CN217386575U - Flexible display panel and display device can curl - Google Patents

Abstract

The utility model discloses a flexible display panel and a display device which can be curled, wherein the flexible display panel comprises a limiting block and at least three functional film layers which are sequentially stacked along a first direction, and the first direction is parallel to the thickness direction of the flexible display panel which can be curled when the flexible display panel is unfolded; the limiting block is positioned between the at least two functional film layers, the limiting block and the at least one functional film layer are arranged on the same layer, and the limiting block is positioned at least one end of the functional film layer arranged on the same layer in the curling direction; the functional film layer adjacent to at least one of the two surfaces opposite to the limiting block along the first direction is provided with an accommodating part, and the limiting block is partially embedded into the accommodating part. In this way, the utility model discloses can solve the relative slip of the flexible display panel that can curl between the different function retes of in-process that curls, reduce the stress of sliding of the in-process that curls, improve the flexible display panel's that can curl life.

Description

Flexible display panel and display device can curl

Technical Field

The utility model relates to a show technical field, especially relate to a flexible display panel and display device can curl.

Background

With the development of display technology, flexible displays have shown great potential in the display field. From a fixed flexible display screen to a foldable display screen, the flexible display screen has the characteristics of large size and portability. In order to further meet the requirement that the display screen can be conveniently stored or carried when not in use, the flexible display screen capable of being rolled attracts more and more attention. At present, the rollable display screen is mostly considered to be used in the fields of notewood, Tablet Computer, vehicle-mounted display and the like, and the number of the curled turns of the rollable display module is more and more in consideration of space saving, carrying convenience and the like, so that the design requirement on the rollable display module is higher and higher, and the rollable display screen is a huge challenge for the display industry at present. Referring to fig. 1, fig. 1 is a schematic cross-sectional view illustrating a display module before and after a rollable display device is rolled in a conventional scheme. As shown in fig. 1, the flexible display module capable of being curled generally includes a plurality of stacked functional film structures, and when the flexible display module capable of being curled is curled, due to the existence of the thickness difference between the bottom layer and the top layer of the display module, when the number of curling turns is large, the film structures of the display module before and after being curled can slide, which affects the service life of the display device capable of being curled.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the main technical problem who solves provides a flexible display panel and display device can curl, can solve the relative slip of the flexible display panel that can curl between the different function retes of in-process that curls, reduces the sliding stress of the in-process that curls, improves the flexible display panel's that can curl life.

In order to solve the technical problem, the utility model discloses a technical scheme be: the flexible display panel capable of being curled comprises a limiting block and at least three functional film layers which are sequentially stacked along a first direction, wherein the first direction is parallel to the thickness direction of the flexible display panel capable of being curled when the flexible display panel is unfolded; the limiting block is positioned between the at least two functional film layers, the limiting block and the at least one functional film layer are arranged on the same layer, and the limiting block is positioned at least one end of the functional film layer arranged on the same layer in the curling direction; the functional film layer adjacent to at least one of the two surfaces opposite to the limiting block along the first direction is provided with an accommodating part, and the limiting block is partially embedded into the accommodating part.

The functional film layers are at least five layers, the limiting blocks are multiple, the limiting blocks are arranged in the first direction at intervals, and at least one functional film layer is arranged between every two adjacent limiting blocks.

Wherein the receiving portion includes one or more of a groove and a through hole.

The limiting block is used for limiting the relative sliding between the functional film layers; two surfaces of the limiting block opposite to each other along the first direction are bonded with the adjacent functional film layer; the limiting block is bonded with the mutually opposite side faces of the functional film layers arranged on the same layer.

The elastic modulus of the limiting block is smaller than the elastic modulus of the functional film layers adjacent to the two surfaces, opposite to the limiting block, in the first direction.

Wherein, the material of stopper is super glue.

Wherein, the stopper sets up around the function rete rather than the same layer setting.

The functional film layer comprises a back supporting film layer, a display device layer, a polarizing layer, an adhesive layer and a cover plate which are arranged in a stacked mode, at least part of limiting blocks and the display device layer are arranged on the same layer, and/or at least part of limiting blocks and the adhesive layer are arranged on the same layer; one side region of one or more of the back support film layer, the polarizing layer and the cover plate opposite to the limiting block is provided with an accommodating part.

