CN116935744A

CN116935744A - Electronic equipment and flexible display device thereof

Info

Publication number: CN116935744A
Application number: CN202210364353.4A
Authority: CN
Inventors: 孙彬
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-04-08
Filing date: 2022-04-08
Publication date: 2023-10-24
Also published as: WO2023193468A1

Abstract

The application relates to an electronic device and a flexible display device thereof, wherein the flexible display device comprises a flexible screen and an extension mechanism, the flexible screen is provided with a display surface, the flexible screen comprises a fixed part and a free part which are connected, the free part is provided with a magnet, the free part can be unfolded or folded relative to the fixed part in a first direction, the extension mechanism is connected with one side of the flexible screen, which is opposite to the display surface, the extension mechanism comprises a first support piece and a second support piece, the first support piece is relatively fixed with the fixed part, the first support piece and the second support piece can relatively move along the first direction, the second support piece is provided with a magnetic attraction component, and the magnetic attraction component is used for magnetically attracting the magnet so as to adsorb at least part of the structure of the free part to the second support piece. According to the electronic equipment and the flexible display device thereof, the magnetic attraction of the magnetic attraction component to the magnet is utilized to enable at least part of the structure of the free part to be adsorbed on the second supporting piece, so that the free part is prevented from arching, and the flatness of a display picture of the flexible screen is effectively improved.

Description

Electronic equipment and flexible display device thereof

Technical Field

The present application relates to the technical field of electronic devices, and in particular, to an electronic device and a flexible display device thereof.

Background

In the current intelligent information age, users use mobile terminals more and more frequently, and the use scenes are diversified day by day. Most of the current portable intelligent mobile terminals have a screen size below 7 inches, and compared with flat-panel and pen-powered products, the screen display area is limited, and the user operation experience is limited.

The appearance of the flexible screen well solves the problem, and the large screen is contained in the small body through bending or curling of the flexible screen, so that the flexible screen is convenient for a user to carry. Meanwhile, the small screen is used as a normal mobile phone, when the large screen is switched to, news reading and social chat can be achieved, meanwhile, game operation experience of a user can be improved, and use scenes of the user are greatly enriched.

However, when the flexible screen of the current electronic device adopts a curling mode to realize adjustment of the size of the display area, the flexible screen cannot be well supported and is easy to generate local collapse, or local stress is easy to generate due to the arrangement of the supporting structure, a doming phenomenon occurs, the flexible screen is poor in flatness of the display picture no matter local collapse or doming occurs, the texture of the display picture is adversely affected, and the use experience of a user is poor.

Disclosure of Invention

The application provides electronic equipment and a flexible display device thereof, which aim to solve the technical problem of poor flatness of a display picture of the flexible display device.

In one aspect, an embodiment of the present application provides a flexible display device, including:

the flexible screen is provided with a display surface and comprises a fixed part and a free part which are connected, wherein the free part is provided with a magnet and can be unfolded or folded relative to the fixed part in a first direction;

the stretching mechanism is connected with one side of the flexible screen, which is opposite to the display surface, and comprises a first supporting piece and a second supporting piece, wherein the first supporting piece is relatively fixed with the fixed part, the first supporting piece and the second supporting piece can relatively move along the first direction so that the free part is unfolded or folded, and the second supporting piece is provided with a magnetic attraction component which is used for magnetically attracting the magnet so as to adsorb at least part of the structure of the free part to the second supporting piece.

In another aspect, embodiments of the present application provide an electronic device including a housing assembly and a flexible display device as described above, the housing assembly being connected to the stretching mechanism, and a portion of the structure of the flexible screen being displayed from or received in the housing assembly with relative movement of the first support and the second support.

In the embodiment of the application, the free part of the flexible screen is provided with the magnet, the second support piece is provided with the magnetic attraction component, the magnetic attraction component is used for magnetically attracting the magnet, and the magnetic attraction of the magnetic attraction component to the magnet is utilized to enable at least part of the structure of the free part to be attracted to the second support piece, so that the free part is prevented from arching, and the flatness of a display picture of the flexible screen is effectively improved.

Drawings

In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a first state of an electronic device according to an embodiment of the present application;

fig. 2 is a schematic diagram of a second state of the electronic device according to an embodiment of the present application;

fig. 3 is an exploded schematic view of a flexible display device when the electronic device provided in the embodiment of the present application is in a first state;

FIG. 4 is a schematic view of the stretching mechanism of the flexible display device shown in FIG. 3 in a second state;

fig. 5 is a schematic structural view of a flexible display device according to another embodiment;

FIG. 6 is a schematic cross-sectional view of an electronic device according to an embodiment in a first state;

FIG. 7 is a schematic cross-sectional view of an electronic device according to an embodiment in a second state;

FIG. 8 is a schematic diagram showing the arrangement positions of a first magnet and a second magnet in a flexible display device according to an embodiment;

FIG. 9 is a magnetic induction versus distance plot based on the arrangement of the first magnet and the second magnet of the flexible display device shown in FIG. 8;

FIG. 10 is a schematic diagram showing the positions of magnetically sensitive areas of a first magnet and a second magnet in an arrangement in a flexible display device according to an embodiment;

FIG. 11 is a schematic diagram showing the positions of magnetically sensitive areas of another arrangement of the first and second magnets in the flexible display device according to an embodiment;

FIG. 12 is a schematic view showing the positions of magnetically sensitive areas of a flexible display device according to an embodiment in which the first and second magnets are arranged in a different arrangement;

FIG. 13 is a schematic view showing the arrangement positions of a first magnet and a second magnet of a flexible display device according to another embodiment with respect to a magnetically sensitive area;

FIG. 14 is a schematic view showing the arrangement positions of a first magnet and a second magnet of a flexible display device according to another embodiment with respect to a magnetically sensitive area;

FIG. 15 is a schematic structural view of a magnetic assembly of a flexible display device according to an embodiment;

fig. 16 is a schematic structural view of a magnetic attraction assembly of a flexible display device according to another embodiment.

Reference numerals illustrate:

100. an electronic device; 10. a housing assembly; 10a, a receiving cavity; 12. a first housing; 14. a second housing; 20. a flexible display device; 21. a flexible screen; 212. a fixing part; 214. a free portion; 21a, a display surface; 22. an extension mechanism; 221. a first support; 2211. a spinal rod; 2212. a skeleton; 222. a second support; 2221. a slot; 211. a magnet; 223. a first magnet; 224. a second magnet; 225. a wave absorbing member; 226. a magnetism isolating member; C. a magnetically sensitive region; a. a first intersection point; b. a second intersection point; 30. an electromagnetic coil; 30a, an iron core; 40. a hall sensor; 50. a traction member; 60. a driving mechanism.

