CN111710248A

CN111710248A - Display device

Info

Publication number: CN111710248A
Application number: CN202010737092.7A
Authority: CN
Inventors: 董栗明; 李钊
Original assignee: BOE Technology Group Co Ltd
Current assignee: BOE Technology Group Co Ltd
Priority date: 2020-07-28
Filing date: 2020-07-28
Publication date: 2020-09-25

Abstract

The embodiment of the invention provides a display device, which relates to the technical field of display and can solve the problem that the area of a display area, which is expanded out of a scroll, of a flexible display panel is not supported; at least one part of the second support plate is embedded in the first support plate and is connected with the first support plate in a sliding mode along the first direction; the scroll is arranged on one side of the support plate along the second direction; the winding shaft comprises a winding drum and a shaft core nested in the winding drum, and the winding drum rotates around the shaft core; one part of the winding drum is connected with one end of the second support plate far away from the first support plate in a sliding way; the second direction is perpendicular to the first direction; the elastic element is positioned on the back surface of the first supporting plate and is used for generating elastic deformation under the action of external force; the flexible display panel is positioned on the supporting surface of the first supporting plate, is connected with the first supporting plate, covers the reel and is connected with the elastic element; the support surface is arranged opposite to the back surface.

Description

Display device

Technical Field

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

Background

The flexible display panel has the advantages of small volume, portability, capability of being bent and folded, and the like, so that the flexible display panel becomes the mainstream development trend of the current display panel, and along with the improvement of the flexible display technology, the flexible display panel capable of being rolled becomes an important direction for the development of future display device products.

At present, a device capable of expanding the display area of the flexible display panel is successively introduced in the market, and the device realizes that the area of the display area of the flexible display panel can be randomly adjusted by a user according to the needs of the user. In the extended display state, the flexible display panel partially accommodated in the display device is drawn out to increase the area of the display region of the entire flexible display panel. However, after the flexible display panel is drawn out, the surface of one side of the drawn flexible display panel, which deviates from the light-emitting side, is not well supported, so that the flexible display panel is easily damaged when a user uses the flexible display panel, the problem of poor display is caused, and the user experience in the using process is poor.

Disclosure of Invention

The embodiment of the application provides a display device, which can solve the problem that the area of a display area, which is expanded to the outside of a scroll, of a flexible display panel is not supported.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

in one aspect, a display device is provided, which includes: the supporting plate at least comprises a first supporting plate and a second supporting plate; at least one part of the second support plate is embedded in the first support plate and is in sliding connection with the first support plate along a first direction; the scroll is arranged on one side of the supporting plate along a second direction; the winding shaft comprises a winding drum and a shaft core nested in the winding drum, and the winding drum rotates around the shaft core; one part of the winding drum is connected with one end of the second support plate far away from the first support plate in a sliding mode; the second direction is perpendicular to the first direction; the elastic element is positioned on the back surface of the first supporting plate and is used for generating elastic deformation under the action of external force; the flexible display panel is positioned on the supporting surface of the first supporting plate, is connected with the first supporting plate, covers the reel and is connected with the elastic element; the support surface is arranged opposite to the back surface.

In some embodiments, the first support plate includes a first side wall and a second side wall opposite to the first side wall, the first side wall is provided with at least one first limiting hole, and the second side wall is provided with at least one second limiting hole; a vertical projection of a first limiting hole on the second side wall is overlapped with a second limiting hole; the first side wall and the second side wall are parallel to the first direction; the display device also comprises a limiting rod, and the limiting rod is connected with one end, far away from the scroll, of the second support plate; along the second direction, the first end of gag lever post is used for with first spacing hole cooperatees, the second end of gag lever post is used for with the spacing hole of second cooperatees to inject the displacement of second backup pad.

In some embodiments, the first sidewall has a first hole, the first hole extends through the first sidewall, the second sidewall has a second hole, and the second hole extends through the second sidewall; the second supporting plate comprises a third side wall and a fourth side wall which are opposite, the third side wall is provided with a first through hole, and the fourth side wall is provided with a second through hole; the vertical projection of the first through hole on the first side wall is overlapped with at least one part of the first limiting hole; the vertical projection of the second through hole on the second side wall is overlapped with at least one part of the second limiting hole; the first end of the limiting rod is located in the first limiting hole and the first through hole and is in clearance fit with the first limiting hole and the first through hole, and the second end of the limiting rod is located in the second limiting hole and the second through hole and is in clearance fit with the second limiting hole and the second through hole.

In some embodiments, the display device further comprises: the shell is positioned on the back surface of the first supporting plate; the shell is connected with the first supporting plate in a sliding mode, and an accommodating cavity is formed between the shell and the first supporting plate; the accommodating cavity is used for accommodating the elastic element, the scroll and at least one part of the flexible display panel.

In some embodiments, the display device further comprises: a support member positioned between the first support plate and the housing; the supporting part is parallel to the back surface of the first supporting plate, and one side of the supporting part close to the first supporting plate is connected with the first supporting plate; one side of the supporting component close to the shell is connected with the shell in a sliding mode.

In some embodiments, both ends of the shaft core are connected with the housing.

In some embodiments, the display device further comprises: the connecting part is used for connecting a part of the reel with one end of the second support plate far away from the first support plate in a sliding way; flanges are arranged at two ends of the winding drum, and the flexible display panel is positioned in the flanges; the outer side wall of the flange is provided with a groove arranged along the circumferential direction of the winding drum; the connecting part comprises a first connecting rod, a second connecting rod and a third connecting rod; the first end of the first connecting rod is connected with one end of the second connecting rod, and the other end of the second connecting rod is connected with the second supporting plate; the second end of the first connecting rod is connected with one end of the third connecting rod, and the other end of the third connecting rod is located in the groove and matched with the groove.

In some embodiments, the display device further comprises: the connecting part is used for connecting a part of the reel with one end of the second support plate far away from the first support plate in a sliding way; the connecting part comprises a first connecting rod, a second connecting rod and a third connecting rod; the first end of the first connecting rod is connected with one end of the second connecting rod, and the other end of the second connecting rod is connected with the second supporting plate; the second end of the first connecting rod is connected with one end of the third connecting rod, and the other end of the third connecting rod is connected with the shaft core.

