CN113539109A

CN113539109A - Flexible display device

Info

Publication number: CN113539109A
Application number: CN202110850664.7A
Authority: CN
Inventors: 张晓音; 何永新
Original assignee: Shanghai Tianma Microelectronics Co Ltd
Current assignee: Shanghai Tianma Microelectronics Co Ltd
Priority date: 2021-07-27
Filing date: 2021-07-27
Publication date: 2021-10-22
Anticipated expiration: 2041-07-27
Also published as: CN113539109B

Abstract

The invention discloses a flexible display device, which relates to the technical field of display and comprises a flexible display panel and a hinge; the hinge includes: the flexible display panel comprises a plurality of supporting seats arranged along a first direction, wherein two adjacent supporting seats are connected with each other; the elastic sheet components comprise elastic sheet main bodies and elastic sheet connecting parts, the elastic sheet components are arranged on at least one side of the supporting seat along a first direction, one ends of the elastic sheet connecting parts are connected with the elastic sheet main bodies, and the other ends of the elastic sheet connecting parts are located in the locating grooves; the elastic sheet connecting part moves along with the bending of the hinge in the positioning groove; when the hinge is in a flattening state, a gap is reserved between the elastic sheet assembly and the supporting seat connected with the elastic sheet assembly. The invention can effectively and timely dissipate the heat of the flexible display panel without influencing the bending of the flexible display panel.

Description

Flexible display device

Technical Field

The invention relates to the technical field of display, in particular to a flexible display device.

Background

With the development of science and technology, flexible display screens have become a new development trend. The existing flexible display screen can be applied to various applications, for example, electronic equipment such as a folding mobile phone, so that the sensory experience of a user is provided, and the use comfort is enhanced.

In the existing flexible display device, in order not to affect the bending of the flexible display screen, a heat dissipation device is not usually provided in the flexible display device. However, as the functions of the flexible display are increased, the power consumption of the corresponding flexible display is increased. At the moment, if the heat in the flexible display screen can not be discharged in time, the flexible display screen is overheated, and further the flexible display screen is damaged. Therefore, how to conduct away the heat that flexible display screen gived off in time and effectively becomes the technical problem that is used for waiting to solve now.

Disclosure of Invention

In view of this, the present invention provides a flexible display device, which can effectively and timely dissipate heat of a flexible display panel without affecting the bending of the flexible display panel.

The present invention provides a flexible display device comprising: the hinge is positioned on one side of the flexible display panel, which is far away from the light emergent surface; the hinge includes: the flexible display panel comprises a plurality of supporting seats arranged along a first direction, wherein two adjacent supporting seats are connected with each other; the elastic sheet components comprise elastic sheet main bodies and elastic sheet connecting parts, the elastic sheet components are arranged on at least one side of the supporting seat along a first direction, one ends of the elastic sheet connecting parts are connected with the elastic sheet main bodies, and the other ends of the elastic sheet connecting parts are located in the locating grooves; the elastic sheet connecting part moves along with the bending of the hinge in the positioning groove; when the hinge is in a flattening state, a gap is reserved between the elastic sheet assembly and the supporting seat connected with the elastic sheet assembly.

Compared with the prior art, the flexible display device provided by the invention at least realizes the following beneficial effects:

the invention provides a flexible display device which comprises a flexible display panel and a hinge. The hinge includes a plurality of supporting seats of arranging along the first direction, is connected between two adjacent supporting seats, and along the first direction, at least one side of supporting seat is equipped with the constant head tank, and the constant head tank is located the one end that the supporting seat deviates from flexible display panel. The hinge still includes a plurality of shell fragment subassemblies, the shell fragment subassembly includes shell fragment main part and shell fragment connecting portion, along first direction, at least one side of supporting seat is equipped with the shell fragment subassembly, the one end and the shell fragment bulk phase of shell fragment connecting portion are connected, the other end of shell fragment connecting portion is located the constant head tank, the one end that does not connect with the shell fragment bulk phase in the shell fragment connecting portion can remove in the constant head tank promptly, thereby the shell fragment connecting portion can remove along with buckling of hinge in the constant head tank, when the hinge is buckled, the orientation is close to direction reciprocal motion each other between the supporting seat, the shell fragment subassembly that is located between the supporting seat receives the extrusion, thereby the shell fragment connecting portion removes in the constant head tank, thereby effectively avoid setting up of shell fragment subassembly to cause the influence to buckling of hinge. When the hinge is in the flattening state, a gap is reserved between the elastic sheet assembly and the supporting seat connected with the elastic sheet assembly, at the moment, the hinge forms a shape with a large heat dissipation area, and because the hinge is located on one side of the flexible display panel, which deviates from the light emitting surface, the hinge can effectively and timely dissipate heat of the flexible display panel.

