CN212411481U

CN212411481U - Flexible display device

Info

Publication number: CN212411481U
Application number: CN202021383185.6U
Authority: CN
Inventors: 代伟男
Original assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Priority date: 2020-07-14
Filing date: 2020-07-14
Publication date: 2021-01-26
Anticipated expiration: 2030-07-14

Abstract

The present disclosure provides a flexible display device comprising a flexible display screen and a curling mechanism; the flexible display screen comprises a flexible display screen body and a penetrating structure arranged on one side of the flexible display screen body, which is far away from the display surface, wherein the flexible display screen body is provided with a first end and a second end which are opposite; the curling mechanism comprises two shells, two reel groups and at least one supporting strip, wherein each shell is provided with an open accommodating cavity, the reel groups are arranged in the accommodating cavities and correspond to the shells one to one, and each of the two reel groups comprises a first reel and a second reel which are coaxially arranged; wherein, first end is connected with the first spool of a spool group, and the second end is connected with the first spool of another spool group, and wear to establish the structure is worn to locate by the support bar to one end is connected with the second spool of a spool group, and the other end is connected with the second spool of another spool group. According to the flexible display device, the supporting bars are stretched after being unfolded, so that the flexible display screen can be supported and flattened.

Description

Flexible display device

Technical Field

The present disclosure relates to the field of display technologies, and more particularly, to a flexible display device.

Background

The flexible OLED can be manufactured into a curved display product, a folding display product, a curling display product and the like, the use scenes of the display field are enriched due to the flexible characteristic of the display device, the volume of the display device can be reduced after the display device is curled, and the portable characteristic of the display device is improved. However, in a long-time rolled state, a display screen of the display device may be warped, which seriously affects the display effect of the display device.

SUMMERY OF THE UTILITY MODEL

The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

The embodiment of the disclosure provides a flexible display device, which can solve the problem that a display screen is easy to warp after being curled for a long time.

The flexible display device provided by the embodiment of the disclosure comprises a flexible display screen and a curling mechanism;

the flexible display screen comprises a flexible display screen body and a penetrating structure arranged on one side, far away from a display surface, of the flexible display screen body, wherein the flexible display screen body is provided with a first end and a second end which are opposite;

the curling mechanism comprises two shells, two reel sets and at least one supporting strip, wherein each shell is provided with an open accommodating cavity, the reel sets are arranged in the accommodating cavities and correspond to the shells one to one, and each reel set comprises a first reel and a second reel which are coaxially arranged;

the first end is connected with a first reel of the reel set, the second end is connected with another first reel of the reel set, the supporting strip penetrates through the penetrating structure, one end of the supporting strip is connected with a second reel of the reel set, and the other end of the supporting strip is connected with another second reel of the reel set.

In an exemplary embodiment, the number of the supporting bars is 3, wherein the middle one of the supporting bars is located at the middle position of the flexible display screen, and the other two supporting bars are located at the position of the flexible display screen adjacent to the end portion.

In an exemplary embodiment, the thickness of the supporting strip is 20 micrometers to 50 micrometers, and the width of the supporting strip is 1 mm to 5 mm.

In an exemplary embodiment, the supporting bars are linear structures, and the linear diameter of the supporting bars is between 100 micrometers and 1000 micrometers.

In an exemplary embodiment, the penetrating structure comprises a plurality of fixing strips arranged on the flexible display screen body, two opposite ends of each fixing strip are connected with the flexible display screen body, a via hole is formed between the middle position of each fixing strip and the flexible display screen body, and the supporting strips penetrate through the via holes.

In an exemplary embodiment, the plurality of fixing bars are arranged in a plurality of rows and a plurality of columns, and each row of the fixing bars corresponds to one supporting bar.

In an exemplary embodiment, the flexible display screen body includes a back film and a functional structure layer disposed on the back film, the back film includes a bearing region facing the functional structure layer and edge regions disposed on the peripheries of two opposite sides of the bearing region, and the penetrating structure further includes a via hole structure formed by bending the edge regions toward the bearing region and connecting the ends of the edge regions with the bearing region.

