CN113362713B

CN113362713B - Flexible display device

Info

Publication number: CN113362713B
Application number: CN202110666284.8A
Authority: CN
Inventors: 郭志林; 张振宇; 冯彦贵; 张民; 达仕勋; 张福爽; 蔡勤山
Original assignee: Hefei Visionox Technology Co Ltd
Current assignee: Hefei Visionox Technology Co Ltd
Priority date: 2021-06-16
Filing date: 2021-06-16
Publication date: 2023-06-16
Anticipated expiration: 2041-06-16
Also published as: CN113362713A

Abstract

The invention provides a flexible display device, which comprises a flexible display panel and a curling component. The flexible display panel has opposite display and back surfaces. The crimping assembly comprises a wall part and an accommodating cavity formed by surrounding the wall part, wherein at least part of one side surface of the wall part, which is opposite to the accommodating cavity, is a binding surface, and the back surface of the flexible display panel is bound to the binding surface. The curling component is provided with an extending state and a resetting state, the flexible display panel is driven to curl in the resetting state of the curling component, and the curling component is converted into the extending state from the resetting state according to the increase of the internal pressure of the accommodating cavity so as to drive the flexible display panel to be unfolded. The flexible display device provided by the application is provided with the curling component which is in an extending state and a resetting state, the aim that the flexible display panel is repeatedly switched between the flattening state and the curling state can be achieved, and the flexible display device is simple in integral structure and has higher operation reliability.

Description

Flexible display device

Technical Field

The invention belongs to the technical field of photoelectric display, and particularly relates to a flexible display device.

Background

The flexible display device, such as electronic products like a curled mobile phone and a curled tablet computer, can realize the function of switching between a curled state and a flattened state. Flexible display devices have many advantages such as small size, low power consumption, and easy portability, and thus, they are becoming popular. Flexible display devices typically require the provision of a corresponding crimping and flattening mechanism for switching back and forth between the crimped and flattened states. However, in general, a flexible display device needs to have a relatively complex structure to achieve the purpose of switching between a curled state and a flattened state.

Disclosure of Invention

The embodiment of the invention provides a flexible display device, which aims to solve the problem that a curling and flattening mechanism of the flexible display device in the prior art is complex in structure.

An embodiment of the present invention provides a flexible display device including: a flexible display panel having a display surface and a back surface opposite to each other; the flexible display panel comprises a flexible display panel, and is characterized by comprising a curling component and an accommodating cavity formed by surrounding the wall, wherein at least part of one side surface of the wall, which is opposite to the accommodating cavity, is a binding surface, the back surface of the flexible display panel is bound to the binding surface, the curling component is provided with an extending state and a resetting state, the curling component is driven to curl in the resetting state, and the curling component is converted into the extending state from the resetting state according to the increase of the pressure in the accommodating cavity so as to drive the flexible display panel to be unfolded.

In some embodiments, the wall portion includes a first side wall portion and a second side wall portion connected to each other, the first side wall portion is a rigid curled portion, the second side portion is a flexible film structure, the first side wall portion and the second side wall portion are connected to each other to form the accommodating cavity, and the binding surface is located on a surface of the first side wall portion facing away from the accommodating cavity; alternatively, the crimping assembly includes: a flexible housing, at least a portion of the wall portion being formed in the flexible housing, the flexible housing forming the receiving cavity; the crimping piece is connected with the flexible shell, the crimping piece has the extension state with reset state, the crimping piece drives under the reset state the flexible shell curls, under the reset state hold the chamber and be in the evacuation state, the flexible shell hold the chamber and can hold flowing medium in order to change hold chamber inside pressure, the flexible shell is along with hold chamber inside pressure's increase and extend gradually, so that the crimping piece is by reset state conversion the extension state is in order to drive the flexible shell is expanded.

In some embodiments, the crimp member is a rigid crimp sheet, the binding surface is formed on a side of the rigid crimp sheet facing away from the flexible housing, or the binding surface is formed on a side of the flexible housing facing away from the rigid crimp sheet, preferably the rigid crimp sheet is a metal sheet having a predetermined stiffness.

