A flexible screen winding structure and a curl display device

Abstract

The application provides a flexible screen winding structure and a curling display device, wherein the flexible screen winding structure comprises a receiving part, the receiving part comprises a shell, an opening arranged on one side of the shell, a flexible screen winding shaft and a support winding shaft arranged in the shell, and the support winding shaft is located between the flexible screen winding shaft and the opening; a blocking part arranged on the outside of the shell; wherein the flexible screen winding shaft is used for being connected with one end of a flexible screen and being wound by the flexible screen, the support winding shaft is used for being connected with one end of a support and being wound by the support, the opening is used for penetrating the flexible screen and the support, and the blocking part is used for being fixedly connected with the other end of the flexible screen and the other end of the support.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a flexible screen roll-up structure and a roll-up display device. Background Technology

[0002] With the booming development of the flexible display industry, people have higher and higher expectations for flexible display products, and the demand for improved integration (multiple display sizes) and portability of display products is increasing.

[0003] Compared with traditional displays, flexible displays have advantages such as low power consumption, small size, excellent image quality, and flexible display capability. Applying flexible displays to portable display devices can undoubtedly further enhance the user experience. Therefore, how to reasonably design the structure of flexible display devices so that the devices can simultaneously achieve multiple display states such as large screen and small screen while being portable is one of the issues that needs to be studied in flexible displays. Summary of the Invention

[0004] This invention provides a winding structure for a flexible screen and a rollable display device for winding up a flexible screen.

[0005] In a first aspect, embodiments of the present invention provide a winding structure for a flexible screen, comprising:

[0006] The storage part includes a housing, an opening on one side of the housing, a flexible screen winding shaft and a support winding shaft disposed within the housing, and the support winding shaft is located between the flexible screen winding shaft and the opening.

[0007] A blocking part is provided on the outside of the housing;

[0008] The flexible screen winding shaft is used to connect to one end of the flexible screen and can be wound around the flexible screen; the support winding shaft is used to connect to one end of the support and can be wound around the support; the opening is used to pass through the flexible screen and the support; and the blocking part is used to be fixedly connected to the other end of the flexible screen and the other end of the support.

[0009] In one possible implementation, the storage unit further includes two constant torque springs, each comprising an output spool and a storage spool.

[0010] One end of the flexible screen take-up shaft is fixedly connected to the output spool of one of the constant torque springs, and the other end of the flexible screen take-up shaft is movably connected to the storage spool of another constant torque spring.

[0011] One end of the support member winding shaft is fixedly connected to the output spool of another constant torque spring, and the other end of the support member winding shaft is movably connected to the storage spool of another constant torque spring.

[0012] In one possible implementation, each of the constant torque springs further includes a metal spring, one end of which is fixedly connected to the corresponding output spool and the other end is connected to the corresponding storage spool and can be wound around the corresponding storage spool.

[0013] In one possible implementation, the storage unit further includes a first ball bearing and a fixed shaft disposed on each of the constant torque springs, which are sequentially close to the corresponding take-up shaft. The first ball bearing is embedded in the corresponding storage spool, one end of the fixed shaft is embedded in the first ball bearing, and the other end of the fixed shaft is embedded in the corresponding take-up shaft.

[0014] In one possible implementation, the receiving part further includes a second ball bearing disposed on the side of each spool of each constant torque spring away from the corresponding winding shaft, and a positioning pin embedded in the second ball bearing, the positioning pin being fixedly connected to the housing.

[0015] In one possible implementation, the storage section further includes a support roller disposed on the side of the support member's winding shaft near the opening.

[0016] In one possible implementation, along a direction parallel to the winding shaft of the support member, the support roller includes a plurality of sub-support rollers that are independently arranged, and the rotation of each sub-support roller does not affect the others.

[0017] In one possible implementation, the radius of the support member winding shaft is smaller than the radius of the flexible screen winding shaft, but larger than the radius of the support roller.

[0018] In one possible implementation, the distance between the rotation axis of the support member winding shaft and the bottom surface of the housing is greater than the distance between the rotation axis of the flexible screen winding shaft and the bottom surface, but less than the distance between the rotation axis of the support roller and the bottom surface.

