CN114694486A

CN114694486A - Flexible display device

Info

Publication number: CN114694486A
Application number: CN202011588890.4A
Authority: CN
Inventors: 赵勇
Original assignee: TCL Technology Group Co Ltd
Current assignee: TCL Technology Group Co Ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2022-07-01

Abstract

The invention is suitable for the technical field of display, and provides a flexible display device which comprises a flexible screen, a shell, a driving mechanism and a curling mechanism. The driving mechanism comprises a driving assembly arranged in the shell and a moving shaft connected with the driving end of the driving assembly, and the moving shaft extends out of the shell and is connected with the first side edge of the flexible screen; the crimping mechanism includes a crimping assembly and a spool coupled to a drive end of the crimping assembly, the spool coupled to the second side of the flexible screen. According to the flexible display device provided by the invention, the driving assembly drives the moving shaft to move towards the scroll or move away from the scroll, the curling assembly is used for driving the scroll to rotate when the moving shaft is close to or away from the scroll, the scroll can wrap or unwind the scroll through the rotation of the scroll, and the automatic curling and unwinding of the flexible screen are realized; the driving assembly is arranged in the shell, and two side edges of the flexible screen are respectively connected with the movable shaft and the scroll, so that the occupied space is small, and the whole body is attractive.

Description

Flexible display device

Technical Field

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

Background

With the rapid development of flexible display technologies such as Organic Light-Emitting diodes (OLEDs), flexible display devices will become the mainstream of screen display in the future. The flexible screen equipment is used in various modes, the scroll type flexible screen can be bent at will, and the flexible screen is wound and contracted on the scroll, so that the flexible screen equipment is convenient to carry and saves space.

However, the existing flexible screen equipment adopts manual curling, and the operation is complex. Some flexible screen equipment can realize automatic expansion and curl, but this flexible screen equipment's driving source directly sets up in the side of flexible screen, and occupation space is big, seems comparatively heavy, and is not pleasing to the eye.

Disclosure of Invention

The embodiment of the invention aims to provide a flexible display device to solve the technical problems that a driving source of the conventional flexible screen equipment is directly arranged beside a flexible screen, occupies a large space and is not attractive.

In order to achieve the purpose, the invention adopts the technical scheme that: there is provided a flexible display device including:

a housing;

the flexible screen is provided with a first side edge and a second side edge which are oppositely arranged;

one end of the driving mechanism is connected to the shell, the driving mechanism comprises a driving assembly arranged in the shell and a moving shaft connected with the driving end of the driving assembly, and the moving shaft is connected with the first side edge of the flexible screen; and

a crimping mechanism having one end connected to the housing, the crimping mechanism including a crimping assembly and a spool connected to a drive end of the crimping assembly, the spool connected to a second side of the flexible screen;

the driving assembly is used for driving the moving shaft to move close to or far away from the reel, and the curling assembly is used for driving the reel to rotate when the moving shaft is close to or far away from the reel so as to realize the unfolding and folding of the flexible screen.

Optionally, the crimping assembly comprises:

the supporting seat is fixedly connected with the shell;

the fixed box is arranged on the supporting seat and is rotationally connected with the supporting seat, and the scroll is fixedly connected to the fixed box; and

and the coil spring is wound in the fixed box, the inner side end of the coil spring is connected with the supporting seat, and the outer side end of the coil spring is connected with the fixed box.

Optionally, the support seat comprises:

the seat body part is fixedly connected with the shell; and

the axial region, set up in deviating from of seat body portion one side of casing, and with seat body portion connects, the cover is equipped with in proper order on the axial region fixed box with the spool, the medial extremity of coil spring with the axial region is connected, and the duplex winding the axial region is around rolling up.

Optionally, the axial region is provided with a through hole groove which runs through the axial wall of the axial region along the radial direction of the axial region, the inner side end of the scroll is sequentially connected with a first penetrating portion and a fixing portion, the first penetrating portion penetrates through the through hole groove, and the fixing portion is wound on the outer peripheral wall of the axial region and connected with the axial region. .