In some embodiments, the crimping member is a rigid crimping strip formed on one of the walls of the flexible housing facing away from the receiving cavity, the rigid crimping strip being connected to a side of the flexible housing adjacent to the binding surface, preferably the rigid crimping strip is a metal strip having a predetermined stiffness.

In some embodiments, the flexible housing has a first wall portion opposite the binding surface, the first wall portion being planar, convex curved, concave curved, or undulating curved.

In some embodiments, the flexible display device further comprises a supply device connected to the receiving chamber, the supply device providing a flowable medium to the receiving chamber to vary a pressure inside the receiving chamber.

In some embodiments, the feeding means comprises: the hydraulic cylinder comprises a cylinder body and a piston rod, wherein a storage cavity for accommodating flowing media is formed by surrounding the cylinder body and the piston rod, and the storage cavity is communicated with the accommodating cavity; and the driving assembly is connected with the piston rod and can enable the piston rod to move relative to the cylinder body.

In some embodiments, the drive assembly comprises: a motor having an output shaft; the transmission piece is connected with the motor and the piston rod, the transmission piece is provided with an input end and an output end, the input end is connected with the output shaft, and the output end is connected with the piston rod.

In some embodiments, the supply device further includes a pipe, a wall portion of the cylinder opposite to the piston rod is formed with a communication port, a wall portion of the crimp assembly corresponding to the receiving chamber is formed with a communication port, and the pipe connects the communication port and the communication port so that the flowing medium can flow back and forth between the receiving chamber and the storage chamber.

In some embodiments, the feeding means comprises: a storage chamber for storing a flowing medium; and a pump system communicating the storage chamber and the accommodating chamber, the pump system being capable of flowing a flowing medium back and forth between the storage chamber and the accommodating chamber.

The flexible display device that this embodiment provided, the crimping subassembly has and holds the chamber and bind the face, and display panel binds the face to set up crimping subassembly and have extension state and reset state, and reset under the state, crimping subassembly drives flexible display panel and curls, realizes flexible display panel's curling, exerts pressure to holding the chamber, and crimping subassembly is by reset state conversion to extension state, realizes flexible display panel and expands. The flexible display device provided by the application can realize the curling and flattening of the flexible display panel through a simple structure, and has higher operation reliability.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.

FIG. 1 is a schematic cross-sectional view of a crimping assembly used in a flexible display device according to one embodiment of the present application;

FIG. 2 is a schematic structural diagram of a flexible display device according to an embodiment of the present disclosure;

FIG. 3 is a cross-sectional view taken along the direction C-C in FIG. 2;

FIG. 4 is a cross-sectional view of the crimping assembly of the flexible display device of FIG. 2 taken perpendicular to the length thereof;

FIG. 5 is a schematic cross-sectional view of a crimping assembly employed in a flexible display device provided in accordance with an embodiment of the present application;

FIG. 6 is a schematic cross-sectional view of a flexible display device according to another embodiment of the present application;

fig. 7 is a schematic structural diagram of a flexible display device according to an embodiment of the present application in a reset state of a crimping member;

fig. 8a to 8f are schematic structural diagrams of a flexible casing used in the flexible display device according to the different embodiments of the present application;

FIG. 9 is a schematic diagram of a feeding mechanism used in a flexible display device according to an embodiment of the present disclosure;

fig. 10 is a schematic structural diagram of a flexible display device according to another embodiment of the present application.

In the accompanying drawings:

10. a flexible display panel;

20. a crimping assembly; 21. a wall portion; 211. a first sidewall portion; 212. a second side wall portion; 20a, binding surfaces; 20b, a receiving cavity; 22. a flexible housing; 23. a crimping member; 23', rigid crimp tabs; 23", a rigid curled strip;

30. a supply device; 31. a hydraulic cylinder; 31a, a storage chamber; 311. a cylinder; 312. a piston rod; 32. a drive assembly; 321. a motor; 3211. an output shaft; 322. a transmission member; 3221. a first bevel gear set; 3222. a transmission shaft; 3223. a second bevel gear set; 33. a pipe; 31', a storage compartment; 32', a pump system.

