CN115331568A - Flexible display module and sliding roll display device - Google Patents
Flexible display module and sliding roll display device Download PDFInfo
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- CN115331568A CN115331568A CN202211140978.9A CN202211140978A CN115331568A CN 115331568 A CN115331568 A CN 115331568A CN 202211140978 A CN202211140978 A CN 202211140978A CN 115331568 A CN115331568 A CN 115331568A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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Abstract
The invention discloses a flexible display module and a sliding roll display device, wherein the flexible display module comprises a flexible display panel, a sliding roll display device and a sliding roll display device, wherein the flexible display panel is provided with a display area and a bonding area positioned on the first side of the display area; the protection supporting layer is attached to the surface of one side, far away from the light emitting surface, of the flexible display panel, at least covers the display area, a connecting structure used for being connected with a driving device is arranged at the end, close to the first side, of the protection supporting layer, and the driving device is used for driving the end of the protection supporting layer to move. According to the invention, the technical steps of reversely folding the bonding area of the flexible display module and removing the back film are not required, so that the processing step of the display screen is omitted, namely, the display device of the full-face screen can still be obtained without reversely folding the bonding area of the flexible display module.
Description
Technical Field
The invention relates to the technical field of display. And more particularly, to a flexible display module and a sliding roll display device.
Background
The flexible display screen has the characteristics of being bendable, being capable of being curled and the like, and the display device can be curled or folded by utilizing the characteristics, so that convenience is brought to people for carrying and using the display device.
The sliding roll is another innovative application field of the flexible display panel, and the form realizes that a consumer can randomly switch the display area of the flexible display panel according to the self requirement, so that the sliding roll is convenient for the user to carry, provides the use experience better than that of a folding display panel for the user, and is an important direction for the development of the flexible display panel. The screen of the sliding scroll display device is unfolded like a picture scroll, the continuous experience of a client can not be interrupted in the unfolding process of the screen, the fashionable feeling and the technological feeling are extremely strong, and better visual and use experience is brought to the client.
Disclosure of Invention
The invention aims to provide a flexible display module and a sliding and rolling display device, which are used for solving the problem that the sliding and rolling display device is easy to display and lose efficacy.
According to an aspect of the present invention, there is provided a flexible display module including:
the flexible display panel is provided with a display area and a bonding area positioned on the first side of the display area;
the protection supporting layer is attached to the surface of one side, far away from the light emitting surface, of the flexible display module, at least covers the display area, a connecting structure used for being connected with a driving device is arranged at the end, close to the first side, of the protection supporting layer, and the driving device is used for driving the end of the protection supporting layer to move.
Preferably, the flexible display panel includes:
the substrate base plate at least covers the display area and the bonding area;
a display function layer located on one side of the substrate base plate,
an encapsulation layer on a side of the display functional layer remote from the substrate base, the encapsulation layer configured to encapsulate the display functional layer on the substrate base, an
The back film is positioned on one side, far away from the display function layer, of the substrate base plate, and at least covers the display area and the bonding area;
wherein the protective supporting layer is positioned on one side of the back membrane far away from the substrate base plate.
Preferably, the flexible display panel further includes:
the polaroid is positioned on one side of the packaging layer, which is far away from the display function layer, and at least covers the display area;
the optical adhesive layer is positioned on one side of the polaroid, which is far away from the packaging layer, and at least covers the display area;
the flexible cover plate is positioned on one side, far away from the polaroid, of the optical adhesive layer, and at least covers the display area.
Preferably, the protective support layer is made of a stainless steel sheet or a carbon fiber sheet.
Preferably, a plurality of fixing holes opened near the end of the protective supporting layer are formed as the connection structure.
Preferably, the protective supporting layer covers at least the display area and the bonding area.
