Sliding Roll Module and Its Tensile Force Application Device, Sliding Roll Display Device

Abstract

The present application discloses a sliding roll module, its tensile force applying device, and a sliding roll display device, relating to the field of display technologies. The first force applying part of the tensile force applying device is used to connect with the cover plate of the display module in the sliding roll module, and the second force applying part is used to connect with the support member of the display module in the sliding roll module, so that the cover plate and the support member jointly share the tensile force applied by the tensile force applying device. Thus, when the tensile force applying device bends and pulls one end of the display module to the non-display surface, it can avoid the misalignment of each film layer in the flexible display panel in the display module, and can also avoid the generation of cracks in the flexible display panel, ensuring the reliability of the flexible display panel, and thereby improving the yield of the sliding roll display device.

Description

Technical Field

[0001] This application relates to the field of display technologies, and particularly to a rollable module and a tensile force applying device thereof. Background Art

[0002] With the development of display technologies, flexible rollable display devices have become a new development direction in display technologies.

[0003] In related technologies, a rollable display device includes a flexible display panel. The flexible display panel has a display area and a bending area, and one end of the bending area is connected to the display area, and the other end applies a tensile force to bend to the back side of the display area.

[0004] However, when the flexible display panel is bent, the bending radii of different film layers in the flexible display panel are different. Therefore, there is misalignment of the film layers in the flexible display panel, and the yield rate of the rollable display device is low. Summary of the Invention

[0005] This application provides a rollable module, a tensile force applying device thereof, and a rollable display device, which can solve the problem of low yield rate of rollable display devices in related technologies. The technical solutions are as follows:

[0006] On the one hand, a tensile force applying device is provided. The tensile force applying device includes:

[0007] A first force applying part, which is used to connect with a cover plate in the rollable module;

[0008] A second force applying part, which is oppositely arranged with the first force applying part, and the second force applying part is used to connect with a support member in the rollable module;

[0009] And an elastic stretching member, which is located between the first force applying part and the second force applying part, and one end of the elastic stretching member is connected to the first force applying part, and the other end is connected to the second force applying part.

[0010] Optionally, the surface of the first force applying part close to the second force applying part has a first groove, and the surface of the second force applying part close to the first force applying part has a second groove, and the positions of the first groove and the second groove are opposite;

[0011] The elastic stretching member is located in the first groove and the second groove, and one end of the elastic stretching member is connected to the bottom surface of the first groove, and the other end is connected to the bottom surface of the second groove.

[0012] Optionally, there are gaps between the elastic stretching member and the first groove, and between the elastic stretching member and the second groove.

[0013] Optionally, the cover plate and the support member are located between the first force application portion and the second force application portion;

[0014] The first force application portion includes a first positioning post near the surface of the second force application portion. The cover plate has a first positioning hole, and the first positioning post is located within the first positioning hole to connect the first force application portion and the cover plate;

[0015] The second force application portion includes a second positioning post near the surface of the first force application portion. The support member has a second positioning hole, and the second positioning post is located within the second positioning hole to connect the second force application portion and the support member.

[0016] Optionally, the first force application portion includes a first step structure located between the first groove and the first positioning post. The first step structure has a first surface, a second surface, and a third surface located between the first surface and the second surface. Both the first surface and the second surface are parallel to the surface of the first force application portion away from the second force application portion, the third surface is perpendicular to the first surface, and the third surface is used to contact the side surface of the cover plate;

[0017] The second force application portion includes a second step structure located between the second groove and the second positioning post. The second step structure has a fourth surface, a fifth surface, and a sixth surface located between the fourth surface and the fifth surface. Both the fourth surface and the fifth surface are parallel to the surface of the second force application portion away from the first force application portion, the sixth surface is perpendicular to the fourth surface, and the sixth surface is used to contact the side surface of the support member.

[0018] Optionally, the first positioning post is located on the first surface, and the first surface is used to contact the surface of the cover plate away from the support member;

[0019] The second positioning post is located on the fourth surface, and the fourth surface is used to contact the surface of the support member away from the cover plate.

[0020] Optionally, the number of the first positioning posts included in the first force application portion is equal to the number of the second positioning posts included in the second force application portion.