Detailed Description

Features and exemplary embodiments of various aspects of the invention are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by showing examples of the invention.

The directional terms in the description of the present application are merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the present application.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The embodiments will be described in detail below with reference to the accompanying drawings.

The embodiment of the application provides a flexible display device, which can be a mobile phone, a tablet computer or a display and the like. As shown in fig. 1 to 3, the flexible display device includes a flexible display panel 10 and a crimping assembly 20, the flexible display panel 10 having opposite display surfaces for displaying images and a back surface, the flexible display panel 10 being connected to the crimping assembly 20 through the back surface.

The crimping assembly 20 includes a wall portion 21 and a receiving cavity 20b surrounded by the wall portion 21, wherein a side surface of the wall portion 21 facing away from the receiving cavity 20b is at least partially a binding surface 20a, and a back surface of the flexible display panel 10 is bound to the binding surface 20a of the crimping assembly 20. The curling assembly 2 has an extended state and a reset state, and the curling assembly 20 drives the flexible display panel 10 to curl in the reset state, so as to further realize the curling of the flexible display device. The curling assembly 20 is converted from a reset state to an extended state according to an increase of the internal pressure of the accommodating chamber 20b to drive the flexible display panel 10 to be flattened.

According to the flexible display device provided by the embodiment of the application, the flexible display panel 10 is driven to curl under the reset state of the curling component 20, and the curling component 20 is gradually converted into the stretching state from the reset state by applying pressure into the accommodating cavity 20b of the curling component 20, so that the flexible display panel 10 is driven to be gradually flattened. That is, the flexible display panel 10 is flattened or curled by changing the pressure in the accommodating cavity 20b of the curling assembly 20, and the flexible display panel 10 can be switched freely between curling and flattening by adopting a simpler structure.

Specifically, the structure of the crimping assembly 20 is not limited, and the accommodating chamber 20b is a storage space formed inside the crimping assembly 20 and capable of storing the flowing medium and allowing the flowing medium to freely enter and exit, and the specific shape of the accommodating chamber 20b and the forming manner thereof in the crimping assembly 20 are not limited, as long as the accommodating chamber can accommodate the flowing medium and allow the flowing medium to enter and exit. The pressure inside the accommodation chamber 20b is increased by supplying the flowing medium thereto, and the pressure inside the accommodation chamber 20b is decreased by extracting the flowing medium therefrom. When the inside of the accommodating cavity 20b is vacuumized, the curling assembly 20 naturally resets to curl the flexible display panel 10. And pressure is applied to the inside of the accommodating cavity 20b, the curling assembly 20 is gradually converted from a reset state to an extension state, namely, the flexible display panel 10 is gradually flattened, and the pressure is continuously applied to the inside of the accommodating cavity 20b until the flexible display panel 10 is completely flattened, at this time, the pressure in the inside of the accommodating cavity 20b is maintained, so that the flexible display panel 10 can be kept in the completely flattened state.

It will be appreciated that there are a variety of ways in which pressure may be applied to the interior of the receiving chamber 20b, and that the pressure within the receiving chamber 20b may be increased by the introduction of a liquid, gas or other flow medium into the receiving chamber 20b. And, the expansion degree of the flexible display panel 10 can be adjusted by adjusting the pressure, for example, different pressure values in the accommodating cavity 20b are set to correspond to different curling curvatures of the flexible display panel 10, when the flexible display panel 10 is required to be set to be in a specific curling curvature, only the accommodating cavity 20b is required to be set to have corresponding pressure, so that the operation of adjusting the curvature of the flexible display panel 10 is convenient and quick.

Alternatively, when the interior of the accommodating chamber 20b is evacuated, the curling assembly 20 may be automatically returned to a reset state, for example, the curling assembly 20 is made of an elastic member, and the curling assembly 20 is in a wound shape in the reset state, that is, at least part of the curling assembly 20 is disposed overlapping each other in the reset state. Additionally, crimping assembly 20 may be returned to the reset condition by external force, without limitation.

