WO2021233013A1

WO2021233013A1 - Rollable display device

Info

Publication number: WO2021233013A1
Application number: PCT/CN2021/086755
Authority: WO
Inventors: 罗晓飞; 祝尚杰; 朱红
Original assignee: 京东方科技集团股份有限公司
Priority date: 2020-05-22
Filing date: 2021-04-13
Publication date: 2021-11-25

Abstract

A rollable display device, comprising a housing (1), a driving mechanism and a flexible bearing film (4) which are provided in the housing (1), and a flexible display screen (5). The flexible bearing film (4) is configured to rotate under the driving of the driving mechanism; a first end of the flexible display screen (5) is fixed to the flexible bearing film (4), a second end of the flexible display screen (5) is configured to extend out of the housing (1) from an opening (101) formed in the housing (1), and the flexible display screen (5) can be rolled on the flexible bearing film (4) and can be unfolded under the pulling of external force.

Description

Rollable display device

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on May 22, 2020, the application number is 202010443112X, and the invention title is "a rollable display device", and it is requested to be filed in China on May 22, 2020 The patent office, the application number is 2020208870846, the priority of the Chinese patent application with the title of the invention is "a rollable display device", the content of which should be understood as being incorporated into this application by reference.

Technical field

The embodiments of the present application relate to, but are not limited to, the technical field of display devices, and in particular to a rollable display device.

Background technique

With the advancement of science and technology and the development of society, flexible display screens have gradually come into the eyes of consumers. While flexible display screens that can be rolled are convenient for consumers' lives, they also bring consumers a brand new user experience. When some rollable display devices wind up the flexible display screen, due to the limited diameter of the reel for winding the flexible display screen, as the number of winding turns increases, the accumulation of stress and strain will increase, and the film layers of the flexible display screen will squeeze. Severe pressure can easily cause display failure.

Summary of the invention

The following is an overview of the topics detailed in this article. This summary is not intended to limit the scope of protection of the claims.

The embodiment of the present application provides a rollable display device, including a housing, a driving mechanism and a flexible bearing film arranged in the housing, and a flexible display screen; the flexible bearing film is configured to be able to be driven by the drive mechanism Rotate downward; the first end of the flexible display screen is fixed on the flexible supporting film, and the second end of the flexible display screen is arranged to extend out of the housing from the opening provided on the housing, so The flexible display screen can be wound on the flexible carrying film and can be unfolded under the pulling of an external force.

After reading and understanding the drawings and detailed description, other aspects can be understood.

Description of the drawings

The accompanying drawings are used to provide an understanding of the embodiments of the present application, and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solutions of the embodiments of the present application, and do not constitute a limitation to the technical solutions of the embodiments of the present application.

FIG. 1 is a schematic structural diagram of some exemplary embodiments of a rollable display device when the flexible display screen is in an unfolded state;

2 is a schematic diagram of the structure of other exemplary embodiments of the rollable display device when the flexible display screen is in an unfolded state;

FIG. 3 is a schematic diagram of the structure of the rollable display device of FIG. 2 in another viewing angle in some exemplary embodiments;

4 is a schematic diagram of the installation structure of the drive mechanism and the flexible carrier film of the rollable display device in some exemplary embodiments;

5 is a schematic diagram of the installation structure of the drive mechanism and the flexible carrier film of the rollable display device in other exemplary embodiments;

6 is a schematic diagram of the installation structure of the drive shaft, the driven shaft, the flexible carrier film, and the flexible display screen of the rollable display device in some exemplary embodiments;

7 is a schematic diagram of the installation structure of the flexible display screen and the supporting sheet of the rollable display device in some exemplary embodiments;

The reference signs are:

1. Housing, 101, opening, 2, drive shaft, 201, first transmission mating part, 202, first step, 3. driven shaft, 301, second transmission mating part, 302, second step, 4. Flexible carrier film, 401, transmission part, 402, the first end of the flexible carrier film, 403, the second end of the flexible carrier film, 5, the flexible display screen, 501, the first end of the flexible display screen, 502, the flexible display screen The second end, 6, the transmission device, 601, the first gear, 602, the second gear, 603, the third gear, 7, the reel, 8, the support piece, 9, the retractable bracket, 901, the first connecting rod, 902. The second connecting rod, 11, the first supporting plate, 12, the second supporting plate, 13, the first cover, 14, the second cover.