According to another aspect of the present invention, there is provided a roll display device including:
the shell is provided with a fixed part and a movable part arranged on one side of the fixed part, the movable part can move relative to the fixed part, the fixed part is provided with a first supporting surface, the movable part is provided with a second supporting surface, and the first supporting surface is flush with the second supporting surface;
the flexible display module of any of the above claims, wherein at least a portion of the display area covers the first support surface and the second support surface;
the reel is connected to the moving part, and the flexible display module is in contact with the reel and can slide around the reel;
the driving device is arranged on the fixed part of the shell and comprises a power source and a transmission device, and the connecting structure of the protection supporting layer is connected with the transmission device so that the power source drives the end part of the flexible display module to move through the transmission device.
Preferably, the power source is set as a motor, the transmission device comprises a screw rod connected with the motor and a sliding connection unit sleeved on the screw rod, and the connection structure on the protection supporting layer is connected with the sliding connection unit.
Preferably, the length of the sliding connection unit is equal to the width of the protective supporting layer.
Preferably, the radius of the reel is greater than 4mm.
The invention has the following beneficial effects:
when the flexible display module is used on the sliding roll display device, the bonding area is arranged at the position close to the end part where the protection supporting layer is connected with the driving device, so that the process steps of reversely folding the bonding area of the flexible display module and removing the back film are not needed, and the processing step of a display screen is omitted. Need not to turn over the bonding district of flexible display module promptly, and still can obtain the display device of full face screen.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 shows a schematic structural diagram of a flexible display panel in the prior art.
Fig. 2 is a schematic diagram of a flexible display module in a sliding roll display device according to the present invention.
Fig. 3 shows a schematic structural diagram of a flexible display panel according to the present invention.
Fig. 4 is a cross-sectional view of a flexible display module according to the present invention.
Fig. 5 is a partial schematic view showing a first position of the roll display device according to the present invention.
Fig. 6 is a partial schematic view of a second position of the roll display device according to the invention.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below with reference to preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
In a flexible display product, a back-folding bonding mode can be adopted to obtain a full-face screen with a narrower frame, wherein the back-folding bonding refers to back-folding a part of the flexible display panel, namely, bending the flexible display panel to the back of the display panel and then connecting the flexible display panel with a related electrical device on the back of the display panel.
Referring to fig. 1, a flexible display panel in the prior art includes: a display area 100 'and a bonding area 200', the bonding area 200 'being located at a peripheral area of the display area 100', the bonding area 200 'being capable of being bent to a back side of the display area 100'.
A plurality of pixel units may be disposed in the display area 100', each pixel unit includes a display device and a driving device, a signal trace may be disposed in the bonding area 200', the signal trace is connected to each pixel unit in the display area 100 'and electrically connected to the system control terminal through the connection area 210', so as to implement display control of the pixel units.
In order to achieve a narrow bezel and increase the screen ratio, the bonding region 200 'may be bent to the back of the display region 100', that is, the bonding region 200 'is bent to the back of the display region 100' along the long side edge of the flexible display panel. However, for a flexible display panel used in a roll-to-roll display device, which includes a roll-to-roll region 110 'partially wound around the surface of a roll, the roll-to-roll region 110' includes a portion of the display area 100 'and the bonding area 200', i.e., a portion of the display area 100 'and the bonding area 200' are wound around the roll. When the flexible display panel of the sliding and rolling display device is unfolded and rolled, the sliding and rolling area 110 'is unfolded or rolled to the back side of the flexible display panel through the reel, that is, the sliding and rolling area 110' is bent along the short side of the flexible display panel as an axis when being rolled. At this moment, the bonding area 200' located in the sliding and rolling area 110' is bent along the long side and the short side of the flexible display panel, because the bending directions of the two are mutually perpendicular, the bending along the long side can interfere with the bending of the flexible display panel during sliding and rolling, namely, the whole bending of the flexible display panel during sliding and rolling can be prevented, the flexible display panel is forced to be bent along the short side, the bonding area 200' can be caused to be dead-folded, the signal routing is easy to break, furthermore, functional layer failure or packaging failure can easily occur at the intersection of the sliding and rolling area 110' and the bonding area 200' which are bent for many times, the packaging failure can cause the rapid invasion of water and oxygen, and finally, the light emitting layer is peeled off, the flexible display panel is black, and the whole-face display failure of the flexible display panel is also caused.