Of course, it is not necessary for any product in which the present invention is practiced to specifically achieve all of the above-described technical effects simultaneously.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

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

Fig. 1 is an exploded perspective view of a flexible display device provided by the present invention;

fig. 2 is a side view of a flexible display device provided by the present invention;

FIG. 3 is a schematic view of a hinge according to the present invention in an unfolded state;

FIG. 4 is an enlarged schematic view of portion A of the hinge of FIG. 3;

FIG. 5 is a side view of the hinge of the present invention in a bent state;

FIG. 6 is a partial schematic view of the hinge of the present invention in a bent state;

FIG. 7 is a partial cross-sectional view of the hinge provided by the present invention in a flattened condition;

FIG. 8 is a partial cross-sectional view of the hinge of the present invention in a flexed condition;

FIG. 9 is an exploded perspective view of the hinge provided by the present invention;

FIG. 10 is an enlarged schematic view of portion B of the hinge of FIG. 9;

fig. 11 is a schematic plan view of another flexible display device according to the present invention.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Fig. 1 is an exploded perspective view of a flexible display device provided by the present invention, fig. 2 is a side view of the flexible display device provided by the present invention, and referring to fig. 1 and fig. 2, the present embodiment provides a flexible display device including a flexible display panel 100 and a hinge 200, wherein the hinge 200 is located on a side of the flexible display panel 100 facing away from a light exit surface, and the hinge 200 can be used to support the flexible display panel 100 without affecting the bending of the flexible display panel 100.

Fig. 3 is a schematic structural diagram of a hinge provided by the present invention in an unfolded state, fig. 4 is an enlarged schematic view of a portion a of the hinge illustrated in fig. 3, fig. 5 is a side view of the hinge provided by the present invention in a bent state, fig. 6 is a schematic partial structural diagram of the hinge provided by the present invention in a bent state, referring to fig. 3 to fig. 6, the hinge 200 includes a plurality of supporting seats 210 arranged along a first direction X, two adjacent supporting seats 210 are connected to each other, at least one side of the supporting seats 210 is provided with a positioning groove 211 along the first direction X, and the positioning groove 211 is located at an end of the supporting seat 210 away from the flexible display panel 100.

Hinge 200 still includes a plurality of shell fragment subassemblies 220, shell fragment subassembly 220 includes shell fragment main part 221 and shell fragment connecting portion 222, along first direction X, at least one side of supporting seat 210 is equipped with shell fragment subassembly 220, the one end of shell fragment connecting portion 222 is connected with shell fragment main part 221, the other end of shell fragment connecting portion 222 is located constant head tank 211, the one end that does not be connected with shell fragment main part 221 in shell fragment connecting portion 222 can move in constant head tank 211 promptly, thereby shell fragment connecting portion 222 can remove along with the buckling of hinge 200 in constant head tank 211, when hinge 200 buckles, the orientation is close to each other direction inter motion between the supporting seat 210, shell fragment subassembly 220 that is located between the supporting seat 210 receives the extrusion, thereby shell fragment connecting portion 222 removes in constant head tank 211, thereby effectively avoid setting up of shell fragment subassembly 220 to cause the influence to the buckling of hinge 200.

When the hinge 200 is in the flat state, a gap Q is formed between the elastic sheet assembly 220 and the supporting seat 210 connected with the elastic sheet assembly, at this time, the hinge 200 is in a form with a large heat dissipation area, and because the hinge 200 is located on one side of the flexible display panel 100 departing from the light exit surface, at this time, the hinge 200 can effectively and timely dissipate heat of the flexible display panel 100.