In some embodiments, the surface of the first support plate contacting the winding drum is a circular arc surface, and the surface of the second support plate connecting the winding drum is a circular arc surface; the curvature of the arc surface is the same as that of the surface of the winding drum; in the area of the arc surface, the thicknesses of the supporting surfaces of the first supporting plate and the second supporting plate are sequentially reduced along the first direction.

In some embodiments, the display device further comprises: the positioning piece is connected with the surface of one side of the flexible display panel, which is far away from the light emergent surface; the electromagnet is connected with the supporting surface of the second supporting plate; the positioning piece is used for attracting magnetic force generated by the electromagnet.

Embodiments of the present invention provide a display device, when the area of the display area of a flexible display panel needs to be increased, the shaft core is pulled to translate towards the first direction under the action of external force, at the moment, the shaft core drives the winding drum to move along the first direction (namely, the scroll translates), and because the flexible display panel is positioned on the supporting surface of the first supporting plate and is connected with the first supporting plate, and covers on the scroll, and is connected with the elastic element, the elastic element can generate elastic deformation under the action of external force, so that the flexible display panel positioned on the back of the first supporting plate can also translate towards the first direction, in the process of moving the flexible display panel, the flexible display panel generates friction force with the surface of the winding drum, the winding drum is enabled to rotate around the winding drum core, in other words, the winding drum has translation and rotation in the movement process, and therefore the flexible display panel is unfolded out of the winding drum; on this basis, because the one end sliding connection that first backup pad was kept away from to a part of reel and second backup pad, that is to say, at the reel around the pivoted in-process of axle core, the second backup pad can not rotate along with the rotation of reel, in the in-process that the spool took place the translation, the reel can drive the second backup pad along first direction translation, and the second backup pad along first direction and first backup pad sliding connection, the second backup pad can be taken out from first backup pad along first direction promptly, thereby make the second backup pad play the supporting role to the regional area of flexible display panel display that increases, and then avoided the user to easily take place to damage in the use flexible display panel, lead to the problem that the user used the sense of touch poor.

In addition, when the display device provided by the embodiment of the invention is utilized, the first support plate and the second support plate can support the flexible display panel no matter in the initial state or in the expanded state, and provide better support force for the flexible display panel, so that a metal support plate does not need to be arranged in the flexible display panel, the thickness of the flexible display panel can be reduced, the problem that the functional layer is damaged due to the fact that the functional layer is strained by the tensile force of the functional layer of the flexible display panel is reduced, and the use reliability of the flexible display panel is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of another display device according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a liquid crystal flexible display panel according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an electroluminescent flexible display panel according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of another display device according to an embodiment of the present invention;

FIG. 6a is a schematic structural diagram of a display device according to the related art;

FIG. 6b is a schematic structural diagram of another display device provided in the related art;

fig. 7 is a schematic structural diagram of a first support plate according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a supporting plate according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a first supporting plate according to another embodiment of the present invention;

fig. 10 is a schematic structural diagram of a second supporting plate according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of another display device according to an embodiment of the invention;

FIG. 12 is a schematic cross-sectional view in the direction AA' of FIG. 11;

FIG. 13 is an enlarged view of portion C of FIG. 11;

fig. 14 is a schematic structural diagram of a connecting member according to an embodiment of the present invention;

fig. 15 is a schematic structural diagram of another display device according to an embodiment of the invention;

fig. 16 is a schematic structural diagram of a flexible display panel and a second supporting plate according to an embodiment of the present invention;

fig. 17 is a schematic structural diagram of another display device according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the following, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

Further, in this application, directional terms such as "upper," "lower," "left," "right," and the like may be used in a generic and descriptive sense only and not for purposes of limitation, with respect to the orientation of components in the figures, but also with respect to the orientation of components in the figures.

In the present application, unless expressly stated or limited otherwise, the term "coupled" is to be construed broadly, e.g., "coupled" may be a fixed connection, a removable connection, or an integral part; may be directly connected or indirectly connected through an intermediate.

The embodiment of the invention provides a display device which can be a product or a component with any display function, such as a display, a television, a digital camera, a mobile phone, a tablet personal computer, an electronic photo frame and the like.

The Display device provided in the embodiment of the present invention may be a Liquid Crystal Display (LCD), an electroluminescent Display, or other types of Display devices. In the case that the display device is an electroluminescent display device, the electroluminescent display device may be an organic light-Emitting display device (OLED) or a Quantum Dot electroluminescent display device (QLED). Electroluminescent display devices are easier to fabricate as flexible display devices than liquid crystal display devices.

As shown in fig. 1 and 2, the display device includes a support plate 1, a reel 2, a flexible display panel 3, and an elastic member 4.

In the case where the display device is a liquid crystal display device, the flexible display panel 3 is a liquid crystal display panel. As shown in fig. 3, the main structure of the liquid crystal display panel includes an array substrate 31, a pair of cell substrates 32, and a liquid crystal layer 33 disposed between the array substrate 31 and the pair of cell substrates 32.

Each sub-pixel P of the array substrate 31 includes a thin film transistor 311 and a pixel electrode 312 on the first base 310. In some embodiments, the array substrate 31 further includes a common electrode 313 disposed on the first base 310. The pixel electrode 312 and the common electrode 313 may be disposed at the same layer, in which case the pixel electrode 312 and the common electrode 313 each include a comb-tooth structure of a plurality of strip-shaped sub-electrodes. The pixel electrode 312 and the common electrode 313 may also be disposed at different layers, in which case, as shown in fig. 3, the first insulating layer 314 is disposed between the pixel electrode 312 and the common electrode 313. In the case where the common electrode 313 is provided between the thin film transistor 311 and the pixel electrode 312, as shown in fig. 3, a second insulating layer 315 is further provided between the common electrode 313 and the thin film transistor 311. In other embodiments, the pair of cell substrates 32 includes a common electrode 313. As shown in fig. 3, the array substrate 31 further includes a planarization layer 316 disposed on a side of the thin film transistor 311 and the pixel electrode 312 away from the first substrate 310.

