CN114203053B

CN114203053B - Display device

Info

Publication number: CN114203053B
Application number: CN202210064339.2A
Authority: CN
Inventors: 张家豪; 王宗元; 刘君欢; 朱厚坤; 朱红
Original assignee: BOE Technology Group Co Ltd
Current assignee: BOE Technology Group Co Ltd
Priority date: 2022-01-20
Filing date: 2022-01-20
Publication date: 2023-12-29
Anticipated expiration: 2042-01-20
Also published as: CN114203053A

Abstract

The application discloses a display device belongs to and shows technical field. The display device may include: the flexible display panel, first casing, second casing, reel and spacing subassembly. The first limiting piece and the limiting assembly are arranged in the winding drum, and the first limiting piece can be clamped with the second limiting piece in the limiting assembly. When the display device is impacted, the central rod in the limiting assembly can be kept motionless under the action of inertia due to the elastic element arranged in the limiting assembly. Therefore, at the moment of impact, the center rod in the limiting assembly moves towards the inner wall of the winding drum, which is close to the first limiting piece, so that the second limiting piece sleeved on the third center rod is clamped with the first limiting piece, the rotating speed of the winding drum can be greatly slowed down at the moment of impact, the probability of separation of the winding drum and the curled display substrate is lower, the probability of damage caused by collision between the curled display substrate and the second shell is effectively reduced, and the service life of the display device is effectively prolonged.

Description

Display device

Technical Field

The present disclosure relates to the field of display technologies, and in particular, to a display device.

Background

With the development of display technology, more and more display devices are equipped with flexible display panels such as a folding display screen or a scrolling display screen. The display device provided with the flexible display panels can realize the switching of the physical size of the display device, and greatly improves the use experience of users.

Wherein, the display device equipped with the slide coil display screen can adjust the display size of the display device in a curling and sliding mode. For example, a display device equipped with a slide-roller display screen may further include: a housing for providing support to the slide roll display, and a spool attached to a portion of the slide roll display. When the scroll rotates, the sliding scroll display screen can be driven to be rolled or unrolled, and then the display device can be adjusted to display size.

However, when a display device equipped with the roll display screen is impacted, the roll display screen is easily separated from the reel and collides with the housing, so that the roll display screen is easily damaged, and the service life of the display device is reduced.

Disclosure of Invention

The embodiment of the application provides a display device. The problem of prior art's display device's life is lower can be solved, technical scheme is as follows:

in one aspect, there is provided a display device including:

a flexible display panel having a flat display substrate and a curled display substrate;

a first housing for supporting the flat display substrate;

a second housing slidably coupled to the first housing;

the two ends of the winding drum are connected with the second shell, the curled display substrate is attached to the outer wall of the winding drum after bypassing the winding drum, and the inner wall of the winding drum is provided with a first limiting piece;

and be located spacing subassembly in the reel, spacing subassembly's both ends all with the second casing is connected, spacing subassembly includes: the elastic element is connected with the end part of the central rod, and the second limiting piece is sleeved on the central rod;

wherein the spacing assembly is configured to: after the second shell receives impact force, the elastic element drives the center rod to move towards the inner wall of the winding drum, so that the first limiting piece is clamped with the second limiting piece.

Optionally, the first limiting member comprises a plurality of protrusions distributed around a circumferential array within the spool, and the second limiting member comprises a plurality of claws distributed around an axis of the central rod;

the end part of the claw, which is away from the center rod, is positioned between two adjacent protrusions, and is in clamping connection with the second limiting piece when the claw is in abutting connection with the protrusions.

Optionally, the spool is configured to: when the second shell slides in a direction deviating from the first shell, the second shell rotates around a first direction to drive the curled display substrate to be unfolded;

when the end part of the claw, which is away from the center rod, is located between the first protrusion and the second protrusion, the end part of the claw, which is away from the center rod, is abutted against the second protrusion, the first protrusion and the second protrusion are any two adjacent protrusions in the plurality of protrusions, and the first protrusion and the second protrusion are distributed around the first direction.