[0019] Secondly, embodiments of the present invention also provide a rollable display device, comprising:

[0020] A flexible screen, a support member disposed away from the display surface of the flexible screen, and a winding structure as described in any of the above, wherein the flexible screen is connected to the flexible screen winding shaft through the opening in the winding structure, and the support member is connected to the support member winding shaft through the opening in the winding structure.

[0021] The beneficial effects of this invention are as follows:

[0022] This invention provides a flexible screen winding structure and a rollable display device. The winding structure includes a housing, an opening on one side of the housing, and a flexible screen winding shaft and a support winding shaft disposed within the housing. The flexible screen winding shaft connects to one end of the flexible screen and can be wound around it. The support winding shaft connects to one end of a support member and can be wound around it. The opening is for the flexible screen and the support member to pass through. In this way, the flexible screen and the support member can be wound around each other via the support winding shaft, ensuring the flatness of the flexible screen during the winding process and improving the performance of the flexible screen. Attached Figure Description

[0023] Figure 1 A perspective view of a flexible screen roll-up structure provided in an embodiment of the present invention;

[0024] Figure 2 Another perspective view of a flexible screen roll-up structure provided in an embodiment of the present invention;

[0025] Figure 3 This is a schematic cross-sectional view of one of the storage sections in a winding structure of a flexible screen provided in an embodiment of the present invention;

[0026] Figure 4 for Figure 3 A perspective view of two constant torque springs in the central storage section;

[0027] Figure 5 for Figure 4 A three-dimensional view of each constant torque spring in the middle;

[0028] Figure 6 for Figure 3 A schematic diagram of one decomposition of region Q in the middle region;

[0029] Figure 7 for Figure 3 An exploded view of one type of neutron support wheel;

[0030] Figure 8 for Figure 3 One method of fixing the neutron support wheel to the housing;

[0031] Figure 9 For along Figure 2 A schematic diagram of one type of cross-sectional structure in the direction shown in the middle NN;

[0032] Figure 10 This is a schematic diagram of one possible structure of the support structure in the unfolded state of a rollable display device provided in an embodiment of the present invention;

[0033] Figure 11This is a schematic diagram of one possible structure of the support structure in the closed state of a rollable display device provided in an embodiment of the present invention.

[0034] Explanation of reference numerals in the attached figures:

[0035] 10-Storage section; 100-Housing shell; 11-Opening; 200-Flexible screen winding shaft; 300-Support winding shaft; 20-Blocking section; 30-Flexible screen; 40-Support component; 50-Pull-out structure; 60-Bracket structure; 400-Constant torque spring; 401-1-Output spool; 401-2-Storage spool; 401-3-Metal spring; 402-First ball bearing; 403-Fixed shaft; 404-Second ball bearing Ball bearing; 405-Positioning pin; 500-Support roller; 510-Sub-support roller; 501-Roller; 502-Third ball bearing; 503-Limiting post; 110-First fixing part; 120-Semi-circular groove; 130-Second fixing part; 140-Threaded hole; 70-Flexible display; 80-Support layer; 600-Back film; 700-Pressure-sensitive adhesive; 800-Filter layer; 900-Optical transparent adhesive; 910-Cover plate. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Furthermore, the embodiments and features in the embodiments of the present invention can be combined with each other without conflict. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "inner," "outer," "upper," and "lower" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0038] It should be noted that the dimensions and shapes of the figures in the accompanying drawings do not reflect actual proportions and are intended only to illustrate the content of the invention. Furthermore, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0039] In related technologies, spiral torsion springs are often used to design the flexible screen to bend the entire device. As the number of winding turns increases, the torque gradually increases, eventually leading to the problem of excessive pulling force required to open the entire device and excessive pulling force on the screen when it is opened.

[0040] In view of this, embodiments of the present invention provide a winding structure for a flexible screen and a rollable display device for winding up a flexible screen.

[0041] like Figures 1 to 3 As shown, where, Figure 1 This is a perspective view of a flexible screen roll-up structure provided in an embodiment of the present invention. Figure 2 This is another perspective view of the winding structure. Figure 3 This is a schematic cross-sectional view of one possible structure of the storage section 10 in the winding structure. Specifically, the winding structure includes:

[0042] Storage section 10 includes housing 100, opening 11 on one side of housing 100, flexible screen winding shaft 200 and support winding shaft 300 disposed in housing 100, and the support winding shaft 300 is located between flexible screen winding shaft 200 and opening 11.

