Display modules and display devices

Abstract

This application relates to a display module and a display device. The display module includes: a rotating shaft with a curved surface and a cross-section on its outer periphery. The radius of the curved surface gradually increases in the circumferential direction of the rotating shaft. The cross-section connects the beginning and end of the curved surface. A flexible display panel includes a cover plate, a flexible screen body, and a functional layer. The cover plate has a first region and a second region arranged along a first direction. The flexible screen body is disposed on one side of the cover plate and located in the first region. The functional layer is disposed on the side of the cover plate near the flexible screen body and located in the second region. The functional layer is wound around the outer periphery of the curved surface in the circumferential direction of the rotating shaft. The flexible display panel has a curled state. In the curled state, the flexible screen body is wound around the outer periphery of the second region of the cover plate in the circumferential direction of the rotating shaft. In summary, in this embodiment, by fixing the second region of the cover plate to the curved surface and pressing the flexible screen body with the first region of the cover plate, the reverse warping of the flexible screen body can be limited, reducing the risk of peeling of the various film layers in the flexible screen body.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display module and display device. Background Technology

[0002] With the continuous upgrading of display technology, consumers' demands for display panels are becoming more diversified and personalized. Flexible displays, with their bendability, flexibility, and excellent adaptability, have attracted much attention. Among them, rollable displays, as one of the development trends of flexible display technology, not only meet consumers' pursuit of large screens and wide viewing angles, but also have a smaller size and are easy to carry.

[0003] In related technologies, after the flexible display panel is encapsulated, the mechanical properties of the other film layers it is bonded to differ. During repeated rolling, bending, or flattening of the flexible display module, each film layer must withstand certain stresses. After bending or rolling, peeling is prone to occur at the joints of the film layers, increasing the risk of product failure and affecting the reliability of the flexible display panel. Summary of the Invention

[0004] Therefore, it is necessary to propose a display module and display device to address the problem that peeling easily occurs at the joints of various film layers when flexible display modules are bent or rolled.

[0005] A display module, comprising:

[0006] A rotating shaft, the outer periphery of which includes a curved surface and a cross-section, wherein the radius of the curved surface gradually increases in the circumferential direction of the rotating shaft, and the cross-section connects the beginning and end of the curved surface;

[0007] A flexible display panel includes a cover plate, a flexible screen body, and a functional layer. The cover plate has a first region and a second region arranged along a first direction. The flexible screen body is disposed on one side of the cover plate and located in the first region. The functional layer is disposed on the side of the cover plate close to the flexible screen body and located in the second region. The functional layer is wound around at least a portion of the outer periphery of the curved surface along the circumferential direction of the rotation axis.

[0008] The flexible display panel has a rolled-up state, in which the flexible screen body is at least partially rolled around the outer periphery of the second region of the cover plate along the circumferential direction of the rotation axis.

[0009] In one embodiment, the cross-section is radially parallel to the maximum radius of the curved surface;

[0010] Optionally, the flexible display panel includes a support film layer, which is disposed on the side of the flexible screen body away from the cover plate;

[0011] Optionally, in the curled state, the support film layer is wound around at least a portion of the outer periphery of the second region of the cover plate;

[0012] Optionally, the flexible display panel includes a protective film layer, which is disposed on the side of the supporting film layer opposite to the flexible screen body;

[0013] Optionally, in the curled state, the protective film layer is wound around at least a portion of the outer periphery of the second region of the cover plate.

[0014] In one embodiment, the functional layer includes a first adhesive layer, which is spaced apart from the flexible screen body along the first direction;

[0015] Optionally, the first adhesive layer is arranged at intervals with the cross section on the side close to the flexible screen along the first direction, and the first adhesive layer is arranged on the side away from the flexible screen along the first direction, and is wound around the curved surface along the direction of gradually decreasing radius of the curved surface.

[0016] Optionally, the distance between the first adhesive layer and the side of the flexible screen body that is close to the first adhesive layer along the first direction and the cross section in the direction in which the radius of the curved surface gradually decreases is a first value, and the distance between the first adhesive layer and the flexible screen body in the first direction is a second value, wherein the first value is less than or equal to the second value;

[0017] Optionally, when the first value is equal to the second value, in the curled state, the flexible screen body is in contact with the cross-section on the side close to the first adhesive layer along the first direction, and the flexible screen body is on the side away from the first adhesive layer along the first direction, and is rolled around at least part of the outer periphery of the second region of the cover plate along the direction in which the radius of the curved surface gradually increases.

[0018] Optionally, when the first value is less than the second value, in the curled state, the flexible screen body is arranged at intervals with the side of the cross-section that is close to the first adhesive layer along the first direction and the cross-section is arranged at intervals along the direction of gradually increasing radius of the curved surface. The flexible screen body is rolled around at least part of the outer periphery of the second region of the cover plate along the first direction away from the first adhesive layer and along the direction of gradually increasing radius of the curved surface.