It can be understood that the shape of the flexible display panel may include a square shape, a rectangular shape, and the like, and the bending direction of the bonding area 200 'is perpendicular to or intersecting with the bending direction of the flexible display panel during sliding and rolling, so that part of the bonding area 200' is bent along two directions at the same time, and the bonding area 200 'may prevent the flexible display panel from sliding and rolling and bending, and may easily cause the signal trace of the bonding area 200' to be broken.
To solve the above technical problem, an embodiment of the present disclosure provides a flexible display module, which is used in a sliding-rolling display device. As shown in fig. 2 and fig. 3, the flexible display module includes a flexible display panel 10 and a protective supporting layer 20, the flexible display panel 10 has a display area 100 and a bonding area Q4 located at a first side of the display area 100, where the display area 100 includes a first planar area Q1, a bending area Q2 and a second planar area Q3 which are adjacent in sequence, one side of the second planar area Q3 close to the bonding area Q4 is the first side, and the bonding area Q4 is adjacent to the second planar area Q3. It should be noted that the first planar area Q1, the bending area Q2 and the second planar area Q3 have the same structure, and are distinguished only by different position states in the roll-sliding display device, that is, in the roll-sliding process, the first planar area Q1, the bending area Q2 and the second planar area Q3 can be switched with each other.
The protection support layer 20 is attached to the back of the flexible display panel 10, that is, the protection support layer 20 is attached to a surface of one side of the flexible display panel 10 away from the light emitting surface, and the protection support layer 20 at least covers the display area 100, a connection structure for connecting with a driving device is arranged on the protection support layer 20 close to the first side, that is, a connection structure is arranged at an end of the protection support layer 20 corresponding to the second planar area Q3 of the flexible display panel. Because bonding area Q4 is close to second planar area Q3, and keeps away from bending area Q2 for bonding area Q4 can not produce and buckle, thereby solves the problem that flexible display panel 10 shows the inefficacy easily.
In one example, the protection support layer 20 is attached to the back of the flexible display panel 10, and the protection support layer 20 covers the display area 100 and the bonding area Q4 of the flexible display panel 10, and in this structure, the connection structure is disposed at the end of the protection support layer 20 corresponding to the bonding area Q4, that is, the connection structure is disposed at the end close to the protection support layer 20.
In the roll-sliding display device, the roll-sliding area of the flexible display panel is long, and there is no rigid support structure under the flexible display panel to balance the resilience of the panel, so it is necessary to apply enough pulling force to the end of the flexible display module to flatten the flexible display panel. The present embodiment provides a connection structure at an end of the protective support layer 20 for connecting with a driving device, by which the protective support layer 20 is pulled tight to flatten the flexible display panel, and the driving device moves by driving the end of the protective support layer 20 to unwind or wind the flexible display panel 10.
In one example, the end of the protective supporting layer 20 is opened with a plurality of fixing holes forming the connection structure for connecting with the driving device.
Since the bonding area Q4 is close to the connection structure of the protection support layer 20, when the flexible display module of the roll-sliding display device is in an unfolded state as shown in fig. 2, that is, when the roll-sliding display device has the largest visible area, the end portion of the protection support layer 20 provided with the connection structure and the bonding area Q4 of the flexible display panel 10 are still located below the winding shaft 30. That is, the end of the protective supporting layer 20 and the bonding area Q4 are always positioned below the reel 30 without being wound on the reel 30, and the bonding area Q4 does not need to be bent. The technological steps of reversely folding and removing the back film in the bonding area Q4 of the flexible display module 10 are not needed under the structure, and therefore the processing step of the display screen is omitted. That is, the bonding area Q4 of the flexible display panel 10 does not need to be folded back, and a full-screen display device can still be obtained. It should be noted that, when the flexible display panel is unfolded, the partial bending area Q2 and the second planar area Q3 are at positions that cannot be viewed by the user, and corresponding settings need to be made at the control end.