As shown in fig. 3, the opposing substrate 32 includes a Color filter layer 321 disposed on the second substrate 320, in which case, the opposing substrate 32 may also be referred to as a Color Filter (CF). The color filter layer 321 includes at least one of a red photoresist unit, a green photoresist unit, and a blue photoresist unit disposed in each sub-pixel P. The opposite-box substrate 32 further includes a black matrix 322 disposed on the second substrate 320, the black matrix 322 being used to space the red, green, and blue photo-resist units apart.

The liquid crystal display panel further includes an upper polarizer 34 disposed on the side of the opposing-to-cell substrate 32 away from the liquid crystal layer 33 and a lower polarizer 35 disposed on the side of the array substrate 31 away from the liquid crystal layer 33.

In the case where the display device is an electroluminescence display device, the flexible display panel 3 is an electroluminescence display panel. As shown in fig. 4, the electroluminescent display panel includes a display substrate 36 and an encapsulating layer 37 for encapsulating the display substrate 36. Here, the encapsulation layer 37 may be an encapsulation film or an encapsulation substrate. In some embodiments, the electroluminescent display panel further comprises a color filter layer 321 disposed on the encapsulation layer 37.

As shown in fig. 4, each of the sub-pixels P of the display substrate 36 includes a plurality of light emitting devices arranged in an array on a third substrate 360, and a driving circuit on the third substrate 360, wherein the driving circuit includes a plurality of thin film transistors 311. The light-emitting device includes an anode 361, a light-emitting functional layer 362, and a cathode 363. The display substrate 36 further includes a pixel defining layer 364, the pixel defining layer 364 includes a plurality of openings, and one light emitting device is provided in one opening. In some embodiments, the light emitting functional layer 362 comprises a light emitting layer. In other embodiments, the light emitting function layer 362 includes one or more of an Electron Transport Layer (ETL), an Electron Injection Layer (EIL), a Hole Transport Layer (HTL), and a Hole Injection Layer (HIL), in addition to the light emitting layer.

As shown in fig. 4, the display substrate 36 further includes a planarization layer 365 disposed between the driving circuit and the anode 361.

Wherein, the supporting plate 1 at least comprises a first supporting plate 11 and a second supporting plate 12; at least a portion of the second support plate 12 is embedded in the first support plate 11 and slidably connected with the first support plate 11 along the first direction X.

The material of the first support plate 11 and the one second support plate 12 is not limited. For example, the material of the first support plate 11 and the one second support plate 12 may be a metal material, and the metal material may be, for example, elemental metal such as copper (Cu), silver (Ag), aluminum (Al), or a metal alloy, or other suitable material.

It is considered that if the thicknesses of the first support plate 11 and the second support plate 12 are too thin, insufficient supporting force of the first support plate 11 and the second support plate 12 to the flexible display panel 3 may be caused; if the thicknesses of the first and

second support plates

11 and 12 are too thick, the thickness of the entire display device may be increased, making the user experience poor. Based on this, in some embodiments, the thickness of the first and

second support plates

11 and 12 ranges from 3mm to 5 mm.

Illustratively, the thicknesses of the first support plate 11 and the second support plate 12 may be 3mm, 4mm, and 5 mm.

The first direction X is a direction in which the second support plate 12 is drawn out from the first support plate 11.

As shown in fig. 1, the display device is in an initial state. In the initial state, in some embodiments, the second support plate 12 is fully embedded within the first support plate 11. In other embodiments, the second support plate 12 is not completely embedded within the first support plate 11, i.e. the second support plate 12 has a protrusion relative to the edge of the first support plate 11 in the initial state. Fig. 1 illustrates an example in which the second support plate 12 is completely embedded in the first support plate 11.

Note that, when a product is sold, the display device is normally in an initial state.

As shown in fig. 2, the display device is in an expanded state. The expanded state is a state when the second support plate 12 is pulled out from the first support plate 11. At this time, in order to ensure that the second support plate 12 does not come off from the first support plate 11, a part of the second support plate 12 is still embedded in the first support plate 11 after the second support plate 12 is drawn out from the first support plate 11.

Referring again to fig. 1 and 2, the winding shaft 2 is disposed at one side of the support plate 1 in the second direction Y; the reel 2 comprises a reel 21 and a shaft core 20 nested in the reel 21, and the reel 21 rotates around the shaft core 20; a portion of the reel 21 is slidably connected to an end of the second support plate 12 away from the first support plate 11, and the second direction Y is perpendicular to the first direction X.

It should be understood by those skilled in the art that, when the winding shaft 2 is disposed at one side of the support plate 1 in the second direction Y, the winding shaft 2 may be disposed at both ends (e.g., left and right ends) of the support plate 1 since the second direction Y is perpendicular to the first direction X; fig. 1 and 2 are each illustrated with a reel 2 provided at the right end of a support plate 1 as an example.

On this basis, in the case where the reel 2 is disposed at the right end of the support plate 1, the first direction X is horizontally rightward; in the case where the reel 2 is disposed at the left end of the support plate 1, the first direction X is horizontally leftward.

Referring again to fig. 1 and 2, the elastic member 4 is located at the back of the first support plate 11 for being elastically deformed by an external force.

Here, the spring direction F of the spring element 4 is opposite to the first direction X. For example, when the first direction X is horizontal to the right, the elastic direction F is horizontal to the left; when the first direction X is horizontal to the left, the elastic direction is horizontal to the right.

Because one end of the elastic element 4 is fixed and the other end is connected with the flexible display panel 3, when the flexible display panel 3 is unfolded out of the scroll 2 in the expansion display state, the elastic element 4 is elastically deformed, and the elastic direction F of the elastic element 4 is opposite to the first direction X, so that the flexible display panel 3 can be tightly attached to the scroll 2.

In some embodiments, the elastic element 4 may be a torsion spring, which is elastically deformed by an external force, but the elastic force of the torsion spring does not change. In other embodiments, the elastic element 4 is a spring, and the spring is elastically deformed by an external force, and the magnitude of the elastic force is also changed. Illustratively, the greater the amount of elastic deformation of the spring, the greater the spring force.

Based on the above, since the elasticity of the torsion spring is not changed after the torsion spring is elastically deformed, the extra elasticity is not added to stretch the flexible display panel 3, and the problem that the flexible display panel 3 is damaged under the action of strong external force is reduced, and based on this, in some embodiments, the elastic element 4 is a torsion spring.