[0019] Optionally, the first adhesive layer is flush with one side of the cover plate in the first direction, away from the flexible screen body, and the flexible screen body is flush with the other side of the cover plate in the first direction, away from the first adhesive layer.

[0020] In one embodiment, along the first direction, the supporting film layer extends out of the flexible screen body from the side near the first adhesive layer, and the extension length is a third value, the third value being less than the second value, and the first value being equal to the third value;

[0021] The protective film layer is flush with the side of the supporting film layer that is close to the first adhesive layer along the first direction;

[0022] Optionally, in the curled state, the protective film layer is in contact with the cross-section on the side close to the first adhesive layer along the first direction; the protective film layer is wound around at least a portion of the outer periphery of the second region of the cover plate in the direction in which the radius of the curved surface gradually increases, on the side away from the first adhesive layer along the first direction.

[0023] The supporting film layer is in contact with the cross-section on the side close to the first adhesive layer along the first direction; along the first direction, the supporting film layer is wound around the outer periphery of the protective film layer on the side opposite to the first adhesive layer in the direction in which the radius of the curved surface gradually increases.

[0024] The flexible screen body, on the side away from the first adhesive layer, is wound around the outer periphery of the supporting film layer in a direction that gradually increases in radius along the curved surface.

[0025] In one embodiment, the second region of the cover plate has a fourth value in the first direction. The fourth value is less than or equal to the sum of the circumferential dimension of the curved surface on the axis of rotation and a fifth value. The fifth value is equal to the product of the dimension of the first adhesive layer in the second direction and 2pi, where pi represents pi. The second direction intersects with the first direction.

[0026] Optionally, the fourth value is equal to the sum of the dimension of the surface in the circumferential direction of the axis of rotation and the fifth value;

[0027] Optionally, in the curled state, the first adhesive layer is in contact with the cross-section on the side opposite to the flexible screen body along the first direction; the protective film layer is wound around the outer periphery of the second region of the cover plate in the direction where the radius of the curved surface gradually increases, on the side opposite to the first adhesive layer along the first direction.

[0028] In one embodiment, the fourth value is between 1 / 8 and 3 / 4 of the sum of the circumferential dimension of the surface on the axis of rotation and the fifth value;

[0029] Optionally, along the first direction, the first adhesive layer is separated from the flexible screen body on one side, and a gap is provided between the first adhesive layer and the cross-section.

[0030] Optionally, in the curled state, along the direction in which the radius of the curved surface gradually increases, the protective film layer is sequentially rolled from the cross-section around the outer periphery of the curved surface located between the first adhesive layer and the cross-section, and around the outer periphery of the second region of the cover plate.

[0031] In one embodiment, the flexible display panel includes a second adhesive layer disposed on the side of the protective film layer away from the supporting film layer. The dimension of the second adhesive layer in the first direction is less than or equal to the dimension of the gap between the first adhesive layer and the cross-section along the first direction on the side of the flexible screen away from the flexible screen body, in the direction in which the radius of the curved surface gradually decreases.

[0032] The dimension of the protective film layer in the first direction is greater than the dimension of the second adhesive layer in the first direction;

[0033] Optionally, in the curled state, along the direction in which the radius of the curved surface gradually increases, the second adhesive layer is wound around the outer periphery of the curved surface located between the first adhesive layer and the cross-section; the protective film layer is sequentially wound around the outer periphery of the second adhesive layer and the outer periphery of the second region of the cover plate.

[0034] In one embodiment, the distance between the side of the second adhesive layer away from the cover plate and the side of the cover plate away from the second adhesive layer is a sixth value. In the direction in which the radius of the curved surface gradually increases, the difference between the maximum radius of the curved surface and the minimum radius of the curved surface is a seventh value. The difference between the sixth value and the seventh value is between -20um and 20um.

[0035] Optionally, the thickness of the second adhesive layer is between 30µm and 200µm;

[0036] Optionally, the distance between the side of the first adhesive layer away from the cover plate and the side of the cover plate away from the second adhesive layer is an eighth value, and the eighth value is equal to the thickness of the second adhesive layer.

[0037] In one embodiment, the functional layer includes a support layer located on one side of the flexible screen in the first direction and in contact with the flexible screen. The support layer is bonded to the side of the cover plate near the flexible screen. The side of the support layer opposite to the second region of the cover plate is flush with the side of the flexible screen opposite to the first region of the cover plate.

[0038] The support layer is flush with the cover plate on one side of the flexible screen body along the first direction, away from the support layer. The flexible screen body is flush with the cover plate on the other side of the first direction, away from the support layer.

