Rollable display device

Abstract

A rollable display device, relating to the technical field of displays. The rollable display device comprises a flexible display module (1) and a driving mechanism (2), wherein the flexible display module (1) comprises a flexible display panel (11) and a support plate (12); the flexible display panel (11) has a display side and a non-display side which are provided opposite to each other; the support plate (12) is provided on the non-display side of the flexible display panel (11), a plurality of grooves (1231) extending along a first direction (X) are provided on the surface of the support plate (12) facing away from the flexible display panel (11), the plurality of grooves (1231) are arranged along a second direction (Y) to form at least one groove column, the first direction (X) is parallel to the support plate (12), and the second direction (Y) is parallel to the rolling direction of the flexible display module (1) and intersects the first direction (X); and the driving mechanism (2) comprises a driving gear (22) and a driving assembly, the driving gear (22) meshes with the groove column, the driving assembly is connected to the driving gear (22), and the driving assembly is configured to drive the driving gear (22) to rotate, so as to drive the flexible display module to roll. The rollable display device has high flatness when unrolled and rolled, and has a long service life and stable operation.

Description

Sliding roll display device

[0001] Cross-reference to related applications

[0002] The present disclosure claims priority to Chinese Patent Application No. 202411288072.0, filed on September 13, 2024, entitled “Sliding roll display device”, the entire contents of which are incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present disclosure relates to the field of display technology, and in particular, to a sliding roll display device. BACKGROUND

[0004] In today's era of rapid technological progress, display devices, as the window of information presentation, directly affect the functionality and user experience of electronic devices. Especially with the rise of the Internet of Things, smart home, wearable devices, and autonomous driving technology, higher requirements are placed on the form, flexibility, and intelligence of display devices.

[0005] Organic Light-Emitting Display (OLED) display panels have become the mainstream development direction in the field of display technology due to their self-emitting, high brightness, good picture quality, low energy consumption, wide viewing angle, and bendability, and are widely used in consumer electronic products such as mobile phones, wearables, and vehicles.

[0006] However, the current sliding roll display device cannot meet the higher performance requirements of users.

[0007] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present disclosure, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0008] The purpose of the present disclosure is to overcome the deficiencies of the prior art described above, and to provide a sliding roll display device.

[0009] According to one aspect of the present disclosure, a sliding roll display device is provided, comprising:

[0010] A flexible display module includes a flexible display panel and a support plate; the flexible display panel has a display side and a non-display side arranged opposite to each other; the support plate is arranged on the non-display side of the flexible display panel, and one side of the support plate away from the flexible display panel is provided with a plurality of grooves extending along a first direction, and a plurality of the grooves are arranged as at least one groove column along a second direction, the first direction is parallel to the support plate, the second direction is parallel to the sliding direction of the flexible display module, and intersects with the first direction.

[0011] a driving mechanism, comprising driving gears engaged with the groove columns, and a driving assembly connected to the driving gears, the driving assembly being configured to drive the driving gears to rotate, thereby driving the flexible display module to roll.

[0012] In an exemplary embodiment of the present disclosure, the driving mechanism further comprises:

[0013] a buffer layer provided on at least part of the tooth surface of the driving gears, the buffer layer having a modulus smaller than that of the driving gears.

[0014] In an exemplary embodiment of the present disclosure, the driving assembly comprises:

[0015] a driving motor having a driving shaft;

[0016] a speed reducer connected between the driving shaft and the driving gears.

[0017] In an exemplary embodiment of the present disclosure, the speed reducer comprises:

[0018] a first gear connected to the driving shaft;

[0019] at least two second gears engaged with the outer periphery of the first gear, the second gears having a diameter larger than that of the first gear, the driving gears being gear rings, the inner side of the gear rings being provided with internal teeth, the outer side of the gear rings being provided with external teeth, the at least two second gears being engaged with the internal teeth;

[0020] a retainer, the at least two second gears being rotatably connected to the retainer.

[0021] In an exemplary embodiment of the present disclosure, the number of groove columns is at least two, the number of driving gears is the same as that of the groove columns, and the driving assembly comprises first driving assemblies, one first driving assembly driving at least two driving gears.

[0022] In an exemplary embodiment of the present disclosure, the number of groove columns is even, the first driving assembly comprises a first driving motor, the first driving motor having two first driving shafts arranged oppositely, and the two first driving shafts being connected to two driving gears one by one.

[0023] Alternatively, the number of groove columns is an odd number greater than one, the first driving assembly includes a first driving motor, the first driving motor has two first driving shafts arranged oppositely, and the two first driving shafts are connected to the two driving gears one by one; the driving assemblies are arranged as two less, and the driving assemblies further include a second driving assembly, 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.

[0024] In an example embodiment of the present disclosure, the sliding roll display device further includes:

[0025] A connecting shaft is connected between adjacent two driving gears, and the connecting shaft is arranged as at least one to connect at least two driving gears in series.

[0026] In an example embodiment of the present disclosure, the first driving assembly is arranged as one; the first driving assembly includes a first driving motor, the first driving motor has one first driving shaft, and the first driving shaft is connected to at least two driving gears in series; 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 first driving shaft is connected to at least two driving gears in series.

[0027] In an example embodiment of the present disclosure, an 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.

[0028] In an example embodiment of the present disclosure, when the number of groove columns is an even number, the extension directions of the grooves of different groove columns are symmetrically arranged, and a symmetric axis is a central axis of the support plate extending in the second direction; alternatively, when the number of groove columns is an odd number greater than one, the extension direction of the grooves of the groove column located in the middle is perpendicular to the second direction, the extension directions of the grooves of different groove columns located on both sides are symmetrically arranged, and a symmetric axis is a central axis of the support plate extending in the second direction.

[0029] In an example embodiment of the present disclosure, the groove columns include flattened groove columns, the flattened groove columns are arranged as an even number of columns, the extension directions of the grooves of the flattened groove columns have an angle greater than or equal to 30° and less than 90° with the second direction, and the extension directions of the grooves of different flattened groove columns are symmetrically arranged, and a symmetric axis is a central axis of the support plate extending in the second direction.

[0030] In an example embodiment of the present disclosure, the sliding roll display device further includes:

[0031] A thermal insulation layer is arranged on a side of the support plate away from the flexible display panel and between the driving assembly and the flexible display module.

[0032] In an example embodiment of the present disclosure, the sliding roll display device further comprises:

[0033] A housing is provided with two guide grooves arranged opposite to each other in a third direction;

[0034] Two sliding parts are slidably fitted in the two guide grooves, respectively, and are fixed to opposite sides of the flexible display module in the third direction, which is parallel to the support plate and perpendicular to the second direction.

[0035] In an example 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.

[0036] In an example embodiment of the present disclosure, the guide groove comprises:

[0037] A first part extending in the second direction;

[0038] A second part smoothly connected to the first part, the second part being arranged in an arc shape;

[0039] A third part smoothly connected to the second part, the third part extending in the second direction, and the first part and the third part being located on the same side of the second part.

[0040] In an example embodiment of the present disclosure, the width of the slot part of the guide groove is less than the width of the groove bottom part, and the sliding part is arranged to be adapted to the structure of the guide groove.

[0041] In an example embodiment of the present disclosure, the support plate comprises:

[0042] A body part;

[0043] A plurality of convex strips fixed to a side of the body part away from the flexible display panel, and the grooves are arranged between adjacent two convex strips.

[0044] In an example embodiment of the present disclosure, the flexible display module further comprises:

[0045] A circuit board connected to the flexible display panel and bent on a side of the support plate away from the flexible display panel, and the orthographic projection of the circuit board on the support plate does not overlap with the groove.

[0046] In an exemplary embodiment of the present disclosure, the edges of the groove are provided with chamfers.

[0047] In an exemplary embodiment of the present disclosure, the flexible display module comprises a bending portion and two flat portions, the two flat portions being connected to opposite sides of the bending portion, and the drive gear is engaged with at least the bending portion of the flexible display module.

[0048] It should be understood that the general description above and the detailed description below are only exemplary and explanatory and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0049] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and serve to explain the principles of the present disclosure. It is readily apparent to one skilled in the art that the following description is merely exemplary and explanatory in nature and is not restrictive of the present disclosure as described below in the accompanying drawings, from which further embodiments will be apparent to those skilled in the art without departing from the scope and spirit of the present disclosure.