Referring again to fig. 1 and 2, the flexible display panel 3 is positioned on the supporting surface of the first supporting plate 11, is connected with the first supporting plate 11, covers the reel 2, and is connected with the elastic element 4; wherein the support surface is arranged opposite to the back surface.

The connection mode of the flexible display panel 3 and the first support plate 11 is not limited. In some embodiments, the support surfaces of the flexible display panel 3 and the first support plate 11 may be adhered together with glue. In other embodiments, the flexible display panel 3 and the supporting surface of the first supporting plate 11 may be fixedly connected together by a screw thread or the like. The thread may be, for example, one of a bolt, screw or stud.

As shown in fig. 2, when a portion of the flexible display panel 3 is positioned on the supporting surface of the first support plate 11 and another portion is wound on the reel 2 and positioned on the back surface of the first support plate 11 around the reel 2, the flexible display panel 3 positioned on the supporting surface of the first support plate 11 may be referred to as a fixed display panel; the flexible display panel 3 wound on the reel 2 and positioned at the back of the first support plate 11 around the reel 2 may be called an extended display panel, and as the name implies, a fixed display panel is a display area where the display device is fixed when sold; when a user needs to increase the display area of the flexible display panel 3, another part of the flexible display panel 3 is unwound from the reel 2, so that the area of the display area of the whole flexible display panel 3 can be increased.

In general, when the flexible display panel 3 is wound around the roll 2, the minimum radius R of the roll 2 that can be received by the functional layers of the flexible display panel 3 is 5mm, and therefore, when the flexible display panel 3 is wound around the roll 2 having a radius of less than 5mm, the functional layers in the bent region of the flexible display panel 3 are likely to be damaged. In the embodiment of the present invention, another portion of the flexible display panel 3 is connected to the elastic element 4 after covering the reel 2, and the flexible display panel 3 connected to the elastic element 4 is located on the back side of the first support plate 11, so that compared with the case that the flexible display panel 3 is completely wound on the reel 2, the problem that the functional layer is damaged due to the small radius of the reel 2 in the bending area of the flexible display panel 3 can be reduced.

In some embodiments, as shown in fig. 5, the support plate 1 may further comprise two first support plates 11 and two second support plates 12. Referring to fig. 5, the support plate located at the center is denoted by reference numeral "200", the support plate located at the left side is denoted by reference numeral "100", and the support plate located at the right side is denoted by reference numeral "300". Illustratively, the support plate 100 is a first support plate 11 with respect to the support plate 200; the support plate 200 is a second support plate 12 with respect to the support plate 100; accordingly, the support plate 200 is the first support plate 11 with respect to the support plate 300; the support plate 300 is the second support plate 12 with respect to the support plate 200. Thus, when the flexible display panel 3 is long, the support plates can be completely drawn out in sections, so that the three support plates can provide support force for the flexible display panel 3.

Related art provides a display device, as shown in fig. 6a and fig. 6b, fig. 6a is a schematic diagram of an initial state of the display device, and fig. 6b is a schematic diagram of the flexible display panel 3 being unwound out of the reel 2. The display device comprises a flexible display panel 3, a support plate 1, a reel 2 and an elastic element 4. In fig. 6a, a fixed display area B1 of the flexible display panel 3 is shown within the dashed line frame, and the support plate 1 supports the flexible display panel 3 within the fixed display area B1. As shown in fig. 6b, in the expanded state, the scroll 2 moves horizontally (moves rightwards), the elastic element 4 is elastically deformed under the action of external force, so that the flexible display panel 3 translates rightwards, and on the basis, the scroll 2 rotates due to the friction between the scroll 2 and the flexible display panel 3, so that the flexible display panel 3 can be unfolded to the outside of the scroll 2, a larger display area is provided for a user, and the area of the display area can be flexibly adjusted according to the user's requirements. However, as shown in fig. 6B, the dashed line is shown as an extended display area B2 of the flexible display panel 3, and as can be seen from fig. 6B, the bottom of the flexible display panel 3 in the extended display area B2 is not supported, and as the area of the flexible display panel 3 extending out of the scroll 2 is larger, the area without support is also larger, the flexible display panel 3 in the area without support is easily damaged during use, and the user feels bad.

In addition, in the related art, in order to support the bottom of the flexible display panel 3, a metal supporting sheet may be added to the flexible display panel 3, for example, the metal supporting sheet is disposed on a side of the flexible display panel 3 away from the display surface (i.e., a back side of the flexible display panel 3), a thickness of the metal supporting sheet ranges from 0.3mm to 0.5mm, and the metal supporting sheet may be wound on the reel 2 along with the flexible display panel 3, so that the flexible display panel 3 is thicker, a strain of a functional layer of the flexible display panel 3 may increase in a wound area, and the functional layer may fail, and the flexible display panel 3 may have a problem of poor display.

Based on the above, with the display device provided by the embodiment of the present invention, when the area of the display area of the flexible display panel 3 needs to be increased, the core 20 is pulled by an external force to translate toward the first direction X, at this time, the core 20 drives the drum 21 to move along the first direction X (i.e. the drum 2 translates), and since the flexible display panel 3 is located on the supporting surface of the first supporting plate 11, connected to the first supporting plate 11, covered on the drum 6, and connected to the elastic element 7, the elastic element 4 can elastically deform under the external force, so that the flexible display panel 3 located on the back of the first supporting plate 11 also translates toward the first direction X, during the movement of the flexible display panel 3, the flexible display panel 3 and the surface of the drum 21 generate a friction force, so that the drum 21 rotates around the core 20 in a translation manner, in other words, the drum 2 rotates during the movement as well as the movement, thereby causing the flexible display panel 3 to unwind out of the roll 2; on this basis, because a part of the winding drum 21 is slidably connected to one end of the second support plate 12 away from the first support plate 11, that is, in the process that the winding drum 21 rotates around the shaft core 20, the second support plate 12 cannot rotate along with the rotation of the winding drum 21, and in the process that the winding drum 2 translates, the winding drum 21 can drive the second support plate 12 to translate along the first direction X, and the second support plate 12 is slidably connected to the first support plate 11 along the first direction X, that is, the second support plate 12 can be drawn out from the first support plate 11 along the first direction X, so that the second support plate 12 can support the increased area of the display area of the flexible display panel 3, and further, the problem that the flexible display panel 3 is easily damaged in the use process of a user and the user feels poor is avoided.