Detailed Description

In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended drawings. Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

As used herein, "electronic device" refers to a device capable of receiving and/or transmitting communication signals that includes, but is not limited to, a device connected via any one or several of the following connections:

(1) Via a wireline connection, such as via a public-switched telephone network (Public Switched Telephone Networks, PSTN), a digital subscriber line (Digital Subscriber Line, DSL), a digital cable, a direct cable connection;

(2) Via a wireless interface, such as a cellular network, a wireless local area network (Wireless Local Area Network, WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter.

An electronic device arranged to communicate over a wireless interface may be referred to as a "mobile terminal". Examples of mobile terminals include, but are not limited to, the following electronic devices:

(1) Satellite phones or cellular phones;

(2) A personal communications system (Personal Communications System, PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities;

(3) A radiotelephone, pager, internet/intranet access, web browser, notepad, calendar, personal digital assistant (Personal Digital Assistant, PDA) equipped with a global positioning system (Global Positioning System, GPS) receiver;

(4) Conventional laptop and/or palmtop receivers;

(5) Conventional laptop and/or palmtop radiotelephone transceivers, and the like.

Referring to fig. 1 and fig. 2, an electronic device 100 according to an embodiment of the present application may be a mobile phone or a tablet computer, which is not limited herein.

The electronic device 100 includes a housing assembly 10 and a flexible display device 20. The housing assembly 10 forms a receiving cavity 10a, and the flexible display device 20 is connected to the housing assembly 10. The electronic device 100 may further include a circuit board (not shown) and a battery (not shown), both of which may be disposed within the receiving cavity 10a (see fig. 6) of the housing assembly 10. The circuit board may integrate the processor, power management module, memory unit, baseband chip, etc. of the electronic device 100. The flexible display device 20 is communicatively coupled to the processor and the battery is capable of powering the flexible display device 20 and the electronic components on the circuit board. Of course, the electronic device 100 may further include a camera module (not shown), where the camera module is communicatively connected to the circuit board, and the battery can supply power to the camera module. It is understood that the electronic device 100 according to the embodiment of the present application includes, but is not limited to, a terminal device such as a mobile phone, a tablet computer, or other portable electronic devices 100. In the embodiment of the present application, a mobile phone will be described as an example.

As shown in fig. 3 and 4, the flexible display device 20 includes a flexible screen 21 and an extension mechanism 22, the flexible screen 21 having a display surface 21a, the extension mechanism 22 being connected to a side of the flexible screen 21 facing away from the display surface 21a for supporting an expanded portion of the flexible screen 21.

Specifically, the flexible screen 21 includes a fixed portion 212 and a free portion 214 connected to each other, and the free portion 214 can be unfolded or folded relative to the fixed portion 212 in a first direction, specifically, the free portion 214 of the flexible screen 21 can be bent, so as to adjust the unfolded length of the free portion 214 relative to the fixed portion 212, so as to adjust the length of the display screen of the flexible screen 21 in the first direction (i.e. the unfolded length of the display screen of the flexible screen 21). In some embodiments, the free portion 214 may be folded in the first direction in a curling direction, or may be folded in half in the first direction, which is not limited herein.

The stretching mechanism 22 is connected to a side of the flexible screen 21 facing away from the display surface 21a, and the stretching mechanism 22 includes a first supporting member 221 and a second supporting member 222, where the first supporting member 221 is fixed relative to the fixed portion 212, and the first supporting member 221 and the second supporting member 222 can move relative to each other along a first direction, so that the free portion 214 is unfolded or folded. The flexible screen 21 is supported by the first support 221 and the second support 222.

In the embodiment of the application, the two objects are relatively fixed in position, namely, the two objects cannot generate relative motion under normal conditions, and the two objects with relatively fixed positions can be physically and directly connected, or can be indirectly connected through an intermediate structure. Taking the fixing portion 212 and the first supporting member 221 as examples, the positions of the fixing portion 212 and the first supporting member 221 may be fixed relatively, for example, the fixing portion 212 and the first supporting member 221 may be in direct contact, for example, the fixing portion 212 and the first supporting member 221 may be directly fixed by using a threaded fastener or a clamping manner, or the fixing portion 212 may be indirectly fixed to the first supporting member 221 by using an adhesive layer, an intermediate connecting plate, or other structures. In some embodiments, the fixing portion 212 may be fixedly coupled to the case assembly 10, and the case assembly 10 is relatively fixed to the first support 221 such that the fixing portion 212 is relatively fixed to the first support 221. For the implementation manner of the relative fixation between the fixing portion 212 and the first supporting member 221, a description thereof will be omitted.

As further shown in fig. 3 and 4, the free portion 214 is provided with a magnet 211, and the second support 222 is provided with a magnetic attraction assembly, where it should be noted that the magnetic attraction assembly may be directly mounted on the second support 222, or may be indirectly connected to the second support 222 through an intermediate structure, for example, in an embodiment in which the housing assembly 10 includes the first housing 12 and the second housing 14, and the second support 222 is relatively fixed to the second housing 14, the magnetic attraction assembly may be mounted on the second housing 14, so that the magnetic attraction assembly is connected to the second support 22 by using the relative fixation between the second housing 14 and the second support 22. The arrangement of the magnetic assembly is not described herein, as long as the magnetic assembly can exert its corresponding function and does not interfere with the expansion or contraction of the flexible display device 20.

Specifically, the magnetic component is used for magnetically attracting the magnet 211 to adsorb at least part of the structure of the free portion 214 to the second support 222, so that a good adherence effect is maintained between the free portion 214 and the second support 222, and the free portion 214 is prevented from being separated from the second support 222 to generate a camber, so that the overall flatness of the picture displayed by the flexible screen 21 is improved and the user experience is improved through the magnetic cooperation of the magnetic component and the magnet 211.

The magnet 211 is made of a magnetic material such as iron, cobalt, nickel, manganese, or the like that can be attracted to the magnet, and an alloy thereof, so that the magnet 211 can be attracted to the magnet assembly.