Further, when the hinge 200 is in the flat state, the gap Q between the elastic sheet assembly 220 and the supporting seat 210 connected thereto is the largest, because the hinge 200 is located on the side of the flexible display panel 100 away from the light emitting surface, when the hinge 200 is in the flat state, the flexible display panel 100 is also in the flat state, and the flexible display panel 100 generally displays in the flat state, therefore, when the flexible display panel 100 is in the flat state, the power consumption is high, the generated heat is the largest, and at this time, the hinge 200 can further effectively and timely dissipate heat of the flexible display panel 100.

In some optional embodiments, the elastic sheet assembly 220 is made of an elastic metal material, so that when the elastic sheet assembly 220 is squeezed, the elastic sheet connecting portion 222 can move in the positioning groove 211, thereby effectively preventing the elastic sheet assembly 220 from being arranged to affect the bending of the hinge 200. Moreover, the metal material is favorable for heat transmission, so that the elastic sheet assembly 220 is further favorable for heat dissipation of the flexible display panel 100.

Referring to fig. 1-6, in some alternative embodiments, the support base 210 extends in a second direction Y, wherein the first direction X intersects the second direction Y. Optionally, the first direction X and the second direction Y are perpendicular.

When the elastic sheet assembly 220 is squeezed, the elastic sheet connecting portion 222 can move in the positioning groove 211, and the length of the image formed by the positioning groove 211 on the section of the plane perpendicular to the second direction Y is greater than or equal to the length of the image formed by the elastic sheet connecting portion 222 on the section of the plane perpendicular to the second direction Y, so that the elastic sheet connecting portion 222 can be integrally compressed into the positioning groove 211, the bending angle of the hinge 200 can be increased, and the bending angle of the flexible display device can be increased.

Referring to fig. 1-6, in some alternative embodiments, one end of the elastic piece main body 221 is connected to the elastic piece connecting portion 222, and one end of the elastic piece main body 221 away from the elastic piece connecting portion 222 is fixed to one end of the supporting base 210 away from the positioning groove 211, so that when the elastic piece assembly 220 is squeezed, the elastic piece connecting portion 222 can move in the positioning groove 211 along with the bending of the hinge 200, and the elastic piece assembly 220 is prevented from being separated from the hinge 200 to damage the flexible display panel 100. And when the hinge 200 is in the flattened state, a gap Q is formed between the spring assembly 220 and the support base 210 connected thereto.

In some alternative embodiments, when the hinge 200 is in the flat state, an image formed by a section of the elastic sheet main body 221 in a plane perpendicular to the second direction Y extends in a direction perpendicular to the flexible display panel 100, and at this time, the area of the gap Q between the elastic sheet assembly 220 and the supporting seat 210 connected thereto is the largest, which is beneficial to dissipating heat of the flexible display panel 100. And the two spring main bodies 221 connected between the support seats 210 can be abutted, so that the stability of the hinge 200 in the flattening state is improved.

Referring to fig. 1 to 6, in some alternative embodiments, the support base 210 includes two first sidewalls 212, the two first sidewalls 212 of the support base 210 are located on two sides of the support base 210 along a first direction X, the two first sidewalls 212 of the support base 210 extend in a direction perpendicular to the flexible display panel 100 and directed toward the flexible display panel 100 by the hinge 200, the two first sidewalls 212 of the support base 210 extend in a direction away from each other, and the farther away from the flexible display panel 100 along the direction perpendicular to the flexible display panel 100, the smaller the distance between the two first sidewalls 212 of the support base 210 in the first direction X is, so that when the hinge 200 is in the unfolded state, the larger the distance between two adjacent support bases 210 is, so that the elastic piece assembly 220 can be disposed on at least one side of the support base 210 along the first direction X, and the two adjacent support bases 210 can perform a relative movement, so as to achieve bending of the hinge 200.