[0021] On the other hand, a slip-roll module is provided. The slip-roll module includes a display module and the tension application device described in the above aspect; the display module includes:

[0022] A flexible display panel having a display surface and a non-display surface;

[0023] A cover plate located on the display surface of the flexible display panel;

[0024] and a support member located on the non-display surface of the flexible display panel;

[0025] Wherein, the first force-applying part of the tensile force applying device is connected to the cover plate, and the second force-applying part of the tensile force applying device is connected to the support member. The tensile force applying device is configured to apply a tensile force to the cover plate and the support member to bend at least a part of the flexible display panel, the cover plate, and the support member to the non-display surface.

[0026] Optionally, the cover plate includes a first part and a second part. The orthographic projection of the first part on the flexible display panel overlaps with the flexible display panel, and the orthographic projection of the second part on the flexible display panel does not overlap with the flexible display panel. The second part has a first positioning hole;

[0027] The support member includes a third part and a fourth part. The orthographic projection of the third part on the flexible display panel overlaps with the flexible display panel, and the orthographic projection of the fourth part on the flexible display panel does not overlap with the flexible display panel. The fourth part has a second positioning hole.

[0028] In another aspect, a rollable display device is provided. The rollable display device includes: a power supply component and a rollable module as described in the above aspect;

[0029] The power supply component is configured to supply power to the rollable module.

[0030] The beneficial effects brought by the technical solution provided in this application at least include:

[0031] This application provides a rollable module, its tensile force applying device, and a rollable display device. The first force-applying part of the tensile force applying device is used to connect to the cover plate of the display module in the rollable module, and the second force-applying part is used to connect to the support member of the display module in the rollable module, so that the cover plate and the support member jointly share the tensile force applied by the tensile force applying device. Thus, when the tensile force applying device bends and pulls one end of the display module to the non-display surface, it can avoid the misalignment of each film layer in the flexible display panel of the display module and can also avoid the generation of cracks in the flexible display panel, ensuring the reliability of the flexible display panel, and thereby improving the yield rate of the rollable display device. Description of the Drawings

[0032] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0033] Figure 1 It is a schematic structural diagram of a display module in a sliding and rolling module in the related art;

[0034] Figure 2 It is a schematic diagram of one end of the display module in a sliding and rolling module in the related art being subjected to a pulling force;

[0035] Figure 3 It is a schematic structural diagram of a sliding and rolling module provided by an embodiment of the present application;

[0036] Figure 4 It is a schematic structural diagram of a display module in a sliding and rolling module provided by an embodiment of the present application;

[0037] Figure 5 It is a top view of a cover plate provided by an embodiment of the present application;

[0038] Figure 6 It is a top view of a support member provided by an embodiment of the present application;

[0039] Figure 7 It is a schematic structural diagram of a pulling force applying device in another sliding and rolling module provided by an embodiment of the present application;

[0040] Figure 8 It is a schematic structural diagram of another sliding and rolling module provided by an embodiment of the present application;

[0041] Figure 9 It is a schematic diagram of the fixation of a pulling force applying device and a display module provided by an embodiment of the present application;

[0042] Figure 10 It is a top view of a cover plate and a first force applying portion provided by an embodiment of the present application;

[0043] Figure 11 It is a top view of a support member and a second force applying portion provided by an embodiment of the present application;

[0044] Figure 12 It is a schematic structural diagram of the first force applying portion of a pulling force applying device provided by an embodiment of the present application;

[0045] Figure 13 It is a schematic structural diagram of the second force applying portion of a pulling force applying device provided by an embodiment of the present application. Detailed implementation manners

[0046] To make the objectives, technical solutions, and advantages of the present application clearer, the following will further describe the embodiments of the present application in detail with reference to the accompanying drawings.

[0047] Figure 1 It is a schematic structural diagram of a display module in a sliding and rolling module in the related art. Refer toFigure 1 As can be seen, the display module 101 may include: a flexible display panel 1011, a cover plate 1012, and a support member 1013.

[0048] Among them, the flexible display panel 1011 has a display surface 1011a and a non-display surface 1011b. The cover plate 1012 is located on the display surface 1011a of the flexible display panel 1011, and is used to protect the display surface 1011a of the flexible display panel 1011, and prevent the display surface 1011a of the flexible display panel 1011 from being scratched. The support member 1013 is located on the non-display surface 1011b of the flexible display panel 1011, and is used to support the flexible display panel 1011.