The shape of the magnet 211 may be a bar shape or a sheet shape. For example, in some embodiments, the magnet 211 includes a plurality of magnetic support bars, the plurality of magnetic support bars are arranged at intervals along the first direction, and the length direction of each magnetic support bar is perpendicular to the first direction, so that the arrangement of the magnetic support bars does not interfere with the bending of the flexible screen 21 in the first direction, and therefore, the magnetic support bars can not only generate a supporting effect on the flexible screen 21 in the direction perpendicular to the first mode, but also promote the supporting effect of the second support 222 on the flexible screen 21 when the magnetic support bars are absorbed by the magnetic absorbing component on the second support 222, so as to avoid the arching of the flexible screen 21, and effectively promote the picture flatness of the unfolding portion of the flexible screen 21.

In some embodiments, the magnet 211 includes a magnetic rubber sheet that is attached to a side of the flexible screen 21 facing away from the display surface 21a and is bendable along with the free portion 214. The magnetic rubber sheet meets the magnetic adsorption requirement of the magnetic attraction assembly, and meanwhile, the magnetic rubber sheet is good in flexibility, can be bent along with the free portion 214, and does not affect the unfolding and folding of the flexible screen 21.

Of course, the magnet 211 may also be made of a magnetic material to form a film member that may be provided in the flexible screen 21 as a layer structure of the flexible screen 21. By this structural arrangement, the magnet 211 can be adapted to the requirement of bending the flexible screen 21 in the first direction, and also can meet the adsorption requirement of the magnetic assembly. The shape of the magnet 211 is not described herein, as long as it can adapt to the bending requirement of the flexible screen 21, and at the same time, it can be attracted by the magnetic component.

The magnet assembly comprises a magnet, and the type of the magnet can be neodymium-iron-boron magnet, samarium-cobalt magnet or alnico magnet.

In the embodiment of the present application, the housing assembly 10 is connected to the telescopic mechanism, and the housing assembly 10 can adapt to the requirement of the relative movement of the first support 221 and the second support 222 of the telescopic mechanism, that is, the housing assembly 10 does not interfere with the relative movement between the first support 221 and the second support 222.

Specifically, upon the relative movement of the first support 221 and the second support 222, the flexible screen 21 is unfolded from the case assembly 10 or is retracted into the case assembly 10, thereby adjusting the unfolded length of the display screen of the flexible screen 21.

In some embodiments, the flexible display device 20 adjusts the expansion length of the display screen of the flexible screen 21 in a single-side stretching manner in the first direction, or adjusts the expansion length of the display screen of the flexible screen 21 in a double-side stretching manner in the first direction. It should be noted that the single-side extension and the double-side extension refer to the extension of the flexible screen 21, specifically, the single-side extension refers to that the free portion 214 of the flexible screen 21 is extended or retracted at one side of the fixed portion 212, in which case the free portion 214 may be considered to be disposed at one side of the fixed portion 212. Accordingly, the double-sided extension means that the flexible screen 21 can be unfolded or folded at both sides of the fixing portion 212 in the first direction, and in this case, it can be considered that the flexible screen 21 includes 2 free portions 214, and the 2 free portions 214 are respectively connected to both ends of the fixing portion 212.

For ease of understanding, the structure of flexible display device 20 will be further described below with respect to one-sided extension as well as two-sided extension of flexible screen 21.

In the embodiment shown in connection with fig. 1-4 in which the flexible screen 21 is stretched on one side, the housing assembly 10 includes a first housing 12 and a second housing 14, the second housing 14 and the first housing 12 being capable of relative movement in a first direction to accommodate relative movement of the first support 221 and the second support 222 in the first direction to support the stretched portion of the flexible screen 21. Specifically, the stretching mechanism 22 is located in the space enclosed by the case assembly 10 and supports the site where the flexible screen 21 is stretched. The first supporting member 221 is fixed relative to the first housing 12, and the second supporting member 222 is fixed relative to the second housing 14, so that the first supporting member 221 and the second supporting member 222 move synchronously when the first housing 12 and the second housing 14 move relatively in the first direction.

The second housing 14 is slidably coupled to the first housing 12. In other words, the second housing 14 is capable of sliding relative to the first housing 12. For example, one of the first and second housings 12 and 14 may be provided with a slide rail along which the other can slide to enable the first and second housings 12 and 14 to move telescopically with each other.

The flexible screen 21 is connected to the first housing 12 and the second housing 14. With the relative movement of the first housing 12 and the second housing 14, a portion of the structure of the flexible screen 21 is either deployed from within the housing assembly 10 or is stowed within the housing assembly 10 for the purpose of adjusting the deployment length of the flexible screen 21.

Further, the first housing 12 is slidable in a first direction relative to the second housing 14 to a first position and a second position. As shown in fig. 1, when the first housing 12 is in the first position, the electronic device 100 has a relatively small external dimension and is convenient to carry. Referring to fig. 2, when the first housing 12 is in the second position, the electronic device 100 may obtain a relatively large area of the display surface 21a, so as to obtain a visual experience of the large screen display, so as to improve the use experience of the electronic device 100. Thus, with this arrangement, the area of the display screen of the flexible screen 21 can be adjusted by the relative sliding expansion and contraction of the first housing 12 and the second housing 14.

It is to be understood that in the following embodiments of the present application, the first position, the second position, and the like refer to the relative positions of the first housing 12 and the second housing 14. For simplicity, the similar expressions "first housing 12 is in the first position" or "in the first position" refer to first housing 12 being in the first position relative to second housing 14, and the similar expressions "first housing 12 is in the second position" or "in the second position" refer to first housing 12 being in the second position relative to second housing 14. As can be appreciated, since the first supporting member 221 is relatively fixed to the first housing 12 and the second supporting member 222 is relatively fixed to the second housing 14, when the first housing 12 is located at the first position relative to the second housing 14, the first supporting member 221 is also located at the first position relative to the second supporting member 222; accordingly, when the first housing 12 is located at the second position relative to the second housing 14, the first supporting member 221 is also located at the second position relative to the second supporting member 222.

As shown in fig. 1 and 2, in some embodiments, when the first housing 12 is in the first position, the portion of the display surface 21a of the flexible screen 21 exposed outside the housing assembly 10 is substantially rectangular, and the size of the portion may be 4.5 inches to 7 inches, that is, the size of the display screen of a typical smart phone is equivalent to that of the display screen, so that the electronic device 100 is convenient to carry and use. When the first housing 12 is in the second position, the display surface 21a of the flexible screen 21 is more exposed to the housing assembly 10 than when the first housing 12 is in the first position, thereby presenting a larger display screen and realizing a large-screen display effect.