Wherein the rollable flexible display panel further comprises: the supporting block is positioned on one side, away from the functional film layer arranged on the same layer with the limiting block, of the limiting block, and the elastic modulus of the supporting block is greater than that of the limiting block; the supporting block is bonded with the limiting block.

Wherein, the supporting shoe sets up with apron an organic whole.

Wherein, the supporting shoe sets up with back support rete is integrative.

For solving the technical problem, the utility model discloses a another technical scheme is: there is provided a rollable flexible display device comprising a roll fixedly connected to one of the edges of the rollable flexible display panel and the rollable flexible display panel of any of the above, the rollable flexible display panel being rolled up and unrolled around the roll.

The beneficial effects of the utility model are that: different from the prior art, the rollable display panel of the present invention comprises a limiting block and at least three functional film layers sequentially stacked along a first direction, wherein the first direction is parallel to the thickness direction of the rollable flexible display panel when the rollable flexible display panel is unfolded; the limiting block is positioned between the at least two layers of functional film layers, the limiting block and the at least one layer of functional film layer are arranged on the same layer, the limiting block is positioned at least one end of the functional film layer arranged on the same layer in the curling direction, the limiting block is used for blocking the slippage of the film layers, the slippage stress in the curling process is reduced, and the service life of the flexible display panel is prolonged; simultaneously through set up the holding portion on adjacent rete, can improve the stability of stopper, and can block sliding of adjacent rete simultaneously.

Drawings

Fig. 1 is a schematic cross-sectional structure diagram of a display module before and after a flexible display device is rolled in a conventional scheme;

fig. 2 is a schematic cross-sectional view of a rollable flexible display panel in an embodiment of the present application;

fig. 3 is a schematic top view of a rollable flexible display panel in accordance with an embodiment of the present application;

fig. 4 is a schematic cross-sectional view of a rollable flexible display panel in an embodiment of the present application;

fig. 5 is a schematic cross-sectional view of a rollable flexible display panel in an embodiment of the present application;

fig. 6 is a schematic cross-sectional view of a rollable flexible display panel in an embodiment of the present application;

fig. 7 is a schematic cross-sectional view of a rollable flexible display panel in accordance with an embodiment of the present application;

fig. 8 is a schematic top view of a back support film layer of a rollable flexible display panel in accordance with an embodiment of the present application;

fig. 9 is a schematic cross-sectional view of a rollable flexible display panel in an embodiment of the present application;

fig. 10 is a schematic cross-sectional view of a rollable flexible display device in an embodiment of the present application.

Detailed Description

In order to make the purpose, technical solution and effect of the present application clearer and clearer, the present application is further described in detail below with reference to the accompanying drawings and examples.

This application starts from the design of the flexible display panel that can curl, provides a new flexible display panel design scheme that can curl, can solve the relative slip between the different functional layers of the in-process display panel that curls, reduces the stress of sliding among the curling process, improves display panel's life.

Referring to fig. 2 and fig. 3, fig. 2 is a schematic cross-sectional structure diagram of a rollable flexible display panel in an embodiment of the present application, and fig. 3 is a schematic top-view structure diagram of the rollable flexible display panel in the embodiment of the present application. In this embodiment, the rollable flexible display panel 10 includes at least three functional film layers, such as the functional film layer 1, the functional film layer 2, and the functional film layer 3 shown in fig. 2, which are sequentially stacked along a first direction. The functional film layer can be a display device layer, a polarizing layer, a touch layer, a supporting layer and other film layers with different functions, and the flexible display panel can have specific performance. The first direction may be parallel to a thickness direction of the rollable flexible display panel 10 when unrolled. The first direction may be perpendicular to the display surface of the rollable flexible display panel 10.

As shown in fig. 3, the flexible display panel 10 can be curled along the length direction, when curled, because the flexible display panel 10 includes at least three functional films (functional film 1, functional film 2, functional film 3), the film structure has a certain thickness difference, and as the number of curled turns increases, the distances from the film layers to the center of the reel are different, the stresses are different, slippage between the film layers easily occurs, and slippage is easily accumulated at the end of the display panel, especially at the two ends in the curling direction. Based on this, in the scheme that this application provided, set up stopper 11 at the tip of the flexible display panel 10 that can curl the direction of curling, utilize stopper 11 to block the relative slip between the functional film layer, reduce the slip stress of curling in-process, improve flexible display panel's life. The curling direction may comprise one or at least two. The flexible display panel 10 may comprise two perpendicular curling directions.

