met, and the folding flexibility of the foldable display device is improved.

Description

Foldable display device

Technical Field

The application relates to the technical field of display, in particular to a foldable display device.

Background

With the development of science and technology, portable devices have become a new development trend in modern society, gradually change the lives of human beings, and bring about great changes to science and technology.

In particular, the flexible display device is increasingly favored by users due to advantages of being foldable, convenient to carry, wide in application range and the like, and gives users a brand-new viewing experience.

In the related art, there is a foldable display device in which a display screen is exposed after being folded, and the foldable display device has a single folding mode and poor folding flexibility, and cannot meet the requirements of various applications of the foldable display device.

Disclosure of Invention

The application provides a foldable display device, which can improve the folding flexibility of the foldable display device.

The application provides a foldable display device, having a folded state and an unfolded state, comprising:

the flexible display screen comprises a display surface and a non-display surface; and

a support body attached to the flexible display screen, the support body including a first surface and a second surface that are oppositely disposed in a thickness direction of the flexible display screen, the first surface being provided with a plurality of first grooves, the second surface being provided with a plurality of second grooves,

wherein the positions of the first grooves are first folding positions, the positions of the second grooves are second folding positions, and,

the foldable display device is folded at the first folding position to form a first folded state in which the display surface is wrapped within the support body,

or

The foldable display device is folded at the second folding position to form a second folding state, in which the display surface is exposed outside the supporting body,

or

The foldable display device is folded at the first folding position and the second folding position to form a third folding state, and in the third folding state, one part of the display surface is wrapped in the supporting body, and the rest part of the display surface is exposed outside the supporting body.

The technical scheme provided by the application can achieve the following beneficial effects:

the application provides a foldable display device, wherein, the double-phase relative surface of supporting the main part is provided with a plurality of first recesses and a plurality of second recess respectively, and the position at a plurality of first recesses place is first folding position, and the position at a plurality of second recesses place is second folding position, and because first recess and second recess are seted up respectively in the different surface of supporting the main part, make flexible display screen have the folding mode of multiple difference from this. One way is that the flexible display screen is folded at the first groove, at this time, the display surface is wrapped inside the support main body; the other mode is that the flexible display screen is folded at the second groove, and at the moment, the display surface is exposed outside the support main body; the third mode is that the flexible display screen is folded at the first groove and the second groove respectively, at this time, one part of the display surface is wrapped inside the supporting main body, and the rest part is exposed outside the supporting main body. Therefore, the folding mode of the flexible display device is more diversified, the requirements of various different applications of the foldable display device can be met, and the folding flexibility of the foldable display device is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

Fig. 1 is a schematic view of a foldable display device provided in an embodiment of the present application in an unfolded state;

FIG. 2 is a schematic diagram of a first embodiment of a foldable display device in a folded state according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a second embodiment of a foldable display device in a folded state according to an embodiment of the present application;

FIG. 4 is a schematic diagram of another embodiment of a foldable display device in a folded state according to an embodiment of the present application;

FIG. 5 is a schematic diagram of another embodiment of a foldable display device in a folded state according to an embodiment of the present application;

FIG. 6 is a schematic diagram of another embodiment of a foldable display device in a folded state according to an embodiment of the present application;

FIG. 7 is a schematic diagram of another embodiment of a foldable display device in a folded state according to an embodiment of the present application;

FIG. 8 is a schematic view of a support body in a split structure according to an embodiment of the present disclosure;

FIG. 9 is a schematic view of a support body as a frame according to an embodiment of the present disclosure;

FIG. 10 is a schematic view of a support body according to an embodiment of the present disclosure, wherein a first groove is fully distributed on a first surface and a second groove is fully distributed on a second surface;

fig. 11 is a schematic view of a supporting body provided in the embodiment of the present application, in which the first groove and the second groove are both triangular grooves;