In an exemplary embodiment, the second roller of the roller set corresponds to the support strip one by one.

In an exemplary embodiment, in the same reel group, the first reels include a plurality of reels and are arranged at intervals, and the second reels are arranged between the adjacent first reels.

In an exemplary embodiment, the method is characterized by: the shaft diameter of the first winding shaft is larger than that of the second winding shaft.

The flexible display device that this disclosed embodiment provided, through first spool rolling and expansion flexible display screen, through second spool rolling and expansion support bar, when flexible display screen was in the casing through first spool rolling, the support bar was rolled up in the casing in step. When the flexible display screen expandes, the support bar expandes in step, and the support bar is stretched after expanding, can support flexible display screen position of bowing, drags flexible display screen's warpage position, makes flexible display screen exhibition flat, promotes flexible display device's display effect.

Additional features and advantages of the disclosure will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the disclosure. The objectives and other advantages of the disclosure may be realized and attained by the structure particularly pointed out in the written description and drawings.

Other aspects will be apparent upon reading and understanding the attached drawings and detailed description.

Drawings

The accompanying drawings are included to provide a further understanding of the disclosed embodiments and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the example serve to explain the principles of the disclosure and not to limit the disclosure.

FIG. 1 is a block diagram of a flexible display screen of a display device;

fig. 2a is a schematic diagram of a flexible display device curling mechanism according to an embodiment of the disclosure;

FIG. 2b is a schematic view of an unfolded structure of a flexible display device according to an embodiment of the present disclosure;

FIG. 3a is a perspective view of a reel set according to an exemplary embodiment of the present disclosure;

FIG. 3b is a cross-sectional view of a spool set according to an exemplary embodiment of the present disclosure;

FIG. 4 is a block diagram of a flexible display screen in an exemplary embodiment of the present disclosure;

fig. 5 is a structural view of a display device.

Description of the reference numerals

1-a flexible display device; 10-a flexible display screen; 11-a backing film;

12-a polyimide substrate; 13-driving the structural layer; 14-an organic light-emitting layer;

15-an encapsulation layer; 16-a touch layer; 17-a polarizer;

18-top protective film; 101-a flexible display screen body; 101 a-a functional structural layer;

102-a penetrating structure; 1021-a first pass-through structure; 1022 — a second piercing structure;

20-a crimping mechanism; 21-a housing; 211-a housing chamber;

22-reel group; 221-a first reel; 222-a second reel;

23-support bar.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

Fig. 1 is a structural view of a flexible display screen of a display device. As shown in fig. 1, the flexible display screen 10 is formed by laminating multiple layers of films, and sequentially comprises the following components from bottom to top: the backlight module comprises a back film 11, a polyimide substrate 12, a driving structure layer 13, an organic light emitting layer 14, a packaging layer 15, a touch layer 16, a polarizer 17 and a top protective film 18. When the flexible display screen 10 is pulled out from the single-side/two-side scroll along the X direction, the flexible display screen in a curled state for a long time is affected by internal stress, in the Y direction, two side edges of the flexible display screen bend downwards, and the middle area of the flexible display screen warps upwards, so that unevenness in the Z direction of the flexible display screen is caused, and the display effect of the display device is seriously affected, wherein the X direction, the Y direction and the Z direction are perpendicular to each other.

The disclosed embodiment provides a flexible display device, comprising a flexible display screen and a curling mechanism;

the flexible display screen comprises a flexible display screen body and a penetrating structure arranged on one side of the flexible display screen body, which is far away from the display surface, wherein the flexible display screen body is provided with a first end and a second end which are opposite;

the curling mechanism comprises two shells, two reel groups and at least one supporting strip, wherein each shell is provided with an open accommodating cavity, the reel groups are arranged in the accommodating cavities and correspond to the shells one to one, and each of the two reel groups comprises a first reel and a second reel which are coaxially arranged;

wherein, first end is connected with the first spool of a spool group, and the second end is connected with the first spool of another spool group, and wear to establish the structure is worn to locate by the support bar to one end is connected with the second spool of a spool group, and the other end is connected with the second spool of another spool group.