In some alternative embodiments, as shown in fig. 1, the wall portion 21 includes a first side wall portion 211 and a second side wall portion 212 connected to each other, the first side wall portion 211 is a rigid curled portion, the second side wall portion 212 is a flexible film structure, the first side wall portion 211 and the second side wall portion 212 are connected to each other to form the accommodating cavity 20b, and the binding surface 20a is located on a surface of the side of the first side wall portion 211 facing away from the accommodating cavity 20b. Specifically, the flexible display panel 10 is bonded to the bonding surface 20a, and is curled with the curling of the rigid curled portion and flattened with the flattening of the rigid curled portion. By so doing, the purpose of switching the flexible display panel 10 in both the curled and flattened states can still be achieved.

In some embodiments, as shown in fig. 4-6, crimping assembly 20 includes a flexible housing 22 and a crimp 23. At least part of the wall portion 21 is formed in the flexible housing, the flexible housing 22 forms the accommodation chamber 20b, and the crimping piece 23 is connected to the flexible housing 22. The curling member 23 has an extended state and a reset state, and the flexible casing 22 is curled by the reset state of the curling member 23, so that the flexible display panel 10 is curled.

In the reset state, the accommodating cavity 20b is vacuumized, the accommodating cavity 20b of the flexible shell 22 can accommodate flowing media to change the pressure inside the accommodating cavity 20b, and the flexible shell 22 gradually stretches along with the increase of the pressure inside the accommodating cavity 20b, so that the crimping assembly 20 is converted into the stretching state from the reset state to drive the flexible shell 22 to be stretched.

Specifically, as shown in fig. 7, the curling member 23 curls in a winding shape or an arc-shaped piece in a reset state, bringing the flexible casing 22 to curl together. The pressure inside the accommodating cavity 20b is gradually increased, the force against the crimping member 23 is generated inside the accommodating cavity 20b, the crimping member 23 is forced to gradually switch from the reset state to the extension state until the flexible display panel 10 is completely flattened, and the pressure inside the accommodating cavity 20b is maintained, so that the flexible display panel 10 is kept completely flattened.

By providing the crimping assembly 20 including the flexible housing 22 and the crimping piece 23, the switching of the crimping assembly 20 between the reset state and the extended state can be better achieved, the operability is strong, and the operational process reliability of the flexible display panel 10 for achieving crimping and flattening is higher.

It will be appreciated that the particular configuration of the crimping member 23 is not limited and may be sheet-like, strip-like or plate-like in the extended state, as long as the reset state and the extended state can be achieved.

In some embodiments, as shown in fig. 5, the crimp 23 is a rigid crimp tab 23', and the binding surface 20a is formed on a side of the rigid crimp tab 23' facing away from the flexible housing 22. Specifically, the rigid rolling sheet 23 'is curled in a natural state, and one side of the rigid rolling sheet 23' is connected to the flexible casing 22, so that the flexible casing 22 is curled together. It will be appreciated that the rigid crimp 23 'itself has a degree of elasticity that will cause the rigid crimp 23' to flatten gradually as the pressure within the flexible housing 22 increases. Providing the crimp 23 as a rigid crimp tab 23' makes the structure of the crimp assembly 20 simpler and has good operational reliability.

It will be appreciated that the rigid crimp 23 'may be made of metal, plastic, etc., and preferably, the rigid crimp 23' is made of a metal sheet with a predetermined stiffness, so that the crimp assembly 20 can be switched between the reset state and the extended state multiple times, and the operational reliability is higher.

In some alternative embodiments, as shown in fig. 4, the binding surface 20a is formed on the side of the flexible housing 22 facing away from the rigid crimp sheet 23'. The embodiment of the present embodiment having the binding surface 20a formed on the side of the rigid rolling sheet 23' facing away from the flexible casing 22 has the same technical effects, and will not be described herein.