[0050] FIG. 1 is a structural schematic diagram of an exemplary embodiment of a flexible display module in a sliding roll display device according to the present disclosure.

[0051] FIG. 2 is a partial structural schematic diagram of a first exemplary embodiment of a sliding roll display device according to the present disclosure.

[0052] FIG. 3 is a partial structural schematic diagram of a second exemplary embodiment of a sliding roll display device according to the present disclosure.

[0053] FIG. 4 is a partial structural schematic diagram of a third exemplary embodiment of a sliding roll display device according to the present disclosure.

[0054] FIG. 5 is a structural schematic diagram of a housing of a sliding roll display device according to the present disclosure.

[0055] FIG. 6 is a structural schematic diagram of a guide groove 52 and a sliding portion 6 of FIG. 5.

[0056] FIG. 7 is a partial structural schematic diagram of a drive assembly of FIGS. 2-3.

[0057] FIG. 8 is a partial structural schematic diagram of a fourth exemplary embodiment of a sliding roll display device according to the present disclosure.

[0058] FIG. 9 is a partial structural schematic diagram of a fifth exemplary embodiment of a sliding roll display device according to the present disclosure.

[0059] FIG. 10 is a partial structural schematic diagram of a sixth exemplary embodiment of a sliding roll display device according to the present disclosure.

[0060] FIG. 11 is a partial structural schematic diagram of a seventh exemplary embodiment of a sliding roll display device according to the present disclosure.

[0061] FIG. 12 is a schematic view of a partial structure of a sliding roll display device according to an eighth exemplary embodiment of the present disclosure.

[0062] FIG. 13 is a schematic view of a partial structure of a sliding roll display device according to a ninth exemplary embodiment of the present disclosure.

[0063] FIG. 14 is a schematic view of a partial structure of a sliding roll display device according to a tenth exemplary embodiment of the present disclosure.

[0064] FIG. 15 is a schematic view of a partial structure of a sliding roll display device according to an eleventh exemplary embodiment of the present disclosure.

[0065] FIG. 16 is a schematic view of a partial structure of a sliding roll display device according to a twelfth exemplary embodiment of the present disclosure.

[0066] FIG. 17 is a schematic view of a partial structure of a sliding roll display device according to a thirteenth exemplary embodiment of the present disclosure.

[0067] FIG. 18 is a schematic view of a partial structure of a sliding roll display device according to a fourteenth exemplary embodiment of the present disclosure.

[0068] FIG. 19 is a schematic view of a structure of a flexible display module in an initial state (not unfolded) in a sliding roll display device according to the present disclosure.

[0069] FIG. 20 is a schematic view of a structure of a flexible display module in an operating state (unfolding process) in a sliding roll display device according to the present disclosure.

[0070] FIG. 21 is a schematic view of a structure of a flexible display module in an unfolded state in a sliding roll display device according to the present disclosure.

[0071] FIG. 22 is a schematic view of a structure of a flexible display module in an unfolded state according to another exemplary embodiment of a sliding roll display device according to the present disclosure.

[0072] FIG. 23 is a schematic view of a partial structure of a sliding roll display device according to a fifteenth exemplary embodiment of the present disclosure.

[0073] FIG. 24 is a schematic view of a partial structure of a sliding roll display device according to a sixteenth exemplary embodiment of the present disclosure.

[0074] FIG. 25 is a schematic view of a partial structure of a sliding roll display device according to a seventeenth exemplary embodiment of the present disclosure.

[0075] FIG. 26 is a schematic view of a partial structure of a sliding roll display device according to an eighteenth exemplary embodiment of the present disclosure.

[0076] FIG. 27 is a schematic view of a partial structure of a sliding roll display device according to a nineteenth exemplary embodiment of the present disclosure.

[0077] FIG. 28 is a schematic view of a partial structure of a sliding roll display device according to a twentieth exemplary embodiment of the present disclosure.

[0078] FIG. 29 is a schematic view of a partial structure of a twenty-first exemplary embodiment of the sliding roll display device of the present disclosure.

[0079] FIG. 30 is a schematic view of a partial structure of a twenty-second exemplary embodiment of the sliding roll display device of the present disclosure.

[0080] FIG. 31 is a schematic view of a partial structure of a twenty-third exemplary embodiment of the sliding roll display device of the present disclosure.

[0081] BRIEF DESCRIPTION OF DRAWINGS 1, flexible display module; 1W, bending portion; 1P, flat portion; 11, flexible display panel; 12, support plate; 121, body portion; 122, protrusion; 123, groove column; 123P, flattened groove column; 1231, groove; 13, thin film of die; 14, display driving chip; 15, circuit board; 15a, printed circuit board; 16, adhesive; 171, first foam double-sided tape; 172, second foam double-sided tape; 18, polarizer; 19, cover plate; 110, adhesive layer; 2, driving mechanism; 21, driving assembly; 21a, first driving assembly; 21b, second driving assembly; 211, driving motor; 211a, first driving motor; 211b, second driving motor; 2111, driving shaft; 2111a, first driving shaft; 212, speed reducer; 2121, first gear; 2122, second gear; 2123, retainer; 22, driving gear; 23, buffer layer; 3, connecting shaft; 4, heat insulation layer; 5, housing; 51, window; 52, guide groove; 521, first portion; 522, second portion; 523, third portion; 53, opening portion; 54, first sleeve; 55, second sleeve; 6, sliding portion; AA, display area; NAA, non-display area; BOD, binding area; X, first direction; Y, second direction; M, third direction. DETAILED DESCRIPTION

[0082] Example embodiments now will be described more fully hereinafter with reference to the accompanying drawings; however, these embodiments should not be construed as limiting the example embodiments, but merely as illustrating possible embodiments. Indeed, the example embodiments can be embodied in many different 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 refer to like elements throughout the specification. Moreover, the figures can not be to scale and some features can be exaggerated to show details of particular embodiments. The specific structural and functional details disclosed herein are not intended to be exhaustive but rather are for illustration purposes.

[0083] Although relative terms are used in this description, such as "upper," "lower," to describe one component's relationship to another component of the icon, these terms are used herein solely for convenience and are not intended to limit the scope of the disclosure, for example, according to the example orientation shown in the figures. It is to be understood that if the icon's device were turned over, such that the upper component would become the lower component, the described orientation would be reversed. When a structure is "on" another structure, it can mean that the structure is formed integrally with the other structure, or that the structure is "directly" on the other structure, or that the structure is "indirectly" on the other structure by way of another structure.

[0084] The terms "one," "a," "an," "the," and "said" are used to indicate that there is one or more of something / element / component / etc.; the terms "comprising" and "having" are used to indicate an open-ended inclusion of the elements / components / etc. listed after the term; the terms "first," "second," and "third," etc. are used only as labels, and do not imply any order, quantity, or importance of the elements being described.

[0085] In this application, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly, for example, "connection" can be fixed connection, or detachable connection, or integral; can be directly connected, or indirectly connected through an intermediate medium. "And / or", is only a description of the relationship between the associated objects, which means that there can be three kinds of relationships, for example, A and / or B, which can represent the existence of A alone, the existence of A and B together, and the existence of B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are in an "or" relationship.

[0086] The example embodiments of the present disclosure provide a sliding roll display device, which can include a flexible display module 1 and a driving mechanism 2, as shown in FIGS. 1-31. The flexible display module 1 can 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 oppositely. The support plate 12 is arranged on the non-display side of the flexible display panel 11. One side of the support plate 12, which is away from the flexible display panel 11, is provided with a plurality of grooves 1231 extending along a first direction X. The plurality of grooves 1231 are arranged as at least one groove column 123 along a second direction Y. The first direction X is parallel to the support plate 12, and the second direction Y is parallel to the sliding direction of the flexible display module 1 and intersects the first direction X. The driving mechanism 2 can include a driving gear 22 and a driving assembly 21. The driving gear 22 is engaged with the groove column 123, and the driving assembly 21 is connected to the driving gear 22. The driving assembly 21 is used to drive the driving gear 22 to rotate, thereby driving the flexible display module 1 to slide and roll.