Technical scheme of flexible display device in the embodiments of the present disclosure is exemplarily described below with reference to the accompanying drawings

Fig. 2a is a schematic view of a curling mechanism of a flexible display device according to an embodiment of the disclosure, and fig. 2b is a schematic view of an unfolding structure of the flexible display device according to the embodiment of the disclosure. As shown in fig. 2a, the flexible display device 1 comprises a flexible display screen 10 and a curling mechanism 20. The flexible display screen 10 is used for displaying and the curling mechanism 20 is used for curling and unrolling the flexible display screen 10. The flexible display screen 10 comprises a flexible display screen body 101 and a penetrating structure 102 arranged on one side, far away from a display surface, of the flexible display screen body 101, wherein the flexible display screen body 101 is provided with a first end and a second end which are opposite. The crimping mechanism 20 includes two housings 21, two reel sets 22 and a support bar 23. The housing 21 has an open receiving cavity 211, and the reel sets 22 are disposed in the receiving cavity 211 and correspond to the housings 21 one by one, that is, one reel set 22 is disposed in one housing 21. Each reel set 22 may be rotatably connected to the corresponding housing 21, and the housing 21 provides protection for the flexible display screen to prevent the flexible display screen from being scratched. As shown in fig. 2b, both reel sets 22 comprise a first reel 221 and a second reel 222 arranged coaxially. The first end of the flexible display body 101 is connected to the first roller 221 of one roller set 22, and the second end of the flexible display body 101 is connected to the first roller 221 of another roller set 22. The supporting strip 23 is inserted into the insertion structure 102, and one end of the supporting strip 23 is connected to the second reel 222 of one reel set 22, and the other end of the supporting strip is connected to the second reel 222 of the other reel set 22, so that the supporting strip 23 and the insertion structure 102 can slide relatively.

In an exemplary embodiment, as shown in fig. 2b, the supporting strips 23 include 3 supporting strips, wherein the middle supporting strip 23 is located at the middle position of the flexible display screen 10, and the other two supporting strips 23 are located at the positions adjacent to the end portions of the flexible display screen.

The supporting strip is flexible and has certain tensile strength. In an exemplary embodiment, the support strip has a thickness of 20 to 50 microns and a width of 1 to 5 millimeters. The material of the supporting strip comprises stainless steel. In one example, the support bars are linear structures, and the linear diameter of the support bars is between 100 microns and 1000 microns. The material of the supporting strip comprises steel wires, carbon fiber wires or other wires made of certain tensile materials.

Fig. 3a is a perspective view and fig. 3b is a cross-sectional view of a reel set according to an exemplary embodiment of the present disclosure. In an exemplary embodiment, as shown in fig. 3a-3b, in the same spool group, the first spools 221 are spaced apart from each other, and the second spools 222 are disposed between adjacent first spools 221. The number and the positions of the support strips and the second reels in the reel group correspond to each other one by one. In one example, the number of the second reels 222 of the reel group 22 is at least 3, wherein the middle second reel 222 is located at the middle position of the reel group 22, and the other two second reels 222 are located at the end portions of the reel group 22. Like this, the edge of flexible display screen can be supported to the support strip that is located on the second spool 222 that is close to the tip position, prevents the edge downwarping of flexible display screen, and the intermediate position of flexible display screen can be dragged to the support strip on middle second spool 222, prevents the intermediate position warpage of flexible display screen, guarantees the planarization of flexible display screen.

In an exemplary embodiment, as shown in FIG. 3b, the first spool 221 has a larger shaft diameter than the second spool 222. The shaft diameter of the first roller 221 and the shaft diameter of the second roller 222 are determined according to the specific size of the flexible display screen.