[0043] A blocking part 20 is provided on the outside of the housing 100;

[0044] The flexible screen winding shaft 200 is used to connect to one end of the flexible screen 30 and can be wound around the flexible screen; the support member winding shaft 300 is used to connect to one end of the support member 40 and can be wound around the support member; the opening 11 is used to pass through the flexible screen 30 and the support member 40; and the blocking part 20 is used to be fixedly connected to the other end of the flexible screen 30 and the other end of the support member 40.

[0045] In practical implementation, when the flexible screen needs to be stored, the flexible screen 30 can be wound onto the flexible screen take-up shaft 200, and simultaneously, the support member 40 used to support the flexible screen 30 can be wound onto the support member take-up shaft 300. Furthermore, the blocking part 20 can prevent the other end of the flexible screen 30 from also being taken into the storage part 10. When it is necessary to flatten the flexible screen 30, force can be applied to the blocking part 20 in a direction away from the storage part 10, thereby unwinding the flexible screen 30 from the flexible screen take-up shaft 200, and simultaneously unwinding the support member 40 from the support member take-up shaft 300. In this way, the flexible screen 30 and the support member 40 can be effectively flattened, ensuring the usability of the flexible screen 30 while the support member 40 effectively supports it. It should be noted that, still in conjunction with... Figure 1 and Figure 2 As shown, the winding structure also includes a pull-out structure 50 disposed together with the housing 100, and a bracket structure 60 (not shown in the figure) disposed on the side of the support member 40 facing away from the flexible screen 30; the bracket structure 60 is used to improve the overall support performance of the device, and the pull-out structure 50 provides auxiliary support. For example, the bracket structure 60 can be an accordion bracket structure, and its specific structure is described in the relevant sections below. Figure 1 This is a schematic diagram of the pull-out structure 50 and the support structure 60 when they are in the closed state. Figure 2 This is a schematic diagram of the pull-out structure 50 and the support structure 60 when they are in a flattened state.

[0046] In embodiments of the present invention, such as Figure 4 As shown, the storage part 10 also includes two constant torque springs 400, each of which includes an output spool 401-1 and a storage spool 401-2.

[0047] One end of the flexible screen take-up shaft 200 is fixedly connected to the output shaft 401-1 of the constant torque spring 400, and the other end of the flexible screen take-up shaft 200 is movably connected to the storage shaft 401-2 of the other constant torque spring 400.

[0048] One end of the support member winding shaft 300 is fixedly connected to the output shaft 401-1 of another constant torque spring 400, and the other end of the support member winding shaft 300 is movably connected to the storage shaft 401-2 of another constant torque spring 400.

[0049] In specific implementation, one end of the flexible screen winding shaft 200 is fixedly connected to the output spool 401-1 of a constant torque spring 400, allowing the flexible screen winding shaft 200 and the output spool 401-1 of the constant torque spring 400 to rotate synchronously. Furthermore, the other end of the flexible screen winding shaft 200 is movably connected to the storage spool 401-2 of another constant torque spring 400, allowing relative rotation between the flexible screen winding shaft 200 and the storage spool 401-2 of the other constant torque spring 400, facilitating subsequent winding of the flexible screen 30 using the flexible screen winding shaft 200. Additionally, one end of the support member winding shaft 300 is fixedly connected to the output spool 401-1 of the other constant torque spring 400, allowing the support member winding shaft 300 and the output spool 401-1 of the other constant torque spring 400 to rotate synchronously. Furthermore, the other end of the support member winding shaft 300 is movably connected to the storage spool 401-2 of the aforementioned constant torque spring 400. This allows for relative rotation between the support member winding shaft 300 and the storage spool 401-2 of the aforementioned constant torque spring 400, facilitating subsequent winding of the support member via the support member winding shaft 300. Figure 4 In the exemplary embodiment shown, reference numeral 400-1 indicates a constant torque spring providing winding force to the flexible screen, and reference numeral 400-2 indicates a constant torque spring providing winding force to the support member 40. In practical applications, because the two constant torque springs 400 can provide constant torque for the winding of the flexible screen 30 and the support member 40 during the winding process, the torque will not change with the increase of the number of rotations, thereby avoiding the problem of excessive torque of the whole machine, improving the performance of the winding structure, and providing favorable guarantee for the subsequent winding of the flexible screen 30 and the support member 40.

