Sliding and rolling display device

Abstract

The utility model relates to the technical field of display, and discloses a sliding and rolling display device. The sliding and rolling display device comprises a flexible display module and a driving mechanism, the flexible display module comprises a flexible display panel and a supporting plate. The flexible display panel is provided with a display side and a non-display side which are oppositely arranged; the supporting plate is arranged on the non-display side of the flexible display panel, a plurality of grooves extending in the first direction are formed in the face, away from the flexible display panel, of the supporting plate, the grooves are arranged into at least one groove row in the second direction, the first direction is parallel to the supporting plate, and the second direction is parallel to the sliding and rolling direction of the flexible display module. The second direction intersects with the first direction; the driving mechanism comprises a driving gear and a driving assembly, the driving gear is meshed with the groove row, the driving assembly is connected to the driving gear, and the driving assembly is used for driving the driving gear to rotate so as to drive the flexible display module to slide and roll. The sliding and rolling display device is high in flatness during unfolding and rolling, long in service life and stable in work.

Description

Technical Field

[0001] The present disclosure relates to the field of display technologies, and in particular, to a rollable display device. Background Art

[0002] In the era of rapid technological progress today, as the window for information presentation, the development level of display devices directly affects the functionality of electronic devices and the user experience. Especially with the rise of the Internet of Things, smart home, wearable devices, and autonomous driving technologies, higher requirements are put forward for the form, flexibility, and intelligence of display devices.

[0003] Organic Light-Emitting Display (OLED) panels have become the mainstream development direction in the field of display technologies due to their advantages of self-luminescence, high brightness, good image quality, low power consumption, wide viewing angle, and bendability, and are widely used in consumer electronic products such as mobile phones, wearables, and vehicles.

[0004] However, the current rollable display devices cannot meet the relatively high performance requirements of users.

[0005] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present disclosure, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Utility Model

[0006] The purpose of the present disclosure is to overcome the deficiencies of the above-mentioned prior art and provide a rollable display device.

[0007] According to one aspect of the present disclosure, a rollable display device is provided, including:

[0008] A flexible display module, including a flexible display panel and a support plate; the flexible display panel has a display side and a non-display side disposed opposite to each other; the support plate is disposed on the non-display side of the flexible display panel, and a plurality of grooves extending in a first direction are provided on a surface of the support plate facing away from the flexible display panel, and the plurality of grooves are arranged in at least one column of groove columns in a second direction, the first direction is parallel to the support plate, the second direction is parallel to the rolling direction of the flexible display module, and intersects with the first direction;

[0009] A driving mechanism, including a driving gear and a driving component, the driving gear meshes with the column of grooves, the driving component is connected to the driving gear, and the driving component is used to drive the driving gear to rotate, thereby driving the flexible display module to roll.

[0010] In an exemplary embodiment of the present disclosure, the driving mechanism further includes:

[0011] A buffer layer is provided on at least a part of the tooth surface of the driving gear, and the modulus of the buffer layer is less than that of the driving gear.

[0012] In an exemplary embodiment of the present disclosure, the driving assembly includes:

[0013] A driving motor having a driving shaft;

[0014] A speed reducer connected between the driving shaft and the driving gear.

[0015] In an exemplary embodiment of the present disclosure, the speed reducer includes:

[0016] A first gear connected to the driving shaft;

[0017] At least two second gears meshing with the outer periphery of the first gear, the diameter of the second gear being greater than that of the first gear, the driving gear being a toothed ring, an internal tooth being provided on the inner side of the driving gear, an external tooth being provided on the outer side of the toothed ring, and at least two of the second gears meshing with the internal tooth;

[0018] A cage, at least two of the second gears being rotatably connected to the cage.

[0019] In an exemplary embodiment of the present disclosure, the number of the groove columns is at least two, the number of the driving gears is the same as the number of the groove columns, and the driving assembly includes a first driving assembly, and one first driving assembly drives at least two of the driving gears.

[0020] In an exemplary embodiment of the present disclosure, the number of the groove columns is an even number, the first driving assembly includes a first driving motor having two relatively arranged first driving shafts, and the two first driving shafts are respectively connected to the two driving gears in a one-to-one correspondence;

[0021] Alternatively, the number of the groove columns is an odd number greater than one, the first driving assembly includes a first driving motor having two relatively arranged first driving shafts, and the two first driving shafts are respectively connected to the two driving gears in a one-to-one correspondence; the number of the driving assemblies is at least two, and the driving assembly further includes a second driving assembly, and the second driving assembly includes a second driving motor, and a second driving shaft of the second driving motor is connected to one of the driving gears.

[0022] In an exemplary embodiment of the present disclosure, the scroll display device further includes:

[0023] A connecting shaft connected between two adjacent driving gears, and at least one connecting shaft is provided to connect at least two driving gears in series.

[0024] In an exemplary embodiment of the present disclosure, the first driving assembly is provided as one; the first driving assembly includes a first driving motor, the first driving motor has a first driving shaft, and the first driving shaft is connected to at least two of the driving gears connected in series in sequence; alternatively, the first driving assembly includes a first driving motor, the first driving motor has two first driving shafts arranged oppositely, and at least one of the first driving shafts is connected to at least two of the driving gears connected in series in sequence.

[0025] In an exemplary embodiment of the present disclosure, the included angle between the first direction and the second direction is greater than or equal to 30° and less than 90°, and the driving gear is a helical gear; alternatively, the first direction is perpendicular to the second direction, and the driving gear is a spur gear.

[0026] In an exemplary embodiment of the present disclosure, when the number of the groove columns is an even number, the extending directions of the grooves in different groove columns are symmetrically arranged, and the symmetry axis is the central axis of the support plate extending in the second direction; alternatively, when the number of the groove columns is an odd number greater than one, the extending direction of the grooves in the groove column in the middlemost position is perpendicular to the second direction, and the extending directions of the grooves in different groove columns on both sides are symmetrically arranged, and the symmetry axis is the central axis of the support plate extending in the second direction.

[0027] In an exemplary embodiment of the present disclosure, the groove column includes a flattening groove column, the flattening groove column is provided as an even number of columns, and the extending direction of the grooves in the flattening groove column has an included angle greater than or equal to 30° and less than 90° with the second direction, and the extending directions of the grooves in different flattening groove columns are symmetrically arranged, and the symmetry axis is the central axis of the support plate extending in the second direction.

[0028] In an exemplary embodiment of the present disclosure, the sliding and rolling display device further includes:

[0029] A heat insulation layer, which is arranged on the side of the support plate facing away from the flexible display panel and is located between the driving assembly and the flexible display module.

[0030] In an exemplary embodiment of the present disclosure, the sliding and rolling display device further includes:

[0031] A housing, two guide grooves are arranged in the housing, and the two guide grooves are arranged oppositely in the third direction;

[0032] Two sliding parts are slidably engaged with the two guide grooves in a one-to-one correspondence. The two sliding parts are fixedly arranged on the opposite sides of the flexible display module in the third direction. The third direction is parallel to the support plate and perpendicular to the second direction.

[0033] In an exemplary embodiment of the present disclosure, the surface roughness of the sliding part is greater than or equal to 0.1 μm and less than or equal to 0.3 μm, and the surface roughness of the guide groove is greater than or equal to 0.1 μm and less than or equal to 0.3 μm.

[0034] In an exemplary embodiment of the present disclosure, the guide groove includes:

[0035] A first part extending along the second direction;

[0036] A second part smoothly connected to the first part, and the second part is arranged in an arc shape;

[0037] A third part smoothly connected to the second part, the third part extends along the second direction, and the first part and the third part are located on the same side of the second part.

[0038] In an exemplary embodiment of the present disclosure, the width of the notch part of the guide groove is smaller than the width of the bottom part of the guide groove, and the sliding part is arranged in a structure adapted to the guide groove.

[0039] In an exemplary embodiment of the present disclosure, the support plate includes:

[0040] A body part;

[0041] A plurality of convex strips fixed on the side of the body part facing away from the flexible display panel, and the groove is formed between two adjacent convex strips.

[0042] In an exemplary embodiment of the present disclosure, the flexible display module further includes:

[0043] A circuit board connected to the flexible display panel and bent on the side of the support plate facing away from the flexible display panel. The orthographic projection of the circuit board on the support plate does not overlap with the groove.

[0044] In an exemplary embodiment of the present disclosure, the edge of the groove is provided with a chamfer.

[0045] In an exemplary embodiment of the present disclosure, the flexible display module includes a bending part and two flat parts. The two flat parts are connected to the opposite sides of the bending part, and the driving gear is at least engaged with the bending part of the flexible display module.

[0046] On the one hand, for the rollable display device of the present disclosure, by providing a groove on the support plate, the stress generated during the bending of the support plate can be reduced, and the wrinkles and deformations of the flexible display panel can be alleviated or even avoided, thereby improving the flatness of the flexible display panel during unfolding and curling. On the other hand, through the cooperation of the driving gear and the groove to form a gear-rack transmission structure, the transmitted power is large and the reliability is high, so that the rollable display device can be applied to various scenarios. Moreover, the transmission structure of the driving gear and the groove has a long service life and stable operation, thereby improving the service life and working stability of the rollable display device.