Optionally, the fixing box comprises:

the box body part is arranged on the supporting seat; and

a support portion provided in the case portion, located between an inner wall of the case portion and the coil spring, and extending toward the reel, a gap being formed between the support portion and the case portion;

the outer side end of the coil spring is sequentially connected with a second penetrating part, and the second penetrating part is fixedly arranged in the gap in a penetrating mode.

Optionally, the fixing box further comprises:

the first fixing lug is connected with the outer side wall of the box body part;

the reel includes:

a sleeve portion sleeved on the shaft portion; and

and a second fixing lug connected to an outer peripheral wall of the sleeve portion, the second fixing lug being connected to the first fixing lug.

Optionally, a sliding groove is formed in the shell, and the moving shaft extends into the sliding groove and is connected with the driving assembly.

Optionally, the drive assembly comprises:

a motor;

the lead screw module is in transmission connection with the output end of the motor; and

the sliding table is connected with the lead screw module in a sliding mode and connected with the moving shaft.

Optionally, the drive assembly further comprises:

the motor driver is arranged in the shell and used for driving the motor to rotate; and

and the motor controller is in communication connection with the motor driver.

Optionally, the drive assembly further comprises:

the position sensor is arranged on the lead screw module and is close to the curling assembly; and

and the position sensing piece is arranged on the sliding table and is in communication connection with the motor controller.

Optionally, the flexible screen comprises:

a main body part for displaying a screen;

a first main plate portion having a first side electrically connected to the main body portion and a second side fixedly connected to the movable shaft; and

the first side of the second main board part is electrically connected with the main body part, and the second side of the second main board part is fixedly connected with the reel.

Optionally, a display controller is arranged on the flexible screen, the display controller is in communication connection with the motor controller, and the display controller can calculate the position of the moving shaft according to a signal received from the motor controller so as to control the display area of the flexible screen to be matched with the expansion area of the flexible screen.

The flexible display device provided by the invention has the beneficial effects that: compared with the prior art, on one hand, the driving assembly drives the moving shaft to move towards the scroll or move away from the scroll, the curling assembly drives the scroll to rotate when the moving shaft is close to or away from the scroll, the scroll can wrap the scroll or unwind the scroll through the rotation of the scroll, and the automatic curling and unwinding of the flexible screen are realized; on the other hand, set up drive assembly in the casing, the both sides limit of flexible screen is connected with removal axle and spool respectively, and occupation space is less, and is whole pleasing to the eye, has solved current set up the driving source in the side of flexible screen, and occupation space is great, not aesthetic technical problem.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic perspective view of a flexible display device according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a flexible display device according to an embodiment of the present invention;

fig. 3 is an exploded schematic view of a flexible display device according to an embodiment of the present invention;

fig. 4 is a schematic perspective view of a flexible display device provided in an embodiment of the present invention, with an upper cover, a decorative cover, and a middle frame removed;

fig. 5 is a schematic top view illustrating a flexible display device provided in an embodiment of the present invention, with an upper cover, a decoration cover and a middle frame removed;

FIG. 6 is a schematic cross-sectional view taken along line A-A of FIG. 5;

FIG. 7 is a first schematic cross-sectional view of a crimping mechanism according to an embodiment of the present invention;

FIG. 8 is a partial enlarged structural view of the portion A in FIG. 7;

FIG. 9 is a second cross-sectional view of a crimping mechanism according to an embodiment of the present invention;

FIG. 10 is a schematic perspective view of a crimping mechanism according to an embodiment of the present invention with the spool housing and the spool removed;

FIG. 11 is an exploded view of the crimping mechanism provided in accordance with an embodiment of the present invention with the spool sleeve and spool removed;

FIG. 12 is a schematic cross-sectional view of a crimping mechanism with the spool sleeve and spool removed according to an embodiment of the present invention;

fig. 13 is a partially enlarged structural view of a portion B in fig. 12;

fig. 14 is a schematic perspective view of a reel provided in an embodiment of the present invention;

fig. 15 is a first perspective view of a fixing box according to an embodiment of the present invention;

fig. 16 is a schematic perspective view of a second fixing box according to an embodiment of the present invention;

fig. 17 is a schematic perspective view of a flexible display device provided in an embodiment of the present invention, with a housing removed;