Optionally, the protrusions are ratchet teeth, and the tooth shape of the ratchet teeth is any one of an asymmetric triangle, an asymmetric circular arc and an asymmetric trapezoid.

Optionally, the number of the elastic elements is two, and the first ends of the two elastic elements are respectively connected with two ends of the central rod, and the second ends of the two elastic elements are both connected with the second shell.

Optionally, the limiting assembly further includes: the first ends of the two connecting rods are respectively connected with the second ends of the two elastic elements, and the second ends of the two connecting rods are connected with the second shell.

Optionally, the elastic element is an extension spring.

Optionally, the display device further includes: and the tensioning assembly is connected with the first shell and is connected with one side of the curled display substrate, which is away from the planar display substrate.

Optionally, the tensioning assembly includes: a guide shaft and a tension belt;

one end of the tensioning belt is fixedly connected with one side, away from the plane display substrate, of the curled display substrate, and the other end of the tensioning belt bypasses the guide shaft and is fixedly connected with the first shell.

Optionally, the display device further includes: the driving motor is fixed on the first shell, and the transmission assembly is respectively connected with the driving motor and the second shell;

wherein the drive motor is configured to: the second shell is driven to slide in a direction deviating from the first shell or slide in a direction approaching the first shell through the transmission assembly.

The beneficial effects that technical scheme that this application embodiment provided include at least:

a display device, comprising: the flexible display panel, first casing, second casing, reel and spacing subassembly. The first limiting piece and the limiting assembly are arranged in the winding drum, and the first limiting piece can be clamped with the second limiting piece in the limiting assembly. When the display device is impacted, the second shell moves towards the direction of the first shell, and the center rod in the limiting assembly is kept motionless under the inertia effect due to the elastic element arranged in the limiting assembly. Therefore, at the moment of impact, the center rod in the limiting assembly moves towards the inner wall of the winding drum, which is close to the first limiting piece, so that the second limiting piece sleeved on the third center rod is clamped with the first limiting piece, the rotating speed of the winding drum can be greatly slowed down at the moment of impact, the probability of separation of the winding drum and the curled display substrate is lower, the probability of damage caused by collision between the curled display substrate and the second shell is effectively reduced, and the service life of the display device is effectively prolonged.

Drawings

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

Fig. 1 is a schematic view of a display device provided in the related art;

FIG. 2 is a schematic cross-sectional view at A-A' shown in FIG. 1;

FIG. 3 is a schematic view of a display device according to the related art when impacted;

fig. 4 is a schematic structural diagram of a display device according to an embodiment of the present application;

FIG. 5 is a schematic cross-sectional view of a spool and stop assembly provided in an embodiment of the present application;

FIG. 6 is a schematic cross-sectional view of a reel of a display device according to an embodiment of the present disclosure when impacted;

FIG. 7 is a schematic cross-sectional view at B-B' shown in FIG. 6;

fig. 8 is a schematic structural diagram of a display device with a rolled display substrate according to an embodiment of the present disclosure;

fig. 9 is a schematic structural diagram of a rolled and curled display substrate of a display device according to an embodiment of the present disclosure;

FIG. 10 is a schematic view of a spool and a second stop member according to an embodiment of the present disclosure;

FIG. 11 is a schematic cross-sectional view of another spool and stop assembly provided in accordance with an embodiment of the present application;

fig. 12 is a schematic structural diagram of another display device according to an embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

In the related art, please refer to fig. 1 and 2, fig. 1 is a schematic view of a display device provided in the related art, and fig. 2 is a schematic cross-sectional view at A-A' shown in fig. 1. The display device 00 includes: a slide-scroll display 01, a first housing 02, a second housing 03 and a scroll 04.

The sliding roll display screen 01 is a flexible display panel, and the plane part of the sliding roll display screen 01 is fixedly connected with the first shell 02. The first housing 02 may provide a supporting force to the planar portion of the roll-up display screen 01.