FIG. 12 is a schematic view of an embodiment of a locking mechanism in a foldable display device according to an embodiment of the present application;

fig. 13 is a schematic view illustrating that the first suction surface and the second suction surface are both inclined surfaces in the locking mechanism according to the embodiment of the present application;

fig. 14 is a schematic view illustrating an embodiment of a foldable display device according to an embodiment of the present disclosure, wherein the first magnetic portion and the second magnetic portion are in an attraction state;

fig. 15 is a schematic view illustrating an embodiment in which a first magnetic portion and a second magnetic portion are overlapped in an attraction state in a foldable display device according to an embodiment of the present application;

fig. 16 is a schematic view of another embodiment in which the first magnetic part and the second magnetic part are overlapped in an attraction state in the foldable display device provided in the embodiment of the present application.

Reference numerals:

1-a foldable display device;

11-a flexible display screen;

111-a display surface;

112-non-display surface;

12-a support body;

121-a first surface;

121 a-first groove

122-a second surface;

122 a-a second groove;

12 a-a first portion;

12 b-a second part;

123-a first border;

124-a second bezel;

13-a locking mechanism;

131-a first magnetic part;

131 a-a first absorption surface;

132-a second magnetic part;

132 a-a second attraction surface;

131' -a first locking mechanism;

132' -a second locking mechanism;

14-winding mechanism.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

Detailed Description

The present application is described in further detail below with reference to specific embodiments and with reference to the attached drawings.

It should be noted that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it should also be understood that when an element is referred to as being "on" or "under" another element, it can be directly formed on "or" under "the other element or be indirectly formed on" or "under" the other element through intervening elements.

The application provides a collapsible display device 1, it has fold condition and expansion state, and under expansion state, collapsible display device 1 can be with the maximum area display image, and under fold condition, collapsible display device 1 can be with less area display image, and the shared space of collapsible display device 1 after folding reduces, and convenience of customers carries.

Specifically, referring to fig. 1, fig. 1 shows a schematic diagram of a foldable display device in an unfolded state. The foldable display device 1 comprises a flexible display 11 and a support body 12, wherein the flexible display 11 comprises a display surface 111 and a non-display surface 112, and the support body 12 is attached to the flexible display 11 and can provide support and protection for the flexible display 11.

In the embodiment shown in fig. 1, the support main 12 may be attached to the display surface 111 of the flexible display screen 11 by one approach; alternatively, the support body 12 may be attached to the non-display surface 112 of the flexible display 11, and the position of the support body 12 attached to the flexible display 11 may be selected according to actual situations. In this case, in the first embodiment, the supporting body 12 may be made of a transparent material so that the supporting body 12 does not affect the display of the display surface 111.

The support body 12 includes a first surface 121 and a second surface 122 oppositely disposed in a thickness direction of the flexible display 11, the first surface 121 is provided with a plurality of first grooves 121a, the second surface 122 is provided with a plurality of second grooves 122a, each first groove 121a is recessed from the first surface 121 toward a side close to the second surface 122, and each second groove 122a is recessed from the second surface 122 toward a side of the first surface 121.

In the above-described aspect, due to the arrangement of the plurality of first grooves 121a and the arrangement of the plurality of second grooves 122a, the bending strength of the support body 12 is weakened, and conversely, the ability to bend and deform can be strengthened, and the support body 12 can be easily bent at the plurality of first grooves 121a and the plurality of second grooves 122a, whereby the positions of the plurality of first grooves 121a can be set as the first folding positions of the foldable display device 1, and the positions of the plurality of second grooves 122a can be set as the second folding positions of the foldable display device 1, that is, the foldable display device 1 can be folded at the first folding positions and the second folding positions, respectively, so that the foldable display device 1 is switched from the unfolded state to the folded state.

Referring to fig. 2, fig. 2 is a schematic diagram illustrating a first embodiment of a foldable display device in a folded state. As can be seen from fig. 2, the foldable display device 1 is folded at the first folding position, and after the folding, the flexible display 11 is folded in half, and the display surface 111 is opposite.