[0047] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0049] Figure 1 It is a schematic structural diagram of an exemplary embodiment of a flexible display module in the rollable display device of the present disclosure.

[0050] Figure 2 It is a partial structural schematic diagram of a first exemplary embodiment of the rollable display device of the present disclosure.

[0051] Figure 3 It is a partial structural schematic diagram of a second exemplary embodiment of the rollable display device of the present disclosure.

[0052] Figure 4 It is a partial structural schematic diagram of a third exemplary embodiment of the rollable display device of the present disclosure.

[0053] Figure 5 It is a schematic structural diagram of the housing of the rollable display device of the present disclosure.

[0054] Figure 6 It is Figure 5 a schematic structural diagram of the cooperation between the guide groove 52 and the sliding part 6 in

[0055] Figure 7 It is Figures 2 - 3 a partial structural schematic diagram of the driving component in

[0056] Figure 8 It is a partial structural schematic diagram of a fourth exemplary embodiment of the rollable display device of the present disclosure.

[0057] Figure 9Schematic diagram of the partial structure of the fifth exemplary embodiment of the rollable display device disclosed in the present disclosure.

[0058] Figure 10 Schematic diagram of the partial structure of the sixth exemplary embodiment of the rollable display device disclosed in the present disclosure.

[0059] Figure 11 Schematic diagram of the partial structure of the seventh exemplary embodiment of the rollable display device disclosed in the present disclosure.

[0060] Figure 12 Schematic diagram of the partial structure of the eighth exemplary embodiment of the rollable display device disclosed in the present disclosure.

[0061] Figure 13 Schematic diagram of the partial structure of the ninth exemplary embodiment of the rollable display device disclosed in the present disclosure.

[0062] Figure 14 Schematic diagram of the partial structure of the tenth exemplary embodiment of the rollable display device disclosed in the present disclosure.

[0063] Figure 15 Schematic diagram of the partial structure of the eleventh exemplary embodiment of the rollable display device disclosed in the present disclosure.

[0064] Figure 16 Schematic diagram of the partial structure of the twelfth exemplary embodiment of the rollable display device disclosed in the present disclosure.

[0065] Figure 17 Schematic diagram of the partial structure of the thirteenth exemplary embodiment of the rollable display device disclosed in the present disclosure.

[0066] Figure 18 Schematic diagram of the partial structure of the fourteenth exemplary embodiment of the rollable display device disclosed in the present disclosure.

[0067] Figure 19 Schematic diagram of the structure of the flexible display module in the initial state (not unfolded) of the rollable display device disclosed in the present disclosure.

[0068] Figure 20 Schematic diagram of the structure of the flexible display module in the operating state (unfolding process) of the rollable display device disclosed in the present disclosure.

[0069] Figure 21 Schematic diagram of the structure of the flexible display module in the unfolded state of the rollable display device disclosed in the present disclosure.

[0070] Figure 22 Schematic diagram of the structure of another exemplary embodiment of the flexible display module in the unfolded state of the rollable display device disclosed in the present disclosure.

[0071] Figure 23 Schematic diagram of the partial structure of the fifteenth exemplary embodiment of the rollable display device disclosed in the present disclosure.

[0072] Figure 24 This is a partial structural schematic diagram of the sixteenth exemplary embodiment of the disclosed sliding scroll display device.

[0073] Figure 25 This is a partial structural schematic diagram of the seventeenth exemplary embodiment of the disclosed sliding scroll display device.

[0074] Figure 26 This is a partial structural schematic diagram of the eighteenth exemplary embodiment of the disclosed sliding scroll display device.

[0075] Figure 27 This is a partial structural schematic diagram of the nineteenth exemplary embodiment of the disclosed sliding scroll display device.

[0076] Figure 28 This is a partial structural schematic diagram of the twentieth exemplary embodiment of the disclosed sliding scroll display device.

[0077] Figure 29 This is a partial structural schematic diagram of the twenty - first exemplary embodiment of the disclosed sliding scroll display device.

[0078] Figure 30 This is a partial structural schematic diagram of the twenty - second exemplary embodiment of the disclosed sliding scroll display device.

[0079] Figure 31 This is a partial structural schematic diagram of the twenty - third exemplary embodiment of the disclosed sliding scroll display device.

[0080] Explanation of reference numerals:

[0081] 1. Flexible display module; 1W. Bending part; 1P. Flat part; 11. Flexible display panel; 12. Support plate; 121. Body part; 122. Rib; 123. Groove column; 123P. Flattened groove column; 1231. Groove;

[0082] 13. COF (Chip - on - Film); 14. Display driver chip; 15. Circuit board; 15a. Printed circuit board; 16. Adhesive;

[0083] 171. First double - sided foam tape; 172. Second double - sided foam tape;

[0084] 18. Polarizer; 19. Cover plate; 110. Adhesive layer;

[0085] 2. Driving mechanism; 21. Driving component; 21a. First driving component; 21b. Second driving component; 211. Driving motor; 211a. First driving motor; 211b. Second driving motor; 2111. Driving shaft; 2111a. First driving shaft; 212. Reducer; 2121. First gear; 2122. Second gear; 2123. Cage; 22. Driving gear; 23. Buffer layer;

[0086] 3. Connecting shaft; 4. Heat insulation layer;

[0087] 5. Outer shell; 51. Window; 52. Guide groove; 521. First part; 522. Second part; 523. Third part; 53. Opening; 54. First sleeve; 55. Second sleeve;

[0088] 6. Sliding part;

[0089] AA. Display area; NAA. Non-display area; BOD. Bonding area;

[0090] X. First direction; Y. Second direction; M. Third direction. Detailed implementation manners

[0091] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals in the figures denote like or similar structures, and thus their detailed descriptions will be omitted. In addition, the drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0092] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of the icon to another component, these terms are used in this specification only for convenience, for example, according to the directions of the examples described in the accompanying drawings. It can be understood that if the device of the icon is turned upside down, the component described as "upper" will become the component described as "lower". When a structure is "on" another structure, it may mean that a structure is integrally formed on another structure, or that a structure is "directly" provided on another structure, or that a structure is "indirectly" provided on another structure through another structure.

[0093] The terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "comprising" and "having" are used to mean an open inclusion and refer to the possibility of the existence of additional elements / components / etc. in addition to the listed elements / components / etc.; the terms "first", "second", "third", etc. are used only as labels and do not limit the quantity of their objects.

[0094] In this application, unless otherwise clearly specified and defined, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral one; it can be directly connected or indirectly connected through an intermediate medium. "And / or" is merely a description of the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in this text, the character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0095] The exemplary embodiments of the present disclosure provide a scroll display device. Referring to Figures 1 - 31 as shown, the scroll display device may include a flexible display module 1 and a driving mechanism 2; the flexible display module 1 may include a flexible display panel 11 and a support plate 12; the flexible display panel 11 has a display side and a non-display side arranged opposite to each other; the support plate 12 is disposed on the non-display side of the flexible display panel 11, and a plurality of grooves 1231 extending in a first direction X are provided on a surface of the support plate 12 facing away from the flexible display panel 11, and the plurality of grooves 1231 are arranged in at least one row of groove rows 123 in a second direction Y. The first direction X is parallel to the support plate 12, the second direction Y is parallel to the scrolling direction of the flexible display module 1, and intersects the first direction X; the driving mechanism 2 may include a driving gear 22 and a driving component 21. The driving gear 22 meshes with the groove row 123, and the driving component 21 is connected to the driving gear 22. The driving component 21 is used to drive the driving gear 22 to rotate, thereby driving the flexible display module 1 to scroll.

[0096] For the scroll display device of the present disclosure, on the one hand, by providing the grooves 1231 on the support plate 12, the stress generated during bending of the support plate 12 can be reduced, and the defects of wrinkles and deformations of the flexible display panel 11 can be alleviated or even avoided, thereby improving the flatness of the flexible display panel 11 during unfolding and curling; on the other hand, through the cooperation of the driving gear 22 and the grooves 1231 to form a gear-rack transmission structure, the transmitted power is large and the reliability is relatively high, so that the scroll display device can be applied to various scenarios, and the transmission structure of the driving gear 22 and the grooves 1231 has a long service life and operates stably, thereby improving the service life and operating stability of the scroll display device.

[0097] In the present exemplary embodiment, the flexible display panel 11 may be an OLED (Organic Electroluminescence Display) display panel, a QLED (Quantum Dot Light Emitting Diodes) display panel, etc.; the flexible display panel 11 has a display side and a non-display side, the display side and the non-display side are oppositely arranged, and a picture can be displayed on the display side. The side for displaying the picture is the display surface, and the side opposite to the display surface is the non-display surface.

[0098] The flexible display panel 11 may include a substrate substrate, a driving substrate, a light-emitting substrate, a packaging layer group, and a touch layer group. The driving substrate can drive the light-emitting substrate to emit light. The driving substrate is disposed on one side of the substrate substrate, and the light-emitting substrate is disposed on the side of the driving substrate away from the substrate substrate; the driving substrate may include a plurality of driving circuits arranged in an array, and the light-emitting substrate may include a plurality of light-emitting devices arranged in an array. The driving circuit can drive the light-emitting device to emit light. A packaging layer group is disposed on the side of the light-emitting substrate away from the substrate substrate, and the packaging layer group can block water and oxygen to prevent the driving substrate and the light-emitting substrate from being corroded by water and oxygen; a touch layer group is disposed on the side of the packaging layer group away from the substrate substrate, and the touch layer group enables the flexible display panel 11 to achieve a touch function.