Fig. 7 is a partial cross-sectional view of the hinge of the present invention in a flattened state, and referring to fig. 1-7, in some alternative embodiments, the detent 211 includes a first slot 2111 and a second slot 2112 connected, the first slot 2111 being located between the first sidewall 212 and the second slot 2112 adjacent thereto, and the first slot 2111 being located on the side of the detent 211 adjacent to the first sidewall 212 adjacent thereto. The first groove 2111 has a linear shape in a cross section of a plane perpendicular to the second direction Y, and the second groove 2112 has a circular arc shape in a cross section of a plane perpendicular to the second direction Y. Optionally, when the hinge 200 is in the unfolded state, the elastic piece connecting portion 222 is partially located in the first slot 2111, when the hinge 200 is bent, the elastic piece connecting portion 222 is partially moved into the second slot 2112, and an image formed by a cross section of the second slot 2112 on a plane perpendicular to the second direction Y is a circular arc, so that the elastic piece connecting portion 222 is favorably rebounded to the state of the elastic piece connecting portion when the hinge 200 is in the unfolded state, and the situation that the elastic piece connecting portion 222 cannot rebound to the state of the elastic piece connecting portion when the hinge 200 is in the unfolded state is avoided, so that a gap Q between the elastic piece assembly 220 and the support base 210 connected thereto is reduced, and the heat dissipation effect is affected.

Referring to fig. 1-7, in some alternative embodiments, the supporting base 210 includes a first bottom surface 213, and the first bottom surface 213 is located on a side of the supporting base 210 away from the positioning groove 211 in a direction perpendicular to the flexible display panel 100.

In the image formed by the section of the support seat 210 in the plane perpendicular to the second direction Y, the image formed by the section of the second slot 2112 in the plane perpendicular to the second direction Y is an arc, and the center of the second slot 2112 is the intersection point P of the first bottom surface 213 and the first side wall 212 close to the positioning groove 211, so that when the hinge 200 is bent, the spring connecting portion 222 partially moves in the second slot 2112.

It should be noted that, in other embodiments of the present invention, an image formed by a cross section of the positioning groove on a plane perpendicular to the second direction may be an arc, and a center of the arc is an intersection point of the first bottom surface and the first sidewall close to the positioning groove, which is not described herein again.

Referring to fig. 1 to 7, in some alternative embodiments, in the first direction X, an included angle between the first groove 2111 and a plane of the first sidewall 212 on the same side of the supporting seat 210 is α 1, when the hinge 200 is in the flattened state, an included angle between the spring main body 221 and a spring connecting portion 222 connected to the spring main body is α 2, and an included angle between the spring main body 221 and a plane of the first sidewall 212 adjacent to the spring main body is α 3, because a cross-section of the first groove 2111 in a plane perpendicular to the second direction Y is linear, α 1 is α 2+ α 3, that is, when the hinge 200 is in the flattened state, the spring connecting portion 222 may be partially located in the first groove 2111, and at this time, there is no mutual pressing force between the spring assembly 220 and the supporting seat 210, so that the spring assembly 220 is prevented from deforming or loosening after the hinge 200 is in the flattened state for a long time, effectively increasing the service life of the spring assembly 220.

Fig. 8 is a partial cross-sectional view of the hinge of the present invention in a bent state, with reference to fig. 8, in some alternative embodiments, when the dome body 221 is engaged with the first sidewall 212 adjacent thereto, the included angle between the spring main body 221 and the spring connecting portion 222 connected thereto is α 2, that is, when the hinge is in the maximum bending state, the elastic sheet main body 221 is attached to the first side wall 212 close to the elastic sheet main body, at this time, the included angle between the elastic sheet main body 221 and the elastic sheet connecting part 222 connected with the elastic sheet main body is alpha 2, which is the same as the included angle between the main body 221 of the striking flake and the connecting portion 222 of the striking flake connected with the main body when the hinge is in the unfolded state, that is, the elastic piece main body 221 and the elastic piece connecting portion 222 of the elastic piece assembly 220 are not pressed, therefore, the hinge 200 is prevented from being deformed or loosened to a certain extent after being in the maximum bending state for a long time, and the service life of the elastic sheet assembly 220 is effectively prolonged.