[0087] The sliding and rolling display device of the present disclosure, on the one hand, by setting the groove 1231 on the support plate 12, the stress generated when the support plate 12 is bent can be reduced, and the adverse effects 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 is unfolded and rolled; on the other hand, the drive gear 22 and the groove 1231 form a gear and rack transmission structure, which has large transmission power and high reliability, so that the sliding and rolling display device can be applied to various scenes, and the drive gear 22 and the groove 1231 transmission structure has long service life and stable work, thereby improving the service life and work stability of the sliding and rolling display device.

[0088] In the present example embodiment, the flexible display panel 11 can be an OLED (Organic Electroluminescence Display) display panel, a QLED (Quantum Dot Light Emitting Diodes) display panel, or the like; 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 the display side can display a picture, one side of the display picture is a display surface, and the other side opposite to the display surface is a non-display surface.

[0089] The flexible display panel 11 can include a substrate substrate, a driving substrate, a light-emitting substrate, an encapsulation layer group, and a touch layer group. The driving substrate can drive the light-emitting substrate to emit light. The driving substrate is arranged on one side of the substrate substrate, and the light-emitting substrate is arranged on the side of the driving substrate away from the substrate substrate; the driving substrate can include a plurality of driving circuits arranged in an array, and the light-emitting substrate can include a plurality of light-emitting devices arranged in an array, and the driving circuit can drive the light-emitting device to emit light. The encapsulation layer group is arranged on the side of the light-emitting substrate away from the substrate substrate, and the encapsulation layer group can block water and oxygen to prevent the driving substrate and the light-emitting substrate from being corroded by water and oxygen; the touch layer group is arranged on the side of the encapsulation layer group away from the substrate substrate, and the touch layer group enables the flexible display panel 11 to realize touch function.

[0090] Of course, in some other example embodiments of the present disclosure, the touch layer group can not be provided; in the case where the touch layer group is not provided, an externally mounted touch module can also be provided.

[0091] Referring to FIG. 1, the flexible display panel 11 has a display area AA and a non-display area NAA, the non-display area NAA can include a binding area BOD, a chip on film 13 can be bound to the binding area BOD by anisotropic conductive adhesive, a display driving chip 14 can be disposed on the chip on film 13, and a circuit board 15 can be connected to an end of the chip on film 13 away from the flexible display panel 11, the circuit board 15 can be a printed circuit board 15a, and various components and connecting wires can be disposed on the printed circuit board 15a. The chip on film 13 can be bent, so that the end of the chip on 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.

[0092] In addition, in some other example embodiments of the present disclosure, a flexible circuit board can be used instead of the chip on film 13, and the flexible circuit board is included in the circuit board 15; or the chip on film 13 and the flexible circuit board can not be provided, because the flexible display panel 11 itself can be bent, i.e., the non-display area NAA can include a bending area and the binding area BOD, the bending area can be connected between the display area AA and the binding area BOD, and the circuit board 15 can be bound to the binding area BOD by anisotropic conductive adhesive, the circuit board 15 can be a printed circuit board 15a, and the bending area can be bent, so that the printed circuit board 15a is located on the non-display side of the flexible display panel 11.

[0093] Referring to FIG. 1, the support plate 12 is adhered to the non-display side of the flexible display panel 11 by an adhesive 16, and the material of the adhesive 16 can be pressure sensitive adhesive (PSA). The flexible display panel 11 can be supported by the support plate 12.

[0094] Referring to FIG. 1, the first foam double-sided tape 171 is disposed on the side of the support plate 12 away from the flexible display panel 11, one adhesive surface of the first foam double-sided tape 171 is adhered to the support plate 12, and the opposite adhesive surface of the first foam double-sided tape 171 is adhered to the printed circuit board 15a. The printed circuit board 15a can be fixed by the first foam double-sided tape 171, and the first foam double-sided 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, reduce or even avoid the generation of an impression on the flexible display panel 11, and ensure the display effect.

[0095] The second foam double-sided tape 172 is arranged on the side of the support plate 12 away from the flexible display panel 11, one adhesive surface of the second foam double-sided tape 172 is adhered to the support plate 12, and the opposite adhesive surface of the second foam double-sided tape 172 is adhered to the COF 13. The COF 13 can be fixed by the second foam double-sided tape 172, and the second foam double-sided tape 172 has elasticity, which can reduce or even avoid the pressure of the display driving chip 14 on the flexible display panel 11, reduce or even avoid the generation of an imprint on the flexible display panel 11, and ensure the display effect. In addition, recesses can be arranged on the second foam double-sided tape 172, and the recesses can accommodate the display driving chip 14, further reducing or even avoiding the generation of an imprint on the flexible display panel 11, and ensuring the display effect.

[0096] A polarizer 18 can be arranged on the display side of the flexible display panel 11, that is, the display side of the flexible display panel 11 can be provided with a polarizer 18. A cover plate 19 can be arranged on the side of the polarizer 18 away from the flexible display panel 11, and the cover plate 19 can be adhered to the polarizer 18 by an adhesive layer 110. The material of the adhesive layer 110 can be OCA (Optically Clear Adhesive).

[0097] Referring to FIGS. 2-4, in the present example embodiment, a plurality of grooves 1231 extending along a first direction X are arranged on the side of the support plate 12 away from the flexible display panel 11, and the plurality of grooves 1231 are arranged into at least one groove column 123 along a second direction Y. For example, the plurality of grooves 1231 can be arranged into one groove column 123 along the second direction Y, as shown in FIG. 2, the plurality of grooves 1231 can be arranged into two groove columns 123 along the second direction Y, as shown in FIG. 3, the plurality of grooves 1231 can be arranged into three groove columns 123 along the second direction Y, as shown in FIG. 4, and the plurality of grooves 1231 can be arranged into four groove columns 123 along the second direction Y. Of course, the plurality of grooves 1231 can be arranged into more groove columns 123 along the second direction Y, which will not be described here.

[0098] 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 rolling direction of the flexible display module 1. The first direction X intersects the second direction Y, for example, the first direction X is perpendicular to the second direction Y in FIGS. 2-4, and the included angle between the first direction X and the second direction Y is an acute angle in FIGS. 8-10.

[0099] It should be noted that the rolling direction of the flexible display module 1 is the direction in which the flexible display module 1 is unfolded and rolled up.

[0100] By arranging the grooves 1231 on the support plate 12, the stress generated when the support plate 12 is bent can be reduced, and the undesirable wrinkling 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 is unfolded and rolled up.

[0101] The edges of the grooves 1231 are chamfered to avoid interference between the edges of the grooves 1231 and the teeth of the drive gear 22, which would cause the teeth of the drive gear 22 to be scratched and affect the service life of the drive gear 22. Specifically, the support plate 12 between two adjacent grooves 1231 corresponds to a tooth of a rack, and the support plate 12 between two adjacent grooves 1231 can be arranged in a toothed structure that matches the teeth of the drive gear 22.

[0102] In the example embodiment, referring to FIGS. 2-4, the drive mechanism 2 can include a drive gear 22 engaged in the grooves 1231, and a drive assembly 21, such that the support plate 12 corresponds to a rack engaged with the drive gear 22, and the grooves 1231 correspond to tooth grooves of the rack.

[0103] The drive assembly 21 is connected to the drive gear 22, and the drive assembly 21 is used to drive the drive gear 22 to rotate, which drives the support plate 12 and the flexible display panel 11 fixed to the support plate 12 to slide in the second direction Y, thereby achieving the unfolding and rolling up of the flexible display panel 11.

[0104] The gear and rack transmission structure formed by the cooperation of the drive gear 22 and the grooves 1231 has high reliability and large transmission power, so that the slide and roll display device can be applied to various scenarios, for example, it can be used in smart car interiors: in the car instrument panel, center console, door or rear seat entertainment system, the slide and roll display device can be expanded or rolled up as needed, providing customized information display and entertainment experience, while optimizing the use of car space; it can be used in mobile devices: smart phones, tablets and foldable laptops, etc. mobile devices, realizing flexible change of screen size, convenient to carry and meeting the demand of large screen watching and operation; it can be used in smart home: smart speakers, home security monitoring or smart home appliances embedded with slide and roll screens, which can be unfolded or hidden intelligently according to the situation, improving the convenience and technology of home life; it can be used in wearable devices: watches, bracelets, etc. wearable products, through the slide and roll technology, a larger display area can be provided without increasing the wearing volume, enriching the information display and interaction mode; and the gear and rack transmission structure of the drive gear 22 and the grooves 1231 has long service life and stable work, thereby improving the service life and stability of the slide and roll display device.