[0050] The following is combined Figure 4 The movement of the storage section 10 during the unfolding process of the entire machine in the embodiment of the present invention will be explained. At position ①, the flexible screen winding shaft 200 and the output spool of the constant torque spring 400-1 providing winding force to the flexible screen 30 are fixed and move synchronously. At position ②, the flexible winding shaft 200 and the storage spool of the constant torque spring 400-2 providing winding force to the support member 40 are not fixed and can rotate relative to each other. At position ③, the support member winding shaft 300 and the storage spool of the constant torque spring 400-1 providing winding force to the flexible screen 30 are not fixed and can rotate relative to each other. At position ④, the support member winding shaft 300 and the output spool of the constant torque spring 400-2 providing winding force to the support member 40 are fixed and rotate synchronously. This ensures that the subsequent winding structure can roll up the flexible screen 30 and the support member 40 during the flattening and winding process of the entire machine.

[0051] In embodiments of the present invention, such as Figure 5As shown, each of the constant torque springs 400 also includes a metal spring sheet 401-3. One end of the metal spring sheet 401-3 is fixedly connected to the corresponding output spool 401-1, and the other end is connected to the corresponding storage spool 401-2 and can be wound around the corresponding storage spool 401-2.

[0052] In embodiments of the present invention, such as Figure 6 As shown Figure 3 One exploded view of region Q is shown, where reference numeral 401 denotes a single constant torque torsion spring. Specifically, the storage section 10 also includes a first ball bearing 402 and a fixed shaft 403 disposed on each of the constant torque springs 400, which are sequentially close to the corresponding take-up shaft. The first ball bearing 402 is embedded in the corresponding storage spool 401-2, one end of the fixed shaft 403 is embedded in the first ball bearing 402, and the other end of the fixed shaft 403 is embedded in the corresponding take-up shaft.

[0053] In practical implementation, one end of the fixed shaft 403 can be embedded in the inner diameter of the first ball bearing 402, and the other end of the fixed shaft 403 can be embedded in the corresponding take-up shaft. The fixed shaft 403 can connect the corresponding take-up shaft to the first ball bearing 402. One end of the first ball bearing 402 can be embedded in the storage spool 401-2 of the corresponding constant torque spring 400, and can be set in a position where relative rotation can occur, thereby reducing rotational friction.

[0054] In the embodiments of the present invention, it is still combined with Figure 6 As shown, the storage part 10 also includes a second ball bearing 404 disposed on the side of each spool of each constant torque spring 400 away from the corresponding winding shaft, and a positioning pin 405 embedded in the second ball bearing 404, the positioning pin 405 being fixedly connected to the housing 100.

[0055] In specific implementation, the rotatable characteristics of the storage spools 401-2 are ensured by the first ball bearing 402 and the second ball bearing spool set on each constant torque spring 400, making it possible for the flexible screen 30 to be wound up and the support member 40 to be wound up. Furthermore, the positioning pin 405 embedded in the second ball bearing 404 is fixedly connected to the housing 100. For example, the positioning pin 405 is fixed to the side wall of the entire housing, thereby providing axial positioning for the spools of each constant torque spring 400, and each spool can rotate on the positioning pin 405. In this embodiment of the invention, the following is still combined with... Figure 3 As shown, the storage section 10 also includes a support roller 500 disposed on the side of the support member winding shaft 300 near the opening 11.

[0056] In the specific implementation process, the support roller 500 can be set at the junction of the winding area and the flattening area. On the one hand, this can ensure that the pull-out height of the flexible screen 30 and the support member 40 is always consistent during the subsequent pull-out process. On the other hand, the support roller 500 can rotate during the winding process, thereby reducing the friction when the flexible screen 30 and the support member 40 are pulled out, and improving the performance of the winding structure.