In the embodiment of the flexible screen 21 including 2 free portions 214 as shown in fig. 5, the 2 free portions 214 are respectively connected to two ends of the fixed portion 212, and the first supporting member 221 is provided with second supporting members 222 at opposite sides in the first direction, wherein one of the second supporting members 222 is used for supporting one of the free portions 214 of the flexible screen 21, and the other of the second supporting members 222 is used for supporting the other of the free portions 214 of the flexible screen 21. In this embodiment, when the second support 222 on one side moves in the first direction relative to the first support 221, the free portion 214 on the side is unfolded or folded. When the second support 222 on the other side moves in the first direction relative to the first support 221, the other free portion 214 is unfolded or folded. Therefore, with this structural arrangement, the flexible display device 20 can realize the double-sided extension of the flexible screen 21 to increase the size of the display screen of the flexible screen 21, obtain a good large-screen display effect, and accordingly, when large-screen display is not required, the flexible display device 20 can be folded, improving portability.

In this embodiment, the housing assembly 10 may further include a third housing (not shown) that is movable in the first direction relative to the first housing 12. It should be noted that, the second housing 14 and the third housing are respectively located at two sides of the first housing 12 in the first direction and are respectively fixed with the second supporting members 222 at the corresponding sides, so that the housing assembly 10 can not only adapt to the stretching requirement of the flexible display device 20, but also adapt to the requirement of accommodating the non-stretched portion of the flexible screen 21 and the stretching mechanism 22, so as to maintain the aesthetic feeling of the overall appearance of the electronic device 100.

In the embodiment of the present application, the mating structure of the first support 221 and the second support 222 has various embodiments. The first supporting member 221 and the second supporting member 222 are slidably connected to each other, or the first supporting member 221 and the second supporting member 222 are provided on a common sliding member, and the connection manner between the first supporting member 221 and the second supporting member 222 is not limited herein.

For ease of understanding, the mechanism of the stretching mechanism 22 is further described below by way of example in connection with the first support 221 and the second support 222.

As shown in fig. 3 and fig. 4, the second supporting member 222 is provided with a plurality of slots 2221, and the plurality of slots 2221 extend along a first direction and are arranged parallel to each other along a second direction, and the second direction is perpendicular to the first direction. The first supporting member 221 includes a backbone 2211 and a plurality of skeletons 2212 connected to the backbone 2211, the skeletons 2212 are arranged in a comb shape, and the skeletons 2212 are movably inserted into the slots 2221.

It should be noted that, the skeleton 2212 and the slot 2221 are two objects of sliding fit, and their setting positions in the first support 221 and the second support 222 may be interchanged, specifically, the slot 2221 may be formed on the first support 221, and accordingly, the second support 222 includes the spine 2211 and a plurality of skeletons 2212 connected to the spine 2211, so that the first support 221 and the second support 222 may relatively move along the first direction by using the fitting of the skeletons 2212 and the slot 2221.

In the embodiment in which the second supporting members 222 are disposed on two opposite sides of the first supporting member 221 in the first direction as shown in fig. 5, the mating structures of the two second supporting members 222 and the first supporting member 221 may be the same, that is, the mating structures between the two second supporting members 222 and the first supporting member 221 are the slots 2221 and the skeleton 2212. Illustratively, in some embodiments, the first support 221 is provided with a socket 2221 and a skeleton 2212 at both sides in the first direction, respectively, wherein the second support 222 at one side is provided with the skeleton 2212 mated with the socket 2221 of the first support 221, and the second support 222 at the other side is provided with the socket 2221 mated with the skeleton 2212 of the first support 221. For another example, in some embodiments, the first support 221 is provided with slots 2221 at opposite sides in the first direction, and the two second supports 222 each include a skeleton 2212 that mates with the slots 2221, or the first support 221 is provided with skeletons 2212 at opposite sides in the first direction, and the two second supports 222 each include slots 2221 that mate with the skeletons 2212.

It should be noted that the mating structures of the two second supporting members 222 and the first supporting member 221 may be different, so long as the two second supporting members 222 can move telescopically along the first direction relative to the first supporting member 221, so as to meet the requirement of supporting the unfolding portions of the 2 free portions 214 of the flexible screen 21.

In the embodiment of the application, based on the magnetic attraction force of the magnetic attraction component arranged on the second support 222 to the magnet 211, at least part of the structure of the free portion 214 is adsorbed on the second support 222, so that the free portion 214 will not arch when being unfolded or folded, and the flatness of the display screen of the flexible screen 21 is improved.

There are various embodiments of the arrangement of the magnetic attraction assembly in the second support 222, and the arrangement of the magnetic attraction assembly is described below by way of example only, but is not limited thereto.

In some embodiments, the second support 222 is provided with a mounting groove (not shown), and the magnetic component is mounted in the mounting groove, so that the magnetic component and the second support 222 have good stability, and the magnetic component is not easy to separate from the second support 222. It will be appreciated that the mounting of the magnet assembly within the mounting slot is not too abrupt so that the second support 222 provides good support for the flexible screen 21. The second support 222 may be supported by a magnetic material, so that the magnetic attraction assembly attracts the second support 222 by its own magnetism to enhance the mounting stability. In some embodiments, the magnetic component may be connected to the second support 222 by glue bonding, screw connection, or the like, so as to further improve the mounting stability of the magnetic component in the mounting groove. The mounting manner of the magnetic attraction assembly is not limited herein. In other embodiments, the magnetic attraction assembly may be disposed on the second support 222 in other manners, for example, the second support 222 is provided with a magnetization portion for magnetizing to form the magnetic attraction assembly. Wherein the magnetization part is made of magnetic materials such as iron, cobalt, nickel, manganese and the like so as to obtain the magnetic assembly through magnetization.

Whether the magnet assembly includes a plurality of magnets or a plurality of magnetized portions, or the magnet assembly includes a plurality of magnets and a plurality of magnetized portions. The magnets and magnetized portions may be located on the same plane or on different planes. Taking the example that the magnetic attraction assembly includes a plurality of magnets, some of the plurality of magnets may be disposed on a surface of the second support 222 facing the flexible screen 21, and other of the plurality of magnets may be disposed on a surface of the second support 222 facing away from the flexible screen 21. Further, in the embodiment where the second support 222 is provided with a mounting groove for mounting the magnet, the side of the second support 222 facing toward and away from the flexible screen 21 is provided with a mounting groove to accommodate the need for mounting the magnet on opposite sides of the second support 222. It will be appreciated that the plurality of magnets may also all be mounted on the same side of the second support 222, e.g. the plurality of magnets are each connected to the side of the second support 222 facing the flexible screen 21, or the plurality of magnets are each connected to the side of the second support 222 facing away from the flexible screen 21.