With reference to fig. 8, in some optional embodiments, the supporting base 210 includes a first sub-portion 214 and a second sub-portion 215 connected to each other, the positioning groove 211 is located in the first sub-portion 214, an elastic modulus of the first sub-portion 214 is smaller than an elastic modulus of the second sub-portion 215, that is, the elastic modulus of the first sub-portion 214 is smaller, when the hinge is in the bending state, and the elastic piece assembly 220 is pressed, the positioning groove 211 has a certain deformation space, so that the elastic piece main body 221 and the elastic piece connecting portion 222 in the elastic piece assembly 220 are not pressed, thereby preventing the elastic piece assembly 220 from deforming or loosening after the hinge 200 is in the maximum bending state for a long time, and effectively increasing the service life of the elastic piece assembly 220. Optionally, the material of the first sub-portion 214 is rubber. It is understood that in other embodiments of the present invention, the material of the first sub-portion 214 may also be other material with a smaller elastic modulus, and the present invention is not described in detail herein.

In some alternative embodiments, in the direction perpendicular to the flexible display panel, the second sub-portion 215 of the supporting base 210 may be disposed at two ends of the first sub-portion 214, and the elastic modulus of the second sub-portion 215 is larger, which effectively improves the strength of the supporting base 210.

Referring to fig. 2 and 7, in some alternative embodiments, in a direction perpendicular to the flexible display panel 100, the height of the elastic sheet main body 221 is less than or equal to the height of the supporting base 210, so as to prevent the thickness of the hinge 200 from being affected by an excessive height of the elastic sheet main body 221, and effectively reduce the thickness of the flexible display device.

Referring to fig. 2 and 7, in some alternative embodiments, α 1 is less than 90 °, that is, in the first direction X, an included angle between planes of the first groove 2111 and the first sidewall 212 on the same side of the supporting seat 210 is less than 90 °, which is beneficial to increasing the length of the positioning groove 211 arranged inside the supporting seat 210 and increasing the arrangement height of the elastic sheet main body 221, thereby being beneficial to increasing the size of the gap Q between the elastic sheet assembly 220 and the supporting seat 210 connected thereto, and being beneficial to improving the heat dissipation effect.

Referring to fig. 2 and 7, in some alternative embodiments, the hinge 200 further includes a plurality of leaf spring bases 300, and the leaf spring bases 300 correspond to the supporting bases 210 one to one. The supporting base 210 includes a first bottom surface 213, and the first bottom surface 213 is located on a side of the supporting base 210 away from the positioning groove 211 in a direction perpendicular to the flexible display panel 100. The spring plate base plate 300 is fixed to the first bottom surface 213 corresponding thereto, and one end of the spring plate main body 221 away from the spring plate connecting portion 222 is connected to one end of the spring plate base plate 300 corresponding thereto. Thus, the end of the spring main body 221 away from the spring connecting portion 222 is fixed to the support base 210 by fixing the spring bottom plate 300 to the first bottom surface 213 corresponding thereto. And the spring plate bottom plate 300 is fixed with the corresponding first bottom surface 213, and the connection area between the spring plate bottom plate 300 and the corresponding first bottom surface 213 is large, which is beneficial to improving the connection stability between the spring plate main body 221 and the support seat 210. Alternatively, the elastic sheet bottom plate 300 and the first bottom surface 213 corresponding thereto may be connected and fixed by adhesion.

The flexible display panel 100 is located on one side of the hinge 200 close to the first bottom surface 213, the elastic sheet base plate 300 is located between the hinge 200 and the flexible display panel 100, heat of the flexible display panel 100 can be rapidly transmitted to the elastic sheet assembly 220 connected with the flexible display panel through the elastic sheet base plate 300, and then the heat is effectively dissipated through the elastic sheet assembly 220, so that the heat dissipation performance of the flexible device is further improved.