[0057] In the embodiments of the present invention, it is still combined with Figure 3 As shown, along the extension direction parallel to the winding shaft 300 of the support member, the support roller 500 includes a plurality of sub-support rollers 510 that are independently arranged, and the rotation of each sub-support roller 510 does not affect each other.

[0058] In practical implementation, the support roller 500 can adopt a segmented design, with multiple independent sub-support rollers 510 arranged along the extension direction parallel to the support member's winding shaft 300. The rotational properties of each sub-support roller 510, such as its speed, do not affect each other, thus avoiding insufficient strength due to the support roller 500 being too thin and too long. In practical applications, the rotational speed of each sub-support roller 501 is usually roughly consistent with the speed at which the flexible screen 30 is pulled out. Moreover, the independent arrangement of each sub-support roller 510 avoids deformation under pressure due to excessive length of the support roller 500, ensuring the performance of the flexible screen 30 when it is flattened. Figure 3 Taking the exemplary embodiment shown as an example, along the extension direction parallel to the winding shaft 300 of the support member, the support roller 500 includes four sub-support rollers 510 that are independently arranged, and the rotation of each sub-support roller 510 does not affect each other.

[0059] In the specific implementation process, such as Figure 7 As shown Figure 3 An exploded view of one of the sub-support wheels 510. Each sub-support wheel 510 includes a roller 501, a third ball bearing 502 disposed on opposite sides of the roller 501, and a limiting post 503. The limiting post 503 corresponding to the sub-support wheel 510 closest to the housing 100 has one end embedded in the inner diameter of the third ball bearing 502, and the other end fixed to the housing 100, for axial positioning of the roller 501.

[0060] In one exemplary embodiment, such as Figure 8As shown, the fixing method between the sub-support roller 510 and the housing 100 can be as follows: first, the limiting post 503 on one side of the roller 501 is placed in the semi-circular groove 120 of the first fixing part 110 of the housing 100; then, the second fixing part 130 of the housing 100 is fixed to the first fixing part 110 through the threaded hole 140, thereby realizing the fixed setting between each sub-support roller 510 and the housing 100, ensuring the structural stability of the winding structure. The first fixing part 110 and the second fixing part 130 are part of the housing 100. Of course, the fixing method between the sub-support roller 510 and the housing 100 can be set according to actual application needs, and is not limited here.

[0061] In one exemplary embodiment, the radius of the support member winding shaft 300 is smaller than the radius of the flexible screen winding shaft 200, but larger than the radius of the support roller 500.

[0062] For example, the radius of the support member winding shaft 300 is 'a', the radius of the flexible screen winding shaft 200 is 'b', and the radius of the support roller 500 is 'c'. The values ​​of the radii satisfy the relationship: c < a < b. This avoids damage to the flexible screen 30 due to excessive winding during subsequent winding. For example, the radius of the flexible screen winding shaft 200 ranges from 3mm to 6mm, for example, b is 4mm; the radius of the support member winding shaft 300 ranges from 3mm to 6mm, for example, a is 3mm; and the radius of the support roller 500 ranges from 1.5mm to 3mm, for example, c is 1.5mm.

[0063] It should be noted that, in the embodiments of the present invention, the numerical relationship between the radius of the support member winding shaft 300, the radius of the flexible screen winding shaft 200 and the radius of the support roller 500 can also be set according to the actual application needs. Correspondingly, the specific values ​​of their respective radii can also be set according to the actual application needs, which are not limited here.

[0064] In one exemplary embodiment, the distance between the rotation axis of the support member winding shaft 300 and the bottom surface of the housing 100 is greater than the distance between the rotation axis of the flexible screen winding shaft 200 and the bottom surface, and less than the distance between the rotation axis of the support roller 500 and the bottom surface.

[0065] For example, the distance between the rotation axis of the support member winding shaft 300 and the bottom surface of the housing 100 is d1, the distance between the rotation axis of the flexible screen winding shaft 200 and the bottom surface is d2, and the distance between the rotation axis of the support roller 500 and the bottom surface is d3. The values ​​of these three distances satisfy the relationship: d2 < d1 < d3. In specific implementations, the specific values ​​of the distances between each rotation axis and the bottom surface of the housing 100 can be set according to the actual application, and are not limited here. Moreover, the above settings are more conducive to the winding of the flexible screen 30 and the support member 40.