In the same reel group, the first reel and the second reel are fixedly connected. In an exemplary embodiment, the first scroll and the second scroll may work independently, and the flexible display device further includes a driving mechanism disposed in the housing, and the driving mechanism is configured to drive the second scroll to rotationally stretch the supporting bar after the flexible display screen is unfolded. When the flexible display screen is not completely unfolded, the first scroll and the second scroll synchronously rotate; after the screen expandes, first spool reachs rotatory limit, and the second spool is rotatory under actuating mechanism's drive, can drive the support bar and do further dragging, promotes the roughness of support bar, and then further improves the display effect of flexible display screen. In one example, the drive mechanism includes a stationary rotor and a control coil, the control coil being disposed on the rotational axis of the second spool, the stationary rotor being disposed within the second spool. When first spool rotation arrived the expansion limit of flexible display screen, it is rotatory that control coil expert's electric drive fixed rotor, and fixed rotor drives the second spool rotation, and similar in-wheel motor structure, the second spool direction of rotation of support bar both sides is opposite, taut support bar. Of course, the driving mechanism may also adopt other implementation manners, and is not particularly limited in the present disclosure. In order to realize synchronous rotation of the first reel and the second reel, the same rotating shaft can be adopted for the first reel and the second reel.

In an exemplary embodiment, the flexible display device further comprises a rolling mechanism for driving the reel set to rotate so as to enable the flexible display screen and the supporting bars to be rolled and received in the shell. In one example, the winding mechanism is a winding spring and is disposed on the reel set.

Fig. 4 is a block diagram of a flexible display screen in an exemplary embodiment of the present disclosure. In an exemplary embodiment, as shown in fig. 4, the through structure 102 includes a first through structure 1021, the first through structure includes a plurality of fixing bars disposed on a side of the flexible display screen body 101 away from the display surface, two opposite ends of each fixing bar are connected to the flexible display screen body 101, a through hole is formed between the middle position and the flexible display screen body 101, the supporting bar is disposed through the through hole, and the fixing bars are in clearance fit with the supporting bar. The opposite ends of each fixing strip are connected to the flexible display body 101 by bonding. In one example, the plurality of fixing strips are arranged in a plurality of rows and a plurality of columns, and each row of fixing strips corresponds to one supporting strip. The fixing strips in one row are arranged in the middle of the flexible display screen body in the stretching direction, that is, in the middle of the horizontal direction (X direction) in fig. 2 a. The material of the fixing strip comprises polyimide.

In an exemplary embodiment, the flexible display screen body 101 includes a back film 11 and a functional structure layer 101a disposed on the back film 11, the back film 11 includes a carrying region directly opposite to the functional structure layer 101a and edge regions disposed on peripheries of two opposite sides of the carrying region, the through structure 102 further includes a second through structure 1022, and the second through structure 1022 includes a via structure formed by bending the edge region toward the carrying region and connecting an end of the edge region with the carrying region. The end of the edge region may be connected to the load bearing region by adhesive. In this embodiment, the functional structure layer 101a may include a polyimide substrate, a driving structure layer, an organic light emitting layer, an encapsulation layer, a touch layer, a polarizer, and a top protection film sequentially stacked on the back film.

Fig. 5 is a structural view of a display device. In an embodiment, as shown in fig. 5, the flexible display screen 10 is supported by the hard supporting member 30, and in the process of accommodating the flexible display screen 10, the hard supporting member 30 is curled at the same time, and the hard supporting member 30 increases the overall thickness of the reel.

The technical solution of the flexible display device of the present disclosure is exemplarily illustrated by the working principle of the flexible display device.