[0099] Of course, in some other exemplary embodiments of the present disclosure, the touch layer group may not be provided; in the case where the touch layer group is not provided, an external touch module may also be provided.

[0100] Referring to Figure 1 As shown, the flexible display panel 11 has a display area AA and a non-display area NAA. The non-display area NAA may include a bonding area BOD. In the bonding area BOD, a flip chip film 13 may be bonded through an anisotropic conductive adhesive. A display driving chip 14 may be disposed on the flip chip film 13. One end of the flip chip film 13 away from the flexible display panel 11 may be connected to a circuit board 15. The circuit board 15 may be a printed circuit board 15a. Various components and connecting wires may be disposed on the printed circuit board 15a. The flip chip film 13 can be bent so that one end of the flip chip film 13 away from the flexible display panel 11 can be bent to the non-display side of the flexible display panel 11, and the printed circuit board 15a is also located on the non-display side of the flexible display panel 11.

[0101] In addition, in some other exemplary embodiments of the present disclosure, a flexible printed circuit board may be used to replace the chip-on-film 13, and the flexible printed circuit board is included in the circuit board 15; the chip-on-film 13 and the flexible printed circuit board may also not be provided. Since the flexible display panel 11 itself can be bent, that is, the non-display area NAA may include a bending area and a bonding area BOD. The bending area may be connected between the display area AA and the bonding area BOD. In the bonding area BOD, a circuit board 15 may be bonded through an anisotropic conductive adhesive. The circuit board 15 may be a printed circuit board 15a. The bending area may be bent so that the printed circuit board 15a is located on the non-display side of the flexible display panel 11.

[0102] Referring to Figure 1 As shown, a support plate 12 is bonded to the non-display side of the flexible display panel 11 through an adhesive 16, that is, the support plate 12 is bonded to the non-display surface of the flexible display panel 11 through the adhesive 16. The material of the adhesive 16 may be a pressure-sensitive adhesive (PSA for short). The flexible display panel 11 can be supported by the support plate 12.

[0103] Referring to Figure 1 As shown, a first double-sided foam tape 171 is provided on the side of the support plate 12 facing away from the flexible display panel 11. One adhesive surface of the first double-sided foam tape 171 is bonded to the support plate 12, and the other opposite adhesive surface of the first double-sided foam tape 171 is bonded to the printed circuit board 15a. The printed circuit board 15a can be fixed by the first double-sided foam tape 171, and the first double-sided foam tape 171 has a certain elasticity, which can reduce or even avoid the pressure of the printed circuit board 15a on the flexible display panel 11, and reduce or even avoid the generation of imprints on the flexible display panel 11 to ensure the display effect.

[0104] A second double-sided foam tape 172 is provided on the side of the support plate 12 facing away from the flexible display panel 11. One adhesive surface of the second double-sided foam tape 172 is bonded to the support plate 12, and the other opposite adhesive surface of the second double-sided foam tape 172 is bonded to the chip-on-film 13. The chip-on-film 13 can be fixed by the second double-sided foam tape 172, and the second double-sided foam tape 172 has a certain elasticity, which can reduce or even avoid the pressure of the display driving chip 14 on the chip-on-film 13 on the flexible display panel 11, and reduce or even avoid the generation of imprints on the flexible display panel 11 to ensure the display effect. Moreover, a recess may be provided on the second double-sided foam tape 172, and the recess can accommodate the display driving chip 14, further reducing or even avoiding the generation of imprints on the flexible display panel 11 to ensure the display effect.

[0105] A polarizer 18 may be provided on the display side of the flexible display panel 11, that is, the polarizer 18 may be provided on the display surface of the flexible display panel 11; a cover plate 19 may be provided on the side of the polarizer 18 facing away from the flexible display panel 11, and the cover plate 19 may be bonded to the polarizer 18 through an adhesive layer 110, and the material of the adhesive layer 110 may be OCA (Optically Clear Adhesive) optical glue.

[0106] Referring to Figures 2 - 4 As shown, in the present exemplary embodiment, a plurality of grooves 1231 extending in the first direction X are provided on the surface of the support plate 12 facing away from the flexible display panel 11, and the plurality of grooves 1231 are arranged in at least one row of groove rows 123 in the second direction Y. For example, the plurality of grooves 1231 may be arranged in one row of groove rows 123 in the second direction Y. Referring to Figure 2 As shown, the plurality of grooves 1231 may be arranged in two rows of groove rows 123 in the second direction Y. Referring to Figure 3 As shown, the plurality of grooves 1231 may be arranged in three rows of groove rows 123 in the second direction Y. Referring to Figure 4 As shown, the plurality of grooves 1231 may be arranged in four rows of groove rows 123 in the second direction Y. Of course, the plurality of grooves 1231 may be arranged in more rows of groove rows 123 in the second direction Y, which will not be elaborated one by one here.

[0107] The first direction X is parallel to the support plate 12, the second direction Y is also parallel to the support plate 12, and the second direction Y is parallel to the sliding and winding direction of the flexible display module 1. The first direction X intersects the second direction Y. For example, in Figures 2 - 4 the first direction X is perpendicular to the second direction Y, and in Figures 8 - 10 the included angle between the first direction X and the second direction Y is an acute angle.

[0108] It should be noted that the sliding and winding direction of the flexible display module 1 is the direction in which the flexible display module 1 unfolds and winds up.

[0109] By providing the grooves 1231 on the support plate 12, the stress generated when the support plate 12 is bent can be reduced, and the defects of wrinkles and deformation of the flexible display panel 11 can be reduced or even avoided, thereby improving the flatness of the flexible display panel 11 when it unfolds and curls.

[0110] Chamfers are provided on the edges of the grooves 1231 to prevent the edges of the grooves 1231 from interfering with the teeth of the driving gear 22, resulting in scratches on the teeth of the driving gear 22 and affecting the service life of the driving gear 22. Specifically, the support plate 12 between two adjacent grooves 1231 is equivalent to the teeth of a rack, and the support plate 12 between two adjacent grooves 1231 may be provided with a tooth-shaped structure adapted to the teeth of the driving gear 22.

[0111] In the present exemplary embodiment, referring to Figures 2 - 4 As shown, the driving mechanism 2 may include a driving gear 22 and a driving component 21. The driving gear 22 meshes within the groove 1231, such that the support plate 12 is equivalent to a rack meshing with the driving gear 22, and the groove 1231 is equivalent to the tooth groove of the rack.

[0112] The driving component 21 is connected to the driving gear 22. The driving component 21 is configured to drive the driving gear 22 to rotate. The rotation of the driving gear 22 drives the support plate 12 and the flexible display panel 11 fixed to the support plate 12 to slide along the second direction Y, thereby realizing the unfolding and winding of the flexible display panel 11.

[0113] Through the cooperation of the driving gear 22 and the groove 1231 to form a gear-rack transmission structure, which has a large power transmission and high reliability, enabling the rollable display device to be applicable to various scenarios. For example, it can be used in the interior of smart cars: in the car dashboard, center console, door, or rear-seat entertainment system, the rollable display device can be extended or retracted as needed to provide a customized information display and entertainment experience while optimizing the use of in-vehicle space; it can be used in mobile devices: mobile devices such as smartphones, tablets, and foldable laptops to achieve flexible changes in screen size, which is convenient for carrying and meets the needs of large-screen viewing and operation; it can be used in smart homes: rollable screens are embedded in smart speakers, home security monitors, or smart home appliances, which can be intelligently unfolded or hidden according to the situation to enhance the convenience and technological sense of home life; it can be used in wearable devices: wearable products such as watches and bracelets, through the rollable technology, can provide a larger display area without increasing the wearing volume, enriching information display and interaction methods; moreover, the transmission structure of the driving gear 22 and the groove 1231 has a long service life and stable operation, thereby improving the service life and working stability of the rollable display device.

[0114] In the present exemplary embodiment, referring to Figure 5As shown, the scrollable display device may further include a housing 5. A window 51 is provided on the housing 5. The flexible display panel 11 is opposite to the window 51. Users can view the display screen of the flexible display panel 11 through the window 51. Moreover, the flexible display panel 11 can extend and unfold from one side of the window 51 to increase the display area. Specifically, an opening 53 is also provided on the housing 5. The opening 53 is integrally connected to the window 51 and is perpendicular to each other. A first sleeve 54 and a second sleeve 55 are further provided inside the housing 5. Both the first sleeve 54 and the second sleeve 55 are provided as rectangular tubes. The first sleeve 54 is sleeved outside the second sleeve 55. A flexible display module 1 is fixed on the first sleeve 54. Moreover, the first sleeve 54 can be pulled out from the opening 53 along the second direction Y, so that the flexible display module 1 can extend from the opening 53 along the second direction Y, thereby driving the flexible display module 1 to unfold. Of course, the first sleeve 54 can be retracted into the housing 5 from the opening 53 along the second direction Y, thereby driving the flexible display module 1 to roll up.