Moreover, when the display device provided by the embodiment of the invention is utilized, no matter in an initial state or in an expanded state, the first support plate 11 and the second support plate 12 can both support the flexible display panel 3 and provide a better support force for the flexible display panel 3, so that a metal support sheet does not need to be separately arranged in the flexible display panel 3, the thickness of the flexible display panel 3 can be reduced, the problem that the functional layer is damaged due to the strain of the functional layer of the flexible display panel 3 caused by the tensile force is reduced, and the reliability of the use of the flexible display panel 3 is improved.

In some embodiments, as shown in fig. 7, the first support plate 11 includes a first side wall 111 and a second side wall 112 disposed opposite to each other, the first side wall 111 has at least one first limiting hole 1110, and the second side wall 112 has at least one second limiting hole 1120; a perpendicular projection of a first hole 1110 on the second sidewall 112 overlaps a second hole 1120; the first and

second sidewalls

111 and 112 are parallel to the first direction X;

here, "at least one" may be only one; the number of the first limiting holes 1110 and the number of the second limiting holes 1120 are not limited in the embodiment of the present invention, and may be reasonably designed according to the need.

In addition, a vertical projection of one first limiting hole 1110 on the second sidewall 112 overlaps one second limiting hole 1120, that is, the number of the first limiting holes 1110 on the first sidewall 111 is the same as the number of the second limiting holes 1120 on the second sidewall 112, and the first limiting holes 1110 and the second limiting holes 1120 are in one-to-one correspondence.

It should be noted that, the first sidewall 111 and the second sidewall 112 are parallel to the first direction X, and the included angle between the first sidewall 111 and the first direction X is not exactly 180 °, and when there is an error in the included angle between the first sidewall 111 and the first direction X and the error in the included angle is within the tolerance range, the embodiments of the present invention are all within the protection scope.

On the basis, referring to fig. 5 and 8, the display device further comprises a limiting rod 5, wherein the limiting rod 5 is connected with one end of the second support plate 12 far away from the reel 2; along the second direction Y, the first end of the limiting rod 5 is used for being matched with the first limiting hole 1110, and the second end of the limiting rod 5 is used for being matched with the second limiting hole 1120 to limit the displacement of the second supporting plate 12.

Optionally, the first limiting hole 1110 and the second limiting hole 1120 are grooves, and the first limiting hole 1110 is recessed in the first sidewall 111 from a surface of the first sidewall 111 close to the second sidewall 112 to a surface of the first sidewall 111 away from the second sidewall 112. The second limiting hole 1120 is recessed from a surface of the second sidewall 112 close to the first sidewall 111 to a surface of the second sidewall 112 away from the first sidewall 111 in the second sidewall 112. Design like this, when second backup pad 12 slides in first backup pad 11, because first spacing hole 1110 and the spacing hole 1120 of second are the recess, consequently gag lever post 5 can be moved to another recess by a recess under the effect of external force, and when not having the exogenic action, the both ends card of gag lever post 5 is in the recess to inject the displacement of second backup pad 12.

Optionally, as shown in fig. 7 and 8, a plurality of first limiting holes 1110 are formed on the first sidewall 111, a plurality of second limiting holes 1120 are formed on the second sidewall 112, and one first limiting hole 1110 is communicated with one second limiting hole 1120, that is, the first limiting hole 1110 and the second limiting hole 1120 are through holes, in some embodiments, the limiting rod 5 may be an expansion rod.

Illustratively, when the second support plate 12 slides within the first support plate 11, the stop rod 5 retracts into the second support plate 12; when the second support plate 12 stops sliding in the first support plate 11, the limiting rod 5 extends out, and the first end passes through the first limiting hole 1110 and the second end passes through the second limiting hole 1120, so as to limit the displacement of the second support plate 12.

On this basis, the display device further comprises a processor and a first control part, wherein the first control part is respectively electrically connected with the processor and the limiting rod 5. The processor is used for detecting whether the second supporting plate 12 reaches a preset position, if the second supporting plate reaches the preset position, the processor sends a detection result to the first control part, and the first control part controls the limiting rod 5 to extend out, so that the movement of the second supporting plate 12 can be limited.

In some embodiments, as shown in fig. 9, 10, 11, and 12, fig. 12 is a schematic cross-sectional view of fig. 11 in the direction AA'. A first limiting hole 1110 is formed in the first sidewall 111, and the first limiting hole 1110 penetrates through the first sidewall 111; a second limiting hole 1120 is formed in the second sidewall 112, and the second limiting hole 1120 penetrates through the second sidewall 112; the second supporting plate 12 includes a third side wall 121 and a fourth side wall 122 opposite to each other, the third side wall 121 is provided with a first through hole 1210, and the fourth side wall 122 is provided with a second through hole 1220; the vertical projection of the first through hole 1210 on the first sidewall 111 overlaps at least a portion of the first hole 1110, and the vertical projection of the second through hole 1220 on the second sidewall 112 overlaps at least a portion of the second hole 1120; the first end of the limiting rod 5 is located in the first limiting hole 1110 and the first through hole 1210, and is in clearance fit with the first limiting hole 1110 and the first through hole 1210, and the second end of the limiting rod 5 is located in the second limiting hole 1120 and the second through hole 1220, and is in clearance fit with the second limiting hole 1120 and the second through hole 1220.

The shapes of the first stopper hole 1110 and the second stopper hole 1120 are not limited. For example, the first and second position-limiting

holes

1110 and 1120 may be rectangular in shape; alternatively, as shown in fig. 9, 10 and 11, the first and

second stopper holes

1110 and 1120 are shaped as a kidney-shaped hole (also referred to as a runway hole).