FIG. 18 is a schematic side view of a flexible display device with a removable housing according to an embodiment of the present invention;

fig. 19 is an exploded view of a flexible display device with a housing removed according to an embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

1-a shell; 10-a chute; 11-a base plate; 12-middle frame; 13-upper cover; 14-a decorative cover; 2-a flexible screen; 21-a main body portion; 22-a first main plate portion; 23-a second main plate portion; 3-a drive mechanism; 31-a moving axis; 32-a drive assembly; 321-a motor; 322-lead screw module; 323-a slide table; 324-a motor drive; 325-motor controller; 326-position sensor; 327-position sensing tab; 33-moving the sleeve; 4-a crimping mechanism; 41-reel; 411-a sleeve portion; 412-a second securing ear; 42-a crimping assembly; 421-a support seat; 4210-threaded hole; 4211-a seat body part; 4212-shaft part; 4213-through hole groove; 422-fixing box; 4220-winding mounting hole; 4221-a cassette part; 4222-a support; 4223-a first fixing ear; 4224-bump; 4225-a through hole; 4226-gap; 4227-a first gap; 4228-a second gap; 4229-third gap; 423-coil spring; 4231-a first penetration part; 4232-anchoring part; 4233-a second penetration part; 4234-first stage; 4235-second stage; 4236-third stage; 424-coil spring cover plate; 43-winding shaft sleeve; 44-spool sleeve; h1-wall thickness of the circumferential side wall of the through hole of the mounting box.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" 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" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1 and fig. 2 together, a flexible display device according to an embodiment of the present invention will be described. The flexible display device enables the flexible screen 2 to be automatically opened and rolled up like a scroll comprises the flexible screen 2, a housing 1, a driving mechanism 3 and a curling mechanism 4. With further reference to fig. 3 and 4, the flexible screen 2 is disposed on the housing 1, and the flexible screen 2 has a first side and a second side that are disposed oppositely; one end of the driving mechanism 3 is connected to the housing 1, and the driving mechanism 3 includes a moving shaft 31 disposed on the driving assembly 32 and connected to the driving end of the driving assembly 32, and the moving shaft 31 is connected to the first side of the flexible screen 2; one end of the curling mechanism 4 is connected to the shell 1, the curling mechanism 4 comprises a curling component 42 and a scroll 41 connected with the driving end of the curling component 42, and the scroll 41 extends out of the shell 1 and is connected with the second side edge of the flexible screen 2; the driving assembly 32 is used for driving the moving shaft 31 to move towards or away from the winding shaft 41, and the curling assembly 42 is used for driving the winding shaft 41 to rotate when the moving shaft 31 approaches or leaves the winding shaft 41, so that the flexible screen 2 can be wrapped or unfolded on the winding shaft 41 along with the rotation of the winding shaft 41, namely, the flexible screen 2 is folded and unfolded. The specific working principle is as follows:

when the flexible screen 2 needs to be unfolded, the driving assembly 32 drives the moving shaft 31 to move in a direction away from the scroll 41, because the moving shaft 31 is connected with the first side edge of the flexible screen 2, and the second side edge of the flexible screen 2 is connected with the scroll 41, when the driving force of the driving assembly 32 is greater than the automatic winding force of the winding assembly 42, the flexible screen 2 is pulled away by the driving assembly 32, the winding assembly 42 is driven to rotate, the winding assembly 42 rotates to drive the scroll 41 to rotate, and along with the rotation of the scroll 41, the flexible screen 2 can be unfolded;

when the flexible screen 2 needs to be rolled, the driving assembly 32 drives the moving shaft 31 to move towards the reel 41, at this time, the flexible screen 2 does not have the pulling force of the driving assembly 32, and under the pushing force of the driving assembly 32, the rolling assembly 42 has a certain restoring force and can drive the reel 41 to rotate, and the reel 41 rotates, so that the flexible screen 2 is wound on the reel 41.