The second housing 03 is slidably connected to the first housing 02. By applying a force to the second housing 03, sliding occurs between the first housing 02 and the second housing 03.

Both ends of the reel 04 are connected with the second housing 03, and the second housing 03 can rotate the reel 04. The outer wall of the reel 04 may be attached to the curled portion of the slider display 01, and the curled portion of the slider display 01 may apply a certain pressing force to the reel 04. Thus, when the scroll 04 rotates, the slide-scroll display screen 01 can be driven to be rolled or unrolled.

Thus, when the display device 00 needs to unwind the roll display screen 01, the user can apply a leftward acting force F1 to the second housing 03, the second housing 03 slides in a direction away from the first housing 02, and under the fitting effect of the curled portion of the roll display screen 01, the roll 04 is driven to rotate clockwise, so that the curled portion of the roll display screen 01 can be unwound, and the area of the display surface of the roll display screen 01 displayed in the display device 00 is increased. When the display device 00 needs to wind up the rolled display screen 01, the user can apply an acting force opposite to the acting force F1 to the second housing 03, the second housing 03 slides in a direction close to the first housing 02, and under the fitting effect of the rolled portion of the rolled display screen 01, the roller 04 is driven to rotate in a counterclockwise direction, so that the rolled portion of the rolled display screen 01 can be wound up, so that the area of the display surface of the rolled display screen 01 displayed in the display device 00 is reduced.

Referring to fig. 3, fig. 3 is a schematic diagram of a display device according to the related art when being impacted. When the display device 00 receives the impact force F2, the roller 04 is driven to rotate counterclockwise under the fitting effect of the curled portion of the slide roller display screen 01, and the roller 04 rotates at a higher rotation speed after receiving the impact force F2. However, the pressing force applied to the reel 04 by the curled portion of the roll display screen 01 is limited, and when the reel 04 rotates in the counterclockwise direction at a high speed, the reel 04 brings the curled portion of the roll display screen 01 to contract at a low speed, resulting in that the curled portion of the roll display screen 01 may be separated from the reel 04. As such, the portion of the curled portion of the rolled display 01 separated from the scroll 04 may collide with the second housing 03, resulting in the rolled display 01 being extremely vulnerable to damage, thereby resulting in a lower service life of the display device 00.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a display device according to an embodiment of the present application. The display device 000 may include: the flexible display panel 100, the first housing 200, the second housing 300, the drum 400, and the spacing assembly 500.

The flexible display panel 100 has a flat display substrate 101 and a curled display substrate 102. The flat display substrate 101 cannot be curled, and the curled display substrate 102 may be rolled up within the display device 000. Here, when the display device 000 is in the rolled state, display can be performed only by the flat display substrate 101; when the display device 000 is in the unfolded state, not only display can be performed by the flat display substrate 101, but also display can be performed by curling the display substrate 102.

The first case 200 is for supporting the flat display substrate 101. Here, the first housing 100 and the flat display substrate 101 are fixedly connected.

The second housing 300 is slidably coupled to the first housing 200, and the second housing 300 is capable of sliding relative to the first housing 200 by applying a force to the second housing 300.

Both ends of the winding drum 400 are connected with the second housing 300, and the inner wall of the winding drum 400 is provided with a first limiting piece 401, and the curled display substrate 102 is attached to the outer wall of the winding drum 400 after bypassing the winding drum 400. Thus, when the second housing 300 receives the force, the roller 400 can be driven to rotate under the attaching action of the curled display substrate 102, so that the curled display substrate 102 can be rolled or unrolled. Fig. 4 is a schematic diagram showing a structure of the display device 000 after the curled display substrate 102 is partially spread.