[0066] It should be noted that, in the embodiments of the present invention, the distance between the rotation axis of the support member winding shaft 300 and the bottom surface of the housing 100, the distance between the rotation axis of the flexible screen winding shaft 200 and the bottom surface, and the distance between the rotation axis of the support roller and the bottom surface can be set according to actual application needs. Correspondingly, the specific values ​​of the distance between their respective rotation axes and the bottom surface of the housing 100 can also be set according to actual application needs, which are not limited here.

[0067] It should be noted that in practical applications, due to the rebound force of the flexible screen 30, an arching phenomenon may occur at the output shaft position. When the dimensions of the storage spools 401-2 and output spools 401-1 of each constant torque spring 400 are approximately equal, setting the axis position of the flexible screen take-up shaft 200 lower than that of the support take-up shaft 300 ensures that the flexible screen 30 adheres more tightly to the support member 40 on the support take-up shaft 300 when the entire machine is stretched, thereby improving the performance of the take-up structure. For example, the distance difference between the two axis positions ranges from 0.5mm to 1.5mm. For instance, 0.5mm. In practical applications, the specific distance difference between the axis positions of the flexible screen take-up shaft 200 and the support take-up shaft 300 can be set as needed, and is not limited here.

[0068] In one exemplary embodiment, the winding structure further includes a locking part for locking the movement of the flexible screen 30, a driving part for driving the movement of the blocking part 20, and a control part for controlling the driving part. It should be noted that the locking part, driving part, and control part are not shown in the accompanying drawings; these structures can be configured according to actual application needs and will not be detailed here. Furthermore, the locking part is a device that restricts the rotation of the flexible screen winding shaft 200 and the support member winding shaft 300, and can be released under the action of the actuating member. When it is necessary to unfold the flexible screen 30, the control part controls the driving part to operate, applying a force away from the storage part 10 to the blocking part 20. Accordingly, the flexible screen 30 is unwound from the flexible screen winding shaft 200, and the support member 40 is unwound from the support member winding shaft 300. The flexible screen 30 and the support member 40 then extend and unfold from the opening 11 of the storage part 11. Furthermore, when the unfolded size of the flexible screen 30 reaches a set threshold, the force is stopped. The rotation of the flexible screen winding shaft 200 and the support member winding shaft 300 can be restricted by the locking part. At this time, the constant torque spring 400 in the storage part 10 continuously applies tension to the flexible screen 30 and the support member 40, ensuring the flatness of the flexible screen 30 when it is unfolded.

[0069] When it is necessary to retract or reduce the size of the flexible screen 30, the rotation restriction of the flexible screen winding shaft 200 and the support member winding shaft 300 by the locking part is first released. The drive unit is then controlled by the control unit to apply a force close to the storage part 10 to the blocking part 20. Correspondingly, the constant torque spring 400 applies force to rotate the flexible screen winding shaft 200 and the support member winding shaft 300, causing the flexible screen 30 to wind onto the flexible screen winding shaft 200 and the support member 40 to wind onto the support member winding shaft 300. In particular, the winding action stops when the blocking part 20 contacts the housing 100 of the storage part 10.

[0070] Of course, the flexible screen winding structure provided in this embodiment of the invention may include other structures besides those mentioned above, depending on the actual application requirements, and is not limited here.

[0071] Based on the same inventive concept, such as Figure 1 and Figure 2 As shown, this embodiment of the invention also provides a rollable display device, which includes:

[0072] The flexible screen 30, the support member 40 disposed on the display surface opposite to the flexible screen 30, and the winding structure as described above, wherein the flexible screen 30 is connected to the flexible screen winding shaft 200 through the opening 11 in the winding structure, and the support member 40 is connected to the support member winding shaft 300 through the opening 11 in the winding structure.