In one example, the protective supporting layer 20 is made of a material with certain rigidity, such as a stainless steel sheet or a carbon fiber sheet, so that the protective supporting layer 20 can provide a strong supporting effect for the flexible display module 10, and ensure that the flexible display screen can still maintain a flat state when a user touches the flexible display screen.
In some embodiments, the flexible display panel 10 includes a base substrate 101, a display function layer 102, an encapsulation layer 103, and a back film 104, which are stacked. The base substrate 101 includes a flexible material, which may be at least one of Polyimide (PI) and polyethylene terephthalate (PET). The display function layer 102 is located on one side of the substrate base 101, the encapsulation layer 103 is located on one side of the display function layer 102 away from the substrate base 101, the encapsulation layer 103 is configured to encapsulate the display function layer 102 on the substrate base 101, the back film 104 is located on one side of the substrate base 101 away from the display function layer 102, and the back film 104 and the substrate base 101 at least cover the display area 100 and the bonding area Q4. The protective support layer 20 is located on the side of the backing film 104 remote from the base substrate 101.
The flexible display panel 10 has a display area 100 and a bonding area Q4, the display area 100 includes a plurality of sub-pixel areas therein, and the plurality of sub-pixel areas may include, for example, a plurality of red sub-pixel areas, a plurality of green sub-pixel areas, and a plurality of blue sub-pixel areas.
In one example, the display function layer 102 includes a plurality of light emitting devices respectively located in the plurality of sub-pixel regions, and by the plurality of light emitting devices emitting light, display of images and characters can be realized in the display region 100.
In some examples, the flexible display panel 10 further includes a polarizer 105, an optical adhesive layer 106, and a flexible cover plate 107, the polarizer 105 is located on a side of the encapsulation layer 103 away from the substrate 101, the polarizer 105 at least covers the display region 100, the optical adhesive layer 106 is located on a side of the polarizer away from the encapsulation layer 103, the optical adhesive layer 106 at least covers the display region 100, the flexible cover plate 107 is located on a side of the optical adhesive layer 106 away from the polarizer 105, and the flexible cover plate 107 at least covers the display region 100.
In some examples, the material of the back film 104 includes at least one of polyethylene naphthalate (PEN), polycarbonate (PC), PET, and PI.
In some examples, the material of the polarizer 105 includes at least one of polyvinyl alcohol (PVA) and polymethyl methacrylate (PMMA).
In some examples, the material of the optical glue layer 106 includes at least one of PU (Polyurethane) glue, acrylic glue, and silicone glue.
In some examples, the material of the flexible cover plate 107 includes ultra-thin glass.
On the other hand, as shown in fig. 5, an embodiment of the present disclosure further provides a sliding-rolling display device, which includes any one of the flexible display modules, a housing, a rolling shaft 30, and a driving device 40.
The housing includes a fixed portion and a movable portion, the movable portion is located at one side of the fixed portion and can move relatively therebetween, specifically, in the present embodiment, the movable portion is connected with the fixed portion in a sliding manner, that is, the movable portion can slide relative to the fixed portion, for example, a slide rail can be disposed on the fixed portion, and the movable portion can move along the slide rail to move the movable portion away from or close to the fixed portion. It will be appreciated that the movement can be in response to an external control signal to drive the moving part towards a direction away from or towards the fixed part.