Referring to fig. 1-6, in some alternative embodiments, the dome main body 221 and the dome base plate 300 corresponding thereto are connected by a dome corner 400, and an angle between the dome base plate 300 and the dome corner 400 is less than 180 °, and an angle between the dome main body 221 and the dome corner 400 is greater than 90 °. When the hinge 200 is in a bent state, an avoiding space is effectively reserved between the joint of the spring plate main body 221 between two adjacent supporting seats 210 and the spring plate base plate 300 corresponding to the joint and the joint of the adjacent spring plate main body 221 and the spring plate base plate 300 corresponding to the joint, so that the two are prevented from being scratched mutually. And when the hinge 200 is in the unfolded state, the flexible display screen 100 is prevented from being damaged by the joint of the elastic sheet main body 221 and the corresponding elastic sheet bottom plate 300 when the connected supporting seat 210 has a step difference.

Referring to fig. 1-6, in some alternative embodiments, the spring base plate 300, the spring corner 400, and the spring assembly 220 are integrally formed, i.e., the spring base plate 300, the spring corner 400, and the spring assembly 220 may be formed in the same process using the same material.

It should be noted that, in fig. 1 to 8, the elastic piece assemblies 220 are disposed on both sides of the supporting seat 210 along the first direction X, and at this time, the elastic piece bottom plate 300, the elastic piece corner 400 and the elastic piece assemblies 220 are configured to surround the supporting seat 210 corresponding thereto. In other embodiments of the present invention, the supporting seat 210 may be disposed on one side of the elastic sheet assembly 220 along the first direction X, which is not described herein again.

Fig. 9 is an exploded perspective view of the hinge provided in the present invention, and fig. 10 is an enlarged view of a portion B of the hinge shown in fig. 9. referring to fig. 9 and 10, in some alternative embodiments, the hinge further includes a plurality of connecting members 230, and two adjacent supporting seats 210 are connected by the connecting members 230.

The connecting member 230 is hinged to the supporting seat 210 through a pin 240 and a pin hole 250, wherein the axial direction of the pin 240 is a third direction F, and the first direction X intersects with the third direction F. Alternatively, the third direction F and the second direction Y may be the same direction. The pin shaft 240 is rotatable in the pin hole 250 so that the two support bases 210 connected by the connection member 230 can move relative to each other, thereby bending the hinge.

It should be noted that fig. 9 and 10 exemplarily show that the pin 240 is disposed on the connecting member 230 and the pin hole 250 is disposed on the supporting seat 210, and in other embodiments of the present invention, the pin 240 may be disposed on the supporting seat 210 and the pin hole 250 is disposed on the connecting member 230, which is not limited in the present invention.

Fig. 11 is a schematic plan view of another flexible display device provided in the present invention, and referring to fig. 11, in some alternative embodiments, the supporting base 210 includes a plurality of supporting blocks 216 arranged along a second direction, and the supporting blocks 216 are connected by a connecting portion 230, wherein a first direction X intersects a second direction Y, so as to achieve bending of the flexible display device in the first direction X and the second direction Y, thereby improving flexibility of bending of the flexible display device. Along the second direction Y, at least one side of the supporting block 216 is provided with a positioning groove (not shown in the figure), and along the second direction Y, at least one side of the supporting block 216 is provided with a spring plate assembly 220, so that the hinge 200 can effectively and timely dissipate heat of the flexible display panel 100.

According to the embodiment, the flexible display device provided by the invention at least has the following beneficial effects:

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A flexible display device, comprising: the hinge is positioned on one side of the flexible display panel, which is far away from the light emitting surface;

the hinge includes:

the flexible display panel comprises a plurality of supporting seats arranged along a first direction, wherein two adjacent supporting seats are connected with each other;

the elastic sheet components comprise elastic sheet main bodies and elastic sheet connecting parts, the elastic sheet components are arranged on at least one side of the supporting seat along the first direction, one ends of the elastic sheet connecting parts are connected with the elastic sheet main bodies, and the other ends of the elastic sheet connecting parts are located in the positioning grooves;

the elastic sheet connecting part moves along with the bending of the hinge in the positioning groove;

when the hinge is in a flattening state, a gap is reserved between the elastic sheet assembly and the supporting seat connected with the elastic sheet assembly.

2. Flexible display device according to claim 2,

the extending direction of the supporting seat is a second direction, wherein the first direction is intersected with the second direction;

the length of an image formed by the positioning groove on the section of the plane perpendicular to the second direction is greater than or equal to the length of an image formed by the elastic sheet connecting part on the section of the plane perpendicular to the second direction.