Referring to fig. 3, fig. 3 shows a schematic view of a second embodiment of the foldable display device in a folded state. As can be seen from fig. 3, the foldable display device 1 is folded at the first folding position, and after folding, the flexible display 11 forms a winding structure, and the display surface 111 is wound inside the foldable display device 1.

Referring to fig. 4, fig. 4 is a schematic view showing still another embodiment of the foldable display device in a folded state. The foldable display device 1 is folded at the first folding position, and the edge portions of the two ends of the flexible display 11 are bent toward the middle portion, and after folding, the display surfaces of the edge portions are opposite to the display surface 111 of the middle portion.

In the embodiment shown in fig. 2 to 4, when the foldable display device 1 is folded, the display surface 111 is completely wrapped in the support body 12, and this folded state is referred to as a first folded state, and in this folded state, the display surface 111 is wrapped in the inside of the support body 12, so that the risk of damage to the display surface 111 is reduced.

Referring to fig. 5, fig. 5 shows a schematic view of yet another embodiment of a foldable display device in a folded state. In fig. 5, the foldable display device 1 is folded only at the second folding position, and after the folding, the flexible display 11 is folded in half, and the display surface 111 is opposite to the back.

Referring to fig. 6, fig. 6 is a schematic view showing still another embodiment of the foldable display device in a folded state. In fig. 6, the foldable display device 1 is folded at the second folding position, and the edge portions of the two ends of the flexible display screen 11 are bent toward the middle portion, and after the folding, the display surfaces 111 of the edge portions are opposite to the display surface 111 of the middle portion.

In the embodiment shown in fig. 5 to 6, when the foldable display device 1 is folded, the display surface 111 is completely exposed from the supporting body 12, and the folded state is referred to as a second folded state, in which the display surface 111 is defined into a plurality of portions by the folded position, at least one of the portions can be used for displaying to meet the reading and learning requirements of the user.

With continued reference to fig. 7, fig. 7 shows a schematic view of yet another embodiment of a foldable display device in a folded state.

In the embodiment shown in fig. 7, the foldable display device 1 is folded at the first folding position and the second folding position respectively, after the folding, a part of the display surface 111 is wrapped in the supporting body 12, and the rest is exposed outside the supporting body 12, the folding state is referred to as a third folding state, and in the third folding state, a part of the display surface 111 exposed outside the supporting body 12 can be used for displaying, which can also meet the use requirements of the user for reading and learning.

As can be seen from the above description, the foldable display device 1 provided in the present application has a plurality of folding states, i.e., a first folding state, a second folding state, and a third folding state, in the above three folding states, different requirements of a user can be met, specifically, in the first folding state, the display surface 111 can be prevented from being damaged, and the display surface 111 can be well protected; under second folded state and third folded state, both satisfied user's user demand, reduced collapsible display device 1's volume again, made things convenient for collapsible display device 1 to carry.

In the embodiment shown in fig. 1-7, the support body 12 is a one-piece structure, wherein the first surface 121 and the second surface 122 are two surfaces of the support body 12 that are oppositely disposed along the thickness direction of the flexible display 11. It should be noted, however, that the support body 12 is not limited to that shown in fig. 1-7, and that in other embodiments, the support body 12 may have other alternatives.

Referring to fig. 8, fig. 8 is a schematic view of another embodiment of the support body.

Optionally, the support body 12 includes a first portion 12a and a second portion 12b, and the flexible display 11 is sandwiched between the first portion 12a and the second portion 12b, in this embodiment, the first surface 121 is a side surface of the first portion 12a away from the second portion 12b, and the second surface 122 is a side surface of the second portion 12b away from the first portion 12 a.

In the embodiment shown in fig. 8, the supporting body 12 is a split structure, the flexible display 11 is located between the first portion 12a and the second portion 12b, in the folded state, the flexible display 11 is in a neutral plane, the flexible display 11 deforms relatively less under the action of the folding force, and the length of the flexible display 11 is less affected by the change of the state of the flexible display, so that the damage of the flexible display 11 in the frequent switching process of unfolding and folding can be reduced, and the service life of the flexible display 11 can be prolonged.