[0115] In some exemplary embodiments of the present disclosure, a linear motor may be provided to drive the first sleeve 54 to move along the second direction Y, so as to realize the unfolding and rolling up of the flexible display module 1. The linear speed of the linear motor needs to be the same as the linear speed of the driving assembly 21. Of course, the first sleeve 54 can also be manually pulled out from the opening 53 along the second direction Y.

[0116] Optionally, referring to Figure 5 As shown, two guide grooves 52 may be provided inside the housing 5. The two guide grooves 52 are oppositely arranged in the third direction. Specifically, the two guide grooves 52 are respectively arranged on two inner side walls of the housing 5 that are oppositely arranged in the third direction. The guide grooves 52 extend along the second direction Y, that is, the guide grooves 52 extend along the scroll direction of the flexible display module 1.

[0117] Referring to Figures 2 - 4 As shown, two sliding parts 6 are respectively and correspondingly fixed on opposite sides of the flexible display module 1 in the third direction M. That is, a sliding part 6 is fixed on one side of the flexible display module 1 in the third direction M. Since the flexible display module 1 has opposite sides in the third direction M, two sliding parts 6 need to be fixed.

[0118] The two sliding parts 6 are respectively and correspondingly slidably engaged in the two guide grooves 52, that is, the sliding part 6 can slide in the guide groove 52. During the unfolding or rolling up of the flexible display module 1, the cooperation between the guide groove 52 and the sliding part 6 provides a guiding function for the unfolding or rolling up of the flexible display module 1, avoiding the offset of the flexible display module 1 during unfolding or rolling up, and ensuring the stability of the unfolding or rolling up of the flexible display module 1.

[0119] It should be noted that the third direction M is parallel to the support plate 12, that is, the third direction M is parallel to the side of the support plate 12 where the flexible display panel 11 is provided, and the third direction M is perpendicular to the second direction Y. In Figures 2 - 4 the third direction M is the same as the first direction X.

[0120] Specifically, please continue to refer to Figure 5 As shown, the guide groove 52 may include a first part 521, a second part 522, and a third part 523 that are smoothly connected in sequence. The first part 521 extends along the second direction Y, that is, the first part 521 extends along the winding direction of the flexible display module 1, and the first part 521 is set to be linear; the second part 522 is smoothly connected to the first part 521, and the second part 522 is set to be arc-shaped. For example, the second part 522 is set to be semi-circular arc-shaped, and the second part 522 and the first part 521 may be externally tangent;

[0121] The third part 523 is smoothly connected to the second part 522. For example, the third part 523 and the second part 522 may be externally tangent; the third part 523 extends along the second direction Y, that is, the third part 523 extends along the winding direction of the flexible display module 1. Moreover, the first part 521 and the third part 523 are located on the same side of the second part 522, so that the guide groove 52 can be set in a lying "U" shape. When the flexible display module 1 also forms a lying "U" shape in the wound state, the two sliding parts 6 on both sides of the flexible display module 1 are both located in the two guide grooves 52, and the guide groove 52 can play a supporting role for the flexible display module 1; moreover, during the process of the flexible display module 1 being wound and unfolded, the guide groove 52 can also play a supporting role for the flexible display module 1 as much as possible.

[0122] Referring to Figures 2 - 4 As shown, the sliding part 6 may be set as an integral structure along the edge of the flexible display module 1. Of course, in some other exemplary embodiments of the present disclosure, the sliding part 6 may also be set as a plurality of disconnected strip-shaped structures. By setting like this, the contact area between the sliding part 6 and the guide groove 52 can be reduced, thereby reducing the frictional resistance between the sliding part 6 and the guide groove 52, making the movement of the flexible display module 1 during unfolding and winding smoother, and at the same time further suppressing the running noise and improving the quietness of the overall operation.

[0123] In some exemplary embodiments of the present disclosure, referring to Figure 6As shown, the guiding groove 52 is configured such that the width of the groove opening portion is smaller than the width of the groove bottom portion. For example, the guiding groove 52 can be configured as a dovetail groove; correspondingly, the sliding portion 6 can be configured as a structure adapted to the guiding groove 52. For example, the sliding portion 6 can be configured as a trapezoidal sliding portion 6. With such a setting, the sliding portion 6 will not come out of the guiding groove 52, ensuring the guiding function of the guiding groove 52 and the sliding portion 6 for the flexible display module 1; moreover, the guiding groove 52 and the sliding portion 6 have a flattening effect on the flexible display module 1, avoiding defects such as wrinkles and deformations of the flexible display module 1, thereby improving the flatness of the flexible display module 1 when it is unfolded and curled. Of course, the guiding groove 52 can also be configured as a rectangular groove, and the width of the groove opening portion of the rectangular groove is smaller than the width of the groove bottom portion. The sliding portion 6 can be configured as a rectangular guide rail, and the width of the connecting portion connecting the rectangular guide rail and the flexible display module 1 is smaller than the width of the rectangular guide rail, and the connecting portion is fitted in the groove opening portion.

[0124] In some exemplary embodiments of the present disclosure, the surface roughness of the sliding portion 6 is greater than or equal to 0.1 and less than or equal to 0.3. For example, the surface roughness of the sliding portion 6 can be 0.12, 0.15, 0.17, 0.2, 0.23, 0.25, 0.28, etc.

[0125] If the surface roughness of the sliding portion 6 is too small, it is difficult to achieve in the process, thereby increasing the manufacturing cost.

[0126] If the surface roughness of the sliding portion 6 is too large, the frictional resistance between the sliding portion 6 and the guiding groove 52 is too large, making the movement of the flexible display module 1 during unfolding and winding not smooth. At the same time, it also increases the operating noise and reduces the quietness of the overall operation.

[0127] The above numerical range is not only easy to achieve in the process and has a low manufacturing cost; moreover, the frictional resistance between the sliding portion 6 and the guiding groove 52 is small, making the movement of the flexible display module 1 during unfolding and winding smoother. At the same time, it also further suppresses the operating noise and improves the quietness of the overall operation.

[0128] The surface roughness of the guiding groove 52 is greater than or equal to 0.1 and less than or equal to 0.3. For example, the surface roughness of the guiding groove 52 can be 0.12, 0.15, 0.17, 0.2, 0.23, 0.25, 0.28, etc.

[0129] Similarly, if the surface roughness of the guiding groove 52 is too small, it is difficult to achieve in the process, thereby increasing the manufacturing cost.

[0130] If the surface roughness of the guiding groove 52 is too large, the frictional resistance between the sliding portion 6 and the guiding groove 52 is too large, making the movement of the flexible display module 1 during unfolding and winding not smooth. At the same time, it also increases the operating noise and reduces the quietness of the overall operation.

[0131] The above numerical range is not only easy to achieve in terms of technology and has a relatively low preparation cost, but also has a relatively small frictional resistance between the sliding portion 6 and the guide groove 52, making the movement of the flexible display module 1 smoother during unfolding and winding. At the same time, it further suppresses the operating noise and improves the quietness of the overall operation.

[0132] It should be noted that the unit of the above surface roughness is micrometer (μm), and the above surface roughness may be the arithmetic mean deviation of the profile Ra.

[0133] In some exemplary embodiments of the present disclosure, referring to Figures 2 - 4 , Figure 7 As shown, the driving assembly 21 may include a driving motor 211 and a speed reducer 212; the driving motor 211 has a driving shaft 2111, and the main body of the driving motor 211 can be fixed in the housing 5 through a bracket, so that the main body of the driving motor 211 cannot move when the driving shaft 2111 rotates. The speed reducer 212 is connected between the driving shaft 2111 and the driving gear 22. Since the unfolding and winding speeds of the flexible display module 1 do not need to be too large, the speed reducer 212 can reduce the rotational speed output by the driving motor 211, which is beneficial to the selection of the driving motor 211 and thus reduces the cost.

[0134] For example, the speed reducer 212 may include a first gear 2121, a second gear 2122, and a cage 2123 (the first gear 2121 and the second gear 2122 are shown in a simplified drawing without showing the teeth). The first gear 2121 is an external gear and is fixedly connected to the driving shaft 2111 of the driving motor 211. The second gear 2122 is provided with at least two, for example, the second gear 2122 may be provided with three. The second gear 2122 is an external gear, and the three second gears 2122 are all meshed with the outer periphery of the first gear 2121, and the three second gears 2122 are evenly distributed. The three second gears 2122 are rotatably connected to the cage 2123. For example, the cage 2123 may be provided as a triangular frame, and three fixed shafts are provided at the three vertex portions of the cage 2123, and bearings are provided on the fixed shafts, and the second gear 2122 is sleeved on the bearing, so that the second gear 2122 is rotatably connected to the cage 2123.

[0135] In this case, the driving gear 22 is provided as a toothed ring, and internal teeth are provided on the inner side of the toothed ring (not shown in the figure), and external teeth are provided on the outer side of the toothed ring. The three second gears 2122 are meshed with the internal teeth, and the external teeth of the toothed ring are meshed with the groove 1231.