[0049] In the related art, one end (the force-applying end) of the flexible display panel 1011 in the sliding and rolling module 10 needs to be applied with a pulling force by a pulling force applying device, so as to bend one end of the flexible display panel 1011 to the non-display surface of the flexible display panel 1011. Refer to Figure 2 , after applying the pulling force by the pulling force applying device, the display surface 1011a (the display surface 1011a is the side close to the cover plate 1012) of the flexible display panel 1011 is closer to the outside of the bending part of the flexible display panel 1011 than the non-display surface 1011b (the non-display surface 1011b is the side close to the support member 1013). Thus, after one end of the flexible display panel 1011 is bent, the bending radius r1 of the cover plate 1012 will be greater than the bending radius r2 of the support member 1013. Figure 2 The pulling force applying device is not shown in

[0050] Generally, the pulling force applying device can apply a pulling force to the support member 1013 to drive the flexible display panel 1011 and the cover plate 1012 to bend. However, since the bending radius r1 of the support member 1013 is smaller than the bending radius r2 of the cover plate 1012, applying a pulling force to the support member 1013 will exacerbate the difference in the bending radii of the two, and further exacerbate the dislocation problem between the various film layers in the flexible display panel 1011, and will cause the bending part of the flexible display panel 1011 to arch, resulting in a low yield of the sliding and rolling display device. Or, the pulling force applying device can apply a pulling force to the cover plate 1012 to drive the flexible display panel 1011 and the support member 1013 to bend. However, since a hard coating is usually applied on the cover plate 1012, and the sliding and rolling module is usually fixed to the housing through the support member 1013, applying a pulling force to the cover plate 1012 will cause cracks in the hard coating, and cause a transverse shearing force in the sliding and rolling module, and further cause cracks in the various film layers in the flexible display panel 1011 due to the influence of the shearing force, and the yield of the sliding and rolling display device is low.

[0051] In the embodiments of the present application, refer to Figure 3, the tension applying device 202 included in the sliding and rolling module 20 can apply tension to the cover plate 2012 and the support member 2013 simultaneously, so as to bend at least part of the flexible display panel 2011, the cover plate 2012 and the support member 2013 to the non-display surface 2011b. Thus, the cover plate 2012 and the support member 2013 can share the tension jointly, achieving the purpose of bending at least part of the flexible display panel 2011, the cover plate 2012 and the support member 2013 to the non-display surface 2011b. Through the tension applying method provided by the embodiments of the present application, on the one hand, when tension is applied to the support member 2013 alone, the problem of misalignment between the various film layers in the flexible display panel 2011 and the problem of arching of the bent part of the flexible display panel 2011 can be avoided; on the other hand, when tension is applied to the cover plate 2012 alone, the problem that the flexible display panel 2011 generates cracks due to the influence of shear force can be avoided.

[0052] In order to enable the tension applying device 202 to apply tension to the support member 2013 and the cover plate 2012 simultaneously, referring to Figure 3 and Figure 4 , the force application ends of the cover plate 2012 and the support member 2013 can have extended parts relative to the flexible display panel 2011, and further, the tension applying device 202 can apply tension to the extended part of the cover plate 2012 relative to the flexible display panel 2011 and to the extended part of the support member 2013 relative to the flexible display panel 2011.

[0053] Optionally, referring to Figure 4 , the cover plate 2012 includes a first part 20121 and a second part 20122. Among them, the orthographic projection of the first part 20121 on the flexible display panel 2011 overlaps with the flexible display panel 2011, and the orthographic projection of the second part 20122 on the flexible display panel 2011 does not overlap with the flexible display panel 2011. That is to say, the second part 20122 of the cover plate 2012 can be the extended part of the cover plate 2012 relative to the flexible display panel 2011, and the tension applying device 202 can be connected to the second part 20122 of the cover plate 2012.

[0054] Among them, referring to Figure 5 , the second part 20122 can have a first positioning hole a1, and the first force application part 2021 of the tension applying device 202 can be connected to the first positioning hole a1.

[0055] Correspondingly, referring to Figure 4, the support member 2013 includes a third portion 20131 and a fourth portion 20132. Among them, the orthographic projection of the third portion 20131 on the flexible display panel 2011 overlaps with the flexible display panel 2011, and the orthographic projection of the fourth portion 20132 on the flexible display panel 2011 does not overlap with the flexible display panel 2011. That is to say, the fourth portion 20132 of the support member 2013 can be an extended portion of the support member 2013 relative to the flexible display panel 2011, and the tensile force applying device 202 can be connected to the fourth portion 20132 of the support member 2013.

[0056] Among them, referring to Figure 6 , the fourth portion 20132 can have a second positioning hole a2, and the second force applying portion 2022 of the tensile force applying device 202 can be connected to the second positioning hole a2.