Compared with the prior art, on one hand, the driving assembly 32 drives the moving shaft 31 to move towards the scroll 41 or move away from the scroll 41, the curling assembly 42 is used for driving the scroll 41 to rotate when the moving shaft 31 is close to or away from the scroll 41, the scroll 41 rotates to enable the flexible screen 2 to wrap the scroll 41 or unwind the scroll 41, and automatic curling and unwinding of the flexible screen 2 are realized; on the other hand, set up drive assembly 32 in casing 1, the both sides limit of flexible screen 2 is connected with removal axle 31 and spool 41 respectively for drive assembly 32's occupation space is less, and is whole comparatively pleasing to the eye, has solved current set up the driving source in the side of flexible screen 2, and occupation space is great, not aesthetic technical problem.

Specifically, with reference to fig. 3, 7 and 9, the housing 1 is provided with a sliding slot 10, and an end of the moving shaft 31 extends into the sliding slot 10 and is connected to the driving assembly 32. The housing 1 includes a bottom plate 11, a center frame 12, an upper cover 13, and a decorative cover 14. Wherein, drive assembly 32 and curling subassembly 42 all set up on bottom plate 11, and center 12 sets up on bottom plate 11 to form with bottom plate 11 and hold the chamber, upper cover 13 lid is located on center 12, decorates lid 14 and covers on upper cover 13. The driving mechanism 3 further includes a moving sleeve 33 sleeved on the moving shaft 31, and an opening is formed on the moving sleeve 33, through which the flexible screen 2 passes and is connected with the moving shaft 31. The winding mechanism 4 further comprises a winding shaft sleeve 43 and a winding shaft sleeve 44, the winding shaft sleeve 43 is sleeved on the winding shaft 41, an opening is formed in the winding shaft sleeve 43, and the flexible screen 2 passes through the opening in the winding shaft sleeve 43 and is connected with the winding shaft 41. The winding shaft sleeve 44 is sleeved on one end of the winding shaft 41 far away from the shell 1 and is rotatably connected with the winding shaft 41. The movable sleeve 33 and the scroll sleeve 43 have certain functions of shielding the flexible screen 2, and are attractive.

In another embodiment of the present invention, referring to fig. 5 to 7, the curling element 42 includes a supporting base 421, a fixing box 422 and a coil spring 423. Wherein, the supporting seat 421 is fixedly connected with the casing 1; the fixing box 422 is arranged on the supporting seat 421, and is connected with the supporting seat 421 to be connected with the reel 41 fixedly on the fixing box 422; the coil spring 423 is wound in the fixed box 422, the inner end of the coil spring 423 is connected with the supporting seat 421, the coil spring 423 is wound around the axis of the supporting seat 421 as a center line, namely, is wound into a spiral coil spring 423, and after the coil spring 423 is wound, the outer end of the coil spring 423 is connected with the fixed box 422.

Specifically, with further reference to fig. 9 to 11, the spiral coil spring 423 designs parameters such as the outer diameter of the coil spring 423, the forward and backward coils, the thickness of the material of the coil spring 423, the width of the material of the coil spring 423, and the number of coils of the coil spring 423 according to the tension that the flexible screen 2 can bear, and the like, and in this embodiment, the coil spring 423 is reversely wound by 12 coils, the outermost end of the coil spring 423 is connected to the fixed box 422, and the coil spring 423 is installed in the fixed box 422 in the clockwise tightening direction, and the fixed box 422 is rotated clockwise by three coils to store the tightening force of the coil spring 423, and the coil installation hole 4220 on the fixed box 422 is fixed on the threaded hole 4210 on the supporting seat 421 by a screw. When the flexible screen 2 curtain winding device works, the screws on the winding mounting holes 4220 on the fixed box 422 are taken down, so that the scroll coil springs 423 provide constant winding torque, the fixed box 422 can be driven to rotate anticlockwise, the fixed box 422 rotates to drive the reel 41 to rotate anticlockwise together, and the flexible screen 2 curtain is automatically wound on the reel 41. The specific working principle is as follows:

the movable shaft 31 is pulled by the driving assembly 32 to drive the zero position of the flexible screen 2 to move to the maximum unfolding position, wherein the position of the movable shaft 31 close to the reel 41 is the zero position, wherein the pulling force of the driving assembly 32 on the flexible screen 2 is greater than the automatic winding force of the coil spring 423, so that the flexible screen 2 is pulled away by the driving assembly 32, after the flexible screen 2 is unfolded for a short time preset at the maximum unfolding position, the movable shaft 31 moves towards the zero position, namely, moves towards the direction close to the reel 41 under the driving of the driving assembly 32, and because the flexible screen 2 is not pulled by the driving assembly 32, the flexible screen 2 is automatically wound onto the reel 41 under the winding force of the coil spring 423 and returns to the zero position.