The stop assembly 500 may be located inside the spool 400, and for a clearer view of the structure of the stop assembly 500 in the spool 400, please refer to fig. 5, fig. 5 is a schematic cross-sectional view of a spool and stop assembly according to an embodiment of the present application. Both ends of the limiting assembly 500 are connected with the second housing 300, and the limiting assembly 500 includes: the device comprises a central rod 501, an elastic element 502 connected with the end of the central rod 501, and a second limiting piece 503 sleeved on the central rod 501.

Wherein the spacing assembly 500 is configured to: after the second housing 300 receives the impact force, the elastic element 502 drives the center rod 501 to move towards the inner wall of the spool 400, so that the first limiting member 401 and the second limiting member 503 are clamped.

In the embodiment of the present application, please refer to fig. 6 and 7, fig. 6 is a schematic cross-sectional view of a drum when the display device provided in the embodiment of the present application is impacted, and fig. 7 is a schematic cross-sectional view at B-B' shown in fig. 6. When the display device 000 is impacted, the second housing 300 receives an impact force, and the second housing 300 moves toward the first housing 200. At this time, since the elastic member 502 is provided in the stopper assembly 500, the center rod 501 in the stopper assembly 500 is kept stationary by inertia. Thus, at the moment of impact, the center rod 501 in the limiting assembly 500 moves toward the inner wall of the spool 400, so that the second limiting member 503 sleeved on the center rod 501 is clamped with the first limiting member 401. In this way, through the clamping effect of the second limiting piece 503 and the first limiting piece 401, the rotation speed of the winding drum 400 can be greatly slowed down at the moment of impact, so that the probability of separation of the winding drum 400 and the curled display substrate 102 is lower, the probability of damage caused by collision between the curled display substrate 102 and the second housing 300 is effectively reduced, and the service life of the display device 000 is effectively prolonged.

In summary, the display device provided in the embodiment of the present application includes: the flexible display panel, first casing, second casing, reel and spacing subassembly. The first limiting piece and the limiting assembly are arranged in the winding drum, and the first limiting piece can be clamped with the second limiting piece in the limiting assembly. When the display device is impacted, the second shell moves towards the direction of the first shell, and the center rod in the limiting assembly is kept motionless under the inertia effect due to the elastic element arranged in the limiting assembly. Therefore, at the moment of impact, the center rod in the limiting assembly moves towards the inner wall of the winding drum, which is close to the first limiting piece, so that the second limiting piece sleeved on the third center rod is clamped with the first limiting piece, the rotating speed of the winding drum can be greatly slowed down at the moment of impact, the probability of separation of the winding drum and the curled display substrate is lower, the probability of damage caused by collision between the curled display substrate and the second shell is effectively reduced, and the service life of the display device is effectively prolonged.

At the moment when the display device 000 is impacted, the elastic element can move the center rod near the inner wall of the drum, so that the first limiting member 401 and the second limiting member 503 are clamped, and the rotation speed of the drum 400 can be greatly reduced. After the display device 000 is impacted, the elastic element 502 is returned to the initial state in a rebound manner, so as to drive the center rod 501 to return to the initial position (i.e. make the center shaft of the center rod 501 coincide with the axis of the drum), so that the first limiting member 401 and the second limiting member 503 are disengaged from each other. In this way, the clamping relationship between the first limiting member 401 and the second limiting member 503 is not required to be manually released, so that after the display device 000 is impacted, the first housing 200 and the second housing 300 can still slide normally, so that the curled display substrate 102 can still be rolled up or unrolled normally.

In this application, please refer to fig. 8 and fig. 9, fig. 8 is a schematic structural diagram of a display device with a rolled display substrate provided in an embodiment of the present application, and fig. 9 is a schematic structural diagram of a display device with a rolled display substrate provided in an embodiment of the present application. The display device 000 further includes: and a tension assembly 600, the tension assembly 600 being connected with the first housing 200 and with a side of the curled display substrate 102 facing away from the flat display substrate 101. Here, the tension assembly 600 may allow the roll display substrate 102 to apply a certain pressing force to the roll 400, so that the roll display substrate 102 may be rolled or unrolled under the cooperation of the tension assembly 600 and the roll 400.