The shapes of the first and second through

holes

1210 and 1220 are not limited. For example, the first and second through

holes

1210 and 1220 may be rectangular in shape; alternatively, as shown in fig. 9, 10 and 11, the first and second through

holes

1210 and 1220 have a kidney shape. In addition, the shapes of the first and second limiting

holes

1110 and 1120 and the first and second through

holes

1210 and 1220 may be the same or different. Fig. 9, 10 and 11 in the embodiment of the present invention illustrate an example of the first and second limiting

holes

1110 and 1120 being waist-shaped holes, which are completely the same as the first and second through

holes

1210 and 1220.

Illustratively, in a case where a portion of the second support plate 12 is embedded in the first support plate 11, a perpendicular projection of the first through hole 1210 on the first sidewall 111 overlaps a portion of the first stopper hole 1110, and a perpendicular projection of the second through hole 1220 on the second sidewall 112 overlaps a portion of the second stopper hole 1120. In the case where the second support plate 12 is completely inserted into the first support plate 11, the perpendicular projection of the first through-hole 1210 on the first sidewall 111 completely overlaps the first stopper hole 1110, and the perpendicular projection of the second through-hole 1220 on the second sidewall 112 completely overlaps the second stopper hole 1120.

It should be noted that the term "clearance fit" refers to that the upper tolerance and the lower tolerance of the first end of the limiting rod 5 (e.g. the pin, or also called the positioning pin) and the first limiting hole 1110 and the first through hole 1210 satisfy a certain condition, and the upper tolerance and the lower tolerance of the second end of the limiting rod 5 and the second limiting hole 1120 and the second through hole 1220 satisfy a certain condition, at this time, under the action of an external force (e.g. the force of a finger of a user), the first end of the limiting rod 5 can slide in the first limiting hole 1110 and the first through hole 1210, the second end can slide in the second limiting hole 1120 and the second through hole 1220, some damping exists during the sliding process, and the limiting rod 5 can hover when the external force is lost, thereby playing a role of limiting the movement of the second support plate 12.

Illustratively, the difference between the upper tolerance and the lower tolerance of the stopper rod 5 is about 0.1 mm; the difference between the upper tolerance and the lower tolerance of the first hole 1110, the first through hole 1210, the second hole 1120, and the second through hole 1220 is about es-ei ═ 0.1 mm.

In the embodiment of the present invention, since the first end of the limiting rod 5 is located in the first limiting hole 1110 and the first through hole 1210, and is in clearance fit with the first limiting hole 1110 and the first through hole 1210, and the second end of the limiting rod 5 is located in the second limiting hole 1120 and the second through hole 1220, and is in clearance fit with the second limiting hole 1120 and the second through hole 1220, the displacement of the second supporting plate 12 can be limited only by the action of the external force, thereby facilitating the simplification of the structure of the display device.

In some embodiments, as shown in fig. 11, 13 and 14, fig. 13 is an enlarged schematic view of a portion C in fig. 11. The display device further comprises a connecting member 6 for slidably connecting a portion of the drum 21 to an end of the second support plate 12 remote from the first support plate 11; flanges 22 are provided at both ends of the roll 21, and the flexible display panel 3 is located inside the flanges 22; the outer side wall of the flange 22 is provided with a groove 23 arranged along the circumferential direction of the winding drum 21; the connecting member 6 includes a first connecting rod 60, a second connecting rod 61, and a third connecting rod 62; a first end a of the first connecting rod 60 is connected with one end of the second connecting rod 61, and the other end of the second connecting rod 61 is connected with the second support plate 12; the second end b of the first connecting rod 60 is connected to one end of a third connecting rod 62, and the other end of the third connecting rod 62 is located in the groove 23 and is matched with the groove 23.

Here, the connection mode between the specific structures of the connecting part 6 and the connection mode between the connecting part and the second support plate 12 can refer to the above-mentioned embodiments, and are not described in detail herein.

It should be noted that the other end of the third connecting rod 62 is located in the groove 23, and the cooperation with the groove 23 means that when the winding drum 21 rotates, the other end of the third connecting rod 62 moves relative to the winding drum 21, that is, when the winding drum 21 rotates, the groove 23 also rotates, and the other end of the third connecting rod 62 is stationary relative to the groove 23, so that the connecting part 6 does not move relative to the winding drum 21, and thus the connecting part 6 enables a part of the winding drum 21 to be slidably connected with one end of the second support plate 12 away from the first support plate 11.

In the embodiment of the present invention, flanges 22 are provided at both ends of the roll 21, and the flexible display panel 3 is located inside the flanges 22; the outer side wall of the flange 22 is provided with a groove 23 arranged along the circumferential direction of the winding drum 21, and the other end of the third connecting rod 62 is positioned in the groove 23 and matched with the groove 23; on one hand, when the flexible display panel 3 is located in the flange 22, the flexible display panel 3 can be prevented from sliding off the surface of the winding drum 21 in the moving process, and the probability of damage to the flexible display panel 3 is further reduced; on the other hand, the groove 23 on the outer side wall of the flange 22 allows the connecting part 6 to be slidably connected with the winding drum 21, and the connecting part 6 is connected with the second support plate 12, so that the sliding connection between the second support plate 12 and the winding drum 21 is realized, and the second support plate 12 is ensured not to rotate along with the rotation of the winding drum 21 when the winding drum 21 rotates.

In some embodiments, as shown in fig. 14 and 15, the display device further comprises a connecting member 6 for slidably connecting a portion of the reel 21 with an end of the second support plate 12 remote from the first support plate 11; the connecting member 6 includes a first connecting rod 60, a second connecting rod 61, and a third connecting rod 62; a first end a of the first connecting rod 60 is connected with one end of the second connecting rod 61, and the other end of the second connecting rod 61 is connected with the second support plate 12; the second end b of the first connecting rod 60 is connected to one end of a third connecting rod 62, and the other end of the third connecting rod 62 is connected to the shaft core 20.

Here, the connection mode between the specific structures of the connecting part 6, the connection mode between the connecting part and the second support plate 12, and the connection mode between the connecting part and the shaft core 20 may refer to the above-mentioned embodiments, and are not described in detail herein.

It should be noted that, since the winding drum 21 rotates around the shaft core 20, that is, the shaft core 20 does not rotate, and the other end of the second connecting rod 61 included in the connecting part 6 is connected to the second support plate 12, and the other end of the third connecting rod 62 is connected to the shaft core 20, when the winding drum 21 rotates, since the shaft core 20 is fixed, the second support plate 12 is fixed, that is, the sliding connection between the second support plate 12 and the winding drum 21 is realized.