Further, in this embodiment, the radius of the winding shaft 41 is designed according to the radius of the flexible screen 2 which can be wound, wherein the radius of the winding shaft 41 is between 15mm and 25mm, and in a specific application, the radius of the winding shaft 41 is 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm or 25 mm. Preferably 20mm, so that the flexible screen 2 is wound three turns onto the reel 41.

In another embodiment of the present invention, referring to fig. with further reference to fig. 12, 13 and 15, the supporting seat 421 includes a seat body portion 4211 and a shaft portion 4212. The seat portion 4211 is a bent member, the middle portion of the seat portion 4211 is disposed on the driving assembly 32, and both ends of the seat portion are bent and then fixedly connected to the housing 1. The shaft portion 4212 is disposed on one side of the seat portion 4211 away from the housing 1 and connected to the seat portion 4211, the shaft portion 4212 is sequentially sleeved with the fixing box 422 and the reel 41, that is, the fixing box 422 is disposed on the seat portion 4211, the reel 41 is disposed on the fixing box 422, the fixing box 422 is provided with a through hole 4225 through which the shaft portion 4212 passes, and the reel 41 is a sleeve and is sleeved on the shaft portion 4212. The coil spring 423 is connected to the shaft portion 4212 at an inner end thereof, and is wound around the shaft portion 4212 as a center.

Specifically, referring to fig. 7, the shaft portion 4212 is provided with a through hole groove 4213 penetrating through the shaft wall of the shaft portion 4212 in the radial direction of the shaft portion 4212, the inner end of the coil spring 423 is connected to a first penetration portion 4231 and a fixing portion 4232 in this order, the first penetration portion 4231 is penetrated into the through hole groove 4213, and the fixing portion 4232 is wound around the outer peripheral wall of the shaft portion 4212 and connected to the shaft portion 4212. The coil spring 423 is prevented from being disengaged from the shaft portion 4212 in a process of pulling the coil spring 423 when the cartridge 422 rotates. Here, the inner end refers to an end close to the shaft portion 4212.

In another embodiment of the present invention, further referring to fig. 8 and 15, the fixing case 422 includes a case portion 4221 and a supporting portion 4222. Wherein, the box 4221 is disposed on the support 421, and the box 4221 is hollow for accommodating the coil spring 423; the support portion 4222 is disposed in the box portion 4221 and located between an inner wall of the box portion 4221 and the coil spring 423, the support portion 4222 is of a plate rib structure and extends toward the reel 41, a gap 4226 is formed between the support portion 4222 and the box portion 4221, an outer end of the coil spring 423 is connected with a second penetrating portion 4233, the second penetrating portion 4233 is fixedly penetrated in the gap 4226, and therefore the coil spring 423 is stably connected with the fixed box 422, and the fixed box 422 can be driven to rotate.

Specifically, the box portion 4221 has an accommodating groove therein, the support portion 4222 is disposed in the accommodating groove, the gap 4226 includes a first gap portion 4227, a second gap portion 4228 and a third gap portion 4229 which are sequentially communicated, a first gap portion 4227 is formed between a first sidewall of the support portion 4222 and a groove wall of the accommodating groove, a second gap portion 4228 is formed between an outer wall surface of the support portion 4222 and an inner wall surface of the accommodating groove, a third gap portion 4229 is formed between a second sidewall of the support portion 4222 and the groove wall of the accommodating groove, and the first gap portion 4227 and the third gap portion 4229 are disposed opposite to each other. The second penetrating portion 4233 comprises a first section 4234, a second section 4235 and a third section 4236 which are sequentially connected, wherein the first section 4234 is bent and extended towards the support portion 4222 from the outer end of the coil spring 423, the first section 4234 is arranged in the first gap portion 4227 in a penetrating mode, the second section 4235 is bent and extended towards the support portion 4222 from one end, far away from the coil spring 423, of the first section 4234, the second section 4235 is arranged in the second gap portion 4228 in a penetrating mode, the third section 4236 is bent and extended towards the support portion 4222 from one end, far away from the first section 4234, of the second section 4235 in a penetrating mode, and the third section 4236 is arranged in the third gap portion 4229 in a penetrating mode.