Specifically, the limiting block 11 is located between at least two layers of functional film layers, the limiting block and the at least one layer of functional film layer are arranged on the same layer, and the limiting block 11 is located at least one end of the functional film layer arranged on the same layer in the curling direction. As shown in fig. 2, the limiting block 11 is located between the functional film layer 1 and the functional film layer 3, and the limiting block 11 and the functional film layer 2 are disposed on the same layer.

This scheme is preferred to set up stopper 11 in rather than the at least one end in the direction of curling of the functional film layer that the layer set up, if set up in the one end or both ends of functional film layer 2. The extension length of the limiting block 11 in the curling direction is not limited too much, and may exceed the end of the adjacent functional film layer or not. The side of the limiting block 11 away from the functional film layer disposed on the same layer as the limiting block can be flush with the corresponding side of the functional film layer on the upper and lower sides of the limiting block 11.

Further, the accommodating portion 20 is disposed on the functional film layer adjacent to at least one of two surfaces of the limiting block 11 opposite to each other in the first direction, and the limiting block 11 is partially embedded in the accommodating portion 20. As shown in fig. 2, an accommodating portion 20 may be disposed on a region of the functional film layer 3 facing the stopper 11 for accommodating and fixing the stopper 11. By arranging the accommodating part 20, on one hand, the limiting block 11 can be fixed, and the stability of the limiting block 11 is improved; on the other hand, the limiting block 11 can also play a certain role in stopping the slippage of the functional film layer 3. Optionally, the receptacle 20 may include one or more of a groove and a through hole. The accommodating portion 20 may be a groove or a through hole penetrating the functional film layer along the first direction; the accommodating parts 20 can be arranged on the functional film layer on one side of the limiting block 11, the accommodating parts 20 can be arranged on the functional film layers on the two sides, the number of the accommodating parts 20 is not limited, and the accommodating parts can be arranged according to the length of the limiting block.

Optionally, the receptacle 20 is multiple. The plurality of receiving portions 20 may be arranged in an array.

In one embodiment, the length D of the stop 11 in the crimping direction is greater than or equal to 0.1 mm. Specifically, the number of the curled coils can be set according to the size of the flexible display panel. The length of the functional film layer disposed on the same layer as the limiting block 11 in the curling direction may be smaller than the length of the functional film layer in contact with the two surfaces of the limiting block 11 opposite to each other in the first direction in the curling direction, so as to ensure that there is enough space to accommodate the limiting block 11. The maximum dimension of the stopper 11 in the first direction may be greater than the maximum dimension of the functional film layer disposed on the same layer as the stopper 11 in the first direction, so that the stopper 11 is embedded in the accommodating portion 20.

In one embodiment, the number of the functional film layers may be at least five, the number of the stoppers 11 is multiple, the plurality of stoppers 11 are spaced in the first direction, and at least one functional film layer is disposed between two adjacent stoppers 11. At least part of the limiting blocks can be arranged in different layers. Specifically, when the rollable flexible display panel includes a plurality of functional film layers, the stopper 11 may be provided only at an end portion of a portion of the functional film layers.

Referring to fig. 4, fig. 4 is a schematic cross-sectional structure diagram of a rollable flexible display panel in an embodiment of the present application. In this embodiment, the flexible display panel 10 includes at least five functional film layers stacked in sequence along a first direction, such as a functional film layer 1, a functional film layer 2, a functional film layer 3, a functional film layer 4, and a functional film layer 5 shown in the figure, and a stopper 11 may be disposed at an end of the functional film layer 2 and an end of the functional film layer 4. Namely, the plurality of limiting blocks 11 are arranged at intervals in the stacking direction of the functional film layers, and one layer or at least two layers of functional film layers are arranged between every two adjacent limiting blocks 11, such as the functional film layers 3 are arranged between the two limiting blocks 11. In other embodiments, the end of each functional film layer may be provided with the limiting block 11, for example, the end of each functional film layer 2, 3, 4 is provided with the limiting block 11, so as to better block slippage.