[0136] The driving motor 211 rotates to drive the first gear 2121 to rotate. The second gear 2122 rotates along the first gear 2121 under the support of the cage 2123. The diameter of the second gear 2122 is larger than that of the first gear 2121, achieving the first deceleration. At the same time, the second gear 2122 meshes with the internal teeth of the driving gear 22, transmitting the power to the driving gear 22, thereby realizing power transmission and achieving the second deceleration. By transmitting the torque through at least two second gears 2122, it has a high transmission efficiency, low noise, good stability and reliability, can achieve high torque output in a limited space, and is suitable for various harsh working environments. Thus, even under high load conditions, the sliding and rolling display device still has a coherent and powerful sliding and rolling action; moreover, it has better quietness and can adapt to various harsh working environments.

[0137] Certainly, in some other exemplary embodiments of the present disclosure, the second gear 2122 can be provided with two or more, and correspondingly, the cage 2123 can be provided in a strip shape or various polygon frames. The speed reducer 212 can also adopt other gear speed reducers 212, worm speed reducers 212, etc., which will not be elaborated here one by one.

[0138] In some exemplary embodiments of the present disclosure, referring to Figure 7 as shown, the driving mechanism 2 may further include a buffer layer 23. The buffer layer 23 is provided on at least part of the tooth surface of the driving gear 22. For example, the buffer layer 23 can be provided on the entire tooth surface of the driving gear 22, that is, the buffer layer 23 can be provided on the tooth surface (the side surface between the tooth top cylindrical surface and the tooth root cylindrical surface), the tooth top cylindrical surface and the tooth root cylindrical surface of the driving gear 22; the buffer layer 23 can also be provided on part of the tooth surface of the driving gear 22, that is, the buffer layer 23 can be provided on the tooth surface and the tooth top cylindrical surface of the driving gear 22.

[0139] The modulus of the buffer layer 23 is less than that of the driving gear 22. Specifically, the elastic modulus of the buffer layer 23 is less than the elastic modulus of the driving gear 22.

[0140] The elastic modulus can be regarded as an index to measure the difficulty of a material to produce elastic deformation. The larger its value, the greater the stress required to cause a certain elastic deformation of the material, that is, the greater the stiffness of the material. That is, under a certain stress, the elastic deformation is smaller. The elastic modulus refers to the stress required for a material to produce unit elastic deformation under the action of an external force. It is an index reflecting the ability of a material to resist elastic deformation, equivalent to the stiffness in an ordinary spring.

[0141] The elastic modulus of the buffer layer 23 is less than that of the driving gear 22, making the buffer layer 23 more prone to deformation. Through the buffer layer 23, the tiny vibrations and noises generated when the driving gear 22 meshes with the groove 1231 can be absorbed, providing an effective noise reduction barrier for the rollable display device. Moreover, through the buffer layer 23, not only the user's auditory experience is improved, but also the wear between the driving gear 22 and the support plate 12 is reduced, thereby further enhancing the service life of the mechanical components.

[0142] Specifically, the elastic modulus of the buffer layer 23 is greater than or equal to 1 Mpa and less than or equal to 10 Mpa. For example, the elastic modulus of the buffer layer 23 can be 1.5 Mpa, 2 Mpa, 2.5 Mpa, 3 Mpa, 3.5 Mpa, 4 Mpa, 4.5 Mpa, 5 Mpa, 5.5 Mpa, 6 Mpa, 6.5 Mpa, 7 Mpa, 7.5 Mpa, 8 Mpa, 8.5 Mpa, 9 Mpa, 9.5 Mpa, and so on.

[0143] If the elastic modulus of the buffer layer 23 is too small, it is not conducive to the selection of the material of the buffer layer 23, resulting in increased costs.

[0144] If the elastic modulus of the buffer layer 23 is too large, the buffer layer 23 cannot absorb the tiny vibrations and noises generated when the driving gear 22 meshes with the groove 1231. Through the buffer layer 23, the user's auditory experience cannot be improved, nor can the service life of the mechanical components be enhanced.

[0145] The above numerical range not only makes the material of the buffer layer 23 easy to select and does not increase costs, but also the buffer layer 23 can absorb the tiny vibrations and noises generated when the driving gear 22 meshes with the groove 1231. Through the buffer layer 23, the user's auditory experience can be improved, and the service life of the mechanical components can be enhanced.

[0146] For example, the material of the buffer layer 23 can be rubber, resin, and so on.

[0147] In addition, a heat dissipation film layer can be provided on at least part of the tooth surface of the driving gear 22. Through the heat dissipation film layer, the heat generated when the driving gear 22 meshes with the groove 1231 can be dissipated, avoiding heat accumulation and preventing heat from being transferred to the flexible display panel 11, thereby preventing the adverse effects of heat accumulation and thermal stress on the display effect.

[0148] Of course, a heat dissipation film layer can also be provided on at least part of the tooth surface of the groove 1231. Similarly, through the heat dissipation film layer, the heat generated when the driving gear 22 meshes with the groove 1231 can be dissipated, avoiding heat accumulation and preventing heat from being transferred to the flexible display panel 11, thereby preventing the adverse effects of heat accumulation and thermal stress on the display effect.

[0149] The material of the heat dissipation film layer can be graphene, nanofluid, etc.

[0150] The number of the groove columns 123 can be one column, two columns, three columns, four columns or more; two groove columns 123 can be located at both ends of the support plate 12 in the third direction M; among the three groove columns 123, two of the groove columns 123 can be located at both ends of the support plate 12 in the third direction M, and the other groove column 123 is located between the above two groove columns 123, and the distances between the three groove columns 123 are the same; among the four groove columns 123, two of the groove columns 123 can be located at both ends of the support plate 12 in the third direction M, and the other two groove columns 123 are located between the above two groove columns 123, and the distance between the two groove columns 123 in the middle is greater than the distance between the two groove columns 123 on both sides.

[0151] Such a setting makes the density of the groove columns 123 arranged at both ends of the support plate 12 in the third direction M relatively larger than the density of the groove columns 123 arranged in the middle part, so as to ensure the uniformity of the force at both ends of the support plate 12 in the third direction M and avoid the flexible display module 1 from shifting during the unfolding and winding processes.

[0152] Of course, in some other exemplary embodiments of the present disclosure, two columns, three columns, four columns or more groove columns 123 can be evenly distributed.

[0153] In some exemplary embodiments of the present disclosure, when the number of the groove columns 123 is one column, one driving gear 22 and one driving assembly 21 are provided, and one driving assembly 21 drives one driving gear 22 to rotate, and the rotation of the driving gear 22 drives the flexible display module 1 to slide and wind along the second direction Y.

[0154] Refer to Figures 2 - 4 and Figures 8 - 10 As shown, in some exemplary embodiments of the present disclosure, the number of the groove columns 123 is at least two columns, and the number of the driving gears 22 is the same as the number of the groove columns 123. For example, refer to Figure 2 and Figure 8 As shown, when the number of the groove columns 123 is two columns, the number of the driving gears 22 is also two; refer to Figure 3 and Figure 9 As shown, when the number of the groove columns 123 is three columns, the number of the driving gears 22 is also three; refer to Figure 4 and Figure 10 As shown, when the number of the groove columns 123 is four columns, the number of the driving gears 22 is also four.

[0155] With such a setting, at least two groove columns 123 and the drive gear 22 can respectively bear the main driving force and the auxiliary stabilizing force during the unfolding and winding processes, so that while enhancing the driving force, the flexible display module 1 can be stably flattened in any unfolded state, reducing the risk of deformation or damage caused by excessive single-point stress.

[0156] In some exemplary embodiments of the present disclosure, the number of drive components 21 is the same as the number of groove columns 123. For example, referring to Figure 2 and Figure 8 as shown, when the number of groove columns 123 is two, the number of drive components 21 is also two; referring to Figure 3 and Figure 9 as shown, when the number of groove columns 123 is three, the number of drive components 21 is also three; referring to Figure 4 and Figure 10 as shown, when the number of groove columns 123 is four, the number of drive components 21 is also four.

[0157] With such a setting, at least two drive components 21 drive at least two drive gears 22 in a one-to-one correspondence, and at least two drive gears 22 are engaged with at least two groove columns 123 in a one-to-one correspondence, realizing the sliding winding of the flexible display module 1 along the second direction Y, so that even under high load conditions, the sliding winding action of the sliding winding display device is still coherent and powerful. For example, through a PID (Proportional-Integral-Derivative) control algorithm or other advanced control algorithms, the acceleration and deceleration processes of the drive motor 211 can be precisely controlled to ensure that the driving speeds at each stage are highly consistent, that is, the synchronous operation and precise stop of the motor are achieved, and the stable operation of the display module can be guaranteed even in complex sliding winding operations, improving the user experience.

[0158] However, the large number of drive components 21 used results in a high cost; moreover, at least two drive components 21 need to be driven and stopped synchronously, which requires a high degree of synchronism and a high precision requirement for the control system; it is also not conducive to improving space utilization.

[0159] In some exemplary embodiments of the present disclosure, the drive component 21 may include a first drive component 21a, and the first drive component 21a can drive at least two drive gears 22, thereby reducing the number of drive components 21 used, and further reducing the cost; moreover, the electrical wiring and maintenance work are simplified, the overall system integration and reliability are improved, and the energy consumption during the operation of the sliding winding display device can also be reduced, which is beneficial to extending the battery life of the sliding winding display device and conforms to the environmental protection concept of green and low-carbon.