Further, referring to FIG. 11, the crimping assembly 42 also includes a coil spring cover 424 that covers the mounting box 422, the coil spring cover 424 cooperating with the mounting box 422 to prevent the ingress of dust or moisture and to provide an aesthetically pleasing appearance.

In another embodiment of the present invention, referring to fig. 13 to 15, the fixing box 422 further includes a first fixing ear 4223, the first fixing ear 4223 is connected to an outer sidewall of the box portion 4221 and extends in a direction away from the box portion 4221, the box portion 4221 is in a cylindrical structure, the number of the first fixing ears 4223 is multiple, and the multiple first fixing ears 4223 are spaced apart from each other along a circumferential direction of the box portion 4221. The spool 41 includes a sleeve portion 411 and a second fixing lug 412. Wherein, the sleeve portion 411 is sleeved on the shaft portion 4212; the second fixing lugs 412 are connected with the outer peripheral wall of the sleeve portion 411 and extend in a direction away from the sleeve portion 411, the number and distribution positions of the second fixing lugs 412 correspond to those of the first fixing lugs 4223, and the second fixing lugs 412 and the first fixing lugs 4223 are connected together by fixing members such as screws, so that the reel 41 can rotate along with the rotation of the fixing box 422.

Further, since the winding shaft 41 rotates together with the fixing box 422, the fixing box 422 is disposed on the seat portion 4211 of the supporting seat 421 and contacts with the supporting seat 421, in order to reduce the frictional resistance between the fixing box 422 and the supporting seat 421 when the fixing box 422 rotates, the fixing box 422 is made of a bearing material to reduce friction and noise, the bottom of the fixing box 422 extends toward the seat portion 4211 of the supporting seat 421, the protrusion 4224 surrounds the axis of the winding shaft 41, the longitudinal section of the protrusion 4224 is arc-shaped, so that the contact between the fixing box 422 and the seat portion 4211 is a circumferential line, when the flexible screen 2 is unfolded and wound, the fixing box 422 rotates clockwise and counterclockwise around the shaft portion 4212 of the supporting seat 421, at this time, only point contact is made between any vertical section of the fixing box 422 and the seat portion 4211, the advancing movement trajectory is point contact, and each point contact is connected tangentially in a smooth manner to form a circular ring trajectory, thereby minimizing frictional resistance to rotation of the caddy 422 on the seat portion 4211.

Specifically, with further reference to fig. 16, the number of the protrusions 4224 is plural, the protrusions 4224 are arranged at intervals along the radial direction of the fixing box 422, and the protrusions 4224 are concentrically arranged with respect to the through hole 4225 on the fixing box 422, and the plurality of uniformly arranged tracks enable the seat body 4211 to stably support the fixing box 422 to rotate, and friction resistance to the rotation of the fixing box 422 is extremely low, so that the rotation of the fixing box 422 is not affected, and the flexible screen 2 can be smoothly unfolded or rolled. The present embodiment preferably has four protrusions 4224.

Wherein, the height of the boss 4224 is 0.5mm-1.5mm, then the width of the boss 4224 is 1mm-3mm, the size of the boss 4224 is in the range, the friction is small, and the movement is smooth. When the size of the boss 4224 is too large, the number of turns of the boss 4224 is made too small, resulting in unstable movement; when the size of the boss 4224 is too small, it is not easy to process, and it is easy to deviate during rotation, which may cause surface contact. The distance between two adjacent bosses 4224 is 2mm-6mm, so that the movement is smooth. When the separation distance is too small, the number of turns of the boss 4224 is large, surface contact may be caused, and the friction force is large; when the separation distance is too large, the number of turns of the boss 4224 is small, resulting in uneven movement.