Detailed ways

Those of ordinary skill in the art should understand that the technical solutions of the embodiments of the present application can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the embodiments of the present application, and should be covered by the scope of the claims of the present application.

As shown in Figures 1 and 6, the embodiments of the present application provide a rollable display device, which includes a housing 1, a driving mechanism and a flexible carrier film 4 arranged in the housing 1, and a flexible display screen 5; the flexible carrier film 4 is set to be able to rotate under the drive of the driving mechanism; the first end 501 of the flexible display screen 5 is fixed on the flexible carrier film 4, and the second end 502 of the flexible display screen 5 is set as an opening provided from the housing 1. 101 extends out of the housing 1, and the flexible display screen 5 can be wound on the flexible carrier film 4 and can be unfolded under the pull of an external force.

The rollable display device of the embodiment of the present application is provided with a flexible carrier film 4 that rotates under the drive of a driving mechanism, and the flexible display screen 5 is wound on the flexible carrier film (the flexible carrier film is in the shape of a loop) 4, so that The circumferential length of the flexible carrier film 4 is designed to be larger according to actual needs. When the flexible display screen 5 is wound on the flexible carrier film 4, the number of winding turns of the flexible display screen 5 can be reduced, thereby reducing the flexible display screen 5 The strain accumulation of the flexible display screen 5 reduces the squeezing between the film layers of the flexible display screen 5, and it is not easy to cause damage to the flexible display screen 5.

As shown in Figures 1 and 4, in some exemplary embodiments, the drive mechanism includes a drive shaft 2 and a driven shaft 3 that are rotatable in the housing 1, and a second drive shaft that can drive the drive shaft 2 to rotate. A driving component, the flexible bearing film 4 is sleeved on the driving shaft 2 and the driven shaft 3, and is configured to be able to drive the driven shaft 3 to rotate when the driving shaft 2 rotates. In an example of this embodiment, the drive shaft 2 and the driven shaft 3 are arranged in parallel, the axial directions of the drive shaft 2 and the driven shaft 3 are perpendicular to the direction of rotation of the flexible carrier film 4, and the two sides of the drive shaft 2 and the driven shaft 3 The end may be provided on the housing 1 in a rotatable manner. In some exemplary embodiments, the flexible carrier film 4 is provided with a plurality of transmission parts 401 in the circumferential direction at positions close to both side edges, and the plurality of transmission parts 401 may be arranged at even intervals. The driving shaft 2 is provided with a plurality of first transmission matching parts 201 in the circumferential direction at positions near the two ends, and the driven shaft 3 is provided with a plurality of second transmission matching parts 301 in the circumferential direction at positions close to the two ends. The transmission matching portion 301 is configured to cooperate with the transmission portion 401 for transmission during the rotation of the flexible bearing film 4, so that the driving shaft 2 drives the driven shaft 3 to rotate through the flexible bearing film 4 during the rotation. In some exemplary embodiments, the transmission part 401 may be a through hole, and the shape of the through hole may be rectangular, trapezoidal, circular, etc., and the first transmission matching part 201 and the second transmission matching part 301 are both adapted to the through hole. Protrusions, the shape of the protrusions can be rectangular block, trapezoidal block, cylindrical, hemispherical, and the like. The part of the flexible carrier film 4 that contacts the driving shaft 2 and the driven shaft 3 during the rotation is attached to the outer circumferential surfaces of the driving shaft 2 and the driven shaft 3. In some exemplary embodiments, the width of the flexible display screen 5 (not shown in FIG. 4) may be smaller than the width of the flexible carrier film 4, and the edges on both sides of the flexible display screen 5 are located at the transmission parts on both sides of the flexible carrier film 4. In this way, the flexible display screen 5 does not hinder the cooperation of the transmission part 401 with the first transmission matching part 201 and the second transmission matching part 301. As shown in FIG. 1, when the rollable display device of this exemplary embodiment is not in use, the flexible display screen 5 is in a rolled state, and the second end 502 of the flexible display screen 5 is located outside the housing 1. When the flexible display screen 5 needs to be unfolded, an external force can be used to pull the second end 502 of the flexible display screen 5 to unfold the flexible display screen 5. The drive shaft 2 of the flexible display screen 5 rotates forward during the unfolding process, and the drive shaft 2 reverses during the winding process of the flexible display screen 5. The second end 502 of the flexible display screen 5 may be provided with a circuit board for connecting with an external driving device to drive the flexible display screen 5 for display.