In some embodiments, as shown in fig. 6, the crimp 23 is a rigid crimp strip 23", the binding surface 20a is formed on a wall 21 of the flexible housing 22 facing away from the receiving cavity 20b, and the rigid crimp strip 23" is attached to a side of the flexible housing 22 adjacent to the binding surface 20a. Specifically, the rigid crimp strip 23″ may be provided on the side of the flexible casing 22 adjacent to the binding surface 20a, or the rigid crimp strip 23″ may be provided on both sides of the flexible casing 22 adjacent to the binding surface 20a, which are parallel to each other. It will be appreciated that the rigid crimp strip 23 "is simple in construction and highly reliable in operation.

It will be appreciated that the rigid crimp strip 23 'may be made of metal or plastic, as well as the rigid crimp strip 23'. Preferably, the rigid crimp band 23 "is a metal band having a predetermined stiffness. This allows the crimping assembly 20 to be converted between the reset condition and the extended condition multiple times with high operational reliability.

The cross-sectional shape of the rigid curled strips 23″ is not limited. In some embodiments, as shown in fig. 3, the rigid crimp band 23 "is rectangular in cross-section. In other embodiments, as shown in FIG. 6, the rigid crimp band 23 "is circular in cross-section.

In some embodiments, as shown in fig. 8 a-8 f, the flexible housing 22 has a first wall portion opposite the binding surface 20a. The first wall part is a plane, a convex curved surface, a concave curved surface or a wavy curved surface. It can be appreciated that in the process of curling and flattening the flexible casing 22, the first wall portion opposite to the binding surface 20a can generate deformation with different degrees, and the first wall portion is set to be a plane, a convex curved surface, a concave curved surface or a wavy curved surface according to actual needs, so that deformation stress generated when the flexible casing 22 deforms can be relieved, the fatigue resistance of the flexible casing 22 is effectively improved, and the service life of the flexible casing is prolonged.

Similarly, the side of the flexible casing 22 adjacent to the binding surface 20a may be a flat surface, a convex curved surface, or a concave curved surface, which is not limited thereto.

It will be appreciated that the mechanism for providing the flowable medium to the receiving cavity 20b may be provided within the flexible display device or may be provided external to the flexible display device. In some embodiments, for flexible display devices that do not require frequent switching between a rolled state and a flattened state, such as flexible displays and the like, a mechanism for providing a flowable medium to the receiving cavity 20b may be provided external to the flexible display device to reduce the overall size of the flexible display device. In other embodiments, for flexible display devices that require frequent switching between a rolled state and a flattened state, such as cell phones or tablet computers, etc., a mechanism for providing a flowable medium to the receiving cavity 20b may be provided inside the flexible display device to provide ease of operation.

Illustratively, as shown in fig. 9 and 10, the flexible display device further includes a supply device 30, the supply device 30 being connected to the accommodating chamber 20b, the supply device 30 supplying a flowing medium to the accommodating chamber 20b to vary the pressure inside the accommodating chamber 20b. Specifically, when the flexible display device needs to be flattened, the supply device 30 device supplies the flowing medium to the accommodating chamber 20b, increasing the pressure inside the accommodating chamber 20b. When the flexible display device needs to be curled, the flowing medium may be drawn from the inside of the accommodating chamber 20b by the supply device 30 or may be flowed into the supply device 30 by an external force to reduce the pressure inside the accommodating chamber 20b.

Specifically, the supply device 30 may supply the liquid into the accommodation chamber 20b, or may supply the gas into the accommodation chamber 20b, without limitation, as long as the pressure inside the accommodation chamber 20b can be changed.

It will be appreciated that the specific configuration of the supply device 30 is not limited as long as the flowing medium can be supplied to the accommodating chamber 20b.

Illustratively, as shown in fig. 9, the supply device 30 includes a hydraulic cylinder 31 and a drive assembly 32, the hydraulic cylinder 31 includes a cylinder body 311 and a piston rod 312, the cylinder body 311 and the piston rod 312 enclose a reservoir chamber 31a that accommodates a flowing medium, and the reservoir chamber 31a communicates with a receiving chamber 20b. The drive assembly 32 is connected to the piston rod 312, and the drive assembly 32 is capable of moving the piston rod 312 relative to the cylinder 311.