The flexible display screen is curled and contained in the shell, the two shells move back to back along the X direction, and the flexible display screen is gradually unfolded. During the unwinding process, the first reel and the second reel rotate synchronously. After the flexible display screen is unfolded, the supporting bars are also unfolded. The support bars located on the two sides of the Y direction of the flexible display screen support the flexible display screen, and the support bars located in the middle of the Y direction pull the flexible display screen, so that the flexible display screen is flat in the Z direction. In an example, the flexible display device comprises a driving mechanism, the driving mechanism can drive the second reel to rotate, the second reel on two sides of the supporting strip is opposite in rotating direction, the supporting strip is stretched, the supporting strip is enabled to be more smooth, and therefore the flatness of the flexible display screen is effectively improved. Wherein the X-direction, the Y-direction and the Z-direction are perpendicular to each other.

The flexible display device can be applied to display terminals such as mobile phones, flat panels and notebook computers. The display terminal can comprise a bracket and a locking mechanism, the two shells can be connected on the bracket in a sliding mode and can move close to or away from each other, and the locking mechanism can lock the shells at the unfolding position of the flexible display screen. After the shell is locked, the driving mechanism can drive the second reel to continue rotating and pull the supporting strip.

In the description of the present disclosure, it should be noted that the terms "upper", "lower", "one side", "the other side", "one end", "the other end", "side", "opposite", "four corners", "periphery", "mouth" word structure ", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present disclosure and simplifying the description, but do not indicate or imply that the structures referred to have a specific orientation, are configured and operated in a specific orientation, and thus, cannot be construed as limiting the present disclosure.

In the description of the embodiments of the present disclosure, unless otherwise explicitly specified or limited, the terms "connected," "directly connected," "indirectly connected," "fixedly connected," "mounted," and "assembled" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; the terms "mounted," "connected," and "fixedly connected" may be directly connected or indirectly connected through intervening media, or may be connected through two elements. The specific meaning of the above terms in the present disclosure can be understood in specific instances by those of ordinary skill in the art.

Although the embodiments disclosed in the present disclosure are described above, the descriptions are only for the convenience of understanding the present disclosure, and are not intended to limit the present disclosure. It will be understood by those skilled in the art of the present disclosure that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure, and that the scope of the disclosure is to be limited only by the terms of the appended claims.

Claims

1. A flexible display device is characterized by comprising a flexible display screen and a curling mechanism;

2. The flexible display device of claim 1, wherein: the support bar includes 3, wherein, middle one the support bar is located flexible display screen's intermediate position, other two the support bar is located flexible display screen is adjacent the position of end.

3. The flexible display device of claim 1, wherein: the thickness of the supporting strip is 20 micrometers to 50 micrometers, and the width of the supporting strip is 1 millimeter to 5 millimeters.

4. The flexible display device of claim 1, wherein: the supporting strip is of a linear structure, and the line diameter of the supporting strip is between 100 microns and 1000 microns.

5. The flexible display device according to any one of claims 1 to 4, wherein: wear to establish the structure including set up in a plurality of fixed strips on the flexible display screen body, every the both ends that the fixed strip is relative with this body coupling of flexible display screen, middle part position with form the via hole between the flexible display screen body, the support bar is worn to locate the via hole.

6. The flexible display device of claim 5, wherein: the fixing strips are arranged in multiple rows and multiple columns, and each row of the fixing strips corresponds to one supporting strip.

7. The flexible display device of claim 5, wherein: the flexible display screen body includes the notacoria and sets up in functional structure layer on the notacoria, the notacoria include with functional structure layer just right bear the weight of the region with set up in bear the weight of regional relative both sides outlying marginal area, wear to establish the structure still include the marginal area orientation bear regional crooked and marginal area's tip with bear the weight of regional connection formation's via hole structure.

8. The flexible display device according to any one of claims 1 to 4, wherein: and the second reels in the reel group correspond to the support strips one by one.

9. The flexible display device of claim 8, wherein: in same spool group, first spool includes a plurality ofly and interval setting, the second spool sets up in adjacent between the first spool.

10. The flexible display device according to any one of claims 1 to 4, wherein: the shaft diameter of the first winding shaft is larger than that of the second winding shaft.