In an embodiment of the present application, the tensioning assembly 600 may include: a guide shaft 601 and a tension band 602.

The guide shaft 601 is fixed within the display device 000 and can slide within the display device 000.

One end of the tension band 602 is fixedly connected with one side of the curled display substrate 102 away from the flat display substrate 101, and the other end of the tension band 602 bypasses the guide shaft 601 and is fixedly connected with the first housing 200. By way of example, one end of the tension band 602 is bonded to the side of the curled display substrate 102 facing away from the flat display substrate 101 by a pressure sensitive adhesive, and the tension band 602 is bonded to only a portion of the side of the curled display substrate 102 facing away from the flat display substrate 101, so that the tension assembly 600 can be ensured to wind up or unwind the curled display substrate 102. The other end of the tension band 602 is fixedly coupled to the first housing 200 by a snap screw.

In this case, since the guide shaft 601 in the tension assembly 600 can move within the display device 000. Therefore, when one side of the curled display substrate 102 facing away from the flat display substrate 101 is fixed with the tension band 602 and the other end of the tension band 602 is fixed with the first housing 200 by bypassing the guide shaft 601, the tension band 602 always tightens the curled display substrate 102, so that the curled display substrate 102 always applies a pressing force to the reel 400.

Thus, as shown in fig. 8, when the second housing 300 slides in a direction away from the first housing 200, the second housing 300 may drive the guide shaft 601 to move in a direction approaching the drum 400 through the drum 400, the curl display substrate 102 and the tension belt 602, so that the curl display substrate 102 between the guide shaft 601 and the drum 400 may be transferred between the drum 400 and the first housing 200 by rotating the drum 400, and further the curl display substrate 102 in the display device 000 is unfolded.

As shown in fig. 9, when the second housing 300 slides in a direction approaching the first housing 200, the second housing 300 may drive the guide shaft 601 to move away from the reel 400 through the reel 400, the curled display substrate 102 and the tension band 602, so that the curled display substrate 102 between the reel 400 and the first housing 200 may be transferred between the guide shaft 601 and the reel 400 by rotating the reel 400, and further the curled display substrate 102 in the display device 000 is wound up.

It should be noted that the movement principle of the tensioning assembly 600 is similar to the movement principle of a pulley. For example, the guide shaft 601 in the tensioning assembly 600 is equivalent to a movable pulley in the pulley block, and the guide shaft 601 and the tensioning belt 602 in the tensioning assembly 600 are equivalent to a connecting rope in the pulley block for connecting the movable pulley.

Alternatively, the tensioning belt 602 may be made of Polyimide (english: polyimide: PI), and in other possible implementations, the tensioning belt 602 may also be made of other flexible materials, which is not limited in this application.

In the present embodiment, as shown in fig. 7, the first stopper 401 includes a plurality of protrusions 401a distributed around a circumferential array within the spool 400, and the second stopper 503 includes a plurality of claws 503a distributed around the axial line of the center rod 501. When not impacted, gaps exist between the plurality of claws 503a in the second limiting member 503 and the plurality of protrusions 401a in the first limiting member 401.

When the end of the claw 503a facing away from the center rod 501 is located between two adjacent protrusions 401a and abuts against the protrusions 401a, the first limiting member 401 is clamped with the second limiting member 503.

In this embodiment, when the display device 000 is impacted, at the moment of impact, the center rod 501 in the limiting assembly 500 moves toward the inner wall of the drum 400, so that the claw 503a in the second limiting member 503 sleeved on the center rod 501 moves close to the plurality of protrusions 401a in the drum 400, and further, a part of the claw 503a facing away from the end of the center rod 501 is located between two adjacent protrusions 401a in the drum 400. In this case, a portion of the claw 503a facing away from the end of the center rod 501 may abut against the protrusion 401a, so that the first stopper 401 is engaged with the second stopper 503, and thus the rotational speed of the spool 400 is rapidly reduced at the moment of impact.