In some exemplary embodiments, the material of the flexible carrier film 4 may include polyethylene (PE for short), polypropylene (PP for short), polystyrene (PS for short), and polyethylene terephthalate. One or more of Polyethylene Terephthalate (PET for short), Polyethylene Naphthalate (PEN for short), and Polyimide (PI for short). When the flexible display screen 5 is in the rolling state, the film layers will squeeze each other, especially under the condition of long-term static rewinding or high temperature and high humidity, stress relaxation and creep will occur, and the film layers are likely to be damaged by the squeezing action. As shown in Figure 6, the part of the flexible carrier film 4 located between the drive shaft 2 and the driven shaft 3 has a certain deformation ability because it does not contact the drive shaft 2 and the driven shaft 3, so that it can absorb the flexible display screen. The deformation produced by 5 can effectively reduce the mutual squeezing force between the film layers of each circle of the flexible display screen 5, and improve the reliability of the use of the flexible display screen 5.

As shown in FIG. 1, in some exemplary embodiments, the first driving component may be a motor, a torsion spring, a coil spring, or the like. The motor is set to drive the drive shaft 2 to rotate forward or reverse to match the unfolding or rewinding action of the flexible display screen 5. The torsion spring and the coil spring can be set to undergo elastic deformation during the unwinding process of the flexible display screen 5, and use its own elastic force to drive the drive shaft 2 to reverse when the flexible display screen 5 needs to be rolled, so that the flexible display screen 5 is rolled up. The torsion spring and the coil spring are collectively referred to as an elastic member. In some exemplary embodiments, the elastic member may be provided at the end of the drive shaft 2, one end of the elastic member is fixed to the drive shaft 2, and the other end of the elastic member is fixed to the housing 1. .

As shown in FIG. 6, the directions of the two arrows in FIG. 6 respectively represent the rotation directions of the driving shaft 2 and the driven shaft 3 during the winding process of the flexible display screen 5. In some exemplary embodiments, a first step 202 is provided on the outer circumferential surface of the driving shaft 2, a second step 302 is provided on the outer circumferential surface of the driven shaft 3, and both ends of the flexible bearing film 4 are lapped and fixed ( The flexible carrier film 4 is in the shape of a loop as a whole, which can also be understood as a cylindrical shape), the first end 501 of the flexible display screen 5 is butted with the first end 402 of the flexible carrier film 4; When the second end 403 of the supporting film 4 is matched with one of the first step 202 and the second step 302 (that is, the second end 403 of the flexible supporting film 4 is filled at the first step 202 or the second step 302), the first The other of the step 202 and the second step 302 is not in contact with the flexible carrier film 4, and is arranged so that when the second end 403 of the flexible carrier film 4 is not in contact with the driving shaft 2 and the driven shaft 3, the first step 202 and None of the second steps 302 are in contact with the flexible carrier film 4. In an example of this embodiment, the first step 202 is provided along the axial direction of the driving shaft 2, and the second step 302 is provided along the axial direction of the driven shaft 3. The height of the first step 202 and the second step 302 is the same as the thickness of the flexible carrier film 4, and the thickness of the flexible carrier film 4 is the same as the thickness of the flexible display screen 5. During the rotation of the flexible carrier film 4, the overlapping positions of the two ends of the flexible carrier film 4 rotate accordingly, and the second end 403 of the flexible carrier film 4 can rotate to a position in contact with the driving shaft 2 and a position in contact with the driven shaft 3. The position, and the position that is not in contact with the driving shaft 2 and the driven shaft 3. A first step 202 and a second step 302 are respectively provided on the driving shaft 2 and the driven shaft 3, and the two ends of the flexible supporting film 4 are overlapped and fixed, and the first end 501 of the flexible display screen 5 is connected to the flexible supporting film. 4 is connected to the first end 402 (the first end 501 of the flexible display screen 5 can be glued to the outer surface of the flexible carrier film 4), and the second end 403 of the flexible carrier film 4 is used to fill the first Step 202 or second step 302, so that no height difference is formed between the first end 501 of the flexible display screen 5 and the outer surface of the flexible carrier film 4, and then when the flexible display screen 5 is wound on the flexible carrier film 4 , The first end 501 of the flexible display screen 5 will not cause stress concentration on a part of the flexible display screen 5, and will not cause damage to the flexible display screen 5.