[0057] Referring to Figure 3 and Figure 4 , the display module 201 further includes a polarizer (POL) located between the flexible display panel 2011 and the cover plate 2012, and a back film (BM) located between the flexible display panel 2011 and the support member 2013.

[0058] Optionally, the flexible display panel 2011 can be an organic light-emitting diode (OLED) display panel.

[0059] Figure 7 is a schematic structural diagram of a tensile force applying device of a sliding and rolling module provided by an embodiment of the present application. Referring to Figure 7 , the tensile force applying device 202 can include: a first force applying portion 2021, a second force applying portion 2022, and an elastic stretching member 2023. Among them, the first force applying portion 2021 is used to connect to the cover plate 2012 in the sliding and rolling module 20. The second force applying portion 2022 is disposed opposite to the first force applying portion 2021, and the second force applying portion 2022 is used to connect to the support member 2013 in the sliding and rolling module 20. The elastic stretching member 2023 is located between the first force applying portion 2021 and the second force applying portion 2022, and one end of the elastic stretching member 2023 is connected to the first force applying portion 2021, and the other end is connected to the second force applying portion 2022.

[0060] In the embodiment of the present application, the first force-applying part 2021 of the tensile force applying device 202 can apply a tensile force to the cover plate 2012, and the second force-applying part 2022 of the tensile force applying device 202 can apply a tensile force to the support member 2013. Thus, the cover plate 2012 and the support member 2013 of the sliding and rolling module 20 can jointly share the tensile force applied by the tensile force applying device 202, thereby avoiding the misalignment problem between the various film layers in the flexible display panel 2011 and the problem of cracks in the flexible display panel 2011 caused by the influence of shear force when the tensile force is applied to the support member 2013 alone or to the cover plate 2012 alone, ensuring the reliability of the flexible display panel 2011, and further ensuring the yield rate of the sliding and rolling display device.

[0061] Moreover, the elastic stretching member 2023 in the tensile force applying device 202 is used to connect the first force-applying part 2021 and the second force-applying part 2022, thereby enabling the first force-applying part 2021 and the second force-applying part 2022 to form an integral body, and further improving the uniformity of the tensile forces applied by the two force-applying parts when applying the tensile force, and ensuring the effect of the cover plate 2012 and the support member 2013 sharing the tensile force.

[0062] In summary, the embodiment of the present application provides a tensile force applying device for a sliding and rolling module. The first force-applying part of the tensile force applying device is used to connect with the cover plate of the display module in the sliding and rolling module, and the second force-applying part is used to connect with the support member of the display module in the sliding and rolling module, so that the cover plate and the support member jointly share the tensile force applied by the tensile force applying device. Thus, when the tensile force applying device bends and pulls one end of the display module to the non-display surface, it can avoid the misalignment of the various film layers in the flexible display panel of the display module and can avoid cracks in the flexible display panel, ensuring the reliability of the flexible display panel, and further improving the yield rate of the sliding and rolling display device.

[0063] Reference Figure 7 As shown in, the surface of the first force-applying part 2021 close to the second force-applying part 2022 has a first groove 2021a, and the surface of the second force-applying part 2022 close to the first force-applying part 2021 has a second groove 2022a. Among them, the positions of the first groove 2021a and the second groove 2022a are opposite. The elastic stretching member 2023 is located in the first groove 2021a and the second groove 2022a, and one end of the elastic stretching member 2023 is connected to the bottom surface of the first groove 2021a, and the other end is connected to the bottom surface of the second groove 2022a. That is to say, the elastic stretching member 2023 is located in the space formed by the first groove 2021a of the first force-applying part 2021 and the second groove 2022a of the second force-applying part 2022, so that the first force-applying part 2021 and the second force-applying part 2022 are oppositely arranged under the elastic action of the elastic stretching member 2023.

[0064] Optionally, the elastic tension member 2023 may be a spring. Alternatively, the elastic tension member 2023 may be other elastic objects, such as elastic sheets, etc. The embodiments of the present application do not limit the optional forms of the elastic tension member 2023.

[0065] In the embodiments of the present application, referring to Figure 3 and Figure 8 , when the first force-applying part 2021 of the pulling force applying device 202 applies a pulling force to the cover plate 2012 of the display module 201 and the second force-applying part 2022 of the pulling force applying device 202 applies a pulling force to the support member 2013 of the display module 201, the bending radius R2 of the support member 2013 is smaller than the bending radius R1 of the cover plate 2012, and there will be a certain dislocation between the first force-applying part 2021 and the second force-applying part 2022. Among them, Figure 3 is a schematic diagram of the unfolding of the display module 10, Figure 8 is a schematic diagram of the winding of the display module 10.