3. Flexible display device according to claim 2,

one end of the elastic sheet main body, which is far away from the elastic sheet connecting part, is fixed with one end of the supporting seat, which is far away from the positioning groove.

4. Flexible display device according to claim 3,

the supporting seat comprises two first side walls, and the two first side walls are positioned on two sides of the supporting seat along the first direction;

the two first side walls of the support base extend towards the direction departing from each other along the direction which is perpendicular to the flexible display panel and is pointed to the flexible display panel by the hinge.

5. Flexible display device according to claim 4,

the positioning groove comprises a first groove body and a second groove body which are connected, and the first groove body is positioned between the first side wall and the second groove body which are close to the first groove body;

the image formed by the first groove body on the section of the plane perpendicular to the second direction is linear, and the image formed by the second groove body on the section of the plane perpendicular to the second direction is arc-shaped.

6. Flexible display device according to claim 5,

in the first direction, an included angle between planes of the first groove body and the first side wall, which are positioned on the same side of the supporting seat, is alpha 1;

when the hinge is in a flattening state, an included angle between the elastic sheet main body and the elastic sheet connecting part connected with the elastic sheet main body is alpha 2, and an included angle between the elastic sheet main body and a plane where the first side wall close to the elastic sheet main body is located is alpha 3;

wherein α 1 ═ α 2+ α 3.

7. Flexible display device according to claim 6,

when the elastic sheet main body is attached to the first side wall close to the elastic sheet main body, an included angle between the elastic sheet main body and the elastic sheet connecting part connected with the elastic sheet main body is alpha 2.

8. Flexible display device according to claim 7,

the supporting seat comprises a first sub-portion and a second sub-portion which are connected, the positioning groove is located in the first sub-portion, and the elastic modulus of the first sub-portion is smaller than that of the second sub-portion.

9. Flexible display device according to claim 5,

the supporting seat comprises a first bottom surface, and the first bottom surface is positioned on one side of the supporting seat far away from the positioning groove in the direction perpendicular to the flexible display panel;

in an image formed by the section of the support seat on a plane perpendicular to the second direction, the circle center of the second groove body is the intersection point of the first bottom surface and the first side wall close to the positioning groove.

10. Flexible display device according to claim 6,

in the direction perpendicular to the flexible display panel, the height of the elastic sheet main body is smaller than or equal to that of the supporting seat.

11. The flexible display device of claim 10,

α1＜90°。

12. flexible display device according to claim 1,

the hinge further comprises:

the adjacent two supporting seats are connected through the connecting pieces;

the connecting piece with the supporting seat is hinged through a pin shaft and a pin hole, wherein the axial direction of the pin shaft is a third direction, and the first direction is intersected with the third direction.

13. Flexible display device according to claim 3,

the hinge also comprises a plurality of elastic sheet bottom plates, and the elastic sheet bottom plates correspond to the supporting seats one by one;

the elastic sheet bottom plate is fixed with the first bottom surface corresponding to the elastic sheet bottom plate;

one end of the elastic sheet main body, which is far away from the elastic sheet connecting part, is connected with one end of the elastic sheet bottom plate, which corresponds to the elastic sheet main body.

14. The flexible display device of claim 13,

the elastic sheet main body is connected with the elastic sheet bottom plate corresponding to the elastic sheet main body through an elastic sheet corner part, an included angle between the elastic sheet bottom plate and the elastic sheet corner part is smaller than 180 degrees, and an included angle between the elastic sheet main body and the elastic sheet corner part is larger than 90 degrees.

15. The flexible display device of claim 14,

the elastic piece bottom plate, the elastic piece corner part and the elastic piece assembly are of an integrally formed structure.

16. Flexible display device according to claim 1,

the elastic sheet assembly is made of elastic metal materials.

17. Flexible display device according to claim 1,

the supporting seat comprises a plurality of supporting blocks arranged along a second direction, the supporting blocks are connected through connecting parts, and the first direction is intersected with the second direction;

and at least one side of the supporting block is provided with a positioning groove along the second direction, and the elastic piece component is arranged on at least one side of the supporting block along the second direction.