Accordingly, in the embodiment where the magnetic assembly includes the magnetization portion, the arrangement of the magnetization portion may refer to the arrangement of the magnet, which is not described herein.

Here, since the magnetization portion can generate magnetism by magnetizing, when the second support 222 is processed, a portion of the second support 222 where the magnetization portion is to be formed can be filled with a magnetization material, so that the magnetization portion and the second support 222 are integrated, and the overall stability of the integrated structure is good, and only the magnetization portion at the corresponding position is needed to be magnetized, so that a magnet assembly capable of attracting the magnet 211 can be obtained.

In the magnetizing process, the polarity orientations of different magnetized parts can be conveniently configured by adjusting the magnetizing direction. For example, the south poles of some of the magnetizations are directed toward the display surface 21a and the south poles of other magnetizations are directed away from the display surface 21a, such that the magnetic inductances of these magnetizations in specific regions (e.g., "magnetically sensitive regions C" hereinafter) are mutually diminished.

Specifically, in some embodiments, by improving the arrangement manner of the magnetic attraction component in the second support 222, the magnetic field environment generated by the magnetic attraction component in the second support 222 is beneficial to improving the attraction force between the magnetic attraction component and the magnet 211 on the flexible screen 21, so as to reduce the risk of the flexible screen 21 arching, and reduce the magnetic interference of the magnetic sensitive element arranged in the electronic device 100 or the flexible display device 20.

For ease of understanding, the following description will take the example in which the magnet assembly includes a plurality of magnets as shown in fig. 4. The region for disposing the magnetosensitive element is hereinafter referred to as "magnetosensitive region C".

In some embodiments, the flexible display device 20 has at least one magnetically sensitive region C, the relative position of which to the first support 221 or the second support 222 is fixed. It is understood that the magnetic sensitive area C is used as an area where the magnetic sensitive element is disposed, and the lower the magnetic induction intensity of the magnetic attraction assembly in this area is, the smaller the magnetic interference generated by the magnetic attraction assembly on the magnetic sensitive element is.

The plurality of magnets of the magnet assembly are disposed with different magnetic pole orientations, and for convenience of description, a magnet in which a north pole is oriented toward the display surface 21a is referred to as a "first magnet 223", and a magnet in which a south pole is oriented toward the display surface 21a is referred to as a "second magnet 224". Specifically, the magnetic attraction assembly includes a plurality of first magnets 223 and a plurality of second magnets 224, wherein in a magnetic field environment of the magnetic attraction assembly, a north pole of the first magnet 223 faces the display surface 21a, a south pole of the first magnet 223 faces away from the display surface 21a, a south pole of the second magnet 224 faces away from the display surface 21a.

In this embodiment, when the flexible display device 20 is unfolded to the preset position, the magnetic induction intensities of the first magnet 223 and the second magnet 224 in the magnetic sensitive area C are mutually weakened, so that the magnetic induction intensities of the first magnet 223 and the second magnet 224 in the magnetic sensitive area C are not only not overlapped, but also are mutually weaker, so that the overall magnetic induction intensity of the magnetic sensitive area C is at a low level, thereby reducing the magnetic interference to the magnetic sensitive element disposed in the magnetic sensitive area C as much as possible. In some embodiments, the magnetic induction of the first magnet 223 and the second magnet 224 in the magnetically sensitive area C is completely cancelled, so that the magnetic induction of the magnetically sensitive area C is reduced to 0, and at this time, the magnetically sensitive element is not completely interfered by the magnetism of the magnetically attractive component.

The preset position is a fully extended position or a fully retracted position of the flexible screen 21. In some embodiments, the preset position is one of intermediate positions between the fully extended position and the fully retracted position of the flexible screen 21, for example, 1/10, 1/9, 1/7, 1/6, 1/4, 1/3, or 1/2 of the maximum extended length of the flexible screen 21 when fully extended.

In the embodiment where the flexible display device 20 is provided with the magnetic sensor, when the flexible display device 20 is unfolded to a preset position, the magnetic sensor is located in the magnetic sensitive area C of the flexible display device 20, and the magnetic induction intensity of the magnetic attraction component in the magnetic sensitive area C is smaller than or equal to the critical value that the magnetic sensor can bear the magnetic field interference. If the threshold value of the magnetic sensor capable of withstanding the magnetic field interference is B, when the flexible display device 20 is unfolded to the preset position, the magnetic induction intensity of the magnetic attraction assembly in the magnetic sensitive area C is less than or equal to B.

In the embodiment, under the preset position, the magnetic induction intensity of the magnetic attraction component on the magnetic sensitive element is in the range that the magnetic sensitive element can bear, so that the magnetic sensitive element can normally play a corresponding function.

In some embodiments, the magneto-sensitive element is a geomagnetic sensor for detecting the earth's magnetic field, so that the electronic device 100 implements a compass function.

In some embodiments, as shown in connection with fig. 6 and 7, the magneto-sensitive element may be a hall sensor 40 for detecting an in-place signal when the flexible display device 20 is unfolded or folded to a preset position, for example, when the flexible screen 21 is unfolded to a maximum unfolded length, the hall sensor 40 detects the in-place signal, and the flexible screen 21 of the electronic device 100 will stop being unfolded or folded. Of course, the Hall sensor 40 is disposed at other positions of the electronic device 100 to detect the in-place signal when the flexible screen 21 is unfolded to a position of, for example, 1/10, 1/9, 1/7, 1/6, 1/4, 1/3 or 1/2. The magnetic induction intensity of the magnetic attraction assembly to the magnetic sensitive element is in the range that the magnetic sensitive element can bear because the magnetic attraction assembly is positioned at the preset position, so that the geomagnetic sensor and the hall sensor 40 can normally play a corresponding role.