The reel 30 is connected with the moving part, one end of the protection supporting layer 20 of the flexible display module is connected with the fixed part of the housing, and the other end of the protection supporting layer is connected with the driving device 40 after being wound around the reel 30, namely, the end part, close to the bonding area Q4, of the protection supporting layer 20 is connected with the driving device 40. The bonding area Q4 of the flexible display module 10 is connected to an external circuit through an FPC, and the relative position between the FPC and the protective supporting layer 20 is not changed. In order to save the space of the whole machine, a connector for connecting with the FPC is placed on a hole plate, and the hole plate is arranged in a fixing part of the shell.
In some examples, the fixed portion of the housing has a first supporting surface, the moving portion has a second supporting surface, and the first supporting surface is flush with a top surface of the second supporting surface, and at least a portion of the flexible display panel covers the first supporting surface and the second supporting surface.
The moving part moves to the first position and the second position, when the moving part is located at the first position as shown in fig. 5, the moving part is far away from the fixed part, and the display device can obtain the maximum display area, namely, the sliding and rolling display device is in an unfolding state, so that the requirement of large-screen display of a user is met. When the movable portion is located at the second position as shown in fig. 6, which is close to the fixed portion, the display device can obtain the minimum external dimension, i.e., the display device is in a contracted state, and is convenient to carry.
The first position and the second position can be regarded as two extreme positions of the moving part moving relative to the fixed part. When the first position, the display area of flexible display module reaches the biggest state, and under normal condition, the removal portion can not do relative the fixed part and move far away from relatively. When the flexible display module is in the second position, the display area of the flexible display module reaches the minimum state, and under the normal condition, the moving part can not move close to the fixed part relatively.
In some examples, the driving device 40 includes a power source 41 and a transmission device, the connection structure on the protection support layer 20 is connected to the transmission device, and the power source 41 drives the end of the protection support layer 20 to move through the transmission device, so as to drive the end of the flexible display panel 10 to move, and further, the flexible display panel is unfolded or rolled. That is, when the moving part moves to the first position, the transmission device drives the end of the protection supporting layer 20 to move towards the direction away from the fixing part, so that the flexible display panel is unfolded on the first supporting surface and the second supporting surface, thereby increasing the display area of the flexible display panel, when the moving part moves to the second position, the transmission device drives the end of the protection supporting layer 20 to move towards the direction close to the fixing part, so that the flexible display panel is rolled from the first supporting surface and the second supporting surface, and thereby reducing the display area of the flexible display panel.
Specifically, the power source 41 is a motor, the transmission device includes a screw rod 42 and a sliding connection unit 43, an output shaft of the motor is connected with the screw rod 42 to drive the screw rod 42 to rotate, wherein the power source 41 is fixedly connected to a fixing portion of the housing, the screw rod 42 is rotatably connected to the fixing portion of the housing, the sliding connection unit 43 is sleeved on an outer peripheral surface of the screw rod 42 through threads, and when the screw rod 42 rotates, the sliding connection unit 43 can move in a reciprocating manner along an axial direction of the screw rod 42. The end of the protective supporting layer 20 is fixedly connected to the sliding connection unit 43 through a connection structure, so that the sliding connection unit 43 can move the end of the protective supporting layer 20.
In one example, the sliding connection units 43 are provided in a bar shape having a rectangular cross section, and the length of the bar-shaped sliding connection units 43 is equal to the width of the end of the protection supporting layer 20, so that the end of the protection supporting layer 20 is entirely overlapped on the sliding connection units 43, so that the protection supporting layer 20 can be smoothly moved.
In one example, the surface of the sliding connection unit 43 is provided with a plurality of protrusions corresponding to the fixing holes of the end of the protective support layer 20, which are snap-fitted to the fixing holes, thereby fixing the end of the protective support layer 20 to the sliding connection unit 43.