[0105] In the example embodiment, referring to FIG. 5, the slide-roll display device can further include a housing 5, a window 51 is formed on the housing 5, the flexible display panel 11 is opposite to the window 51, a user can watch the display screen of the flexible display panel 11 through the window 51, and the flexible display panel 11 can be stretched out from one side of the window 51 to increase the display area. Specifically, an opening part 53 is also formed on the housing 5, the opening part 53 is connected with the window 51 integrally and perpendicular to each other, a first sleeve 54 and a second sleeve 55 are also arranged in the housing 5, the first sleeve 54 and the second sleeve 55 are both arranged as rectangular sleeves, the first sleeve 54 is sleeved outside the second sleeve 55, the flexible display module 1 is fixed on the first sleeve 54, and the first sleeve 54 can be pulled out from the opening part 53 along the second direction Y, so that the flexible display module 1 can be stretched out from the opening part 53 along the second direction Y, thereby driving the flexible display module 1 to be unfolded; of course, the first sleeve 54 can be retracted into the housing 5 from the opening part 53 along the second direction Y, thereby driving the flexible display module 1 to be rolled up.

[0106] In some example embodiments of the present disclosure, a linear motor can be arranged to drive the first sleeve 54 to move along the second direction Y, thereby achieving 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 part 53 along the second direction Y.

[0107] Alternatively, referring to FIG. 5, two guide grooves 52 can be arranged in the housing 5, the two guide grooves 52 are arranged opposite to each other in the third direction, specifically, the two guide grooves 52 are arranged one by one on the two inner side walls of the housing 5 arranged opposite to each other in the third direction; the guide groove 52 extends along the second direction Y, that is, the guide groove 52 extends along the slide-roll direction of the flexible display module 1.

[0108] Referring to FIGS. 2-4, two sliding parts 6 are fixed one by one on the opposite sides of the flexible display module 1 in the third direction M, that is, one 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 two opposite sides in the third direction M, two sliding parts 6 are needed to be fixed.

[0109] The two sliding parts 6 are slidably fitted 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 guide groove 52 and the sliding part 6 cooperate to provide a guiding action for the unfolding or rolling up of the flexible display module 1, avoiding the flexible display module 1 from being deviated during the unfolding or rolling up, and ensuring the stability of the unfolding or rolling up of the flexible display module 1.

[0110] 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 on which the flexible display panel 11 is arranged, and the third direction M is arranged perpendicularly to the second direction Y, and in FIGS. 2-4, the third direction M is the same as the first direction X.

[0111] Specifically, please continue to refer to FIG. 5, the guide groove 52 can include a first portion 521, a second portion 522 and a third portion 523 which are sequentially and smoothly connected, the first portion 521 extends along the second direction Y, that is, the first portion 521 extends along the rolling direction of the flexible display module 1, and the first portion 521 is arranged in a straight line shape; the second portion 522 is smoothly connected to the first portion 521, and the second portion 522 is arranged in an arc shape, for example, the second portion 522 is arranged in a semicircular arc shape, and the second portion 522 and the first portion 521 can be externally tangent to each other;

[0112] The third portion 523 is smoothly connected to the second portion 522, for example, the third portion 523 and the second portion 522 can be externally tangent to each other; the third portion 523 extends along the second direction Y, that is, the third portion 523 extends along the rolling direction of the flexible display module 1. Moreover, the first portion 521 and the third portion 523 are located on the same side of the second portion 522, so that the guide groove 52 can be arranged in a lying "U" shape, so that when the flexible display module 1 is in a rolled state and also forms a lying "U" shape, the two sliding portions 6 on both sides of the flexible display module 1 are located in the two guide grooves 52, and the guide grooves 52 can play a supporting role for the flexible display module 1; Moreover, in the process of rolling and unfolding the flexible display module 1, the guide groove 52 can also play a supporting role for the flexible display module 1 as much as possible.

[0113] Referring to FIGS. 2-4, the sliding portion 6 can be arranged in a whole structure along the edge of the flexible display module 1. Of course, in some other example embodiments of the present disclosure, the sliding portion 6 can also be arranged in a plurality of disconnected strip structures, and thus arranged, the contact area between the sliding portion 6 and the guide groove 52 can be reduced, thereby reducing the frictional resistance between the sliding portion 6 and the guide groove 52, so that the movement of the flexible display module 1 when being unfolded and rolled is more smooth, and at the same time, the operation noise is further inhibited, and the overall operation quietness is improved.

[0114] In some example embodiments of the present disclosure, referring to FIG. 6, the guide groove 52 is configured as a structure in which the width of the groove mouth portion is less than the width of the groove bottom portion, for example, the guide groove 52 can be configured as a dovetail groove; correspondingly, the sliding portion 6 can be configured as a structure matched with the guide groove 52, for example, the sliding portion 6 can be configured as a trapezoidal sliding portion 6. In this way, the sliding portion 6 cannot be pulled out of the guide groove 52, ensuring the guiding effect of the guide groove 52 and the sliding portion 6 on the flexible display module 1; moreover, the guide groove 52 and the sliding portion 6 have a flattening effect on the flexible display module 1, avoiding the generation of wrinkles and deformation of the flexible display module 1, thereby improving the flatness of the flexible display module 1 during unrolling and rolling. Of course, the guide groove 52 can also be configured as a rectangular groove, and the width of the groove mouth portion of the rectangular groove is less than the width of the groove bottom portion, and 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 less than the width of the rectangular guide rail, and the connecting portion is matched with the groove mouth portion.

[0115] In some example 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.

[0116] If the surface roughness of the sliding portion 6 is too small, the process is difficult to achieve, thereby increasing the preparation cost.

[0117] If the surface roughness of the sliding portion 6 is too large, the frictional resistance between the sliding portion 6 and the guide groove 52 is too large, making the movement of the flexible display module 1 during unrolling and rolling not smooth, and also increasing the running noise, reducing the overall operation quietness.

[0118] The above numerical range is not only easy to achieve in process and has lower preparation cost, but also has smaller frictional resistance between the sliding portion 6 and the guide groove 52, making the movement of the flexible display module 1 during unrolling and rolling more smooth, and further suppressing the running noise, improving the overall operation quietness.

[0119] The surface roughness of the guide 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 guide groove 52 can be 0.12, 0.15, 0.17, 0.2, 0.23, 0.25, 0.28, etc.

[0120] Similarly, if the surface roughness of the guide groove 52 is too small, the process is difficult to achieve, thereby increasing the preparation cost.

[0121] If the surface roughness of the guide groove 52 is too large, the frictional resistance between the sliding portion 6 and the guide groove 52 is too large, making the movement of the flexible display module 1 during unrolling and rolling not smooth, and also increasing the running noise, reducing the overall operation quietness.

[0122] The above numerical range is not only easy to achieve in the process and has a lower manufacturing cost, but also has a smaller frictional resistance between the sliding part 6 and the guide groove 52, so that the flexible display module 1 moves more smoothly when it is unfolded and rolled up, and the running noise is further inhibited, and the overall operation is more quiet.

[0123] It should be noted that the unit of the above surface roughness is microns (μm), and the above surface roughness can be the profile arithmetic mean deviation Ra.

[0124] In some example embodiments of the present disclosure, referring to FIGS. 2-4 and 7, the driving assembly 21 can 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 by a support 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 rolling rate of the flexible display module 1 does not need to be too large, the speed reducer 212 can reduce the rotation speed output by the driving motor 211, which is conducive to the selection of the driving motor 211, thereby reducing the cost.

[0125] For example, the speed reducer 212 can include a first gear 2121, a second gear 2122, and a retainer 2123 (the first gear 2121 and the second gear 2122 are simplified and no teeth are drawn). The first gear 2121 is an external gear, and the first gear 2121 is fixedly connected to the driving shaft 2111 of the driving motor 211. The second gear 2122 is provided in at least two, for example, three second gears 2122 can be provided, the second gear 2122 is an external gear, and the three second gears 2122 are engaged with the outer periphery of the first gear 2121, and the three second gears 2122 are uniformly distributed, and the three second gears 2122 are rotatably connected to the retainer 2123. For example, the retainer 2123 can be provided in the form of a triangular frame, and three fixed shafts are provided at the three top corners of the retainer 2123, and bearings are provided on the fixed shafts, and the bearings are provided with the second gears 2122, so that the second gears 2122 are rotatably connected to the retainer 2123.