Specifically, the driving unit 32 provides power for the movement of the piston rod 312 relative to the cylinder 311, and when the driving unit 32 drives the piston rod 312 to move relative to the cylinder 311 in a direction to reduce the volume of the storage chamber 31a, the pressure in the storage chamber 31a increases, so that the flowing medium in the storage chamber 31a is forced to flow into the accommodating chamber 20b, and the pressure in the accommodating chamber 20b increases. When the driving unit 32 drives the piston rod 312 to move relative to the cylinder 311 in a direction to increase the volume of the reservoir chamber 31a, the pressure in the reservoir chamber 31a is small, and the pressure in the reservoir chamber 20b decreases as the flowing medium flows from the reservoir chamber 20b into the reservoir chamber 31 a.

The driving unit 32 may have various configurations, and may use a motor 321, a hydraulic pump, or the like as the driving force.

In some embodiments, as shown in fig. 9, the drive assembly 32 includes a motor 321 and a transmission 322, the motor 321 having an output shaft 3211. The transmission member 322 is connected to the motor 321 and the piston rod 312, the transmission member 322 has an input end and an output end, the input end is connected to the output shaft 3211, and the output end is connected to the piston rod 312. It will be appreciated that the movement of the piston rod 312 in one direction with respect to the cylinder 311 may be achieved by forward rotation of the motor 321, while the movement of the piston rod 312 in the opposite direction with respect to the cylinder 311 may be achieved by reverse rotation of the motor 321.

The specific structure of the transmission 322 is not limited, and as illustrated in fig. 9, the transmission 322 includes a first bevel gear set 3221, a transmission shaft 3222, and a second bevel gear set 3223, the first bevel gear set 3221 being connected to the output shaft 3211 of the motor 321 and the transmission shaft 3222, and the second bevel gear set 3223 being connected to the transmission shaft 3222 and the piston rod 312, for example. At this time, the piston rod 312 and the cylinder 311 may be screwed, and the piston rod 312 may be moved relative to the cylinder 311 while being rotated relative to the cylinder 311, so as to change the volume of the storage chamber 31 a.

In an alternative embodiment, the transmission member 322 includes a cam (not shown) coaxially disposed with the output shaft 3211 of the motor 321, and an outer edge of the cam abuts an end of the piston rod 312 remote from the storage chamber 31 a. The rotation of the cam pushes the piston rod 312 to perform a lift or return movement, and the volume of the storage chamber 31a is reduced or increased.

It will be appreciated that the storage chamber 31a may be provided in direct communication with the receiving chamber 20b, or may be in communication via a conduit, without limitation.

In some embodiments, as shown in fig. 9, the supply device 30 further includes a pipe 33, a wall portion of the cylinder 311 opposite to the piston rod 312 is formed with a communication port, a wall portion of the crimp assembly 20 corresponding to the accommodating chamber 20b is formed with a communication port, and the pipe 33 connects the communication port and the communication port to enable the flowing medium to flow back and forth between the accommodating chamber 20b and the storage chamber 31 a. It will be appreciated that the communication between the conduit 33 and the receiving chamber 20b and the storage chamber 31a is a sealed communication, and that the tightness of the connection may be ensured by applying a sealant to the connection to prevent the flow medium from escaping from the connection between the conduit 33 and the receiving chamber 20b or from the connection between the conduit 33 and the storage chamber 31 a.

In some alternative embodiments, as shown in fig. 10, the supply device 30 includes a storage chamber 31 'for storing the flowing medium and a pump system 32', the pump system 32 'communicating the storage chamber 31' with the receiving chamber 20b. Thus, the pump system 32' may cause the flowing medium in the reservoir chamber 31' to flow to the accommodating chamber 20b, or may cause the flowing medium in the accommodating chamber 20b to flow to the reservoir chamber 31' to increase or decrease the pressure inside the accommodating chamber 20b.

In particular, the pump system 32' may include two pumps that respectively control the flow of the flowing medium in two opposite directions. The pump system 32' may also include a pump that effects flow of the flowing medium in two opposite directions by either forward or reverse rotation of the pump, without limitation.

In addition, the term "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

It should be understood that in embodiments of the present invention, "B corresponding to a" means that B is associated with a, from which B may be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may also determine B from a and/or other information.