In one example, the winding shaft 30 is provided as a cylinder, the protective supporting layer 20 is wound around a part of the outer peripheral surface of the winding shaft 30, and performs a roll-sliding motion around the winding shaft 30 under the action of the driving part, so that the protective supporting layer 20 can drive the flexible display panel 10 to perform a roll-sliding motion as well, and since the flexible display panel 10 is not in direct contact with the winding shaft 30, when the roll-sliding motion occurs, the protective supporting layer 20 can provide a protective effect for the flexible display panel 10, and abrasion to the flexible display panel 10 when the winding shaft 30 is in direct contact with the flexible display module 10 is avoided.
It should be noted that, when the flexible display panel is rolled in a sliding manner, the reel 30 may not rotate along with the flexible display panel, so that during the rolling movement, the outer peripheral surface of the reel 30 always provides a good support function for the flexible display panel.
In one example, the radius of the roll 30 is more than 4mm, so that the bending radius of the protective supporting layer 20 is more than 4mm, and thus the bending radius of the flexible display panel is more than 4mm.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It is further noted that, in the description of the present invention, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.
Claims (10)
1. The utility model provides a flexible display module assembly which characterized in that includes:
the flexible display panel is provided with a display area and a bonding area positioned on the first side of the display area;
the protection supporting layer is attached to the surface of one side, far away from the light emitting surface, of the flexible display module, at least covers the display area, a connecting structure used for being connected with a driving device is arranged at the end, close to the first side, of the protection supporting layer, and the driving device is used for driving the end of the protection supporting layer to move.
2. The flexible display module of claim 1, wherein the flexible display panel comprises:
the substrate base plate at least covers the display area and the bonding area;
a display function layer located on one side of the substrate base plate,
an encapsulation layer on a side of the display functional layer remote from the substrate base, the encapsulation layer configured to encapsulate the display functional layer on the substrate base, an
The back film is positioned on one side, far away from the display function layer, of the substrate base plate, and at least covers the display area and the bonding area;
wherein the protective supporting layer is positioned on one side of the back membrane far away from the substrate base plate.
3. The flexible display module of claim 2, wherein the flexible display panel further comprises:
the polaroid is positioned on one side of the packaging layer, which is far away from the display function layer, and at least covers the display area;
the optical adhesive layer is positioned on one side of the polaroid, which is far away from the packaging layer, and at least covers the display area;
the flexible cover plate is positioned on one side, far away from the polaroid, of the optical adhesive layer, and at least covers the display area.
4. The flexible display module of claim 1, wherein the protective support layer is made of stainless steel or carbon fiber sheets.
5. The flexible display module of claim 1, wherein a plurality of fastening holes provided near an end of the protective support layer are formed as the connection structure.
6. The flexible display module of claim 1, wherein the protective support layer covers at least the display area and the bonding area.
7. A scrolling display device, comprising:
the shell is provided with a fixed part and a movable part arranged on one side of the fixed part, the movable part can move relative to the fixed part, the fixed part is provided with a first supporting surface, the movable part is provided with a second supporting surface, and the first supporting surface is flush with the second supporting surface;
the flexible display module of any one of claims 1-6, at least a portion of the display area covering the first support surface and the second support surface;
the reel is connected to the moving part, and the flexible display module is in contact with the reel and can slide around the reel;
the driving device is arranged on the fixed part of the shell and comprises a power source and a transmission device, and the connecting structure of the protection supporting layer is connected with the transmission device so that the power source drives the end part of the flexible display module to move through the transmission device.
8. The sliding roll display device according to claim 7, wherein the power source is a motor, the transmission device comprises a screw rod connected with the motor, and a sliding connection unit sleeved on the screw rod, and the connection structure on the protective supporting layer is connected with the sliding connection unit.
9. The slider-roll display device according to claim 8, wherein the length of the sliding connection unit is equal to the width of the protective support layer.
10. The slider display of claim 7 wherein the radius of the roller is greater than 4mm.
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| CN202211140978.9A CN115331568A (en) | 2022-09-20 | 2022-09-20 | Flexible display module and sliding roll display device |
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