It is understood that the first portion 12a can be connected to the display surface 111 and the second portion 12b can be connected to the non-display surface 112, or vice versa. Here, taking the example that the first portion 12a is attached to the display surface 111, in the present embodiment, in order not to affect the display effect of the display surface 111, the first portion 12a is disposed along the edge of the flexible display 11. In one embodiment, the first portion 12a may have a through hole, through which the display area of the display surface 111 is exposed, so as to avoid shielding the display area and affecting the display effect; on the other hand, since the second portion 12b is attached to the non-display surface 112, the specific structure of the second portion 12b may not be limited.

Referring to fig. 9, fig. 9 is a schematic view showing the supporting body as a frame. Specifically, the support body 12 is integrally provided as a frame body extending along the edge of the flexible display screen 11, and includes a first frame 123 and a second frame 124 which are parallel to each other, in this case, a plurality of first folding positions may be provided on both the first frame 123 and the second frame 124, and each first folding position located on the first frame 123 may be directly opposite to each first folding position located on the second frame 124. After the arrangement, the flexible display screen 11 can be folded at two opposite first folding positions, so that on one hand, the folding position of the flexible display screen 11 can be well controlled, and the deviation of the folding position cannot occur at one side where the first folding position is not arranged; on the other hand, the folding degree of the flexible display screen 11 can be easily controlled, and the folding difficulty of the flexible display screen 11 can be reduced.

It should be noted that, a plurality of second folding positions may be provided on both the first frame 123 and the second frame 124, and the same arrangement is provided for each second folding position on the first frame 123 and each second folding position on the second frame 124. In this scheme, the setting manner of the second folding position is the same as that of the first folding position, and the technical effects are the same, which are not described herein again.

It should be noted that, in the solution that the supporting main body 12 is a split structure, the first portion 12a and the second portion 12b may be both provided as a frame, wherein the first portion 12a is attached at the edge of the display surface 111, and the second portion 12b is attached at the edge of the non-display surface 112.

In addition, the present application does not limit the area where the first folding position and the second folding position are located on the supporting body 12, that is, the positions of the first folding position and the second folding position on the supporting body 12 can be selected according to the requirement.

In the embodiment shown in fig. 9, the first folding position and the second folding position are opposite to each other in the thickness direction of the flexible display 11, that is, the position of each first groove 121a is opposite to the position of each second groove 122a in the thickness direction of the flexible display 11, so that the foldable display device 1 can be folded at a fixed position, and the damage to the flexible display 11 caused by the user selecting the folding position at will can be avoided.

It is easily understood that the first folding position and the second folding position on the support main 12 are not limited to the case shown in fig. 9, and further, the first bezel 123 and the second bezel 124 may be respectively provided with more first folding positions and second folding positions according to the folding manner of the foldable display device 1.

Referring to fig. 10, fig. 10 is a schematic diagram illustrating a first surface with a first groove and a second surface with a second groove.

Alternatively, the first groove 121a may be disposed to cover the first surface 121, or the second groove 122a may cover the second surface 122, in which case, the foldable display device 1 may be folded at any position of the support body 12, so as to improve the flexibility of the foldable display device 1 when being folded.

In the above embodiments, the shapes of the first grooves 121a and the second grooves 122a may be selected according to actual situations, the plurality of first grooves 121a at least include one of a trapezoid groove and a triangle groove, and/or the plurality of second grooves 122a at least include one of a trapezoid groove and a triangle groove.

Referring to fig. 10, for example, the first groove 121a and the second groove 122a may be both trapezoidal grooves, and the bottom of the trapezoidal groove is a plane, so that the deformation space is large and the deformation amount is large when the groove is folded.

Referring to fig. 11, fig. 11 shows a schematic diagram of the first and second grooves being triangular grooves.