[0073] In a specific implementation, the flexible screen 30 can be a flexible organic light-emitting diode (OLED), and correspondingly, the rollable display device can be an OLED flexible display device; in one exemplary embodiment, such as Figure 9 The image shows a rollable display device along... Figure 2 A cross-sectional structural diagram in the direction shown in the diagram. Specifically, in this rollable display device, the flexible screen 30 includes a flexible display 70 and a support layer 80 disposed on the back of the flexible display 70; a back film 600 and a pressure-sensitive adhesive (PSA) 700 disposed between the support layer 80 and the flexible display 70; and a filter layer 800, an optically transparent adhesive (OCA) 900, and a cover plate 910 disposed on the front of the flexible display 70.

[0074] The support layer 80 is used to improve the flatness of the flexible screen 30. For example, the support layer 80 includes two layers of foam structure and a partially perforated stainless steel metal layer located between the two foam structures. For instance, the elastic modulus of the support layer 80 is 5 MPa to 10 MPa, and its thickness is 80 μm to 120 μm. The back film 600 can be used as a back protective layer for the flexible screen 30. For example, the elastic modulus of the back film 600 can be 2 GPa to 4 GPa. The filter layer 800 can be a polarizer or a color filter. This polarizer not only reduces the reflection of ambient light by the flexible screen 30, improving the user experience, but also prevents the influence of ambient light on the organic light-emitting material, ensuring the lifespan of the organic light-emitting material and improving the performance of the flexible screen 30. For example, the elastic modulus of the polarizer can be 3.5 GPa to 4.5 GPa, and its thickness can be 35 μm to 55 μm. Polarizing films are generally quite thick. When a color filter is used in the filter layer 800, a Color Filter On Encapsulation (COE) technology is employed to ensure a thin and light design for the rollable display device. The cover plate 910, located on the filter layer 800, not only protects the relevant film layers from damage but also enhances the performance of the rollable display device by providing a functional coating on the cover plate 900.

[0075] For example, the coating may be one or more of an anti-glare (AG) protective film, an anti-fingerprint (AF) protective film, and an anti-ultraviolet (UV) protective film, and is not limited herein. The elastic modulus of the cover plate 910 may be 100 MPa to 300 MPa, and the thickness may be 50 μm to 150 μm. Furthermore, the other essential components of the flexible screen 30 and the rollable display device are as would be understood by those skilled in the art, and will not be described in detail here, nor should they be construed as limiting the embodiments of the present invention.

[0076] Furthermore, the rollable display device also includes a support member 40 and a bracket structure 60 disposed on the side of the support member 40 facing away from the flexible screen 30, which improves the overall support performance of the device. In one exemplary embodiment, the bracket structure 60 may be as follows: Figure 10 and Figure 11 The organ support structure shown. Among them, Figure 10 The diagram shown is one of the structural schematics of the support structure 60 in its unfolded state. Figure 11 The diagram shows one of the structural schematics of the support structure 60 in the closed state.

[0077] For example, the support member 40 can be a multi-layer composite material composed of patterned stainless steel (SUS), foam, and biomimetic adhesive. The pattern of the stainless steel (SUS) can be prepared using etching or laser processing. The biomimetic adhesive is applied to the surface of the support member 40. In the entire device, when the support member 40 is unfolded, the biomimetic adhesive contacts the back of the flexible screen 30. Through the special micro-suction cup structure on the biomimetic adhesive, the support member 40 and the flexible screen 30 can adhere together, providing effective support for the screen and thus improving the flatness of the flexible screen 30. Moreover, during the winding process, the support member 40 and the flexible screen 30 can separate. In particular, when the separation angle between the screen and the biomimetic adhesive is greater than 10°, they can separate with a small separation force, facilitating their respective winding onto the corresponding winding shaft. The foam effectively prevents damage to the support member 40 due to friction during winding. This improves the performance of the winding structure during flattening and winding, ensuring the performance of the rollable display device.

[0078] In practice, the principle of this rollable display device in solving the problem is similar to the winding structure of the aforementioned flexible screen. Therefore, the implementation of this rollable display device can refer to the implementation of the aforementioned winding structure, and the repeated parts will not be described again.

[0079] In specific implementations, the rollable display device provided in this invention can be any product or component with display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator. Other essential components of this rollable display device are understood by those skilled in the art and will not be described in detail here, nor should they be construed as limiting the invention.