The present invention is not limited to the above embodiments, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the present invention, and these modifications and substitutions are intended to be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims

1. A flexible display device, comprising:

a flexible display panel having a display surface and a back surface opposite to each other;

the curling component comprises a wall part and a containing cavity formed by surrounding the wall part, wherein one side surface of the wall part, which is opposite to the containing cavity, is at least partially a binding surface, the back surface of the flexible display panel is bound to the binding surface, the curling component is provided with an extending state and a resetting state, the curling component drives the flexible display panel to curl in the resetting state, the curling component is converted into the extending state from the resetting state according to the increase of the internal pressure of the containing cavity so as to drive the flexible display panel to unfold, and the curling component is converted into the resetting state from the extending state in the process of reducing the internal pressure of the containing cavity to vacuum so as to drive the flexible display panel to curl;

the crimping assembly includes:

a flexible housing, at least a portion of the wall portion being formed in the flexible housing, the flexible housing forming the receiving cavity;

a crimping member coupled to the flexible housing, the crimping member having the extended state and the reset state, the crimping member driving the flexible housing to crimp in the reset state,

the flexible shell is gradually stretched along with the increase of the internal pressure of the accommodating cavity, so that the crimping piece is converted from the reset state to the stretching state, and the flexible shell is driven to be stretched.

2. The flexible display device of claim 1, wherein the crimp member is a rigid crimp sheet, and the binding surface is formed on a side of the rigid crimp sheet facing away from the flexible housing, or on a side of the flexible housing facing away from the rigid crimp sheet.

3. The flexible display device of claim 2, wherein the rigid crimp sheet is a metal sheet having a predetermined stiffness.

4. The flexible display device of claim 1, wherein the crimp member is a rigid crimp strip formed from a wall of the flexible housing facing away from the receiving cavity, the rigid crimp strip being attached to a side of the flexible housing adjacent the binding surface.

5. The flexible display device of claim 4, wherein the rigid crimp strip is a metal strip having a predetermined stiffness.

6. The flexible display device of claim 1, wherein the flexible housing has a first wall portion opposite the binding surface, the first wall portion being planar, convex curved, concave curved, or wavy.

7. A flexible display device, comprising:

the wall part comprises a first side wall part and a second side wall part which are connected with each other, the first side wall part is a rigid curled part, the second side wall part is of a flexible film structure, the first side wall part and the second side wall part are connected with each other to form the accommodating cavity, and the binding surface is positioned on the surface of the first side wall part, which is opposite to one side of the accommodating cavity.

8. A flexible display device as claimed in any one of claims 1 to 7, further comprising a supply device connected to the receiving chamber, the supply device providing a flowing medium to the receiving chamber to vary the pressure inside the receiving chamber.

9. The flexible display device of claim 8, wherein the supply device comprises:

the hydraulic cylinder comprises a cylinder body and a piston rod, wherein a storage cavity for accommodating flowing media is formed by surrounding the cylinder body and the piston rod, and the storage cavity is communicated with the accommodating cavity;

and the driving assembly is connected with the piston rod and can enable the piston rod to move relative to the cylinder body.

10. The flexible display device of claim 9, wherein the drive assembly comprises:

a motor having an output shaft;

the transmission piece is connected with the motor and the piston rod, the transmission piece is provided with an input end and an output end, the input end is connected with the output shaft, and the output end is connected with the piston rod.

11. The flexible display device according to claim 9, wherein the supply device further comprises a pipe, a wall portion of the cylinder body opposite to the piston rod is formed with a communication port, a wall portion of the crimp assembly corresponding to the accommodation chamber is formed with a communication port, and the pipe connects the communication port and the communication port so that the flowing medium can flow back and forth between the accommodation chamber and the storage chamber.

12. The flexible display device of claim 8, wherein the supply device comprises:

a storage chamber for storing a flowing medium;

and a pump system communicating the storage chamber and the accommodating chamber, the pump system being capable of flowing a flowing medium back and forth between the storage chamber and the accommodating chamber.