[0066] Therefore, in order to enable the first force-applying part 2021 and the second force-applying part 2022 to have a margin for relative movement, gaps may be provided between the elastic tension member 2023 and the first groove 2021a, and between the elastic tension member 2023 and the second groove 2022a. Further, the first force-applying part 2021 and the second force-applying part 2022 may move relatively within the range of this gap.

[0067] Exemplarily, the range of the gap may be from 1 millimeter to 3 millimeters.

[0068] In the embodiments of the present application, the display module 10 may be located between the first force-applying part 2021 and the second force-applying part 2022, that is, the cover plate 2012 and the support member 2013 are located between the first force-applying part 2021 and the second force-applying part 2022.

[0069] Among them, the first force-applying part 2021 includes a first positioning post 2021b on the surface close to the second force-applying part 2022. Referring to Figure 5 , the cover plate 2012 has a first positioning hole a1. Among them, referring to Figure 3 and Figure 8 , the first positioning post 2021b is located in the first positioning hole a1 to connect the first force-applying part 2021 and the cover plate 2012. The second force-applying part 2022 includes a second positioning post 2022b on the surface close to the first force-applying part 2021. Referring to Figure 6 , the support member 2013 has a second positioning hole a2. Among them, referring to Figure 3 and Figure 8 , the second positioning post 2022b is located in the second positioning hole a2 to connect the second force-applying part 2022 and the support member 2013.

[0070] In the embodiments of the present application, with reference to Figure 9 , when connecting the tensile force applying device 202 to the display module 10, the elastic stretching member 2023 can be first put in a stretched state, and the first positioning post 2021b of the first force applying portion 2021 can be snapped into the first positioning hole a1 of the cover plate 2012, and the second positioning post 2022b of the second force applying portion 2022 can be snapped into the second positioning hole a2 of the support member 2013. Then, the elastic stretching member 2023 returns to its original state under the action of its own elastic force, so that the surface of the first force applying portion 2021 close to the second force applying portion 2022 contacts the surface of the cover plate 2012 away from the flexible display panel 2011, and the surface of the second force applying portion 2022 close to the first force applying portion 2021 contacts the surface of the support member 2013 away from the flexible display panel 2011.

[0071] In the embodiments of the present application, the number of the first positioning posts 2021b included in the first force applying portion 2021 is equal to the number of the second positioning posts 2022b included in the second force applying portion 2022. Correspondingly, the number of the first positioning holes a1 in the cover plate 2012 is equal to the number of the second positioning holes a2 in the support member 2013. Thus, the connection between the first force applying portion 2021 and the cover plate 2012 can correspond to the connection between the second force applying portion 2022 and the support member 2013, thereby ensuring the consistency of the tensile force applied by the tensile force applying device 202 to the cover plate 2012 and the support member 2013, and ensuring the effect of the tensile force applied by the tensile force applying device 202 to the display module 10.

[0072] For example, with reference to Figure 5 and Figure 6 , the number of the first positioning holes a1 in the cover plate 2012 and the number of the second positioning holes a2 in the support member 2013 are both 5. Correspondingly, the number of the first positioning posts 2021b included in the first force applying portion 2021 and the number of the second positioning posts 2022b included in the second force applying portion 2022 are both 5.

[0073] In the embodiments of the present application, the number of the first positioning holes a1 in the cover plate 2012 and the number of the second positioning holes a2 in the support member 2013 can both be positively correlated with the length of the force applying end of the display module 10. For example, the force applying end of the display module 10 can extend along the pixel column direction Y of the display module 10, and the non-force applying end and the force applying end of the display module 10 are arranged along the pixel row direction X of the display module 10. That is to say, the number of the first positioning holes a1 and the number of the second positioning holes a2 are positively correlated with the length of the display module 10 along the pixel column direction Y. The longer the length of the display module 10 along the pixel column direction Y is, the more the number of the first positioning holes a1 and the number of the second positioning holes a2 are; the shorter the length of the display module 10 along the pixel column direction Y is, the fewer the number of the first positioning holes a1 and the number of the second positioning holes a2 are.

[0074] Correspondingly, the number of the first positioning posts 2021b included in the first force-applying portion 2021 and the number of the second positioning posts 2022b included in the second force-applying portion 2022 are both positively correlated with the length of the display module 10 in the pixel column direction Y.