As shown in FIG. 6, in an example of this embodiment, the diameter of the outer circumferential surface of the driving shaft 2 gradually increases from the lower position of the first step 202 to the higher position of the first step 202, and the diameter of the driven shaft 3 The diameter of the outer circumferential surface gradually increases from the lower position of the second step 302 to the higher position of the second step 302. In this way, the curvature of the outer circumferential surface of the drive shaft 2 and the driven shaft 3 gradually changes smoothly, and the curvature of the part where the flexible bearing film 4 is attached to the outer circumferential surface of the drive shaft 2 and the driven shaft 3 is also smooth. The flexible display screen 5 can be smoothly wound on the flexible carrier film 4 without causing local stress concentration. In this exemplary embodiment, the diameter of the outer circumferential surface of the drive shaft 2 and the driven shaft 3, the shaft distance between the drive shaft 2 and the driven shaft 3, and other parameters can be comprehensively designed to ensure the flexible bearing film 4 The above-mentioned cooperation of the second end 403 with the first step 202 and the second step 302. The structure of the driving shaft 2 and the driven shaft 3 can be the same. The larger the diameter of the outer circumferential surface of the driving shaft 2 and the driven shaft 3, the larger the shaft distance between the driving shaft 2 and the driven shaft 3, and the flexible display screen 5 The smaller the number of winding turns, the smaller the strain accumulation of the flexible display screen 5, and the less likely it is to cause damage to the flexible display screen 5.

As shown in FIG. 5, in some exemplary embodiments, the rollable display device further includes a transmission device 6 provided between the drive shaft 2 and the driven shaft 3. The drive shaft 2 drives the driven shaft 3 to synchronize through the transmission device 6 Rotate. In this exemplary embodiment, when the diameters of the outer circumferential surfaces of the drive shaft 2 and the driven shaft 3 are larger, the required rewinding force is smaller in the process of rewinding the flexible display screen 5, and the drive shaft 2 is flexibly carried. The membrane 4 easily drives the driven shaft 3 to rotate. When the diameters of the outer circumferential surfaces of the driving shaft 2 and the driven shaft 3 are small, the required rewinding force is relatively large, and an additional transmission device needs to be added to drive the driving shaft 2 and the driven shaft 3 to rotate. In this exemplary embodiment, the transmission device 6 provided can ensure that the transmission speed and rotational displacement of the drive shaft 2 and the driven shaft 3 are always the same, and the synchronization of the rotation of the drive shaft 2 and the driven shaft 3 can be ensured. In this exemplary embodiment, the structure of the transmission device 6 is not limited, and the transmission device 6 may be a gear transmission mechanism, a belt transmission mechanism, a chain transmission mechanism, or a linkage mechanism. In an example of this embodiment, the transmission device 6 is a gear transmission device. The transmission device 6 includes a first gear 601 fixed on the drive shaft 2, a second gear 602 fixed on the driven shaft 3, and a gear that can rotate. The third gear 603 is arranged on the housing 1 and meshes with both the first gear 601 and the second tooth. The first gear 601 and the second gear 602 are provided at the ends of the driving shaft 2 and the driven shaft 3, respectively. The transmission device 6 may be arranged at the ends of the drive shaft 2 and the driven shaft 3, and the ends of the drive shaft 2 and the driven shaft 3 may be located inside the housing 1 or extend outside the housing 1. The transmission device 6 may be arranged inside the housing 1 or arranged outside the housing 1.