[0126] In this case, the driving gear 22 is provided in the form of a gear ring, the inner side of the gear ring is provided with internal teeth (not shown in the figure), and the outer side of the gear ring is provided with external teeth, the three second gears 2122 are engaged with the internal teeth, and the external teeth of the gear ring are engaged with the grooves 1231.

[0127] 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 retainer 2123, the diameter of the second gear 2122 is greater than that of the first gear 2121, and the first speed reduction is realized; meanwhile, the second gear 2122 is engaged with the inner teeth of the driving gear 22 to transmit power to the driving gear 22, thereby realizing power transmission and the second speed reduction. The force moment is transmitted through at least two second gears 2122, and the transmission efficiency is high, the noise is low, the stability and reliability are good, the high torque output can be realized in a limited space, and the device is suitable for various harsh working environments. Thus, the sliding roll display device can still be coherent and powerful in sliding roll action even under high load, and has better quietness and can adapt to various harsh working environments.

[0128] Of course, in some other example embodiments of the present disclosure, the second gear 2122 can be provided as two or more, and correspondingly, the retainer 2123 can be provided as a strip or various multi-shaped frames. The speed reducer 212 can also adopt other gear reducers 212, worm reducers 212, etc., which will not be described one by one here.

[0129] In some example embodiments of the present disclosure, referring to FIG. 7, the driving mechanism 2 can further include a buffer layer 23 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, i.e., the buffer layer 23 can be provided on the tooth surface (the side surface between the addendum cylinder surface and the dedendum cylinder surface), the addendum cylinder surface and the dedendum cylinder 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, i.e., the buffer layer 23 can be provided on the tooth surface and the addendum cylinder surface of the driving gear 22.

[0130] The modulus of the buffer layer 23 is less than that of the driving gear 22, and specifically, the elastic modulus of the buffer layer 23 is less than that of the driving gear 22.

[0131] The elastic modulus can be regarded as an index for measuring the difficulty of elastic deformation of a material, and the greater the value, the greater the stress required to cause a certain elastic deformation of the material, i.e., the greater the stiffness of the material, i.e., the smaller the elastic deformation under a certain stress. The elastic modulus refers to the stress required to produce unit elastic deformation under external force. It is an index reflecting the ability of a material to resist elastic deformation, which is equivalent to the stiffness in ordinary springs.

[0132] The elastic modulus of the buffer layer 23 is less than that of the drive gear 22, so that the buffer layer 23 is more likely to be deformed, and the slight vibration and noise generated when the drive gear 22 engages with the groove 1231 can be absorbed by the buffer layer 23, thereby providing an effective noise reduction barrier for the slide-roll display device; and moreover, the buffer layer 23 not only improves the auditory experience of the user, but also reduces the wear of the drive gear 22 and the support plate 12, thereby further improving the service life of the mechanical assembly.

[0133] 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, etc.

[0134] 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 cost.

[0135] If the elastic modulus of the buffer layer 23 is too large, the buffer layer 23 cannot absorb the slight vibration and noise generated when the drive gear 22 engages with the groove 1231, and the buffer layer 23 cannot improve the auditory experience of the user and cannot improve the service life of the mechanical assembly.

[0136] The above numerical range not only makes the material of the buffer layer 23 easy to select and does not increase the cost, but also enables the buffer layer 23 to absorb the slight vibration and noise generated when the drive gear 22 engages with the groove 1231, and the buffer layer 23 can improve the auditory experience of the user and can improve the service life of the mechanical assembly.

[0137] For example, the material of the buffer layer 23 can be rubber, resin, etc.

[0138] In addition, a heat dissipation film layer can also be provided on at least part of the tooth surface of the drive gear 22, and the heat generated when the drive gear 22 engages with the groove 1231 can be dissipated through the heat dissipation film layer, avoiding heat accumulation and heat transfer to the flexible display panel 11, thereby preventing the adverse effects of heat accumulation and thermal stress on the display effect.

[0139] Of course, a heat dissipation film layer can also be provided on at least part of the tooth surface of the groove 1231, and the heat generated when the drive gear 22 engages with the groove 1231 can also be dissipated through the heat dissipation film layer, avoiding heat accumulation and heat transfer to the flexible display panel 11, thereby preventing the adverse effects of heat accumulation and thermal stress on the display effect.

[0140] The material of the heat dissipation film layer can be graphene, nanofluid, etc.

[0141] The number of groove columns 123 can be one, two, three, four or more; two groove columns 123 can be located at both ends of the third direction M of the support plate 12; two of the three groove columns 123 can be located at both ends of the third direction M of the support plate 12, and the other groove column 123 is located between the two groove columns 123; in the four groove columns 123, two of the four groove columns 123 can be located at both ends of the third direction M of the support plate 12, and the other two groove columns 123 are located between the two groove columns 123, and the spacing between the two groove columns 123 in the middle is greater than the spacing between the two groove columns 123 on the two sides.

[0142] In this way, the density of the groove columns 123 arranged at both ends of the third direction M of the support plate 12 is greater than the density of the groove columns 123 arranged at the middle part, so as to ensure the uniformity of the force at both ends of the third direction M of the support plate 12, and avoid the flexible display module 1 from being offset during the unwinding and winding processes.

[0143] Of course, in some other example embodiments of the present disclosure, the two, three, four or more groove columns 123 can be uniformly distributed.

[0144] In some example embodiments of the present disclosure, when the number of groove columns 123 is one, one driving gear 22 and one driving assembly 21 are arranged, the driving assembly 21 drives the driving gear 22 to rotate, and the rotation of the driving gear 22 drives the flexible display module 1 to wind and unwind along the second direction Y.

[0145] Referring to FIGS. 2-4 and 8-10, in some example embodiments of the present disclosure, the number of groove columns 123 is at least two, and the number of driving gears 22 is the same as the number of groove columns 123, for example, referring to FIGS. 2 and 8, when the number of groove columns 123 is two, the number of driving gears 22 is also two; referring to FIGS. 3 and 9, when the number of groove columns 123 is three, the number of driving gears 22 is also three; referring to FIGS. 4 and 10, when the number of groove columns 123 is four, the number of driving gears 22 is also four.

[0146] In this way, at least two groove columns 123 and driving gears 22 can respectively bear the main driving force and auxiliary stabilizing force during the unwinding and winding processes, so as to improve the driving force while ensuring the stable unwinding of the flexible display module 1 in any unwinding state, and reducing the risk of deformation or damage caused by excessive force on a single point.

[0147] In some example embodiments of the present disclosure, the number of driving assemblies 21 is the same as the number of groove columns 123, for example, referring to FIGS. 2 and 8, when the number of groove columns 123 is two, the number of driving assemblies 21 is also two; referring to FIGS. 3 and 9, when the number of groove columns 123 is three, the number of driving assemblies 21 is also three; referring to FIGS. 4 and 10, when the number of groove columns 123 is four, the number of driving assemblies 21 is also four.

[0148] In this way, by driving the at least two driving gears 22 one by one through the at least two driving assemblies 21, the at least two driving gears 22 are engaged with the at least two groove columns 123 one by one, so as to realize the scrolling of the flexible display module 1 along the second direction Y. Even in the case of high load, the scrolling action is still consistent and powerful. For example, the acceleration and deceleration process of the driving motor 211 can be accurately controlled through a PID (Proportion-Integral-Derivative) control algorithm or other advanced control algorithm, so as to ensure that the driving speed of each stage remains highly consistent, that is, the synchronous operation and accurate stop of the motor are realized, and the stable operation of the display module can be ensured even in complex scrolling operations, thereby improving the user experience.

[0149] However, the use of a large number of driving assemblies 21 leads to high cost, and the at least two driving assemblies 21 need to be driven and stopped synchronously, which requires high synchronization and high precision of the control system, and is not conducive to improving the space utilization.