[0075] Optionally, referring to Figure 10 , the length of the first force-applying portion 2021 in the pixel column direction Y may be equal to the length of the cover plate 2012 in the pixel column direction Y. Referring to Figure 11 , the length of the second force-applying portion 2022 in the pixel column direction Y is equal. The first positioning posts 2021b included in the first force-applying portion 2021 may correspond to the first positioning holes a1 in the cover plate 2012 one by one, and each first positioning post 2021b is located in a corresponding first positioning hole a1. The second positioning posts 2022b included in the second force-applying portion 2022 may correspond to the second positioning holes a2 in the support member 2012 one by one, and each second positioning post 2022b is located in a corresponding second positioning hole a2.

[0076] In the embodiment of the present application, referring to Figure 12 , the first force-applying portion 2021 may include a first step structure 2021c located between the first groove 2021a and the first positioning posts 2021b. The first step structure 2021c has a first surface b1, a second surface b2, and a third surface b3 located between the first surface b1 and the second surface b2. The first surface b1 and the second surface b2 are both parallel to the surface of the first force-applying portion 2021 away from the second force-applying portion 2022, the third surface b3 is perpendicular to the first surface b1, and the third surface b3 is used to contact the side surface of the cover plate 2012.

[0077] And, referring to Figure 13 , the second force-applying portion 2022 may include a second step structure 2022c located between the second groove 2022a and the second positioning posts 2022b. The second step structure 2022c has a fourth surface b4, a fifth surface b5, and a sixth surface b6 located between the fourth surface b4 and the fifth surface b5. The fourth surface b4 and the fifth surface b5 are both parallel to the surface of the second force-applying portion 2022 away from the first force-applying portion 2021, the sixth surface b6 is perpendicular to the fourth surface b4, and the sixth surface b6 is used to contact the side surface of the support member 2013.

[0078] That is to say, the first step structure 2021c of the first force application part 2021 can be used to clamp the side surface of the cover plate 2012, and the second step structure 2022c of the second force application part 2022 can be used to clamp the side surface of the support member 2013. Thus, when the cover plate 2012 and the support member 2013 move relative to each other, the cover plate 2012 and the first force application part 2021 move together, and the support member 2013 and the second force application part 2022 move together, thereby realizing the real-time limit of the cover plate 2012 and the support member 2013, and improving the reliability of the pulling force applied by the pulling force application device 202.

[0079] Optionally, in combination with Figure 5 and Figure 12 , the distance h1 between the third surface b3 of the first step structure 2021c and the axis of the first positioning column 2021b is equal to the distance h2 between the side surface of the cover plate 2012 clamped by the first step structure 2021c and the axis of the first positioning hole a1. Thus, when the first positioning column 2021b is located in the first positioning hole a1, the first step structure 2021c can accurately clamp the side surface of the cover plate 2012. And, in combination with Figure 6 and Figure 13 , the distance h3 between the sixth surface b6 of the second step structure 2022c and the axis of the second positioning column 2022b is equal to the distance h4 between the side surface of the support member 2013 clamped by the second step structure 2022c and the axis of the second positioning hole a2. Thus, when the second positioning column 2022b is located in the second positioning hole a2, the second step structure 2022c can accurately clamp the side surface of the support member 2013.

[0080] Referring to Figure 12 , the first positioning column 2021b is located on the first surface b1, and the first surface b1 is used to contact the surface of the cover plate 2012 away from the support member 2013. That is to say, after the first positioning column 2021b provided on the first surface b1 is inserted into the first positioning hole a1 of the cover plate 2012, the first surface b1 contacts the surface of the cover plate 2012 away from the support member 2013. Referring to Figure 13 , the second positioning column 2022b is located on the fourth surface b4, and the fourth surface b4 is used to contact the surface of the support member 2013 away from the cover plate 2012. That is to say, after the second positioning column 2022b provided on the fourth surface b4 is inserted into the second positioning hole a2 of the support member 2013, the fourth surface b4 contacts the surface of the support member 2013 away from the cover plate 2012.

[0081] In the embodiment of the present application, the setting surface M1 of the first groove 2021a and the second surface b2 may not be coplanar. For example, the distance d1 between the setting surface M1 of the first groove 2021a and the surface of the cover plate 2012 away from the support member 2013 is greater than the distance d2 between the second surface b2 and the surface of the cover plate 2012 away from the support member 2013. That is to say, the thickness at the setting position of the first groove 2021a in the first force application part 2021 can be relatively thick, so that the depth of the first groove 2021a can be relatively deep, ensuring the connection reliability between the elastic tension member 2023 and the first groove 2021a.