It should be noted that, after the portion of the claw 503a facing away from the end of the center rod 501 may be completely abutted against the protrusion 401a, the rotational speed of the spool 400 may be reduced to zero, and the spool 400 stops rotating. In this manner, the protection of the curled display substrate 102 in the display device 000 by the spacing assembly 500 is completed.

In this application, the protrusion 401a in the first stopper 401 is a ratchet tooth, and the tooth shape of the ratchet tooth is any one of an asymmetric triangle, an asymmetric circular arc, and an asymmetric trapezoid. Here, the shape of the claw 503a may be an asymmetric shape identical to the shape of the protrusion 401 a. And, a portion of the claw 503a facing away from the end of the center lever 501 is equal to or less than a distance between the two protrusions 401a in the first stopper 401, so that a portion of the claw 503a facing away from the end of the center lever 501 can abut one of the two protrusions 401 a.

The plurality of protrusions 401a in the first stopper 401 and the spool 400 may be integrally formed or may be separately assembled, which is not limited in this application.

In the embodiment of the present application, please refer to fig. 10, fig. 10 is a schematic structural diagram of a spool and a second limiting member according to the embodiment of the present application. The reel 400 in the display device 000 is configured to: when the second housing 300 slides in a direction away from the first housing 200, the second housing rotates around the first direction R1 to drive the curled display substrate 102 to be unfolded; when the second housing 300 slides in a direction approaching the first housing 200, the second housing rotates around the second direction R2 to drive the curled display substrate 102 to wind up. In this application, the first direction R1 may be a clockwise direction, the second direction R2 may be a counterclockwise direction, and in other possible implementations, the first direction R1 may be a counterclockwise direction, and the second direction R2 may be a clockwise direction.

Wherein, when the end of the pawl 503a facing away from the center rod 501 is located between the first protrusion 4011 and the second protrusion 4012, the end of the pawl 503a facing away from the center rod 501 abuts against the second protrusion 4012, the first protrusion 4011 and the second protrusion 4012 are any two adjacent protrusions 401a of the plurality of protrusions 401a, and the first protrusion 4011 and the second protrusion 4012 are distributed around the first direction R1. Here, when the first direction R1 is opposite to the second direction R2, the end of the claw 503a facing away from the center rod 501 can abut one of any two adjacent projections 401 a.

In this embodiment, when the display device 000 is impacted, the reel 400 still rotates around the second direction R2 under the fitting action of the curled display substrate 102, and the central rod 501 moves toward the inner wall of the reel 400, so that the claw 503a in the second limiting member 503 faces away from the end of the central rod 501 and is located between the adjacent first protrusion 4011 and second protrusion 4012 in the reel 400. In order to ensure that the end of the pawl 503a facing away from the central rod 501 can abut against the first stop 401, the rotational speed of the spool 400 is greatly slowed down. It is necessary to ensure that the first and second projections 4011, 4012 in the first stop 401 are distributed about the first direction R1 and that the first direction R1 is opposite to the second direction R2 so that the end of the pawl 503a facing away from the central rod 501 can abut the second projection 4012.

In this application, the limiting assembly 500 has various structures, and the following two alternative implementations are taken as examples for illustrative purposes in this application:

a first alternative implementation is shown in fig. 5. The number of the elastic elements 502 is two, and the first ends of the two elastic elements 502 are respectively connected with two ends of the central rod 501, and the second ends of the two elastic elements 502 are both connected with the second shell 300. Here, the center rod 501 is located at the center of the drum 400, and the first end of the elastic member 502 is connected to the center rod 501, and the elastic member 502 is also located at the center of the drum 400.