[0150] In some example embodiments of the present disclosure, the driving assembly 21 can include a first driving assembly 21a, which can drive the at least two driving gears 22, thereby reducing the number of driving assemblies 21 used, and thus reducing the cost. Moreover, the electrical wiring and maintenance work are simplified, the integration and reliability of the overall system are improved, the energy consumption during the operation of the scrolling display device is reduced, the battery endurance of the scrolling display device is prolonged, and the green and low-carbon environmental protection concept is met.

[0151] Specifically, referring to FIG. 11, in the case that the number of groove rows 123 is even, the first driving assembly 21a can include one first driving motor 211a and two reducers 212, the first driving motor 211a has two first driving shafts 2111a arranged oppositely, i.e., the first driving motor 211a can be a double-shaft driving motor 211, the two first driving shafts 2111a are connected to two driving gears 22 one by one through the two reducers 212, two driving gears 22 can be simultaneously driven to rotate by one first driving assembly 21a, the number of driving assemblies 21 is reduced, and the cost is reduced, and the synchronism of the two driving gears 22 is higher, and the precision requirement of the control system is lower; for example, when the number of groove rows 123 is two, one first driving assembly 21a can be arranged; when the number of groove rows 123 is four, two first driving assemblies 21a can be arranged; and so on, the number of first driving assemblies 21a can also be three, four, etc., which will not be described one by one here.

[0152] Referring to FIG. 12, in the case that the number of groove rows 123 is an odd number greater than one, the first driving assembly 21a can include one first driving motor 211a and two reducers 212, the first driving motor 211a has two first driving shafts 2111a arranged oppositely, i.e., the first driving motor 211a can be a double-shaft driving motor 211, the two first driving shafts 2111a are connected to two driving gears 22 one by one through the two reducers 212; two driving gears 22 can be simultaneously driven to rotate by one first driving assembly 21a, the number of driving assemblies 21 is reduced, and the cost is reduced, and the synchronism of the two driving gears 22 is higher, and the precision requirement of the control system is lower.

[0153] The number of driving assemblies 21 is reduced by two, and the driving assembly 21 can further include a second driving assembly 21b in addition to the first driving assembly 21a, the second driving assembly 21b is generally arranged as one, the second driving assembly 21b can include a second driving motor 211b, a second driving shaft (not shown in the figure) of the second driving motor 211b is connected to one driving gear 22 through a reducer 212. For example, when the number of groove rows 123 is three, one first driving assembly 21a and one second driving assembly 21b can be arranged; when the number of groove rows 123 is five, two first driving assemblies 21a and one second driving assembly 21b can be arranged; and so on, three first driving assemblies 21a and one second driving assembly 21b can also be arranged, etc., which will not be described one by one here.

[0154] In some example embodiments of the present disclosure, referring to FIGS. 13 and 14, the slide-roll display device can further include a connecting shaft 3 connected between two adjacent drive gears 22, and the connecting shaft 3 is provided as at least one to connect the at least two drive gears 22 in series. For example, referring to FIG. 13, when the number of groove rows 123 is two and the number of drive gears 22 is two, one connecting shaft 3 can be provided. Referring to FIG. 14, when the number of groove rows 123 is three and the number of drive gears 22 is three, two connecting shafts 3 can be provided to connect the three drive gears 22 in series. When the number of groove rows 123 is four and the number of drive gears 22 is four, three connecting shafts 3 can be provided to connect the four drive gears 22 in series.

[0155] In this case, referring to FIGS. 13 and 14, only one first driving assembly 21a can be provided, and the first driving assembly 21a can include one first driving motor 211a having a first driving shaft (not shown) and one speed reducer 212. The first driving assembly 21a can be disposed on the side of the groove row 123 farthest from the other groove rows 123 at the edge, and the first driving shaft can be connected to the at least two drive gears 22 connected in series through the speed reducer 212 and the connecting shaft 3. For example, the first driving shaft 2111a can be connected to two drive gears 22 connected in series, the first driving shaft 2111a can be connected to three drive gears 22 connected in series, and the first driving shaft 2111a can be connected to four drive gears 22 connected in series.

[0156] In addition, in some example embodiments of the present disclosure, referring to FIG. 15, when the number of groove rows 123 is three and the number of drive gears 22 is three, one connecting shaft 3 can be provided to connect two drive gears 22 in series. When the number of groove rows 123 is four and the number of drive gears 22 is four, two connecting shafts 3 can be provided, one connecting shaft 3 to connect the first drive gear 22 and the second drive gear 22 in series, and the other connecting shaft 3 to connect the third drive gear 22 and the fourth drive gear 22 in series.

[0157] In this case, referring to FIG. 15, only one first driving assembly 21a can be provided, and the first driving assembly 21a can include a first driving motor 211a having two first driving shafts 2111a arranged oppositely, i.e., the first driving motor 211a can be a double-shaft driving motor 211, and at least one first driving shaft 2111a is connected to at least two driving gears 22 connected in series 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 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 first driving shafts 2111a are connected to two driving gears 22 connected in series through a speed reducer 212 and a connecting shaft 3.

[0158] Of course, when there are five driving gears 22, one first driving shaft 2111a is connected to two driving gears 22 connected in series 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 through a speed reducer 212 and a connecting shaft 3. The case where there are more driving gears 22 will not be described here. Generally, when the number of driving gears 22 is even, the number of driving gears 22 connected to the first driving assembly 21a on both sides is the same; when the number of driving gears 22 is odd, the number of driving gears 22 connected to the first driving assembly 21a on both sides can differ by one.

[0159] In this way, the number of driving assemblies 21 used can be reduced, thereby reducing costs; moreover, the synchronization of two driving gears 22 is higher, and the precision requirement of the control system is lower; in addition, the space occupation is reduced, which provides the possibility for the light and thin design of the equipment.

[0160] Referring to FIG. 8, in some example embodiments of the present disclosure, the angle between the first direction X and the second direction Y can be greater than or equal to 30° and less than 90°, i.e., the angle between the extension direction of the groove 1231 and the arrangement 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 grooves 1231 are arranged obliquely; for example, the angle between the first direction X and the second direction Y can be 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, etc.

[0161] It should be noted that the extension directions of all the grooves 1231 in one groove column 123 are the same, the extension directions of the grooves 1231 in two groove columns 123 can be different, and in one scroll display device, the extension directions of the grooves 1231 in two groove columns 123 can be different as shown in FIG. 8, and the extension directions of the grooves 1231 in three groove columns 123 can be different as shown in FIG. 9. Therefore, the angle between the first direction X and the second direction Y is relative to one groove column 123.

[0162] In this case, the drive gear 22 is a helical gear, the drive gear 22 has a helix angle, the helix angle refers to the angle between the tooth of the helical gear and the axis, and the helix angle is complementary to the angle between the first direction X and the second direction Y. The helical gear generates a force perpendicular to the contact surface during meshing, thereby balancing the force in the second direction Y, significantly improving the running stability of the entire scroll display device, and being particularly suitable for application scenarios that require long-term stable operation. The helical gear has good meshing performance: the meshing process between the teeth of the helical cylindrical gear is an overrunning process, and the force on the tooth gradually increases from small to large and then decreases from large to small; the helical gear is suitable for high speed and heavy load conditions. The coincidence degree of the helical gear is large: the increase of the coincidence degree improves the carrying capacity of the gear, thereby prolonging the service life of the gear; the coincidence degree mainly depends on the meshing time, and the helical gear has a long meshing time and a large contact area, thereby reducing the stress; and the transmission is stable, and the economy is increased. Moreover, the helical gear has a smaller minimum number of teeth, so that the structure is more compact.

[0163] In addition, in some other example embodiments of the present disclosure, as shown in FIGS. 2-4, 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 drive gear 22 is a spur gear, and during the scrolling of the flexible display module 1, the spur gear can quickly respond to the driving instruction to accelerate the unfolding and rolling process of the flexible display module 1, and is particularly suitable for scenarios that pursue high-speed dynamic response.

[0164] In some example embodiments of the present disclosure, as shown in FIGS. 2-4, no matter how many groove columns 123 there are, for example, the number of groove columns 123 is one, two, three or more, the extension directions of all the grooves 1231 are perpendicular to the second direction Y, that is, the first direction X is perpendicular to the second direction Y.