[0160] Specifically, referring to Figure 11As shown, when the number of the groove columns 123 is an even number, the first driving assembly 21a may include a first driving motor 211a and two speed reducers 212. The first driving motor 211a has two first driving shafts 2111a arranged oppositely, that is, the first driving motor 211a may be a dual-axis driving motor 211. The two first driving shafts 2111a are respectively connected to two driving gears 22 through the two speed reducers 212. By means of one first driving assembly 21a, the two driving gears 22 can be driven to rotate simultaneously, reducing the number of driving assemblies 21 used, thereby reducing costs. Moreover, the synchronization of the two driving gears 22 is relatively high, and the accuracy requirement for the control system is relatively low. For example, when the number of the groove columns 123 is two columns, one first driving assembly 21a may be provided; when the number of the groove columns 123 is four columns, two first driving assemblies 21a may be provided; and so on. The number of the first driving assemblies 21a may also be set to three, four, etc., which will not be elaborated one by one here.

[0161] Referring to Figure 12 As shown, when the number of the groove columns 123 is an odd number greater than one, the first driving assembly 21a may include a first driving motor 211a and two speed reducers 212. The first driving motor 211a has two first driving shafts 2111a arranged oppositely, that is, the first driving motor 211a may be a dual-axis driving motor 211. The two first driving shafts 2111a are respectively connected to two driving gears 22 through the two speed reducers 212. By means of one first driving assembly 21a, the two driving gears 22 can be driven to rotate simultaneously, reducing the number of driving assemblies 21 used, thereby reducing costs. Moreover, the synchronization of the two driving gears 22 is relatively high, and the accuracy requirement for the control system is relatively low.

[0162] The number of the driving assemblies 21 is set to be two less. In addition to the first driving assembly 21a, the driving assembly 21 may further include a second driving assembly 21b. Generally, only one second driving assembly 21b is provided. The second driving assembly 21b may include a second driving motor 211b. The second driving shaft (not shown in the figure) of the second driving motor 211b is connected to a driving gear 22 through a speed reducer 212. For example, when the number of the groove columns 123 is three columns, one first driving assembly 21a and one second driving assembly 21b may be provided; when the number of the groove columns 123 is five columns, two first driving assemblies 21a and one second driving assembly 21b may be provided; and so on. It may also be that three first driving assemblies 21a and one second driving assembly 21b are provided, etc., which will not be elaborated one by one here.

[0163] In some other exemplary embodiments of the present disclosure, referring to Figure 13 and Figure 14As shown, the scroll display device may further include a connecting shaft 3. The connecting shaft 3 is connected between two adjacent driving gears 22. At least one connecting shaft 3 is provided to serially connect at least two driving gears 22 in sequence. For example, referring to Figure 13 As shown, when the number of groove columns 123 is two, there are two driving gears 22, and one connecting shaft 3 may be provided; referring to Figure 14 As shown, when the number of groove columns 123 is three, there are three driving gears 22, and two connecting shafts 3 may be provided. The two connecting shafts 3 serially connect the three driving gears 22 in sequence. When the number of groove columns 123 is four, there are four driving gears 22, and three connecting shafts 3 may be provided. The three connecting shafts 3 serially connect the four driving gears 22 in sequence.

[0164] In this case, referring to Figure 13 and Figure 14 As shown, only one first driving assembly 21a may be provided. The first driving assembly 21a may include a first driving motor 211a and a speed reducer 212. The first driving motor 211a has a first driving shaft (not shown in the figure). The first driving assembly 21a may be disposed on one side of the outermost groove column 123 away from other groove columns 123. The first driving shaft is connected to at least two serially connected driving gears 22 through the speed reducer 212 and the connecting shaft 3. For example, the first driving shaft 2111a may be connected to two serially connected driving gears 22, the first driving shaft 2111a may be connected to three serially connected driving gears 22, and the first driving shaft 2111a may be connected to four serially connected driving gears 22.

[0165] In addition, in some other exemplary embodiments of the present disclosure, referring to Figure 15 As shown, when the number of groove columns 123 is three, there are three driving gears 22, and one connecting shaft 3 may be provided. The one connecting shaft 3 serially connects two driving gears 22 in sequence. When the number of groove columns 123 is four, there are four driving gears 22, and two connecting shafts 3 may be provided. One connecting shaft 3 serially connects the first driving gear 22 and the second driving gear 22 in sequence, and the other connecting shaft 3 serially connects the third driving gear 22 and the fourth driving gear 22 in sequence.

[0166] In this case, referring to Figure 15As shown, only one first driving component 21a can also be provided. The first driving component 21a can include a first driving motor 211a. The first driving motor 211a has two relatively arranged first driving shafts 2111a, that is, the first driving motor 211a can be a dual-axis driving motor 211. At least one first driving shaft 2111a is connected to at least two driving gears 22 connected in series in sequence through a speed reducer 212 and a connecting shaft 3. For example, when there are three driving gears 22, one first driving shaft 2111a is connected to two driving gears 22 connected in series in sequence through a speed reducer 212 and a connecting shaft 3, and the other first driving shaft 2111a is connected to a single driving gear 22 through a speed reducer 212. Of course, when there are four driving gears 22, both of the two first driving shafts 2111a are connected to two driving gears 22 connected in series in sequence through a speed reducer 212 and a connecting shaft 3.

[0167] Of course, when there are five driving gears 22, one first driving shaft 2111a is connected to two driving gears 22 connected in series in sequence through a speed reducer 212 and a connecting shaft 3, and the other first driving shaft 2111a is connected to three driving gears 22 connected in series in sequence through a speed reducer 212 and a connecting shaft 3. The cases where there are more driving gears 22 will not be elaborated one by one here. Generally, when the number of driving gears 22 is even, the number of driving gears 22 connected to both sides of the first driving component 21a is the same; when the number of driving gears 22 is odd, the number of driving gears 22 connected to both sides of the first driving component 21a can differ by one.

[0168] With such a setting, the number of driving components 21 used can be reduced, thereby reducing costs; moreover, the synchronization of the two driving gears 22 is relatively high, and the precision requirement for the control system is relatively low; in addition, the space occupation is reduced, providing the possibility for the thin and light design of the device.

[0169] Referring to Figure 8 As shown, in some exemplary embodiments of the present disclosure, the included angle between the first direction X and the second direction Y can be greater than or equal to 30° and less than 90°, that is, the included angle between the extending direction of the groove 1231 and the arranging direction of the plurality of grooves 1231 can be greater than or equal to 30° and less than 90°, which can also be said that the groove 1231 is inclined; for example, the included angle between the first direction X and the second direction Y can be 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, and so on.

[0170] It should be noted that the extending directions of all the grooves 1231 in a column of groove columns 123 are the same, and the extending directions of the grooves 1231 in two columns of groove columns 123 can be different. Moreover, in a rollable display device, referring to Figure 8As shown, there may be two rows of grooves 123 with grooves 1231 extending in different directions, see Figure 9 As shown, there may be three rows of grooves 123 with grooves 1231 extending in different directions. Therefore, the angle between the first direction X and the second direction Y is relative to one row of grooves 123 .

[0171] In this case, the driving gear 22 is a helical gear, and the driving gear 22 has a helical angle, which refers to the angle between the gear teeth of the helical gear and the axis, and the helical angle is complementary to the angle between the first direction X and the second direction Y. The helical gear will generate a component force perpendicular to the contact surface during the meshing process, thereby balancing the force in the second direction Y, significantly improving the operating stability of the entire scrolling display device, and is particularly suitable for applications that require long-term stable operation. The meshing performance of the helical gear is good: the meshing process between the gear teeth of the helical cylindrical gear is a transition process, and the force on the gear teeth is gradually from small to large, and then from large to small; the helical gear is suitable for high speed and heavy load conditions. The overlap of the helical gear is large: the increase in the overlap increases the bearing capacity of the gear, thereby extending the life of the gear; the overlap mainly depends on the meshing time, and the helical gear has a long meshing time and a large contact area, which reduces stress; and makes the transmission smooth and increases its economy. In addition, the minimum number of teeth of the helical gear is small, making the structure more compact.

[0172] In addition, in some other exemplary embodiments of the present disclosure, referring to Figures 2 - 4 As shown, the first direction X is perpendicular to the second direction Y, that is, the extension direction of the groove 1231 is perpendicular to the arrangement direction of the plurality of grooves 1231; in this case, the driving gear 22 is a spur gear, and during the sliding and rolling process of the flexible display module 1, the spur gear can quickly respond to the driving command, thereby accelerating the unfolding and rolling process of the flexible display module 1, and is particularly suitable for scenarios that require high-speed dynamic response.

[0173] In some example embodiments of the present disclosure, reference is made to Figures 2 - 4 As shown, no matter how many groove rows 123 there are, for example, the number of groove rows 123 is one row, two rows, three rows or more rows, the extension direction of all grooves 1231 is perpendicular to the second direction Y, that is, the first direction X is perpendicular to the second direction Y.

[0174] In some other example embodiments of the present disclosure, when the number of groove columns 123 is an even number, for example, the number of groove columns 123 is two columns, four columns, six columns, etc.; the extension directions of the grooves 1231 of different groove columns 123 are symmetrically arranged, and the axis of symmetry is the central axis L of the support plate 12 extending along the second direction Y.