[0082] Correspondingly, the setting surface M2 of the second groove 2022a and the fifth surface b5 may not be coplanar. For example, the distance d3 between the setting surface of the second groove 2022a and the surface of the support member 2013 away from the cover plate 2012 is greater than the distance d4 between the fifth surface b5 and the surface of the support member 2013 away from the cover plate 2012. That is to say, the thickness at the setting position of the second groove 2022a in the second force application part 2022 can be relatively thick, so that the depth of the second groove 2022a can be relatively deep, ensuring the connection reliability between the elastic tension member 2023 and the second groove 2022a.

[0083] Optionally, the distance between the setting surface M1 of the first groove 2021a and the second surface b2 may be equal to the distance between the setting surface M2 of the second groove 2022a and the fifth surface b5. The depth of the first groove 2021a and the depth of the second groove 2022a may be equal, so that the length of the part of the elastic tension member 2023 located in the first groove 2021a is equal to the length of the part located in the second groove 2022a. This can ensure the structural symmetry of the tension application device 202 and the effect of the tension application device 202 applying tension to the display module.

[0084] Wherein, in the embodiment of the present application, for each of the first groove 2021a and the second groove 2022a, the setting surface of the groove may refer to the surface where the opening of the groove is located.

[0085] In summary, the embodiment of the present application provides a tension application device for a sliding and rolling module. The first force application part of the tension application device is used to connect with the cover plate of the display module in the sliding and rolling module, and the second force application part is used to connect with the support member of the display module in the sliding and rolling module, so that the cover plate and the support member jointly share the tension applied by the tension application device. Thus, when the tension application device bends and pulls one end of the display module to the non-display surface, it can avoid the dislocation of each film layer in the flexible display panel of the display module and avoid the generation of cracks in the flexible display panel, ensuring the reliability of the flexible display panel and thereby improving the yield of the sliding and rolling display device.

[0086] An embodiment of the present application further provides a scroll display device, which may include a power supply component and the scroll module 20 provided in the above embodiment. The power supply component can be used to supply power to the scroll module 20.

[0087] Optionally, the scroll display device may be an OLED scroll display device.

[0088] Since the scroll display device can have substantially the same technical effects as the tension application device described in the previous embodiments, for the sake of brevity, the technical effects of the scroll display device will not be described again here.

[0089] It will be understood that although terms such as first and second may be used herein to describe various elements, components, regions, layers, and / or portions, these elements, components, regions, layers, and / or portions should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer, or portion from another region, layer, or portion. Thus, the first element, component, region, layer, or portion discussed above may be referred to as a second element, component, region, layer, or portion without departing from the teachings of the present disclosure.

[0090] Spatial relative terms such as "beneath", "above", "left", "right", etc. may be used herein for convenience of description to describe the relationship of one element or feature to another (other) element or feature as illustrated in the figures. It will be understood that these spatial relative terms are intended to cover different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "beneath other elements or features" will be oriented "above other elements or features". Thus, the exemplary term "beneath" can cover both the orientation of above and beneath. The device may be oriented in other ways (rotated 90 degrees or in other orientations) and the spatial relative descriptors used herein will be interpreted accordingly. Additionally, it will also be understood that when a layer is referred to as "between two layers", it may be the only layer between the two layers, or there may also be one or more intermediate layers.

[0091] The terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising", when used in this specification, specify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. In this specification, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, in the case of no conflict, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples.

[0092] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the relevant art and / or the context of this specification, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0093] The foregoing are only alternative embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A tensile force application device, characterized in that, The tensile force applying device includes: A first force applying part (2021) for connecting with a cover plate (2012) in a sliding coil module (20); A second force applying part (2022) which is oppositely arranged with the first force applying part (2021) and is used for connecting with a support member (2013) in the sliding coil module (20); And an elastic stretching member (2023) which is located between the first force applying part (2021) and the second force applying part (2022), and one end of the elastic stretching member (2023) is connected with the first force applying part (2021), and the other end is connected with the second force applying part (2022); A first groove (2021a) is formed on the surface of the first force applying part (2021) close to the second force applying part (2022), and a second groove (2022a) is formed on the surface of the second force applying part (2022) close to the first force applying part (2021), and the positions of the first groove (2021a) and the second groove (2022a) are opposite; The elastic stretching member (2023) is located in the first groove (2021a) and the second groove (2022a), and one end of the elastic stretching member (2023) is connected with the bottom surface of the first groove (2021a), and the other end is connected with the bottom surface of the second groove (2022a).