The flexible display device 20 is electrically connected with a controller (not shown), and the controller is electrically connected with an electromagnetic coil 30 (see fig. 6 and 7), when the magnetic induction intensity of the magnetic attraction component in the magnetic sensitive area C is greater than the critical value of the magnetic field interference that the magnetic sensitive element can bear, the controller is used for controlling the electromagnetic coil 30 to generate a magnetic field opposite to the magnetic field direction of the magnetic attraction component according to the magnetic induction intensity of the magnetic attraction component in the magnetic sensitive area C detected by the magnetic sensitive element, so as to further reduce the magnetic induction intensity of the magnetic sensitive area C, and enable the magnetic induction intensity of the magnetic sensitive area C to be restored below the critical value of the magnetic field interference that the magnetic sensitive element can bear. Of course, the magnetic induction intensity of the magnetic sensitive area C can be adjusted to 0 by using the electromagnetic coil 30, so that the sensitive element positioned in the magnetic sensitive area C is not interfered by the magnetism of the magnetic attraction assembly during operation.

It should be noted that, the iron core 30a may be disposed in the electromagnetic coil 30, so that the electromagnetic coil 30 with the iron core 30a may generate a larger magnetic field when the electromagnetic coil 30 is energized with the same current, so as to facilitate improving the efficiency of adjusting the magnetic induction intensity of the magnetically sensitive area C.

In some embodiments, the absolute value of the sum of the magnetic inductances of the plurality of first magnets 223 in the magnetically sensitive area C is equal to the absolute value of the sum of the magnetic inductances of the plurality of second magnets 224 in the magnetically sensitive area C. In this embodiment, the magnetic induction intensities of the first magnets 223 and the second magnets 224 in the magnetic sensitive area C are completely cancelled, so that the magnetic induction intensity of the magnetic sensitive area C is 0, and thus the magnetic sensitive element corresponding to the magnetic sensitive area C will not be interfered by the magnetic attraction assembly.

In some embodiments, the first magnets 223 and the second magnets 224 are all magnets of the same specification, and the number of the first magnets 223 and the second magnets 224 is equal, and the first magnets 223 and the second magnets 224 are symmetrically arranged in pairs with the straight line of the magnetization sensitive area C as the symmetry axis. The same-sized magnets refer to magnets having the same dimensions and the same apparent magnetic size.

For ease of understanding, as shown in fig. 8, the magnet having the north pole facing the display surface 21a is denoted as "", and the magnet having the south pole facing the display surface 21a is denoted as "", in fig. 8Fig. 8 shows that the first magnet 223 and the second magnet 224 are symmetrically arranged with respect to the symmetry line o. Wherein, the projection line of the symmetry line o on the display surface 21a of the flexible screen and the edge of the display surface 21a intersect at a first intersection point a and a second intersection point b in the second direction, and the midpoint of the connection line of the first magnet 223 and the second magnet 224 is located near or coincides with the midpoint of the connection line of the first intersection point a and the second intersection point b. The magnetic induction intensity is measured by moving the magnetic field measuring instrument along the symmetry line from the first intersection point a to the second intersection point b, and a magnetic induction intensity-distance relationship diagram as shown in fig. 9 is obtained. As can be seen from fig. 9, the magnetic induction intensity at the position close to the first intersection point a tends to 0, and the magnetic induction intensity measured by the magnetic field measuring instrument gradually increases as it moves from the first intersection point a to the second intersection point b, and a maximum value occurs at the intermediate position (the distance from the first intersection point a is around 1.50 mm) between the first intersection point a and the second intersection point b, and then gradually decreases as it approaches the second intersection point b, and finally tends to 0. Therefore, when the first magnet 223 and the second magnet 224 are arranged in a mode of opposite magnetic poles, a position where the magnetic induction intensity tends to be 0 can be found at the symmetrical line position, and the position is set as a magnetic sensitive area C, and the magnetic sensitive element arranged in the magnetic sensitive area C is not interfered by the magnetism of the magnetic attraction component.

For example, as shown in fig. 10, the distance between the magnetically sensitive area C and the first intersection point a is e, and the value of e may be set according to the magnetic field requirement of the corresponding position, for example, taking the line of change of magnetic induction intensity-distance as shown in fig. 9 as an example, when the critical value of the magnetic field interference that can be borne by the magnetically sensitive element at the magnetically sensitive area is 12.5mT, the value range of e between the first intersection point a and the second intersection point b, which meets the requirement of the magnetically sensitive area C, is 0mm to 1.25mm and 1.75mm to 3.50mm.

As shown in fig. 11, the first magnets 223 and the second magnets 224 that are symmetrically disposed may be plural, that is, the first magnets 223 and the second magnets 224 that are equal in number are symmetrically disposed in pairs with the straight line of the magnetization-sensitive region C as the symmetry axis. In this way, the magnetic induction intensity of the magnetically sensitive area can be below the critical value of the magnetic field interference that the magnetically sensitive element can bear.

It should be noted that, the arrangement of the plurality of first magnets 223 and the plurality of second magnets 224 is not limited to the above-mentioned exemplary case, and in some embodiments, other arrangements may be adopted, as long as the magnetic induction intensity of the corresponding sensitive area is below the critical value where the magnetic sensor can withstand the magnetic field interference.

The arrangement of the first magnet 223 and the second magnet 224 is described below by way of example only.

For example, as shown in connection with fig. 12, in some embodiments, the first magnets 223 and the second magnets 224 are alternately arranged on the second support 222 in the first direction, and the first magnets 223 and the second magnets 224 are alternately arranged on the second support 222 in the direction perpendicular to the first direction.

In some embodiments, e first magnets 223 form a first magnetic attraction unit, f second magnets 224 form a second magnetic attraction unit, e, f are natural numbers, and e is greater than f. For example, as shown in fig. 13, 1 first magnet 223 constitutes one first magnetic attraction unit, and 2 second magnets 224 constitute one second magnetic attraction unit.

The absolute value of the magnetic induction intensity of the first magnetic attraction unit in the magnetic sensitive area C is equal to that of the second magnetic attraction unit in the magnetic sensitive area C. With this arrangement, even if the magnetic induction of any one of the first magnets 223 in the magnetic sensitive area C is smaller than the magnetic induction of any one of the second magnets 224 in the magnetic sensitive area C, by configuring different numbers of the second magnets 224 and the first magnets 223, the magnetic induction of their combinations in the magnetic sensitive area C is mutually weakened or counteracted, so as to facilitate reducing the magnetic interference to the magnetic sensitive element.