[0175] For example, refer to Figure 8As shown, when the number of groove columns 123 is two columns, the extending direction of the grooves 1231 in the first groove column 123 is symmetrically arranged with the extending direction of the grooves 1231 in the second groove column 123; refer to Figure 10 As shown, when the number of groove columns 123 is four columns, the extending direction of the grooves 1231 in the first groove column 123 is symmetrically arranged with the extending direction of the grooves 1231 in the fourth groove column 123. They can both be perpendicular to the second direction Y, or both have the above-mentioned included angle with the second direction Y. It's just that the extending direction of the grooves 1231 in the first groove column 123 can be deflected counterclockwise, and the extending direction of the grooves 1231 in the fourth groove column 123 can be deflected clockwise. The extending direction of the grooves 1231 in the second groove column 123 is symmetrically arranged with the extending direction of the grooves 1231 in the third groove column 123. They can both be perpendicular to the second direction Y, or both have the above-mentioned included angle with the second direction Y. It's just that the extending direction of the grooves 1231 in the second groove column 123 can be deflected counterclockwise, and the extending direction of the grooves 1231 in the third groove column 123 can be deflected clockwise.

[0176] In some other exemplary embodiments of the present disclosure, when the number of groove columns 123 is an odd number greater than one, for example, the number of groove columns 123 is three columns, five columns, seven columns, etc. The extending direction of the grooves 1231 in the middle column, three columns or five columns of groove columns 123 is perpendicular to the second direction Y. The extending directions of the grooves 1231 in the different groove columns 123 on both sides are symmetrically arranged, and the axis of symmetry is the central axis L along which the support plate 12 extends in the second direction Y.

[0177] For example, refer to Figure 9 As shown, when the number of groove columns 123 is three columns, the extending direction of the grooves 1231 in the middle second groove column 123 is perpendicular to the second direction Y. The extending directions of the grooves 1231 in the first groove column 123 on both sides are symmetrically arranged with the extending directions of the grooves 1231 in the third groove column 123, or they can both have the above-mentioned included angle with the second direction Y. It's just that the extending direction of the grooves 1231 in the first groove column 123 can be deflected counterclockwise, and the extending direction of the grooves 1231 in the second groove column 123 can be deflected clockwise.

[0178] Optionally, the groove column 123 may include a flattened groove column 123P, and the flattened groove column 123P is set as an even number of columns. For example, the flattened groove column 123P can be set as two columns, four columns, six columns, etc.; moreover, the extending direction of the grooves 1231 in the flattened groove column 123P has an included angle with the second direction Y that is greater than or equal to 30° and less than 90°. The specific included angle has been described in detail above and will not be elaborated here. The extending directions of the grooves 1231 in different flattened groove columns 123P are symmetrically arranged, and the axis of symmetry is the central axis L along which the support plate 12 extends in the second direction Y.

[0179] Such a setting is such that when the driving gear 22 meshes with the groove 1231 to realize the unfolding and winding of the flexible display module 1, the component forces generated by the two rows of flattened groove rows 123P (for example, Figure 9 the first groove row 123 and the third groove row 123 in ) in the third direction M perpendicular to the second direction Y are opposite in direction and basically the same in value, so that the flexible display module 1 can be flattened in the third direction M and the component forces generated in the third direction M can be balanced, avoiding the drawbacks of wrinkles and deformations of the flexible display module 1, thereby improving the flatness and mechanical stability when the flexible display module 1 is unfolded and curled; moreover, the extending direction of the groove 1231 of the groove row 123 in the middle is perpendicular to the second direction Y, and the driving gear 22 cooperating with it is a spur gear, which has the advantage of efficient torque transmission and improves the overall operating efficiency.

[0180] In some exemplary embodiments of the present disclosure, referring to Figures 16 - 18 as shown, the sliding and winding display device may further include a heat insulation layer 4, and the heat insulation layer 4 is provided on the side of the support plate 12 facing away from the flexible display panel 11, and the heat insulation layer 4 is located between the driving assembly 21 and the support plate 12. Through the heat insulation layer 4, the driving assembly 21 and the support plate 12 can be thermally isolated, and further the driving assembly 21 and the flexible display panel 11 can be thermally isolated, avoiding the heat generated during the operation of the driving assembly 21 from being transferred to the flexible display panel 11, thereby preventing the adverse effects of heat accumulation and thermal stress on the display effect.

[0181] Since the support plate 12 moves along the second direction Y relative to the driving assembly 21, therefore, the heat insulation layer 4 is provided as a strip extending along the second direction Y. For example, in the second direction Y, the length of the heat insulation layer 4 may be equal to the length of the support plate 12, so that no matter what state the sliding and winding display device is in, the heat insulation layer 4 is located between the driving assembly 21 and the support plate 12.

[0182] In addition, since the driving assembly 21 and the groove row 123 are adjacent to each other, the heat insulation layer 4 and the groove row 123 are also adjacent to each other, so that the groove row 123 forms a ventilation or heat dissipation channel, and the heat generated by the driving assembly 21 can be discharged through the groove 1231, ensuring the directional discharge of heat and maintaining the thermal balance of the entire system.

[0183] The material of the heat insulation layer 4 may be heat insulation glue, for example, it may be polyurethane foam glue (PU FOAM), silicone-based heat insulation glue, aerogel, etc.

[0184] Optionally, a heat dissipation through hole is provided on the outer shell, and the heat dissipation through hole can be arranged opposite to the heat insulation layer 4, so that the heat of the heat insulation layer 4 can be discharged through the heat dissipation through hole, further avoiding the heat generated during the operation of the driving component 21 from being transferred to the flexible display panel 11, further preventing the adverse effects of heat accumulation and thermal stress on the display effect, thereby improving the service life of the entire sliding display device, and providing users with a more stable and reliable visual experience platform.

[0185] In some exemplary embodiments of the present disclosure, the support plate 12 may include a body portion 121 and a plurality of convex strips 122, the plurality of convex strips 122 being fixed to a side of the body portion 121 away from the flexible display module 1, the plurality of convex strips 122 extending along the first direction X, and a groove 1231 being provided between two adjacent convex strips 122. In this way, the thickness of the body portion 121 can be reduced, the stress generated by the support plate 12 when being bent can be reduced, and the wrinkles and deformation of the flexible display module 1 can be reduced or even avoided, thereby improving the flatness of the flexible display module 1 when it is unfolded and rolled. The plurality of convex strips 122 can support the flexible display module 1, and in the case where a plurality of groove columns 123 are provided, a plurality of convex strip columns are provided, further realizing the support of the flexible display module 1, and in the sliding and rolling process, especially when the flexible display module 1 is unfolded to the maximum size, the mechanical stress faced is significantly increased. By increasing the number of groove columns 123, these stresses can be more evenly dispersed, the burden on a single structural point can be reduced, and the overall mechanical durability and impact resistance can be further improved.

[0186] Of course, in some other exemplary embodiments of the present disclosure, the groove 1231 may also be a blind groove provided on the support plate 12, that is, a bottom wall is provided at the bottom of the groove 1231, so that the depth of the groove 1231 is less than the thickness of the support plate 12; such a setting prevents the driving gear 22 from abutting against the flexible display panel 11, and avoids imprinting on the flexible display panel 11, thereby affecting the display effect. The groove 1231 may also be a through groove provided on the support plate 12, that is, there is no bottom wall at the bottom of the groove 1231, so that the depth of the groove 1231 is equal to the thickness of the support plate 12; in this case, the tooth height of the driving gear 22 may be less than the depth of the groove 1231, which can also prevent the driving gear 22 from abutting against the flexible display panel 11, and avoid imprinting on the flexible display panel 11, thereby affecting the display effect.

[0187] In some example embodiments of the present disclosure, reference is made to Figures 19 - 22 As shown, the flexible display module 1 may include a bent portion 1W and two flat portions 1P, and the two flat portions 1P are connected to opposite sides of the bent portion 1W. The lengths of the two flat portions 1P vary with different states of the flexible display module 1.

[0188] The driving gear 22 is at least fitted to the bending portion 1W of the flexible display module 1. For example, the driving gear 22 is fitted to the bending portion 1W of the flexible display module 1 and also to a part of two flat portions 1P connected to the bending portion 1W, so that the driving gear 22 can not only mesh with the groove 1231 to drive the movement of the flexible display module 1, but also act as a rotating shaft to support the bending portion 1W of the flexible display module 1.

[0189] Of course, in some other exemplary embodiments of the present disclosure, the driving gear 22 can be fitted to the flat portion 1P of the flexible display module 1.

[0190] Referring to Figures 19 - 21 As shown, one end of the flexible display module 1 without the circuit board 15 provided thereon can be used as the pulling-out end of the flexible display module 1. Referring to Figure 22 As shown, one end of the flexible display module 1 with the circuit board 15 provided thereon can be used as the pulling-out end of the flexible display module 1. With such a setting, one end with the circuit board 15 provided thereon can always remain in a flat state, avoiding bending of the circuit board 15, thereby increasing the length of the flexible display panel 11 when unfolded.