In an embodiment, the stopper 11 may be disposed only at one end of the functional film layer in the curling direction, or both ends of the functional film layer in the curling direction may be disposed with the stoppers 11. In other embodiments, each end of the functional film layer may be provided with a stopper 11 to limit the sliding of the blocking functional film layer in all directions. If the flexible display panel that can curl is the rectangle shape, can all set up stopper 11 at the tip all around of function rete. Optionally, the limiting block 11 is disposed around the functional film layer disposed on the same layer as the limiting block.

Referring to fig. 5, fig. 5 is a schematic cross-sectional structure diagram of a rollable flexible display panel in an embodiment of the present application. In this embodiment, a groove 21 is formed on a portion of the functional film layer adjacent to the stopper 11, which is opposite to the stopper 11, and the stopper 11 is partially embedded in the groove 21. As shown in fig. 5, the portions of the functional film layer 1 and the functional film layer 5 adjacent to the limiting block 11 are provided with grooves 21, the portions of the functional film layer 3 adjacent to the limiting block 11 are provided with grooves 21, the limiting block 11 is partially embedded into the grooves 21, and the limiting block 11 can be fixed so that the limiting block 11 is not easy to slide along with the sliding of the functional film layer. In an embodiment, the limiting block 11 may be a stress buffering adhesive with certain elasticity, which can absorb the sliding stress, block the sliding of the film layer of the flexible display panel, and protect the film layer of the flexible display panel to a certain extent. For example, the stopper 11 may be a strong adhesive with high cohesion and low creep, and has a certain adhesion to the film layer of the flexible display panel, so as to pull the film layer with the barrier function to slide. Preferably, the material of the limiting block is polyurethane, polycarbonate or polycaprolactone and the like.

Optionally, the material of the limiting block is super glue. The super glue may be an ocr (optical Clear resin) glue. The super glue may comprise one or more of an acrylic based OCR glue and a silicone based OCR glue. The acrylic OCR glue may be cured by means of Ultraviolet (UV) curing. The silicone-based OCR glue may be cured by Ultraviolet (UV) curing or heat curing.

Further, the stopper 11 is used to limit the relative sliding between the functional film layers. Optionally, two surfaces of the limiting block 11 opposite to each other along the first direction are bonded to the adjacent functional film layer; the limiting block 11 is bonded with the mutually opposite sides of the functional film layers arranged on the same layer. The stopper 11 blocks relative sliding between the functional film layers by adhesive force.

Optionally, the accommodating portions on the functional film layer between the two limiting blocks adjacently arranged in the first direction may be through holes, and portions of the two limiting blocks adjacently arranged in the first direction, which are located in the through holes, are bonded to each other.

The elastic modulus of the limiting block 11 is smaller than the elastic modulus of the functional film layers adjacent to the two surfaces of the limiting block 11 opposite to each other in the first direction. The stopper 11 is more flexible than the functional film layers adjacent to the two surfaces opposite the stopper 11 in the first direction. Compare in the concave-convex structure that sets up complementary gomphosis with the tip of the great function rete of two hardnesses to make the scheme of the relative movement of two function retes of restriction, the utility model discloses in the scheme, the stopper can play the effect of buffering, avoids stress too big, leads to the condition emergence that the crackle appears in the function rete.

Optionally, the elastic modulus of the functional film layer disposed on the same layer as the limiting block 11 is smaller than the elastic modulus of the functional film layer adjacent to the two surfaces of the limiting block facing in the first direction.

Optionally, the elastic modulus of the limiting block 11 may be greater than the elastic modulus of the functional film layer disposed on the same layer as the limiting block 11.

Referring to fig. 6, fig. 6 is a schematic cross-sectional structure diagram of a rollable flexible display panel in an embodiment of the present application. In this embodiment, the rollable flexible display panel further includes a supporting block 12, and the supporting block 12 is located on a side of the limiting block 11 away from the functional film layer disposed on the same layer as the limiting block. As shown in FIG. 6, the stopper 11 is located on the inside and the supporting block 12 is located on the outside. Optionally, the supporting block 12 is bonded to the limiting block 11.

Optionally, the supporting block 12 and the corresponding limiting block 11 are disposed on the same layer. Optionally, the side of the supporting block 12 away from the limiting block 11 disposed on the same layer as the supporting block may be flush with the corresponding side of the functional film layers on the upper and lower sides of the limiting block 11.