[0165] In some other example embodiments of the present disclosure, the number of groove columns 123 is even, for example, the number of groove columns 123 is two, four, six, etc.; the extension directions of the grooves 1231 in different groove columns 123 are symmetrically arranged, and the symmetry axis is the central axis L of the support plate 12 extending in the second direction Y.

[0166] For example, referring to FIG. 8, when the number of groove rows 123 is two, the extending direction of the grooves 1231 of the first groove row 123 is symmetrically arranged with the extending direction of the grooves 1231 of the second groove row 123; referring to FIG. 10, when the number of groove rows 123 is four, the extending direction of the grooves 1231 of the first groove row 123 is symmetrically arranged with the extending direction of the grooves 1231 of the fourth groove row 123, which can be perpendicular to the second direction Y or have the above-mentioned angle with the second direction Y, but the extending direction of the grooves 1231 of the first groove row 123 can be counterclockwise deflection, and the extending direction of the grooves 1231 of the fourth groove row 123 can be clockwise deflection; the extending direction of the grooves 1231 of the second groove row 123 is symmetrically arranged with the extending direction of the grooves 1231 of the third groove row 123, which can be perpendicular to the second direction Y or have the above-mentioned angle with the second direction Y, but the extending direction of the grooves 1231 of the second groove row 123 can be counterclockwise deflection, and the extending direction of the grooves 1231 of the third groove row 123 can be clockwise deflection.

[0167] In some example embodiments of the present disclosure, when the number of groove rows 123 is an odd number greater than one, for example, the number of groove rows 123 is three, five, seven, etc. The extending direction of the grooves 1231 of the middle one, three or five groove rows 123 is perpendicular to the second direction Y, and the extending direction of the grooves 1231 of the different groove rows 123 on both sides is symmetrically arranged, with the symmetry axis being the center axis L of the support plate 12 extending along the second direction Y.

[0168] For example, referring to FIG. 9, when the number of groove rows 123 is three, the extending direction of the grooves 1231 of the middle second groove row 123 is perpendicular to the second direction Y; the extending direction of the grooves 1231 of the first groove row 123 on both sides is symmetrically arranged with the extending direction of the grooves 1231 of the third groove row 123, which can be perpendicular to the second direction Y or have the above-mentioned angle with the second direction Y, but the extending direction of the grooves 1231 of the first groove row 123 can be counterclockwise deflection, and the extending direction of the grooves 1231 of the second groove row 123 can be clockwise deflection.

[0169] Alternatively, the groove rows 123 can include flattened groove rows 123P, which are arranged as an even number of rows, for example, two, four, six, etc. The extending direction of the grooves 1231 of the flattened groove rows 123P has an angle greater than or equal to 30° and less than 90° with the second direction Y, and the specific angle has been described in detail above, which will not be repeated here. The extending direction of the grooves 1231 of different flattened groove rows 123P is symmetrically arranged, with the symmetry axis being the center axis L of the support plate 12 extending along the second direction Y.

[0170] In this way, when the driving gear 22 engages with the grooves 1231 to achieve the unwinding and winding of the flexible display module 1, the two rows of pull flattening groove columns 123P (for example, the first groove column 123 and the third groove column 123 in FIG. 9) are opposite in direction and have substantially the same value in the third direction M perpendicular to the second direction Y, so that the flexible display module 1 can be pulled flat in the third direction M and the generated component force in the third direction M is balanced, avoiding the adverse effects of wrinkles and deformation of the flexible display module 1, thereby improving the flatness and mechanical stability of the flexible display module 1 during unwinding and winding. Moreover, the extension direction of the grooves 1231 of the groove column 123 in the middle is perpendicular to the second direction Y, and the driving gear 22 matched therewith is a spur gear, which has the advantage of high efficiency in transmitting torque, thereby improving the overall operation efficiency.

[0171] In some example embodiments of the present disclosure, referring to FIGS. 16-18, the slide-roll display device can further include a heat insulation layer 4 disposed on the side of the support plate 12 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. The driving assembly 21 and the support plate 12 can be thermally isolated by the heat insulation layer 4, and the driving assembly 21 and the flexible display panel 11 are further thermally isolated, thereby preventing the heat generated by the driving assembly 21 from being transmitted to the flexible display panel 11, and preventing the adverse effects of heat accumulation and thermal stress on the display effect.

[0172] Since the support plate 12 moves relative to the driving assembly 21 in the second direction Y, the heat insulation layer 4 is arranged in a strip shape extending in the second direction Y. For example, in the second direction Y, the length of the heat insulation layer 4 can be equal to the length of the support plate 12, so that the heat insulation layer 4 is located between the driving assembly 21 and the support plate 12 regardless of the state of the slide-roll display device.

[0173] In addition, since the driving assembly 21 is arranged adjacent to the groove column 123, the heat insulation layer 4 is also arranged adjacent to the groove column 123, so that the groove column 123 forms a ventilation or heat dissipation channel, and the heat generated by the driving assembly 21 can be discharged through the grooves 1231, thereby ensuring the directional discharge of heat and maintaining the thermal balance of the entire system.

[0174] The material of the heat insulation layer 4 can be heat insulation glue, such as polyurethane foam glue (PU FOAM), silicone-based heat insulation glue, aerogel, and the like.

[0175] Optionally, a heat dissipation through hole is arranged on the 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 by the driving assembly 21 from being transmitted to the flexible display panel 11, further preventing the adverse effects of heat accumulation and thermal stress on the display effect, and improving the service life of the entire slide-roll display device, thereby providing a more stable and reliable visual experience platform for the user.

[0176] In some example embodiments of the present disclosure, the support plate 12 can include a body portion 121 and a plurality of protrusions 122 fixed to a side of the body portion 121 away from the flexible display module 1, the plurality of protrusions 122 extending along the first direction X, and a groove 1231 between any two adjacent protrusions 122. In this way, the thickness of the body portion 121 can be reduced, the stress generated when the support plate 12 is bent can be reduced, and the adverse effects of 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 up. The plurality of protrusions 122 can support the flexible display module 1. In the case where a plurality of groove columns 123 are provided, a plurality of protrusion columns are also provided, thereby further supporting the flexible display module 1. During the sliding and rolling process, especially when the flexible display module 1 is unfolded to the maximum size, the mechanical stress faced by the flexible display module 1 significantly increases. By increasing the number of groove columns 123, the stress can be more evenly distributed, the burden on a single structure point can be reduced, and the overall mechanical durability and impact resistance can be further improved.

[0177] Of course, in some other example embodiments of the present disclosure, the groove 1231 can also be a blind groove provided on the support plate 12, i.e., the groove 1231 has a bottom wall at the bottom, so that the depth of the groove 1231 is less than the thickness of the support plate 12. In this way, the driving gear 22 can avoid abutting against the flexible display panel 11, and the impression on the flexible display panel 11 can be avoided, thereby affecting the display effect. The groove 1231 can also be a through groove provided on the support plate 12, i.e., the groove 1231 has no bottom wall at the bottom, 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 can be less than the depth of the groove 1231, and the driving gear 22 can also avoid abutting against the flexible display panel 11, and the impression on the flexible display panel 11 can be avoided, thereby affecting the display effect.

[0178] In some example embodiments of the present disclosure, referring to FIGS. 19-22, the flexible display module 1 can include a curved portion 1W and two flat plate portions 1P connected to opposite sides of the curved portion 1W. The lengths of the two flat plate portions 1P change with different states of the flexible display module 1.

[0179] The driving gear 22 is fitted to at least 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 fitted to a part of the two flat plate portions 1P connected to the bending portion 1W, so that the driving gear 22 can not only engage with the groove 1231 to drive the flexible display module 1 to move, but also can replace the rotating shaft to support the bending portion 1W of the flexible display module 1.

[0180] Of course, in some other example embodiments of the present disclosure, the driving gear 22 can be fitted to the flat plate portion 1P of the flexible display module 1.

[0181] Referring to FIGS. 19-21, one end of the flexible display module 1 without the circuit board 15 can be used as the pull-out end of the flexible display module 1. Referring to FIG. 22, one end of the flexible display module 1 with the circuit board 15 can be used as the pull-out end of the flexible display module 1, so that the one end of the circuit board 15 can always remain in a flat state, avoiding the bending of the circuit board 15, thereby increasing the length of the flexible display panel 11 to be unfolded.