[0191] In some exemplary embodiments of the present disclosure, referring to Figures 23 - 31 As shown, the orthographic projection of the circuit board 15 on the support plate 12 does not overlap with the groove 1231. Specifically, the orthographic projection of the printed circuit board 15a on the support plate 12 and the orthographic projection of the flip chip film 13 on the support plate 12 do not overlap with the groove 1231. Since the printed circuit board 15a and the flip chip film 13 are bonded to the support plate 12, even if the groove 1231 is provided on the support plate 12 under the printed circuit board 15a and the flip chip film 13, it will be blocked by the printed circuit board 15a and the flip chip film 13 and cannot function to mesh with the driving gear 22. Moreover, it can avoid the heat generated during the operation of the driving assembly 21 from being directly transferred to the surrounding circuit board 15, reducing the influence of thermal stress on the performance of the components, and effectively preventing the physical collision and extrusion risks of the driving assembly 21 to the circuit board 15, improving the long-term service life of the components.

[0192] For example, referring to Figure 23 – Figure 25 As shown, two columns, three columns, four columns or more columns of groove columns 123 can be provided on the side of the printed circuit board 15a away from the flip chip film 13. Referring to Figure 26 – Figure 27 As shown, two columns of groove columns 123 at the outermost edge in the third direction M can be provided on both sides of the printed circuit board 15a in the third direction M, and one column, two columns or more columns of groove columns 123 in the middle can be provided on the side of the printed circuit board 15a away from the flip chip film 13; moreover, the lengths of one column or two columns of groove columns 123 in the middle can be the same or different. Referring toFigure 28 – Figure 30 As shown, two printed circuit boards 15a can be provided. The two printed circuit boards 15a can be sequentially connected along the second direction Y. The two outermost columns of groove columns 123 in the third direction M can be provided on both sides of the printed circuit board 15a in the third direction M. One column, two columns or more columns of groove columns 123 in the middle can be provided on the side of the printed circuit board 15a farthest from the flip chip film 13 and away from the flip chip film 13; Refer to Figure 31 As shown, one column, two columns or more columns of groove columns 123 in the middle can be provided on the side of the printed circuit board 15a farthest from the flip chip film 13 and away from the flip chip film 13. One column, two columns or more columns of groove columns 123 in the middle can be provided on the side of the printed circuit board 15a connected to the flip chip film 13 and away from the flip chip film 13; Moreover, the lengths of one column or two columns of groove columns 123 in the middle can be the same or different.

[0193] In addition, a position sensor can be provided. Through the position sensor, the unfolding state of the flexible display module 1 can be monitored in real time. The position sensor can be electrically connected to the controller that controls the driving motor 211. The controller can receive the position information transmitted by the position sensor to precisely control the unfolding and winding speeds, ensuring the smoothness and responsiveness of the user operation.

[0194] It should be noted that the circuit board 15 can include the printed circuit board 15a, the flip chip film 13, and can also include a flexible circuit board and other devices for setting components and routing.

[0195] After considering the specification and practicing the disclosed utility model herein, those skilled in the art will readily conceive of other embodiments of the present disclosure. This application is intended to cover any variations, uses, or adaptations of the present disclosure, which follow the general principles of the present disclosure and include known common knowledge or conventional technical means in the technical field not disclosed by the present disclosure. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the appended claims.

Claims

1. A sliding and rolling display device, characterized in that, Comprising: A flexible display module, including a flexible display panel and a support plate; the flexible display panel has a display side and a non-display side arranged oppositely; The support plate is arranged on the non-display side of the flexible display panel, and a plurality of grooves extending in a first direction are arranged on a surface of the support plate facing away from the flexible display panel, and the plurality of grooves are arranged in at least one row of groove rows in a second direction. The first direction is parallel to the support plate, the second direction is parallel to the sliding and winding direction of the flexible display module, and intersects with the first direction; A driving mechanism, including a driving gear and a driving component, the driving gear meshes with the row of grooves, the driving component is connected to the driving gear, and the driving component is used to drive the driving gear to rotate, so as to drive the flexible display module to perform sliding and winding.

2. The scroll display device according to claim 1, characterized in that, The driving mechanism further includes: A buffer layer, arranged on at least part of the tooth surface of the driving gear, and the modulus of the buffer layer is less than the modulus of the driving gear.

3. The scroll display device according to claim 1, wherein The driving component includes: A driving motor, having a driving shaft; A speed reducer, connected between the driving shaft and the driving gear.

4. The scroll display device according to claim 3, wherein, The speed reducer includes: A first gear, connected to the driving shaft; At least two second gears, meshing with the outer circumference of the first gear, the diameter of the second gear is larger than the diameter of the first gear, the driving gear is a toothed ring, an internal tooth is arranged on the inner side of the driving gear, and an external tooth is arranged on the outer side of the toothed ring, and at least two of the second gears mesh with the internal tooth; A cage, and at least two of the second gears are rotatably connected to the cage.

5. The scroll display device according to claim 1, wherein The number of the rows of grooves is at least two, the number of the driving gears is the same as the number of the rows of grooves, the driving component includes a first driving component, and one first driving component drives at least two of the driving gears.

6. The scroll display device according to claim 5, wherein, The number of the rows of grooves is an even number, the first driving component includes a first driving motor, the first driving motor has two relatively arranged first driving shafts, and the two first driving shafts are respectively connected to the two driving gears in a one-to-one correspondence; Alternatively, the number of the rows of grooves is an odd number greater than one, the first driving component includes a first driving motor, the first driving motor has two relatively arranged first driving shafts, and the two first driving shafts are respectively connected to the two driving gears in a one-to-one correspondence; the number of the driving components is at least two, the driving component further includes a second driving component, the second driving component includes a second driving motor, and a second driving shaft of the second driving motor is connected to one of the driving gears.

7. The scroll display device according to claim 5, wherein The sliding and winding display device further includes: A connecting shaft, connected between two adjacent driving gears, and the connecting shaft is arranged as at least one to connect at least two driving gears in series in sequence.

8. The scroll display device according to claim 7, wherein, The first driving component is provided as one; the first driving component includes a first driving motor, the first driving motor has a first driving shaft, and the first driving shaft is connected to at least two of the driving gears connected in series in sequence; alternatively, the first driving component includes a first driving motor, the first driving motor has two first driving shafts arranged oppositely, and at least one of the first driving shafts is connected to at least two of the driving gears connected in series in sequence.

9. The scroll display device according to claim 1, characterized in that, The included angle between the first direction and the second direction is greater than or equal to 30° and less than 90°, and the driving gear is a helical gear; alternatively, the first direction is perpendicular to the second direction, and the driving gear is a spur gear.

10. The scroll display device according to claim 9, wherein When the number of the groove columns is an even number, the extending directions of the grooves in different groove columns are symmetrically arranged, and the symmetry axis is the central axis of the support plate extending in the second direction; alternatively, when the number of the groove columns is an odd number greater than one, the extending direction of the grooves in the middlemost groove column is perpendicular to the second direction, and the extending directions of the grooves in different groove columns on both sides are symmetrically arranged, and the symmetry axis is the central axis of the support plate extending in the second direction.

11. The scroll display device according to claim 9, wherein The groove column includes a flattening groove column, the flattening groove column is provided as an even number of columns, and the extending direction of the grooves in the flattening groove column has an included angle greater than or equal to 30° and less than 90° with the second direction, and the extending directions of the grooves in different flattening groove columns are symmetrically arranged, and the symmetry axis is the central axis of the support plate extending in the second direction.

12. The rollable display device according to claim 1, wherein, The scroll display device further includes: A heat insulation layer, provided on the side of the support plate facing away from the flexible display panel and located between the driving component and the flexible display module.

13. The scroll display device according to claim 1, wherein The scroll display device further includes: A housing, in which two guide grooves are provided, and the two guide grooves are oppositely arranged in the third direction; Two sliding parts, which are slidably engaged with the two guide grooves in a one-to-one correspondence, and the two sliding parts are fixedly arranged on the opposite sides of the flexible display module in the third direction, the third direction is parallel to the support plate, and the third direction is perpendicular to the second direction.

14. The scroll display device according to claim 13, wherein The surface roughness of the sliding part is greater than or equal to 0.1 μm and less than or equal to 0.3 μm, and the surface roughness of the guide groove is greater than or equal to 0.1 μm and less than or equal to 0.3 μm.

15. The scroll display device according to claim 13, wherein, The guide groove includes: A first part, extending along the second direction; A second part, smoothly connected to the first part, and the second part is provided as an arc; A third part, smoothly connected to the second part, the third part extends along the second direction, and the first part and the third part are located on the same side of the second part.

16. The scroll display device according to claim 13, characterized in that, The width of the notch part of the guide groove is smaller than the width of the bottom part of the guide groove, and the sliding part is provided with a structure adapted to the guide groove.

17. The scroll display device according to claim 1, wherein The support plate includes: A body part; A plurality of convex strips, fixed on the surface of the body part facing away from the flexible display panel, and the grooves are formed between adjacent two convex strips.

18. The scroll display device according to claim 1, wherein The flexible display module further includes: A circuit board is connected to the flexible display panel and is bent at a side of the support plate away from the flexible display panel, wherein the orthographic projection of the circuit board on the support plate does not overlap with the groove.

19. The scroll display device according to claim 1, characterized in that, The edges of the groove are provided with chamfers.

20. The scroll display device according to claim 1, characterized in that, The flexible display module comprises a curved portion and two flat portions, the two flat portions are connected to opposite sides of the curved portion, and the driving gear is at least matched with the curved portion of the flexible display module.

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