In one embodiment, the modulus of elasticity of the support block 12 is greater than the modulus of elasticity of the stopper 11. Alternatively, the stopper 11 is more flexible than the support block 12. The use has certain elastic stopper 11, can prevent to receive the impact of sliding stress and barrier force when stopping that the rete slides, causes destruction to flexible display panel's rete structure, plays certain cushioning effect. The supporting block 12 with certain rigidity can provide larger supporting force, resist sliding stress and prevent the film layer from sliding. The supporting block 12 is a hard material having a supporting function, and may be a resin member, specifically, the resin member may be polyethylene, polystyrene, polytetrafluoroethylene, polypropylene, polycarbonate, or the like.

Referring to fig. 7, fig. 7 is a schematic cross-sectional structure diagram of a rollable flexible display panel in an embodiment of the present application. In this embodiment, the rollable flexible display panel 10 includes a back support film layer 101, a first adhesive layer (not shown), a display device layer 102, a second adhesive layer (not shown), a polarization layer 103(polar, POL), a third adhesive layer 104, a cover plate 105, and the like, which are sequentially stacked.

The display device layer 102 can display, and the display device may be an organic Light-Emitting Diode (OLED), a Micro-LED (Micro-LED), a Mini Light-Emitting Diode (Mini LED), or the like. A back support Film (BPF) layer 101 on the non-display side of the display device layer 102 for supporting and protecting the display device layer 102, and a Cover Window (CWF) 105 having a frame-shaped structure on the display side of the display device layer 102 for supporting and protecting the display device layer 102. The polarizing layer 103 functions to filter stray light, filter glare, enhance visual acuity, improve color contrast and maximize visual comfort. The flexible display panel 10 may further include a touch layer (not shown) for implementing a touch function, and a user may control the flexible display panel by using a sliding motion of a finger, a stylus, or the like. The first adhesive layer and the second adhesive layer can be both pressure-sensitive adhesives, and the third adhesive layer can be optical adhesive (OCA).

In an embodiment, a stopper 11 may be disposed at least one end of the display device layer 102 and the adhesive layer 104 in the curling direction to block the sliding of the display device layer 102 and the adhesive layer 104. Further, stoppers 11 may be disposed at respective ends of the display device layer 102 and the adhesive layer 104. The adhesive force of the stopper 11 may be greater than that of the adhesive layer.

Referring to fig. 8, fig. 8 is a schematic top view of a back support film of a rollable flexible display panel according to an embodiment of the present disclosure.

The groove 21 may be formed in a partially recessed design on the upper side of the periphery of the back support film layer (BPF). Can support the rete (BPF) with the back all around and widen than the extension of display device layer relatively, support the rete (BPF) at the back and lengthen and widen the position and set up recess 21 to the powerful glue of coating forms stopper 11, like coating high cohesion, low creep powerful glue, makes inside the powerful glue embedding recess 21, and makes the powerful glue highly be a little higher than the display device layer.

Similarly, can widen the polarisation layer all around compare in the display device layer extension, widen the relative both sides in the first direction of edge of position at the polarisation layer extension and all set up recess 21, will have the polarisation layer of recess 21 and attach in the top on display device layer for protrusion is in the recess of polarisation layer is filled in to the super glue on display device layer, with the area of contact of increase super glue, increase adhesion, the increase blocks the gliding resistance relatively between the function rete.

Therefore, the other side of the polarizing layer can be coated with the super glue to form the limiting block 11, and the height of the super glue is slightly higher than that of the adhesive layer. Compare apron (CWF) all around in the extension widen in display device layer, the local indent design of downside that will widen with the extension attaches on gluing the layer for convex powerful glue fills the recess, with the area of contact of increase powerful glue, increase adhesion, the increase blocks the resistance of relative slip between the function rete.

Referring to fig. 9, fig. 9 is a schematic cross-sectional structure diagram of a rollable flexible display panel in an embodiment of the present application. In this embodiment, the lengthened and widened back support film layer (BPF) may be bent and attached to the end of the flexible display panel in the curling direction to form the support block 12, so as to stop the slippage of the film layer during the curling process and prolong the service life of the rollable flexible display panel.