Further, a plurality of notches are formed in the end face, facing the seat portion 4211, of the protrusion 4224, and the notches are arranged at intervals along the circumferential direction of the protrusion 4124. Specifically, the included angle between adjacent notches ranges from 0 to 90 degrees, and in a specific application, the included angle between adjacent notches is 0 degree, 30 degrees, 45 degrees, 60 degrees or 90 degrees, which can be selected according to specific requirements.

Further, referring to fig. 12 to 15, the through hole 4225 at the center of the fixing box 422 is in clearance fit with the shaft portion 4212 of the supporting seat 421, the clearance between the through hole 4225 and the shaft portion 4212 of the supporting seat 421 is 0.02-0.07mm, and in a specific application, the clearance between the through hole 4225 and the shaft portion 4212 of the supporting seat 421 is 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.06mm or 0.07 mm. The gap in the embodiment is preferably 0.05mm, and the motion stability is better while the friction resistance is reduced. When the gap is large, the spool 41 may be shaken, resulting in unstable rotation of the spool 41, and when the gap is small, the spool 41 may be caught, resulting in poor transmission.

The wall thickness H1 of the circumferential side wall of the through hole 4225 of the securing box 422 is between 1.7-2.7mm, and in a particular application, the wall thickness H1 of the circumferential side wall of the through hole 4225 of the securing box 422 is 1.7mm, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm or 2.7 mm. The wall thickness H1 in this embodiment is preferably 2.2mm, the side wall is the bottom rotating sleeve of the rotating body composed of the fixed box 422 and the winding shaft 41 to form the bottom rotating hub, and supports and limits the rotating body to rotate around the shaft portion 4212, and the wall thickness of the bottom of the fixed box 422 is only used as the axial thickness of the rotating sleeve, so that the contact area between the fixed box 422 and the shaft portion 4212 is reduced, and the frictional resistance is reduced. When the thickness is large, the contact area between the fixing case 422 and the shaft portion 4212 is large, resulting in large friction force, resulting in a small installation space left for other components (such as the shaft portion 4212), possibly resulting in the spool 41 being stuck; when the thickness is small, the strength of the fixing case 422 is not good, which may cause the reel 41 to shake, and the smoothness of the rotation of the reel 41 is poor.

In another embodiment of the present invention, referring to fig. 17, the driving assembly 32 includes a motor 321, a lead screw module 322, and a sliding table 323. Wherein, the motor 321 is a servo motor 321, and the screw module 322 is in transmission connection with the output end of the motor 321; the sliding table 323 is slidably connected to the screw module 322, and the sliding table 323 is connected to the movable shaft 31 by a fixing member such as a screw. Motor 321 rotates and drives lead screw module 322 and rotates, and lead screw slip table 323 sliding connection can turn into linear motion with rotary motion on lead screw module 322, and this slip table 323 removes and then can drive the removal axle 31 of being connected with slip table 323 and remove.

In another embodiment of the present invention, referring to fig. 18 and 19, the drive assembly 32 further includes a motor driver 324 and a motor controller 325. The motor driver 324 is disposed in the housing 1 and configured to drive the motor 321 to rotate; a motor controller 325 is communicatively coupled to the motor driver 324. Through motor controller 325 software, a command is set to control the rotation parameters of the motor 321, the motor driver 324 is in communication connection with the motor controller 325, the motor driver 324 drives the motor 321 to rotate according to the set parameters, the motor 321 drives the lead screw on the lead screw module 322 to rotate, the lead screw rotates to drive the sliding table 323 to slide, so that the sliding table 323 advances and retreats, the moving shaft 31 synchronously advances and retreats, and the flexible screen 2 on the moving shaft 31 can be automatically pulled open and curled.