Optionally, the first groove 121a and the second groove 122a may also be both triangular grooves, and the bottom of the triangular groove is a ridge, so that under the action of the folding force, the deformation amount of the triangular groove is relatively small, thereby preventing the flexible display 11 from generating large deflection deformation when folded, and avoiding dead fold after folded.

In other embodiments, the first grooves 121a may be trapezoidal grooves, and the second grooves 122a may be triangular grooves, or vice versa.

In this application, in order to maintain the foldable display device 1 in the folded state, the foldable display device 1 further includes a locking mechanism 13, and the locking mechanism 13 can ensure that the folded foldable display device 1 does not unfold by itself.

Referring to fig. 4, the locking mechanism 13 includes a first magnetic part 131 and a second magnetic part 132 disposed on the supporting body 12, and in the folded state, the first magnetic part 131 and the second magnetic part 132 are close to each other and attract each other to maintain the folded state.

In the embodiment shown in fig. 4, the first magnetic part 131 and the second magnetic part 132 are respectively disposed at two ends of the supporting body 12, and in the folded state, the first magnetic part 131 is abutted with the second magnetic part 132, specifically, the first magnetic part 131 has a first attraction surface 131a, the second magnetic part 132 has a second attraction surface 132a, and the first attraction surface 131a and the second attraction surface 132a are directly opposite to each other and abutted with each other. In this embodiment, the first magnetic part 131 and the second magnetic part 132 are closely attached without a gap therebetween, thereby improving the stability of the folded state.

Referring to fig. 12, fig. 12 shows a schematic view of another embodiment of the locking mechanism.

For the supporting body 12 with the split structure, the first magnetic part 131 and the second magnetic part 132 may respectively include two parts, and are respectively disposed on the first part 12a and the second part 12b, and when the foldable display device 1 is folded, the first magnetic parts 131 and the second magnetic parts 132 are attracted one by one.

Referring to fig. 13, fig. 13 is a schematic diagram showing the first suction surface and the second suction surface being inclined surfaces. Further, in order to increase the attraction area of the two magnetic portions, the first attraction surface 131a and the second attraction surface 132a may be both provided as inclined surfaces, and the inclined surfaces may be arranged in parallel.

The inclined surface has a larger area relative to the vertical surface, and according to the theory that the attraction force is in direct proportion to the attraction area, the attraction force can be increased by increasing the area of the attraction surface, so that the attraction reliability is improved, and the first magnetic part 131 and the second magnetic part 132 cannot be easily separated. Fig. 14 shows a schematic view of the first magnetic part 131 and the second magnetic part 132 in a state of being attracted.

Referring to fig. 15, fig. 15 is a schematic view illustrating the first magnetic part and the second magnetic part being overlapped with each other in a suction state. The first magnetic part 131 and the second magnetic part 132 may also overlap with each other, that is, after the first magnetic part 131 and the second magnetic part 132 are attracted, the first magnetic part 131 and the second magnetic part 132 are overlapped.

Referring to fig. 16, fig. 16 is a schematic diagram illustrating another embodiment in which the first magnetic part and the second magnetic part are overlapped with each other in a suction state.

It should be noted that the number of the first magnetic part 131 and the second magnetic part 132 can also be selected according to different folding manners of the foldable display device 1, for example, in the embodiment shown in fig. 4, the number of the first magnetic part 131 and the number of the second magnetic part 132 are respectively set to one; for another example, in the embodiment shown in fig. 8, two first magnetic parts 131 and two second magnetic parts 132 are provided; in other embodiments, the number of the first magnetic part 131 and the second magnetic part 132 may be more, which is not limited in this application.

On the other hand, the foldable display device 1 provided by the present application further comprises a winding mechanism 14, please refer to fig. 1, wherein one end of the winding mechanism 14 is connected to the supporting body 12, and the other end is connected to the flexible display 11, and the winding mechanism 14 is used for adjusting the length of the flexible display 11 when being unfolded and folded, so as to keep the display surface 111 thereof flat and without wrinkles.