In this case, no matter the display device 000 receives impact force from that direction, the two elastic elements 502 can drive the central rod 501 to move towards the inner wall of the drum 400, which is close to the first limiting part 401, in each direction, and the end part of the second limiting part 503 sleeved on the central rod 501, which is away from the central rod 501, can be abutted against the protrusion 401a, so that the first limiting part 401 and the second limiting part 503 are ensured to be clamped. That is, no matter from which direction the display device 000 falls, the display device 000 can trigger the setting of the first limiting member 401 and the second limiting member 503 to be clamped, so as to protect the curled display substrate 102. Here, one elastic element 502 is disposed at each end of the center rod 501, and the two elastic elements 502 are spaced apart from the second limiting member 503 by the same distance. In this way, the first end of the elastic element 502 can drive the center rod 501 to move towards the inner wall of the drum 400, which is close to the first limiting part 401, in the same moving direction, and the distance between the elastic elements 502 on two sides of the second limiting part 503, which drives the center rod 501 to move, is the same, so that the clamping effect of the second limiting part 503 and the first limiting part 401 is better.

Referring to fig. 11, fig. 11 is a schematic cross-sectional view of another spool and stop assembly according to an embodiment of the present application. The spacing assembly 500 further includes: the first ends of the two connecting rods 504 are respectively connected with the second ends of the two elastic elements 502, and the second ends of the two connecting rods 504 are connected with the second housing 300. Here, both the connecting rod 504 and the central rod 501 are located in the center of the spool 400, as is the elastic element 502.

In this case, no matter the display device 000 receives impact force from that direction, the two elastic elements 502 can also drive the central rod 501 to move towards the inner wall of the drum 400, which is close to the first limiting part 401, in each direction, and the end part of the second limiting part 503 sleeved on the central rod 501, which is away from the central rod 501, can be abutted against the protrusion 401a, so that the first limiting part 401 and the second limiting part 503 are ensured to be clamped. That is, no matter from which direction the display device 000 falls, the display device 000 can trigger the setting of the first limiting member 401 and the second limiting member 503 to be clamped, so as to protect the curled display substrate 102. Here, two connection rods 504 are distributed at both sides of the second limiting member 503, and the two connection rods 504 are spaced apart from the second end connected to the elastic member 502 by the same distance. In this way, the first ends of the elastic elements 502 can drive the center rod 501 to move towards the inner wall of the drum 400, which is close to the first limiting part 401, in the same moving direction, and the distances of the two elastic elements 502 connected with the first ends of the two connecting rods 504, which drive the center rod 501 to move, are the same, so that the clamping effect of the second limiting part 503 and the first limiting part 401 is better.

It should be noted that, on the premise of ensuring that the clamping effect of the second limiting member 503 and the first limiting member 401 is good, the number and positions of the connecting rod 504 and the elastic member 502 may have various combinations. For example, both connecting rods 504 may be split and a resilient member 502 may be provided at the split position of the connecting rods 504. Thus, the limiting assembly 500 may further include: four elastic elements 502, four connecting rods 504. The present application is not limited in this regard.

For both of the above alternative implementations, the resilient element 502 in the stop assembly 500 is a tension spring. In order to ensure that the display device 000 is not deviated from the center of the drum 400 during use, the second limiting member 503 is deviated from the center of the drum 400, so that the clamping effect of the second limiting member 503 and the first limiting member 401 is poor, and the stiffness coefficient of the spring needs to be constrained to a certain extent.

In embodiments of the present application, the stiffness coefficient of the spring may be defined according to a relationship between the magnitude of the tension of the spring and the stiffness coefficient. Here, the relationship between the tension and stiffness coefficients of the elastic element 502 can be represented by the formula: f (F) ₄₀₂₂ Kx, (k: stiffness coefficient, x: elongation). For example, if the size of the display device 000 is determined, the size of the drum 400 may also be determined, so the elongation is a fixed value. Then, according to the formula of the principle of conservation of momentum, the tension of the elastic element 502 may be represented by the formula: f (F) ₄₀₂₂ t=mv, (t: time, m: mass, v: velocity). Thus, F can be obtained according to the time of landing the display device 000, the quality of the display device 000 and the speed of landing the display device 000 ₄₀₂₂ Which in turn gives the stiffness coefficient of the elastic element 502.