In another embodiment of the present invention, referring to fig. 17 and 18, the driving assembly 32 further includes a position sensor 326 and a position sensing piece 327. Wherein, the position sensor 326 is disposed on the lead screw module 322 and close to the curling element 42; the position sensing sheet 327 is disposed on the sliding table 323, and the position sensing sheet 327 is in communication connection with the motor controller 325. When the sliding table 323 slides to drive the position sensing sheet 327 to approach the position sensor 326, the sensing sheet senses and records the position as a zero point position, and transmits the signal to the motor controller 325, the motor controller 325 can accurately determine the position of the sliding table 323 in real time by calculating the rotating speed and time of the motor 321, calculate the length of the movable shaft 31 according to the maximum length of the flexible screen 2, set the maximum distance of the motor 321 through the motor controller 325 software, and set mechanical positioning at the same time, so as to prevent the flexible screen 2 from being damaged due to the overlarge distance of the motor 321.

In another embodiment of the present invention, referring to fig. 3, the flexible screen 2 includes a main body portion 21, a first main plate portion 22 and a second main plate portion 23. The main body 21 is used for displaying a picture; the first side of the first main plate 22 is electrically connected to the main body 21, and the second side of the first main plate 22 is attached to the movable shaft 31; the first side of the second main plate portion 23 is electrically connected to the main body portion 21, and the second side of the second main plate portion 23 is attached to the spool 41. Specifically, the first main board portion 22 is a flexible X-board, and the second main board portion 23 is a Chip On Film (COF).

In another embodiment of the present invention, the flexible screen 2 further comprises a display controller, the display controller is communicatively connected to the motor controller 325, and the display controller can calculate the position of the moving shaft 31 according to the received signal from the motor controller 325 to control the display area of the flexible screen 2 to match the expansion area of the flexible screen 2. Specifically, a USB port (not shown in the figure) is arranged on the display controller, the USB port on the display controller is connected to the display main board through a USB data line, and the motor controller 325 can feed back the real-time distance of the sliding table 323 to the display main board software, so that the television main board can know the real-time size of the flexible screen 2 during pulling, and the display main board software can control some specially-made television picture playing contents and dynamically match the flexible screen 2 during unfolding or rolling, for example, can control the flexible screen 2 curled onto the reel 41 to curl part of the screen on the reel 41, so as to avoid overheating of the flexible screen 2 after curling several layers, which are superposed together.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A flexible display device, comprising:

a housing;

the driving assembly is used for driving the moving shaft to move close to or far away from the reel, and the curling assembly is used for driving the reel to rotate when the moving shaft is close to or far away from the reel so as to fold and unfold the flexible screen.

2. The flexible display device of claim 1, wherein the curling assembly comprises:

the supporting seat is fixedly connected with the shell;

3. The flexible display device of claim 2, wherein the support base comprises:

the seat body part is fixedly connected with the shell; and

4. The flexible display device according to claim 3, wherein the shaft portion has a through hole groove penetrating through a wall of the shaft portion in a radial direction of the shaft portion, and an inner end of the winding shaft is connected to a first penetrating portion and a fixing portion in this order, the first penetrating portion being penetrated in the through hole groove, and the fixing portion being wound around an outer circumferential wall of the shaft portion and connected to the shaft portion.

5. The flexible display device of claim 4, wherein the retaining box comprises:

the box body part is arranged on the supporting seat; and

and the outer side end of the coil spring is connected with a second penetrating part, and the second penetrating part is fixedly penetrated in the gap.

6. The flexible display device of claim 5, wherein the retaining box further comprises:

the reel includes:

a sleeve portion sleeved on the shaft portion; and

7. The flexible display device according to any one of claims 1 to 6, wherein a sliding groove is provided on the housing, and an end of the moving shaft extends into the sliding groove and is connected to the driving assembly.

8. The flexible display device of claim 7, wherein the drive assembly comprises:

a motor;

9. The flexible display device of claim 8, wherein the drive assembly further comprises:

and the motor controller is in communication connection with the motor driver.

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

11. The flexible display device of claim 9, wherein the flexible screen comprises:

a main body part for displaying a screen;

12. The flexible display device according to claim 11, wherein a display controller is disposed on the flexible screen, the display controller is in communication with the motor controller, and the display controller can calculate the position of the moving axis according to a signal received from the motor controller to control the display area of the flexible screen to match the expansion area of the flexible screen.