In the embodiment, the supporting block is manufactured by using the back supporting film layer (BPF), a new film layer structure is not required to be added, the process is not greatly changed compared with the prior process, and the cost is reduced. Meanwhile, the structure can enable the back of the flexible display panel to be coated with the back supporting film layer and two end faces in the curling direction, or enable the back of the flexible display panel to be coated with the back supporting film layer and the end faces around the flexible display panel, so that the flexible display panel can be supported and protected in an all-round mode, and the stability of the display panel is improved.

In other embodiments, the lengthened and widened cover plate (CWF) may be bent and attached to an end of the flexible display panel to form the supporting block 12, which is not limited herein.

Referring to fig. 10, fig. 10 is a schematic cross-sectional view illustrating a rollable flexible display device according to an embodiment of the present disclosure. In this embodiment, a rollable flexible display device is provided that includes a roll shaft and a rollable flexible display panel. The reel is fixedly connected with one edge of the rollable flexible display panel, and the rollable flexible display panel is rolled up and unrolled around the reel. The reel sets up in the one side that the display device layer was kept away from to back support rete, can fix reel and back support rete through the viscose, and when curling, flexible display device is rolled up outward or interior. The flexible display panel may be any of the above embodiments. In the curling process of the display device, all functional film layers of the flexible display panel 10 are not easy to slip, so that the slip stress in the curling process is reduced, and the service life of the display panel is prolonged. The rollable display device can be a mobile phone, a tablet computer, a computer display, an MP3, an MP4, a vehicle-mounted display, a smart watch or other wearable device, and the like.

The above description is only an embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes performed by the content of the present specification and the attached drawings, or directly or indirectly applied to other related technical fields, are also included in the scope of the present invention.

Claims (10)

1. A rollable flexible display panel, comprising:

at least three functional film layers are sequentially stacked along a first direction, and the first direction is parallel to the thickness direction of the flexible display panel capable of being curled when the flexible display panel is unfolded;

the limiting block is positioned between at least two functional film layers, the limiting block and at least one functional film layer are arranged on the same layer, and the limiting block is positioned at least one end of the functional film layer arranged on the same layer in the curling direction;

the functional film layer adjacent to at least one of two surfaces opposite to the limiting block along the first direction is provided with an accommodating part, and the limiting block is partially embedded into the accommodating part.

2. The rollable flexible display panel according to claim 1, wherein the functional film layers are at least five layers, the plurality of stoppers are spaced apart in the first direction, and at least one layer of the functional film layers is disposed between two adjacent stoppers.

3. The rollable flexible display panel according to claim 1, wherein the receiving portion comprises one or more of a groove and a through hole.

4. A rollable flexible display panel according to claim 1,

the limiting block is used for limiting the relative sliding between the functional film layers;

two surfaces of the limiting block opposite to each other along the first direction are bonded with the adjacent functional film layer;

the limiting block is bonded with the opposite side faces of the functional film layers arranged on the same layer.

5. A rollable flexible display panel according to claim 4,

the elastic modulus of the limiting block is smaller than the elastic modulus of the functional film layer adjacent to the two surfaces of the limiting block opposite to each other along the first direction;

the limiting block is made of super glue.

6. The rollable flexible display panel of claim 1, wherein the stop block is disposed around the functional film layer disposed on the same layer as the stop block.

7. A rollable flexible display panel according to any one of claims 1-6, wherein the functional film layers comprise a back support film layer, a display device layer, a polarizing layer, an adhesive layer and a cover plate arranged in a stack;

at least part of the limiting block and the display device layer are arranged in the same layer, and/or at least part of the limiting block and the adhesive layer are arranged in the same layer;

one or more of the back support film layer, the polarizing layer and the cover plate is provided with the accommodating part at one side region opposite to the limiting block.

8. A rollable flexible display panel according to claim 7,

the rollable flexible display panel further comprises: the supporting block is positioned on one side of the limiting block, which is far away from the functional film layer arranged on the same layer as the limiting block, and the elastic modulus of the supporting block is greater than that of the limiting block; the supporting block is bonded with the limiting block.

9. A rollable flexible display panel according to claim 8,

the supporting block and the cover plate are integrally arranged; or

The support blocks and the back support film layer are integrally arranged.

10. A rollable flexible display device, comprising: a roll and a rollable flexible display panel according to any one of claims 1 to 9, the roll being fixedly connected to one of the edges of the rollable flexible display panel, the rollable flexible display panel being rolled up and unrolled around the roll.

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