In this application, please refer to fig. 12, fig. 12 is a schematic structural diagram of another display device according to an embodiment of the present application. The display device 000 may further include: the driving motor 700 and the transmission assembly 800, the driving motor 700 is fixed on the first housing 200, and the transmission assembly 800 is connected with the driving motor 700 and the second housing 300, respectively. Here, the transmission assembly 800 may be a transmission-capable structure composed of various pulleys and pulleys, so that the driving motor 700 may slide the second housing 300 with respect to the first housing 200 through the transmission assembly 800. The transmission assembly 800 is, for example, a rack and pinion transmission mechanism, or may be a lead screw nut transmission mechanism, which is not limited in this embodiment.

Wherein the drive motor 700 is configured to: the second housing 300 is driven to slide in a direction away from the first housing 200 or in a direction approaching the first housing 200 by the transmission assembly 800.

In the embodiment of the application, when the driving motor 700 drives the second housing 300 to slide in a direction away from the first housing 200 through the transmission assembly 800, the second housing 300 drives the guide shaft 601 to slide in a direction close to the reel 400, and the reel 400 rotates around the first direction R1 under the attaching action of the curled display substrate 102, so that the curled display substrate 102 in the display device 000 is unfolded; when the driving motor 700 drives the second housing 300 to slide in a direction approaching the first housing 200 through the transmission assembly 800, the second housing 300 drives the guide shaft 601 to slide in a direction away from the roller 400, and the roller 400 rotates around the second direction R2 under the bonding action of the curled display substrate 102, so that the curled display substrate 102 in the display device 000 is rolled up.

It is noted that in the drawings, the size of layers and regions may be exaggerated for clarity of illustration. Moreover, it will be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element or intervening layers may be present. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element or intervening layers or elements may be present. In addition, it will be understood that when a layer or element is referred to as being "between" two layers or elements, it can be the only layer between the two layers or elements, or more than one intervening layer or element may also be present. Like reference numerals refer to like elements throughout.

In this application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" refers to two or more, unless explicitly defined otherwise.

The foregoing description of the preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, since it is intended that all modifications, equivalents, improvements, etc. that fall within the spirit and scope of the invention.

Claims

1. A display device, comprising:

a first housing for supporting the flat display substrate;

a second housing slidably coupled to the first housing;

2. The display device of claim 1, wherein the first stop comprises a plurality of protrusions distributed about a circumferential array within the spool, and the second stop comprises a plurality of jaws distributed about an axis of the center rod;

3. The display device of claim 2, wherein the spool is configured to: when the second shell slides in a direction deviating from the first shell, the second shell rotates around a first direction to drive the curled display substrate to be unfolded;

4. A display device according to claim 3, wherein the protrusions are ratchet teeth having any one of an asymmetric triangle, an asymmetric circular arc and an asymmetric trapezoid.

5. The display device according to claim 1, wherein the number of the elastic elements is two, and first ends of the two elastic elements are respectively connected to two ends of the center rod, and second ends of the two elastic elements are respectively connected to the second housing.

6. The display device of claim 5, wherein the spacing assembly further comprises: the first ends of the two connecting rods are respectively connected with the second ends of the two elastic elements, and the second ends of the two connecting rods are connected with the second shell.

7. A display device according to claim 5 or 6, wherein the elastic element is a tension spring.

8. The display device according to any one of claims 1 to 6, characterized in that the display device further comprises: and the tensioning assembly is connected with the first shell and is connected with one side of the curled display substrate, which is away from the planar display substrate.

9. The display device of claim 8, wherein the tensioning assembly comprises: a guide shaft and a tension belt;

10. The display device according to any one of claims 1 to 6, characterized in that the display device further comprises: the driving motor is fixed on the first shell, and the transmission assembly is respectively connected with the driving motor and the second shell;