[0080] This invention provides a flexible screen winding structure and a rollable display device. The winding structure includes a housing, an opening on one side of the housing, and a flexible screen winding shaft and a support winding shaft disposed within the housing. The flexible screen winding shaft connects to one end of the flexible screen and can be wound around it. The support winding shaft connects to one end of a support member and can be wound around it. The opening is for the flexible screen and the support member to pass through. In this way, the flexible screen and the support member can be wound around each other via the support winding shaft, ensuring the flatness of the flexible screen during the winding process and improving the performance of the flexible screen.

[0081] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the invention.

[0082] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A winding structure of a flexible screen, characterized in that, The application relates to a flexible screen storage device. The device comprises a housing, an opening on one side of the housing, a flexible screen winding shaft and a support winding shaft arranged in the housing, and the support winding shaft is located between the flexible screen winding shaft and the opening. A blocking part is arranged outside the housing. The flexible screen winding shaft is used for connecting one end of a flexible screen and being wound by the flexible screen, the support winding shaft is used for connecting one end of a support and being wound by the support, the opening is used for penetrating the flexible screen and the support, and the blocking part is used for fixedly connecting the other end of the flexible screen and the other end of the support.

2. The winding structure of claim 1, wherein, The support is attached to the side away from the display surface of the flexible screen, and the support is consistent with the extension direction of the flexible screen. The support is wound or unwound synchronously with the flexible screen. The support is a multilayer composite material, which comprises patterned stainless steel, foam and biomimetic glue material.

3. The winding structure of claim 2, wherein, The biomimetic glue material is arranged towards the flexible screen to be attached to the flexible screen through the micro-sucker structure of the biomimetic glue material when being unwound, and the low force separation is realized when the separation angle is greater than 10 degrees.

4. The winding structure of claim 3, wherein The device further comprises two constant torque springs, which comprise output spools and storage spools.

5. The winding structure of claim 4, wherein, One end of the flexible screen winding shaft is fixedly connected with the output spool of one constant torque spring, and the other end of the flexible screen winding shaft is movably connected with the storage spool of the other constant torque spring.

6. The winding structure according to any one of claims 1 to 5, wherein One end of the support winding shaft is fixedly connected with the output spool of the other constant torque spring, and the other end of the support winding shaft is movably connected with the storage spool of one constant torque spring.

7. The winding structure of claim 6, wherein Each constant torque spring further comprises a metal elastic sheet, one end of the metal elastic sheet is fixedly connected with the corresponding output spool, and the other end of the metal elastic sheet is connected with the corresponding storage spool and can be wound by the corresponding storage spool.

8. The winding structure of claim 6, wherein, The device further comprises first ball bearings and fixed shafts arranged on the storage spools of the constant torque springs in sequence close to the corresponding winding shafts.

9. The winding structure of claim 6, wherein, The first ball bearings are embedded in the corresponding storage spools, one end of the fixed shafts is embedded in the first ball bearings, and the other end of the fixed shafts is embedded in the corresponding winding shafts.

10. A rollable display device, characterized by, The device further comprises second ball bearings arranged on the sides of the spools of the constant torque springs away from the corresponding winding shafts, and positioning pin shafts embedded in the second ball bearings. The positioning pin shafts are fixedly connected with the housing. The device further comprises support rollers arranged on the side of the support winding shaft close to the opening. The support rollers comprise a plurality of sub-support rollers arranged independently of each other along the extension direction of the support winding shaft, and the rotation of each sub-support roller does not affect each other. The radius of the support winding shaft is smaller than the radius of the flexible screen winding shaft and larger than the radius of the support rollers. The distance between the rotation axis of the support winding shaft and the bottom surface of the housing is larger than the distance between the rotation axis of the flexible screen winding shaft and the bottom surface, and smaller than the distance between the rotation axis of the support rollers and the bottom surface. The application relates to a flexible screen storage device. A flexible screen, a support arranged away from a display surface of the flexible screen, and a winding structure as claimed in any one of claims 1 to 9, the flexible screen being connected to the flexible screen winding shaft through the opening in the winding structure, and the support being connected to the support winding shaft through the opening in the winding structure.

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