In some embodiments, the magnetic induction of any one of the first magnets 223 in the third magnetically attractable unit is greater in the magnetically sensitive area C than the magnetic induction of any one of the second magnets 224 in the fourth magnetically attractable unit. In this embodiment, m first magnets 223 form a third magnetic attraction unit, n second magnets 224 form a fourth magnetic attraction unit, m and n are natural numbers, m is smaller than n, and the absolute value of the magnetic induction intensity of the third magnetic attraction unit in the magnetic sensitive area C is equal to the absolute value of the magnetic induction intensity of the fourth magnetic attraction unit in the magnetic sensitive area C.

Referring to fig. 14, at least 1 first magnet 223 and at least 1 second magnet 224 have the same dimensions and are symmetrically arranged in pairs with a straight line of the magnetically susceptible region C as a symmetry axis. It should be noted that fig. 14 schematically shows only the first magnet 223 and the second magnet 224 arranged in 4 pairs, which are arranged in an axisymmetric manner. The symmetry axes of the first magnet 223 and the second magnet 224 disposed in pairs may be the same or different, and will not be described herein.

In some embodiments, the magnetic induction of the sensitive area is also reduced by providing a wave absorbing member or a magnetic shielding member.

As shown in fig. 15, the magnetic induction of the second magnets 224 to the magnetically sensitive area C is stronger, and the magnetic attraction assembly further includes a plurality of wave-absorbing members 225, wherein the wave-absorbing members 225 are disposed on one of the first magnets 223 and the second magnets 224 with stronger magnetic induction to the magnetically sensitive area C, and the wave-absorbing members 225 face to the side of the magnetically sensitive area C to reduce the magnetic induction of the magnetically sensitive area C.

As shown in fig. 16, the magnetic attraction assembly further includes a plurality of magnetic isolation members 226, wherein the plurality of magnetic isolation members 226 are disposed on one of the plurality of first magnets 223 and the plurality of second magnets 224 with higher magnetic induction intensity to the magnetic sensitive area C, and the magnetic isolation members 226 face to the side of the magnetic sensitive area C to reduce the magnetic induction intensity of the magnetic sensitive area C.

For the arrangement of the wave absorbing member 225 and the magnetic shielding member 226, reference may be made to the arrangement of the first magnet 223 and the second magnet 224, which will not be described herein.

The wave absorbing member 225 may be made of SPCC (typically, cold rolled carbon steel sheet or strip), magnetic film, etc., and the wave absorbing member 225 changes the distribution direction of magnetic force lines, thereby changing the influence on the magnetically sensitive region C. The material of the magnetic separator 226 may be a low magnetic conductive material such as a silicon steel sheet or permalloy.

Referring to fig. 6 and 7 again, the electronic device 100 is provided with a traction member 50, where the traction member 50 is disposed at an end of the second housing 14 away from the first housing 12, and during the process of switching the second housing 14 from the first position to the second position relative to the first housing 12, the traction member 50 can draw the flexible screen 21 to deform so that a portion of the flexible screen 21 that is deployed on the second housing 14 is flat. When the second housing 14 is in the first position, the free portion 214 of the flexible screen 21 bypasses the traction member 50, and the traction member 50 can limit the bending radius of the flexible screen 21 within a proper range, so as to avoid damage to the flexible screen 21 caused by too small bending radius. Of course, the traction member 50 can also avoid the excessive thickness of the electronic device 100 caused by the excessive bending radius of the flexible screen 21.

In some embodiments, the traction member 50 may be a rotating shaft structure with convex teeth, and the flexible screen 21 is coupled with the traction member 50 by engagement or the like. When the second housing 14 slides relative to the first housing 12, the traction member 50 moves the portion of the flexible screen 21 engaged with the traction member 50 and is extended from the housing assembly 10 or retracted into the housing assembly 10.

It should be noted that, in the embodiment where the shape of the magnet 211 is a strip, the transmission assembly meshed with the convex teeth of the traction member 50 may be formed by using the magnets 211 arranged at intervals, so that the magnet 211 not only can meet the adsorption requirement of the magnetic attraction assembly, but also can adapt to the requirement of meshing and linkage between the traction member 50 and the flexible screen 21, thereby improving the flatness of the flexible screen 21 and reducing the number of structural members, and being beneficial to the thinning of the electronic device 100.

In other embodiments, the traction members 50 are circular shafts without accompanying teeth. During the switching of the second housing 14 from the first position to the second position, the portion of the flexible screen 21 attached to the traction member 50 is stretched by the traction member 50 so that more of the flexible screen 21 is exposed to the outside of the housing assembly 10 and is in the flat position. In this embodiment, the traction member 50 may be rotatably disposed on the second housing 14, and the traction member 50 may rotate along with the movement of the flexible screen 21 during the gradual deployment of the flexible screen 21, so as to reduce the resistance of the flexible screen 21 during the deployment and reduce the abrasion of the contact portion between the traction member 50 and the flexible screen 21.

In some embodiments, the traction member 50 may also be fixed to the second housing 14, the traction member 50 having a smooth surface. The traction member 50 is slidably contacted with the flexible screen 21 through a smooth surface thereof during the process of expanding the flexible screen 21 to the second housing 14. In other words, in such an embodiment, the pulling member 50 may be integrally formed with the second housing 14 or welded, and the pulling member 50 may be considered as a part of the second housing 14, and the free portion 214 of the flexible screen 21 bypasses the end of the second housing 14 remote from the first housing 12 and protrudes into the housing assembly 10.

During the process of switching the second housing 14 from the first position to the second position, the flexible screen 21 may be extended from the second housing 14 or retracted into the housing assembly 10 under the driving of the traction member 50. It can be appreciated that a plurality of intermediate positions may be further disposed between the first position and the second position, so as to position the second housing 14 relative to the first housing 12 at the plurality of intermediate positions, and enable the flexible screen 21 to have different display areas 21a at different intermediate positions, thereby expanding the usage scenario of the electronic device 100.

The relative movement of the first housing 12 and the second housing 14 of the electronic device 100 may be accomplished manually or electronically.

For example, when the first housing 12 and the second housing 14 are manually held by a user, the second housing 14 may be placed in the second position when the user moves in a direction away from each other. Accordingly, when the second housing 14 is in the second position, the electronic device 100 may be folded if necessary, and only the first housing 12 and the second housing 14 may be moved in a direction approaching each other.