Specifically, the winding mechanism 14 has a winding stroke and an unwinding stroke, and in a folded state, the folding force generates tensile stress on the flexible display screen 11, at this time, the length of the flexible display screen 11 is increased, and accordingly, the winding mechanism 14 needs to generate the unwinding stroke; on the contrary, in the unfolded state, the flexible display screen 11 returns to the original length, and at this time, the winding mechanism 14 generates a winding stroke to recover the flexible display screen 11, so as to achieve the purpose of adjusting the lengths of the display surface 111 in the folded state and the unfolded state, respectively.

The winding mechanisms 14 are usually connected to the end portions of the flexible display screen 11, and optionally, the number of the winding mechanisms 14 may be set to be multiple, each winding mechanism 14 may be respectively disposed at two ends of the flexible display screen 11, and the stress of the flexible display screen 11 during contraction and expansion is more uniform by the multiple winding mechanisms 14, so that damage to the flexible display screen 11 due to uneven stress at two ends is avoided. In the embodiment shown in fig. 1, the winding mechanisms 14 are two in number, one at each end of the support body 12.

In one embodiment, the winding mechanism 14 may be implemented by an elastic mechanism, specifically, the winding mechanism 14 includes an elastic member, one end of the elastic member is connected to the support main body 12, and the other end of the elastic member is connected to the flexible display screen 11, during the unfolding process of the flexible display screen 11, the unfolding force acts on the elastic member to generate a deformation stroke, and during the folding process of the flexible display screen 11, the folding force acts on the elastic member to generate a reset stroke.

The elastic body may be a volute spiral spring, an extension spring, a compression spring, a torsion spring, or the like, which is not limited in the present application.

Of course, the winding mechanism 14 is not limited to be implemented by an elastic mechanism, and in other embodiments, the winding mechanism may be implemented by other schemes.

In order to ensure the stability of the operation of the winding mechanism 14, the support body 12 may be provided with a receiving cavity, and the winding mechanism 14 is disposed in the receiving cavity, and the receiving cavity may serve as a position for providing a limit for the elastic body, so as to ensure that the elastic body is deformed only in a direction allowing the elastic body to be deformed, and the elastic body does not move in other directions.

With continued reference to fig. 11, for the supporting body 12 with the split structure, it can be further provided that the foldable display device 1 includes a plurality of first locking mechanisms 131 ', each of the plurality of first locking mechanisms 131 ' is disposed on the first portion 12a, and in the first folded state, each of the plurality of first locking mechanisms 131 ' is in one-to-one positioning engagement.

Similarly, the foldable display device 1 may also include a plurality of second locking mechanisms 132 ', and the plurality of second locking mechanisms 132 ' are disposed on the second portion 12b, and in the second folded state, the second locking mechanisms 132 ' are in one-to-one positioning engagement.

In the embodiment shown in fig. 11, the foldable display device 1 includes a plurality of first locking mechanisms 131 'and a plurality of second locking mechanisms 132', the plurality of first locking mechanisms 131 'are disposed on the first portion 12a, the plurality of second locking mechanisms 132' are disposed on the second portion 12b, and in the third folded state, the first locking mechanisms 131 'are in one-to-one positioning engagement and the second locking mechanisms 132' are in one-to-one positioning engagement. A schematic view of the one-to-one positioning engagement of each first locking mechanism 131' can be seen in fig. 14 and 15.

Alternatively, at least one of the first locking mechanism 131 'and the second locking mechanism 132' may be configured as a magnetic portion, and the attracting principle of the magnetic portion is the same as that of the first magnetic portion 131 and the second magnetic portion 132, and will not be described herein again.