As shown in FIGS. 1, 3, and 7, in some exemplary embodiments, the rollable display device further includes a reel 7 provided in the housing 1 in a rotatable manner, and a second drive capable of driving the reel 7 to rotate. Component and support sheet 8, one end of the support sheet 8 is fixed on the reel 7, the other end of the support sheet 8 protrudes from the opening 101 on the housing 1 and is fixed to the second end 502 of the flexible display screen 5, the support sheet 8 is arranged The flexible display screen 5 is wound on the reel 7 when the flexible display screen 5 is in the winding state, and is arranged to be unfolded and supported on the side of the flexible display screen 5 facing away from the display side when the flexible display screen 5 is in the unfolded state. In an example of this embodiment, the supporting sheet 8 may be a thin metal sheet that can be wound on the reel 7 and can be unrolled, for example, a stainless steel sheet or the like. The supporting sheet 8 can be wound on the reel 7 or unrolled in accordance with the unfolding action or the unwinding action of the flexible display screen 5. One end of the support sheet 8 is fixed on the reel 7, and the other end of the support sheet 8 extends from the opening 101 on the housing 1 and is fixed to the second end 502 of the flexible display screen 5. The rest of the support sheet 8 is connected to the flexible display screen. 5 No connection. The supporting sheet 8 and the flexible display screen 5 are respectively wound on the reel 7 and the flexible carrier film 4. The axial direction of the reel 7 is parallel to the axial directions of the drive shaft 2 and the driven shaft 3. The width of the support sheet 8 may be the same as the width of the flexible display screen 5. When the flexible display screen 5 is in the unfolded state, the supporting sheet 8 provided can support the flexible display screen 5. In an example of this embodiment, the second driving component may be a motor, a torsion spring, a coil spring, or the like. The motor is configured to drive the reel 7 to rotate forward or reverse to cooperate with the unwinding or rewinding action of the support sheet 8. The torsion spring and the coil spring can be set to be elastically deformed during the unwinding of the support sheet 8, and when the support sheet 8 needs to be rewinded, the reel shaft 7 is driven to reverse by its own elastic force, so that the support sheet 8 is rewinded. The torsion spring and the coil spring are collectively referred to as an elastic member. In some exemplary embodiments, the elastic member may be provided at the end of the reel 7, one end of the elastic member is fixed to the reel 7, and the other end of the elastic member is fixed to the housing 1.

As shown in FIGS. 1 and 2, in some exemplary embodiments, the rollable display device further includes a first support plate 11 and a second support plate 12, a first cover 13 and a second cover 14, which are arranged oppositely. The housing 1 is fixed between the first support plate 11 and the second support plate 12. The two ends of the driving shaft 2, the driven shaft 3 and the reel 7 may be rotatably arranged on the housing 1 or may be rotatably arranged on the first support plate 11 and the second support plate 12. Both ends of the reel 7 and the drive shaft 2 movably pass through the housing 1. The first cover 13 can be provided as one, and the first cover 13 is fixed on the first support plate 11 or the second support plate 12 and covered at one end of the reel 7, or the first cover 13 is provided with two, two The first cover bodies 13 are respectively fixed on the first support plate 11 and the second support plate 12 and cover the two ends of the reel 7 respectively. In some exemplary embodiments, the second driving component is a torsion spring and is sleeved on the end of the reel 7, and the two end feet of the torsion spring are fixed on the reel 7 and the inner wall of the first cover 13 respectively. The second driving part may be provided at only one end of the reel 7 or the second driving part may be provided at both ends of the reel 7. The second cover 14 can be provided with one or two. The second cover 14 is arranged in the same manner as the first cover 13. The second cover 14 is provided at the end of the drive shaft 2, and the first drive component is a twist The spring is sleeved on the end of the drive shaft 2, and the two end legs of the torsion spring are fixed on the drive shaft 2 and the second cover 14 respectively. The first driving part may be provided at only one end of the driving shaft 2, or the first driving part may be provided at both ends of the driving shaft 2.