As shown in connection with fig. 2 and 4, a drive mechanism 60 may be provided within the housing assembly 10 of the electronic device 100 when electronically controlled. Specifically, the driving mechanism 60 is disposed in the accommodating cavity 10a of the housing assembly 10, and is used for driving the first housing 12 and the second housing 14 to relatively move, so that the second housing 14 drives the flexible screen 21 to be unfolded from the housing assembly 10 or to be retracted into the housing assembly 10.

In some embodiments, the first housing 12 and the second housing 14 are connected to the driving mechanism 60 and move relatively under the driving of the driving mechanism 60. Specifically, the driving mechanism 60 has a fixed portion 212 and a movable portion that is movable relative to the fixed portion 212 when the driving mechanism 60 is operated. The fixed portion 212 is connected to the first housing 12, and the movable portion is connected to the second housing 14 and is configured to move the second housing 14 relative to the first housing 12.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims

1. A flexible display device, comprising:

2. The flexible display device of claim 1, wherein the magnet comprises a plurality of magnetic support bars, the plurality of magnetic support bars are arranged at intervals along the first direction, and a length direction of each magnetic support bar is perpendicular to the first direction;

and/or the magnet comprises a magnetic rubber sheet, and the magnetic rubber sheet is attached to one side of the flexible screen, which is opposite to the display surface, and can be bent along with the free part.

3. The flexible display device of claim 1, wherein the magnetic assembly comprises a plurality of first magnets and a plurality of second magnets, wherein the flexible display device has at least one magnetically sensitive region in a magnetic field environment of the magnetic assembly, wherein the magnetically sensitive region is fixed relative to the first support or the second support, wherein a north pole of the first magnet faces the display surface, wherein a south pole of the first magnet faces away from the display surface, wherein a south pole of the second magnet faces away from the display surface, and wherein a magnetic induction strength of the first magnet and the second magnet in the magnetically sensitive region is reduced relative to each other when the flexible display device is unfolded to a predetermined position.

4. A flexible display device according to claim 3, wherein the preset position is a fully extended position or a fully collapsed position of the flexible screen, or wherein the preset position is one of an intermediate position between the fully extended position and the fully collapsed position of the flexible screen.

5. A flexible display device as claimed in claim 3, comprising a magneto-sensitive element located in a magnetically sensitive region of the flexible display device when the flexible display device is deployed to the predetermined position, the magnetically induced strength of the magnetically attractive element in the magnetically sensitive region being less than or equal to a threshold value at which the magneto-sensitive element is capable of withstanding magnetic field disturbances.

6. The flexible display device according to claim 5, wherein the flexible display device is electrically connected to a controller, the controller is electrically connected to an electromagnetic coil, and the controller is configured to control the electromagnetic coil to generate a magnetic field opposite to the magnetic field of the magnetic attraction component according to the magnetic induction of the magnetic attraction component in the magnetic sensitive area detected by the magnetic sensitive element when the magnetic induction of the magnetic attraction component in the magnetic sensitive area is greater than a critical value where the magnetic field can withstand magnetic field interference.

7. A flexible display device according to claim 3, wherein the absolute value of the sum of the magnetic inductances of the plurality of first magnets in the magnetically sensitive area is equal to the absolute value of the sum of the magnetic inductances of the plurality of second magnets in the magnetically sensitive area.

8. The flexible display device according to claim 7, wherein the magnetic component further comprises a plurality of wave absorbing members, the wave absorbing members are disposed on one of the first magnets and the second magnets with stronger magnetic induction intensity to the magnetically sensitive area, and the wave absorbing members face to a side where the magnetically sensitive area is located;

And/or, the magnetic component further comprises a plurality of magnetism isolating pieces, the magnetism isolating pieces are arranged on one of the first magnets and the second magnets with stronger magnetic induction intensity to the magnetic sensitive area, and the magnetism isolating pieces face to one side where the magnetic sensitive area is located.

9. The flexible display device according to claim 7, wherein the plurality of first magnets and the plurality of second magnets are magnets of the same specification, and the number of the first magnets and the number of the second magnets are equal, and the first magnets and the second magnets are arranged symmetrically in pairs with a straight line passing through the magnetically sensitive area as a symmetry axis;

or in the first direction, the first magnets and the second magnets are alternately arranged on the second supporting piece, and in the direction perpendicular to the first direction, the first magnets and the second magnets are alternately arranged on the second supporting piece.

10. The flexible display device according to claim 7, wherein e first magnets form a first magnetic attraction unit, f second magnets form a second magnetic attraction unit, e, f are natural numbers, e is greater than f, and an absolute value of magnetic induction intensity of the first magnetic attraction unit in the magnetic sensitive area is equal to an absolute value of magnetic induction intensity of the second magnetic attraction unit in the magnetic sensitive area;

And/or m first magnets form a third magnetic attraction unit, n second magnets form a fourth magnetic attraction unit, m and n are natural numbers, m is smaller than n, and the absolute value of the magnetic induction intensity of the third magnetic attraction unit in the magnetic sensitive area is equal to the absolute value of the magnetic induction intensity of the fourth magnetic attraction unit in the magnetic sensitive area.

11. The flexible display device according to claim 10, wherein at least 1 of the first magnets and at least 1 of the second magnets are identical in size and symmetrically arranged in pairs with a straight line passing through the magnetically sensitive region as an axis of symmetry.

12. A flexible display device according to claim 1, wherein the flexible screen comprises 2 free portions, the 2 free portions being connected to both ends of the fixed portion, respectively, the first support member being provided with the second support members on opposite sides in the first direction, one of the second support members being for supporting one of the free portions of the flexible screen, and the other of the second support members being for supporting the other of the free portions of the flexible screen.

13. The flexible display device of claim 1, wherein one of the first support member and the second support member is provided with a plurality of slots, a plurality of the slots each extend along a first direction and are arranged in parallel with each other along a second direction, the second direction is perpendicular to the first direction, the other of the first support member and the second support member comprises a spine strip and a plurality of skeletons connected with the spine strip, the skeletons are arranged in a comb-like manner, and the skeletons are movably inserted into the slots.

14. The flexible display device of claim 13, wherein the second support member defines a mounting slot, the magnetic assembly being mounted in the mounting slot;

alternatively, the second support is provided with a magnetizing portion for magnetizing to form the magnetic attraction assembly.

15. An electronic device comprising a housing assembly and a flexible display device as claimed in any one of claims 1 to 14, wherein the housing assembly is connected to the stretching mechanism and a portion of the flexible screen is configured to be stretched out of or into the housing assembly in response to relative movement of the first support and the second support.