2. The pulling force applying device according to claim 1, characterized in that, There are gaps between the elastic stretching member (2023) and the first groove (2021a), and between the elastic stretching member (2023) and the second groove (2022a).

3. The pulling force applying device according to claim 1, wherein, The cover plate (2012) and the support member (2013) are located between the first force applying part (2021) and the second force applying part (2022); The first force applying part (2021) includes a first positioning post (2021b) on the surface close to the second force applying part (2022), and the cover plate (2012) has a first positioning hole (a1), and the first positioning post (2021b) is located in the first positioning hole (a1) to connect the first force applying part (2021) and the cover plate (2012); The second force applying part (2022) includes a second positioning post (2022b) on the surface close to the first force applying part (2021), and the support member (2013) has a second positioning hole (a2), and the second positioning post (2022b) is located in the second positioning hole (a2) to connect the second force applying part (2022) and the support member (2013).

4. The pulling force applying device according to claim 3, characterized in that The first force-applying part (2021) includes a first stepped structure (2021c) located between a first groove (2021a) and a first positioning post (2021b). The first stepped structure (2021c) has a first surface (b1), a second surface (b2), and a third surface (b3) located between the first surface (b1) and the second surface (b2). Both the first surface (b1) and the second surface (b2) are parallel to the surface of the first force-applying part (2021) away from the second force-applying part (2022). The third surface (b3) is perpendicular to the first surface (b1), and the third surface (b3) is used to contact the side surface of the cover plate (2012). The second force-applying part (2022) includes a second stepped structure (2022c) located between a second groove (2022a) and a second positioning post (2022b). The second stepped structure (2022c) has a fourth surface (b4), a fifth surface (b5), and a sixth surface (b6) located between the fourth surface (b4) and the fifth surface (b5). Both the fourth surface (b4) and the fifth surface (b5) are parallel to the surface of the second force-applying part (2022) away from the first force-applying part (2021). The sixth surface (b6) is perpendicular to the fourth surface (b4), and the sixth surface (b6) is used to contact the side surface of the support member (2013).

5. The pulling force applying device according to claim 4, characterized in that, The first positioning post (2021b) is located on the first surface (b1), and the first surface (b1) is used to contact the surface of the cover plate (2012) away from the support member (2013). The second positioning post (2022b) is located on the fourth surface (b4), and the fourth surface (b4) is used to contact the surface of the support member (2013) away from the cover plate (2012).

6. The pulling force applying device according to claim 3, wherein The number of the first positioning posts (2021b) included in the first force-applying part (2021) is equal to the number of the second positioning posts (2022b) included in the second force-applying part (2022).

7. A sliding and coiling module, characterized in that, The scroll module (20) includes a display module and the tension applying device according to any one of claims 1 to 6; the display module includes: A flexible display panel (2011), the flexible display panel (2011) having a display surface (2011a) and a non-display surface (2011b); A cover plate (2012), the cover plate (2012) being located on the display surface (2011a) of the flexible display panel (2011); And a support member (2013), the support member (2013) being located on the non-display surface (2011b) of the flexible display panel (2011). Among them, the first force-applying part (2021) of the tensile force applying device is connected to the cover plate (2012), and the second force-applying part (2022) of the tensile force applying device is connected to the support member (2013). The tensile force applying device is used to apply a tensile force to the cover plate (2012) and the support member (2013) so as to bend at least part of the flexible display panel (2011), the cover plate (2012), and the support member (2013) to the non-display surface (2011b).

8. The sliding and coiling module according to claim 7, wherein The cover plate (2012) includes a first part (20121) and a second part (20122). The orthographic projection of the first part (20121) on the flexible display panel (2011) overlaps with the flexible display panel (2011), and the orthographic projection of the second part (20122) on the flexible display panel (2011) does not overlap with the flexible display panel (2011). The second part (20122) has a first positioning hole (a1); The support member (2013) includes a third part (20131) and a fourth part (20132). The orthographic projection of the third part (20131) on the flexible display panel (2011) overlaps with the flexible display panel (2011), and the orthographic projection of the fourth part (20132) on the flexible display panel (2011) does not overlap with the flexible display panel (2011). The fourth part (20132) has a second positioning hole (a2).

9. A sliding and rolling display device, characterized in that, The rollable display device includes: a power supply component and the rollable module (20) as claimed in claim 7 or 8; The power supply component is used to supply power to the rollable module (20).

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