As shown in FIGS. 1 and 3, in some exemplary embodiments, the rollable display device further includes a retractable bracket 9 located outside the housing 1, and one end of the retractable bracket 9 is fixed to the housing 1 (which may be a housing 1), the other end of the retractable bracket 9 is fixed to the second end 502 of the flexible display screen 5, and the retractable bracket 9 is arranged to support the support sheet 8 when the flexible display screen 5 is in the unfolded state. The side facing away from the flexible display screen 5. The retractable support 9 of the present exemplary embodiment gradually unfolds following the flexible display screen 5 during the unfolding process of the flexible display screen 5, and gradually folds following the flexible display screen 5 during the winding process of the flexible display screen 5. The retractable bracket 9 can support the flexible display screen 5 in the unfolded state. The support sheet 8 is located between the flexible display screen 5 and the telescopic support 9, and the surface of the support sheet 8 is a flat surface. In this way, when the support surface of the telescopic support 9 is not flat, the support sheet 8 can provide a support for the flexible display screen 5. Supporting flat supporting surface to protect the flexible display screen 5. This exemplary embodiment does not limit the structure of the telescopic bracket 9. In an example of this embodiment, the retractable support 9 includes a plurality of first links 901 hinged in sequence and a plurality of second links 902 hinged in sequence. The first link 901 and the second link 902 may both be flat. The middle position of each first connecting rod 901 is hinged to the middle position of a corresponding second connecting rod 902, and the first connecting rod 901 and the second connecting rod 902 at one end of the telescopic bracket 9 are both hinged to the housing On the outer wall of 1, the first connecting rod 901 and the second connecting rod 902 at the other end of the telescopic bracket 9 are both hinged to the second end 502 of the flexible display screen 5. All the hinged positions of the retractable bracket 9 can be hinged.

In the description herein, unless otherwise clearly defined and defined, the terms "connection", "fixed connection", "installation", and "assembly" shall be interpreted broadly, for example, it may be a fixed connection or a detachable connection, or Integrally connected; the terms "installation", "connection", and "fixed connection" can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two components. Those of ordinary skill in the art can understand the meaning of the above-mentioned terms in this document.

Claims

A rollable display device, comprising a casing, a driving mechanism and a flexible bearing film arranged in the casing, and a flexible display screen;

The flexible carrier film is configured to be able to rotate under the drive of the driving mechanism;

The first end of the flexible display screen is fixed on the flexible supporting film, and the second end of the flexible display screen is arranged to protrude from the opening provided on the casing to the outside of the casing, and the flexible display The screen can be wound on the flexible carrier film and can be unfolded under the pull of external force.
3. The rollable display device of claim 1, wherein: the driving mechanism comprises a driving shaft and a driven shaft that are rotatable provided in the housing, and a first driving member capable of driving the driving shaft to rotate, The flexible bearing film is sleeved on the driving shaft and the driven shaft, and is configured to drive the driven shaft to rotate when the driving shaft rotates.
The rollable display device according to claim 2, wherein: the flexible supporting film is provided with a plurality of transmission parts along the circumferential direction at positions close to both side edges, and the driving shaft and the driven shaft near the two ends are arranged along the circumferential direction. A plurality of transmission cooperating parts are provided in the circumferential direction, and the transmission cooperating parts are arranged to cooperate with the transmission parts for transmission during the rotation of the flexible carrier film.
3. The rollable display device according to claim 3, wherein: the transmission part is a through hole, and the transmission matching part is a protrusion that fits the through hole.
The rollable display device according to claim 3, wherein: the width of the flexible display screen is smaller than the width of the flexible supporting film, and both sides of the flexible display screen are located on both sides of the flexible supporting film. Between the transmission parts.
The rollable display device according to claim 2, wherein: a first step is provided on the outer circumferential surface of the driving shaft, a second step is provided on the outer circumferential surface of the driven shaft, and the flexible bearing film The two ends of the flexible display screen are lapped and fixed, and the first end of the flexible display screen is butted with the first end of the flexible carrier film;