The locking mechanism 13 is not limited to the magnetic portion, and may be, for example, an adhesive fixing method or a snap fixing method to hold the foldable display device 1 in the folded state. Similarly, the embodiments of the first locking mechanism 131 'and the second locking mechanism 132' are not limited to the magnetic portion, and are not described herein.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A foldable display device having a folded state and an unfolded state, comprising:

the foldable display device is folded at the first folding position to form a first folding state, in the first folding state, the display surface is wrapped in the support main body, edge parts at two ends of the flexible display screen are bent towards a middle part, and the display surfaces of the edge parts are opposite to the display surface of the middle part;

alternatively, the first and second electrodes may be,

the foldable display device is folded at the second folding position to form a second folding state, in the second folding state, the display surface is exposed outside the supporting main body, the edge parts at two ends of the flexible display screen are bent towards the middle part, and the display surface of the edge part is opposite to the display surface of the middle part;

the foldable display device further comprises a locking mechanism, and the locking mechanism is used for fixing the foldable display device in the folded state;

the locking mechanism comprises a first magnetic part and a second magnetic part which are arranged on the supporting body,

in the folded state, the first magnetic part and the second magnetic part are attracted;

the first magnetic part and the second magnetic part are respectively arranged at two ends of the supporting body,

in the folded state, the first magnetic part is butted with the second magnetic part;

the first magnetic part is provided with a first attraction surface, the second magnetic part is provided with a second attraction surface, the first attraction surface and the second attraction surface are inclined surfaces, and the two inclined surfaces are parallel to each other;

the foldable display device also comprises a winding mechanism, one end of the winding mechanism is connected with the support main body, the other end of the winding mechanism is connected with the flexible display screen, the winding mechanism has a winding stroke and an unwinding stroke,

in the conversion process of the folding state and the unfolding state, the winding mechanism generates the winding stroke or the unwinding stroke so as to adjust the lengths of the display surface in the folding state and the unfolding state respectively;

the number of the winding mechanisms is multiple, and each winding mechanism is respectively arranged at two ends of the unfolded flexible display screen.

2. The foldable display device of claim 1, wherein one of the first surface and the second surface is attached to the flexible display screen.

3. The foldable display device of claim 1, wherein the support body comprises a first portion and a second portion, the flexible display screen being sandwiched between the first portion and the second portion,

the first surface is a side surface of the first portion away from the second portion, and the second surface is a side surface of the second portion away from the first portion.

4. The foldable display device of claim 3, wherein the first portion is attached to the display surface and disposed at an edge of the display surface, and the second portion is attached to the non-display surface.

5. The foldable display device of claim 1 or 3, wherein the support body is a frame extending along an edge of the flexible display screen and comprising a first bezel and a second bezel that are parallel to each other,

the first frame and the second frame are provided with a plurality of first folding positions, each first folding position on the first frame is opposite to each first folding position on the second frame one by one, and/or

The first frame and the second frame are provided with a plurality of second folding positions, and the second folding positions located on the first frame are opposite to the second folding positions located on the second frame one by one.

6. The foldable display device of claim 1, wherein the first folded position and the second folded position are disposed opposite to each other in a thickness direction of the flexible display screen.

7. The foldable display device of claim 1, wherein the plurality of first grooves comprise at least one of trapezoidal grooves, triangular grooves, and/or

The plurality of second grooves at least comprise one of trapezoidal grooves and triangular grooves.

8. The foldable display device of claim 1, wherein the winding mechanism comprises an elastic member having one end connected to the support body and the other end connected to the flexible display screen,

in the unfolding process of the flexible display screen, under the action of external force, the elastic piece generates a deformation stroke, and in the folding process of the flexible display screen, the elastic piece generates a reset stroke.

9. The foldable display device of claim 1, wherein the support body has a receiving cavity, and the winding mechanism is disposed in the receiving cavity.

10. The foldable display device of claim 3, further comprising a plurality of first locking mechanisms, each of the plurality of first locking mechanisms being disposed in the first portion, each of the plurality of first locking mechanisms being in one-to-one positioning engagement in the first folded state, or

The folding type folding table is characterized by further comprising a plurality of second locking mechanisms, wherein the second locking mechanisms are arranged on the second portion, and in the second folding state, the second locking mechanisms are in one-to-one positioning fit.

11. The foldable display device of claim 10, wherein at least one of the first and second locking mechanisms comprises a magnetic portion.