[0182] In some example embodiments of the present disclosure, referring to FIGS. 23-31, 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 and the orthographic projection of the chip on film 13 on the support plate 12 do not overlap with the groove 1231. Since the printed circuit board 15a and the chip on film 13 are bonded to the support plate 12, even if the groove 1231 is arranged on the support plate 12 under the printed circuit board 15a and the chip on film 13, it will be blocked by the printed circuit board 15a and the chip on film 13 and cannot engage with the driving gear 22. Moreover, the heat generated when the driving assembly 21 works can be directly transmitted to the surrounding circuit board 15, reducing the influence of thermal stress on the performance of components, effectively preventing the risk of physical collision and extrusion of the driving assembly 21 to the circuit board 15, and improving the long-term service life of components.

[0183] For example, referring to FIGS. 23-25, two, three, four or more groove columns 123 can be arranged on the side of the printed circuit board 15a away from the chip on film 13. Referring to FIGS. 26-27, two groove columns 123 at the edge of the third direction M can be arranged on both sides of the third direction M of the printed circuit board 15a, and one, two or more groove columns 123 in the middle can be arranged on the side of the printed circuit board 15a away from the chip on film 13; and the length of the one or two groove columns 123 in the middle can be the same or different. Referring to FIGS. 28-30, two printed circuit boards 15a can be arranged, and the two printed circuit boards 15a can be connected in sequence along the second direction Y, two groove columns 123 at the edge of the third direction M can be arranged on both sides of the third direction M of the printed circuit board 15a, and one, two or more groove columns 123 in the middle can be arranged on the side of the printed circuit board 15a farthest away from the chip on film 13 away from the chip on film 13; referring to FIG. 31, one, two or more groove columns 123 in the middle can be arranged on the side of the printed circuit board 15a farthest away from the chip on film 13 away from the chip on film 13, and one, two or more groove columns 123 in the middle can be arranged on the side of the printed circuit board 15a connected to the chip on film 13 away from the chip on film 13; and the length of the one or two groove columns 123 in the middle can be the same or different.

[0184] In addition, a position sensor can be arranged, through which the unfolding state of the flexible display module 1 can be monitored in real time, the position sensor can be electrically connected with the controller controlling the driving motor 211, and the controller can receive the position information transmitted by the position sensor to accurately control the unfolding and winding speed, ensuring the smoothness and responsiveness of user operation.

[0185] It should be noted that the circuit board 15 can include the printed circuit board 15a and the chip on film 13, and can also include a flexible circuit board and other devices for arranging components and wiring.

[0186] Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses or adaptive changes of the disclosure that follow the general principles of the disclosure and include known or customary practices in the art. The specification and examples are considered exemplary only, and the true scope and spirit of the disclosure are indicated by the appended claims.

Claims

1. A sliding roll display device, wherein, The application relates to a flexible display module. The flexible display module comprises a flexible display panel and a support plate. The support plate is arranged on the non-display side of the flexible display panel. The support plate is provided with a plurality of grooves extending along a first direction on one side of the support plate.

2. The sliding roll display device according to claim 1, wherein The grooves are arranged in at least one groove column along a second direction. The first direction is parallel to the support plate.

3. The sliding roll display device of claim 1, wherein, The second direction is parallel to the rolling direction of the flexible display module and intersects with the first direction. The driving mechanism comprises a driving gear and a driving assembly. The driving gear is engaged with the groove column.

4. The sliding roll display device of claim 3, wherein, The driving assembly is connected to the driving gear. The driving assembly is used to drive the driving gear to rotate, thereby driving the flexible display module to roll. The driving mechanism further comprises a buffer layer. The buffer layer is arranged on at least part of the tooth surface of the driving gear.

5. The flexible scroll display apparatus of claim 1, wherein, The modulus of the buffer layer is smaller than that of the driving gear.

6. The sliding roll display device of claim 5, wherein, The driving assembly comprises a driving motor and a speed reducer. The speed reducer is connected between the driving shaft and the driving gear.

7. The sliding roll display device of claim 5, wherein, The speed reducer comprises a first gear connected to the driving shaft and at least two second gears engaged with the outer periphery of the first gear. The diameter of the second gear is larger than that of the first gear. The driving gear is a gear ring. The inner side of the gear ring is provided with internal teeth. The outer side of the gear ring is provided with external teeth. At least two second gears are engaged with the internal teeth. The at least two second gears are rotatably connected to a retainer. The number of groove columns is at least two. The number of driving gears is the same as that of groove columns. The driving assembly comprises a first driving assembly. One first driving assembly drives at least two driving gears. The number of groove columns is even. The first driving assembly comprises a first driving motor. The first driving motor is provided with two first driving shafts arranged oppositely. The two first driving shafts are connected to two driving gears one by one. Alternatively, the number of groove columns is an odd number greater than one. The first driving assembly comprises a first driving motor. The first driving motor is provided with two first driving shafts arranged oppositely. The two first driving shafts are connected to two driving gears one by one. The driving assembly is provided with two fewer driving assemblies. The driving assembly further comprises a second driving assembly. The second driving assembly comprises a second driving motor. The second driving shaft of the second driving motor is connected to one driving gear. The rolling display device further comprises a connecting shaft connected between adjacent two driving gears. The connecting shaft is provided with at least one to make at least two driving gears connected in sequence.

8. The sliding roll display device of claim 7, wherein, The first driving assembly is provided as one; the first driving assembly comprises a first driving motor having a first driving shaft connected to at least two driving gears in series; or the first driving assembly comprises a first driving motor having two first driving shafts arranged oppositely, at least one of the first driving shafts being connected to at least two driving gears in series.

9. The flexible scroll display apparatus of claim 1, wherein, An 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. Or, the first direction is perpendicular to the second direction, and the driving gear is a straight gear.

10. The sliding roll display device of claim 9, wherein, When the number of groove columns is even, the extension directions of the grooves of different groove columns are symmetrically arranged, and a symmetric axis is a central axis of the support plate extending in the second direction; or when the number of groove columns is an odd number greater than one, the extension direction of the grooves of the groove column located in the middle is perpendicular to the second direction, and the extension directions of the grooves of different groove columns located on both sides are symmetrically arranged, and a symmetric axis is a central axis of the support plate extending in the second direction.

11. The sliding roll display device of claim 9, wherein, The groove columns comprise flattened groove columns, the flattened groove columns are arranged as an even number of columns, the extension directions of the grooves of the flattened groove columns have an angle greater than or equal to 30° and less than 90° with the second direction, and the extension directions of the grooves of different flattened groove columns are symmetrically arranged, and a symmetric axis is a central axis of the support plate extending in the second direction.

12. The flexible scroll display apparatus of claim 1, wherein, The sliding roll display device further comprises: A heat insulation layer is arranged on a side of the support plate away from the flexible display panel and between the driving assembly and the flexible display module.

13. The flexible scroll display apparatus of claim 1, wherein, The sliding roll display device further comprises: An outer shell is provided with two guide grooves arranged oppositely in a third direction; Two sliding parts are slidably fitted in the two guide grooves one by one, and the two sliding parts are fixed on opposite sides of the flexible display module in the third direction one by one, the third direction is parallel to the support plate, and the third direction is perpendicular to the second direction.

14. The flexible scroll display apparatus of 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 flexible scroll display apparatus of claim 13, wherein, The guide groove comprises: A first part extending in the second direction; A second part smoothly connected to the first part, the second part being arranged as an arc shape; A third part smoothly connected to the second part, the third part extending in the second direction, and the first part and the third part being located on the same side of the second part.

16. The flexible scroll display apparatus of claim 13, wherein, The width of the slot part of the guide groove is less than the width of the groove bottom part, and the sliding part is arranged in a structure matched with the guide groove.

17. The flexible scroll display device of claim 1, wherein, The support plate comprises: A body part; A plurality of convex strips fixed on a side of the body part away from the flexible display panel, and the grooves are between adjacent two convex strips.

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

19. The flexible scroll display device of claim 1, wherein, The edges of the groove are provided with chamfers.

20. The flexible scroll display apparatus of claim 1, wherein, The flexible display module comprises a bending portion and two flat plate portions, the two flat plate portions are connected to opposite sides of the bending portion, and the drive gear is at least matched with the bending portion of the flexible display module.

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