The driving mechanism is arranged such that when the second end of the flexible carrying film is engaged with one of the first step and the second step, the other of the first step and the second step is not Is in contact with the flexible carrier film, and is arranged such that when the second end of the flexible carrier film is not in contact with the driving shaft and the driven shaft, the first step and the second step are not in contact with Flexible carrier film contact.
The rollable display device of claim 6, wherein: the heights of the first step and the second step are the same as the thickness of the flexible carrier film, and the thickness of the flexible carrier film is the same as that of the flexible display screen. The thickness is the same.
7. The rollable display device of claim 6, wherein: the diameter of the outer circumferential surface of the drive shaft gradually increases from a lower position of the first step to a higher position of the first step, the The diameter of the outer circumferential surface of the driven shaft gradually increases from the lower position of the second step to the higher position of the second step.
3. The rollable display device of claim 2, further comprising a transmission device provided between the drive shaft and the driven shaft, and the drive shaft drives the driven shaft to rotate synchronously through the transmission device.
The rollable display device according to claim 9, wherein: the transmission device is a gear transmission device, and the transmission device includes a first gear fixed on the drive shaft and a second gear fixed on the driven shaft. Two gears, and a third gear that is rotatably arranged on the housing and meshes with both the first gear and the second tooth.
The rollable display device according to any one of claims 1-10, further comprising a reel provided in the housing in a rotatable manner, a second driving member capable of driving the reel to rotate, and a support sheet, the One end of the support sheet is fixed on the reel, the other end of the support sheet protrudes from the opening and is fixed to the second end of the flexible display screen, and the support sheet is set to be positioned at the flexible display screen. When the flexible display is in the unwinding state, it is wound on the reel and is arranged to be unfolded and supported on the side of the flexible display facing away from the display side when the flexible display is in the unfolded state.
The rollable display device according to claim 11, further comprising two supporting plates and a first cover, the housing is fixed between the two supporting plates, and both ends of the reel movably pass through the Housing, the first cover is fixed on the support plate and is arranged on the end of the reel, the second driving component is a torsion spring and is sleeved on the end of the reel, the torsion The two end feet of the spring are respectively fixed on the reel and the first cover.
The rollable display device of claim 11, further comprising a retractable bracket located outside the housing, one end of the retractable bracket is fixed on the housing, and the other end of the retractable bracket is fixed on the housing. At the second end of the flexible display screen, the retractable support is configured to be supported on a side of the support sheet away from the flexible display screen when the flexible display screen is in an unfolded state.
The rollable display device according to claim 13, wherein: the retractable support includes a plurality of first links that are hinged in sequence and a plurality of second links that are hinged in sequence, and the middle of each of the first links The position is hinged with the middle position of the corresponding one of the second connecting rods, the first connecting rod and the second connecting rod at one end of the telescopic bracket are both hinged on the housing, and are located on the The first link and the second link at the other end of the telescopic bracket are both hinged to the second end of the flexible display screen.
The rollable display device according to claim 2, further comprising two support plates and a second cover, the housing is fixed between the two support plates, and both ends of the drive shaft movably pass through The housing, the second cover body is fixed on the support plate and covered on the end of the drive shaft, the first drive component is a torsion spring and is sleeved on the end of the drive shaft, The two end feet of the torsion spring are respectively fixed on the drive shaft and the second cover body.