Referring again to fig. 9 and 10, in some embodiments, the surface of the first support plate 11 in contact with the winding drum 21 is a circular arc, and the surface of the second support plate 12 in contact with the winding drum 21 is a circular arc; the curvature of the arc surface is the same as that of the surface of the winding drum; in the region D of the arc surface, the thicknesses of the support surfaces of the first support plate 11 and the second support plate 12 decrease in order along the first direction.

Note that, in the case where the second support plate 12 is completely embedded in the first support plate 11, the first support plate 11 is in contact with the roll 21. In addition, in the region D of the arc surface, the thicknesses of the supporting surfaces of the first supporting plate 11 and the second supporting plate 12 are sequentially reduced along the first direction, that is, in the region D of the arc surface, the supporting surfaces of the first supporting plate 11 and the second supporting plate 12 are a slope.

In the embodiment of the invention, because the surface of the first support plate 11 contacting with the winding drum 21 is an arc surface and the surface of the second support plate 12 contacting with the winding drum 21 is an arc surface, when the winding drum 21 rotates, the arc surfaces of the first support plate 11 and the second support plate 12 do not generate large resistance to the winding drum 21, so that the winding drum 21 can smoothly slide; on this basis, because in the region D of the arc surface, the thicknesses of the supporting surfaces of the first supporting plate 11 and the second supporting plate 12 are sequentially reduced along the first direction, when the flexible display panel 3 is located in the first supporting plate 11 and the second supporting plate 12, a smooth transition is provided at a position where the first supporting plate 11 is connected with the second supporting plate 12, and a smooth transition is provided at a position where the second supporting plate 12 is slidably connected with the winding drum 21, so that the problems that the flexible display panel 3 is damaged and the display effect is affected can be effectively avoided.

In some embodiments, as shown in fig. 16, the display device further includes a positioning element 7 and an electromagnet 8, where the positioning element 7 is connected to a side surface of the flexible display panel 3 facing away from the light exit surface; the electromagnet 8 is connected with the supporting surface of the second supporting plate 12, and the positioning piece 7 is used for attracting the magnetic force generated by the electromagnet 8.

Alternatively, the positioning member 7 may be a metal sheet or a magnet. In addition, the positioning member 7 may be provided in any region of the back surface of the flexible display panel 3. For example, in the middle area of the flexible display panel 3; or in the edge area of the flexible display panel 3. In case the positioning member 7 is arranged at the edge area of the flexible display panel 3, the electromagnet 8 is also arranged at the frame area on the supporting surface of the second supporting plate 12.

In some embodiments, referring to fig. 16, the positioning member 7 is a continuous elongated member. In other embodiments, the positioning member 7 is a plurality of block-shaped structures arranged at intervals. In addition, the electromagnets 8 are a plurality of block-shaped structures arranged at intervals. It should be noted that when the flexible display panel 3 is located on the supporting surface of the second supporting plate 12, the vertical projection of the positioning element 7 on the second supporting plate 12 overlaps the vertical projection of the electromagnet 8 on the second supporting plate 12.

It should be noted that, since the electromagnet 8 is connected to the supporting surface of the second supporting plate 12, the electromagnet 8 needs to have magnetic force when being energized, and therefore, the display device according to the embodiment of the present invention further includes a second control component, and the second control component is electrically connected to the electromagnet 8 and the processor. Illustratively, when the processor detects that the second support plate 12 reaches the preset position, the processor sends the detection result to the second control component, which energizes the electromagnet 8 to make the electromagnet 18 have a magnetic action.

In the embodiment of the invention, as the display device further comprises the positioning piece 7 and the electromagnet 8, the positioning piece 7 is connected with the surface of one side of the flexible display panel 3, which is far away from the light-emitting surface; the electromagnet 8 is connected with the supporting surface of the second supporting plate 12, so that when the flexible display panel 3 is located on the second supporting plate 12, the magnetic force generated by the positioning piece 7 and the electromagnet 8 is attracted, so that the flexible display panel 3 can be fixed on the second supporting plate 12, the flexible display panel 3 can be leveled in the second direction Y, and the flatness of the flexible display panel 3 is ensured.

In some embodiments, as shown in fig. 17, the display device further includes a housing 9 located at the back of the first support plate 11, the housing 9 is slidably connected to the first support plate 11, and a receiving cavity is formed between the housing 9 and the first support plate 11; the receiving cavity is for receiving the elastic member 4, the reel 2 and at least a portion of the flexible display panel 3.

Illustratively, the bottom of the housing 9 is further provided with a protruding structure, and one end of the elastic element 4 is connected with the protruding structure, and the other end is connected with the flexible display panel 3. Further, both ends of the shaft core 20 are connected to the housing 9.

Note that, at least a part of the accommodating chamber accommodating the flexible display panel 3 is the flexible display panel 3 wound on the reel 2 and the flexible display panel 3 located on the back of the first support plate 11.

It is considered that after the housing 9 is slidably connected to the first support plate 11 due to the thinness of the first support plate 11, when the number of times the housing 9 slides on the first support plate 11 is large, the first support plate 11 may be damaged, and the flexible display panel 3 may be damaged. Based on this, in some embodiments, as shown with reference to fig. 17, the display device further includes a support member 10, the support member 10 being located between the first support plate 11 and the housing 9; the supporting part 10 is parallel to the back surface of the first supporting plate 11, and one side of the supporting part 10 close to the first supporting plate 11 is connected with the first supporting plate 11; the side of the support member 10 adjacent to the housing 9 is slidably connected to the housing 9.

It should be noted that, since the side of the supporting member 10 close to the first supporting plate 11 is connected to the first supporting plate 11, in the case where the side of the supporting member 10 close to the housing 9 is slidably connected to the housing 9, that is, the housing 9 and the first supporting plate 11 are slidably connected through the supporting member 10.

For example, in the first direction X, the frame region of the supporting member 9 has a sliding rail, and the frame region of the housing 9 has a sliding groove, and the sliding rail and the sliding groove cooperate with each other to slidably connect the supporting member 10 and the housing 9.

In a possible embodiment, since the supporting member 10 is slidably connected to the housing 9, when it is required to increase the area of the display area of the flexible display panel 3, the user's finger pulls the housing 9 to move along the first direction X, at which time the first supporting plate 11 is fixed with the supporting member 10, and the housing 9 is translated relative to the first supporting plate 11 and the supporting member 10 along the first direction X; the shaft core 20 is connected with the housing 9, the winding drum 21 is nested on the shaft core 20, so that the housing 9 drives the winding shaft 2 to translate along the first direction X (that is, the winding shaft 2 translates), and because the flexible display panel 3 covers the winding shaft 2, one end of the elastic element 4 is fixedly connected with the housing 9, and the other end is connected with the flexible display panel 3, the flexible display panel 3 also translates along the first direction X, and the friction force generated on the surfaces of the flexible display panel 3 and the winding drum 21 enables the winding drum 21 to rotate around the shaft core 20, so that the flexible display panel 3 can be unfolded out of the winding shaft 2, on this basis, the winding drum 21 is connected with the second support plate 12 in a sliding manner, and the winding drum 21 drives the second support plate 12 to be drawn out of the first support plate 11, so that the second support plate 12 plays a role in supporting the area of the display area of the.

Based on the above, in the embodiment of the present invention, the display device further includes the supporting member 10, and one side of the supporting member 10 close to the housing 9 is slidably connected to the housing 9, so that the supporting member 10 can protect the first supporting plate 11, and ensure that the first supporting plate 11 is not damaged due to sliding of the housing 9, thereby reducing the risk of damage to the flexible display panel 3 and improving the service life of the display device.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A display device, comprising:

the supporting plate at least comprises a first supporting plate and a second supporting plate; at least one part of the second support plate is embedded in the first support plate and is in sliding connection with the first support plate along a first direction;

the scroll is arranged on one side of the supporting plate along a second direction; the winding shaft comprises a winding drum and a shaft core nested in the winding drum, and the winding drum rotates around the shaft core; one part of the winding drum is connected with one end of the second support plate far away from the first support plate in a sliding mode; the second direction is perpendicular to the first direction;

the elastic element is positioned on the back surface of the first supporting plate and is used for generating elastic deformation under the action of external force;

the flexible display panel is positioned on the supporting surface of the first supporting plate, is connected with the first supporting plate, covers the reel and is connected with the elastic element; the support surface is arranged opposite to the back surface.

2. The display device according to claim 1,

the first supporting plate comprises a first side wall and a second side wall which are opposite, the first side wall is provided with at least one first limiting hole, and the second side wall is provided with at least one second limiting hole; a vertical projection of a first limiting hole on the second side wall is overlapped with a second limiting hole; the first side wall and the second side wall are parallel to the first direction;

the display device also comprises a limiting rod, and the limiting rod is connected with one end, far away from the scroll, of the second support plate; along the second direction, the first end of gag lever post is used for with first spacing hole cooperatees, the second end of gag lever post is used for with the spacing hole of second cooperatees to inject the displacement of second backup pad.

3. The display device according to claim 2,

the first side wall is provided with a first limiting hole, the first limiting hole penetrates through the first side wall, the second side wall is provided with a second limiting hole, and the second limiting hole penetrates through the second side wall;

the second supporting plate comprises a third side wall and a fourth side wall which are opposite, the third side wall is provided with a first through hole, and the fourth side wall is provided with a second through hole; the vertical projection of the first through hole on the first side wall is overlapped with at least one part of the first limiting hole; the vertical projection of the second through hole on the second side wall is overlapped with at least one part of the second limiting hole;

the first end of the limiting rod is located in the first limiting hole and the first through hole and is in clearance fit with the first limiting hole and the first through hole, and the second end of the limiting rod is located in the second limiting hole and the second through hole and is in clearance fit with the second limiting hole and the second through hole.

4. The display device according to claim 1 or 2, further comprising:

the shell is positioned on the back surface of the first supporting plate; the shell is connected with the first supporting plate in a sliding mode, and an accommodating cavity is formed between the shell and the first supporting plate; the accommodating cavity is used for accommodating the elastic element, the scroll and at least one part of the flexible display panel.

5. The display device according to claim 4, further comprising:

a support member positioned between the first support plate and the housing; the supporting part is parallel to the back surface of the first supporting plate, and one side of the supporting part close to the first supporting plate is connected with the first supporting plate; one side of the supporting component close to the shell is connected with the shell in a sliding mode.

6. The display device according to claim 4, wherein both ends of the shaft core are connected to the housing.

7. The display device according to claim 1, further comprising:

the connecting part is used for connecting a part of the reel with one end of the second support plate far away from the first support plate in a sliding way;

flanges are arranged at two ends of the winding drum, and the flexible display panel is positioned in the flanges; the outer side wall of the flange is provided with a groove arranged along the circumferential direction of the winding drum;

the connecting part comprises a first connecting rod, a second connecting rod and a third connecting rod; the first end of the first connecting rod is connected with one end of the second connecting rod, and the other end of the second connecting rod is connected with the second supporting plate; the second end of the first connecting rod is connected with one end of the third connecting rod, and the other end of the third connecting rod is located in the groove and matched with the groove.

8. The display device according to claim 1, further comprising:

the connecting part comprises a first connecting rod, a second connecting rod and a third connecting rod; the first end of the first connecting rod is connected with one end of the second connecting rod, and the other end of the second connecting rod is connected with the second supporting plate; the second end of the first connecting rod is connected with one end of the third connecting rod, and the other end of the third connecting rod is connected with the shaft core.

9. The display device according to claim 1,

the surface of the first support plate, which is in contact with the winding drum, is an arc surface, and the surface of the second support plate, which is connected with the winding drum, is an arc surface; the curvature of the arc surface is the same as that of the surface of the winding drum;

in the area of the arc surface, the thicknesses of the supporting surfaces of the first supporting plate and the second supporting plate are sequentially reduced along the first direction.

10. The display device according to claim 1, further comprising:

the positioning piece is connected with the surface of one side of the flexible display panel, which is far away from the light-emitting surface;

the electromagnet is connected with the supporting surface of the second supporting plate; the positioning piece is used for attracting magnetic force generated by the electromagnet.