[0039] Optionally, in the direction where the radius of the curved surface gradually increases, the support layer is wound around the outer periphery of the rotating shaft from the cross-section;

[0040] Optionally, the outer periphery of the rotating shaft is wound with at least one turn of the support layer;

[0041] Optionally, the opposite sides of the support membrane layer in the first direction are flush with the opposite sides of the cover plate in the first direction;

[0042] Optionally, the protective film layer on opposite sides in the first direction is flush with the cover plate on opposite sides in the first direction.

[0043] In this embodiment, the display module has a functional layer wound around at least a portion of the outer periphery of a curved surface along the circumferential direction of the rotation axis. A second region of the cover plate is also wound around the outer periphery of the functional layer along the circumferential direction of the rotation axis. The second region of the cover plate, located on the outer periphery of the functional layer, is fixed to the curved surface on the outer periphery of the rotation axis via the functional layer. The flexible display panel has a rolled-up state. In this rolled-up state, the flexible screen body is at least partially wound around the outer periphery of the second region of the cover plate along the circumferential direction of the rotation axis. A first region of the cover plate is also wound around the outer periphery of the flexible screen body along the circumferential direction of the rotation axis. Since the first and second regions of the cover plate belong to two parts of the same cover plate, the first region of the cover plate wound around the outer periphery of the flexible screen body is always taut. The first region of the cover plate applies a radial force pointing towards the center of the rotation axis to the flexible screen body, thereby pressing the flexible screen body, limiting its reverse warping, and reducing the risk of peeling of the various film layers in the flexible screen body.

[0044] In summary, the display module in this embodiment fixes the second region of the cover plate to the curved surface of the outer periphery of the rotating shaft, so that the first region of the cover plate wrapped around the outer periphery of the flexible screen body is always tightened. This allows the first region of the cover plate to press the flexible screen body, restricting the reverse warping of the flexible screen body and reducing the risk of peeling of the various film layers in the flexible screen body.

[0045] This application also proposes a display device comprising the display module described in any of the foregoing claims.

[0046] In this embodiment, the display device has a functional layer wound around at least a portion of the outer periphery of a curved surface along the circumferential direction of the rotation axis. A second region of the cover plate is also wound around the outer periphery of the functional layer along the circumferential direction of the rotation axis. The second region of the cover plate, located on the outer periphery of the functional layer, is fixed to the curved surface of the outer periphery of the rotation axis via the functional layer. The flexible display panel has a rolled-up state. In this rolled-up state, the flexible screen body is at least partially wound around the outer periphery of the second region of the cover plate along the circumferential direction of the rotation axis. A first region of the cover plate is wound around the outer periphery of the flexible screen body along the circumferential direction of the rotation axis. Since the first and second regions of the cover plate belong to two parts of the same cover plate, the first region of the cover plate wound around the outer periphery of the flexible screen body is always taut. The first region of the cover plate applies a radial force pointing towards the center of the rotation axis to the flexible screen body to press it down, restricting reverse warping of the flexible screen body and thus reducing the risk of peeling of the various film layers in the flexible screen body.

[0047] In summary, the display device in this embodiment fixes the second region of the cover plate to the curved surface of the outer periphery of the rotating shaft, so that the first region of the cover plate wrapped around the outer periphery of the flexible screen body is always tightened, thereby pressing the flexible screen body with the first region of the cover plate, limiting the reverse warping of the flexible screen body, and reducing the risk of peeling of the various film layers in the flexible screen body. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments or exemplary embodiments of this application, the drawings used in the description of the embodiments or exemplary embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 This is a schematic diagram of the structure of the display module in one embodiment of this application.

[0050] Figure 2 for Figure 1 The diagram shows the structure of the flexible display panel wound around the pivot in the display module.

[0051] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0052] Figure 4 for Figure 1 The diagram shows the structure of the display module after the functional layers are completely wrapped around the curved surface.

[0053] Figure 5 for Figure 1 The diagram shows the structure of the flexible display panel in the display module, which is wound around the pivot.

[0054] Figure 6 for Figure 1 The diagram shows the structure of the flexible display panel in the display module.

[0055] Figure label:

[0056] Display module 10;

[0057] Shaft 100, curved surface 110, cross section 120;

[0058] Flexible display panel 200, cover plate 210, first area 211, second area 212, flexible screen body 220, functional layer 230, first adhesive layer 231, support layer 232, support film layer 240, protective film layer 250, second adhesive layer 260. Detailed Implementation

[0059] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0060] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0061] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0062] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0063] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0064] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0065] Please see Figures 1 to 3 , Figure 1A schematic diagram of the structure of a display module according to an embodiment of this application is shown. An embodiment of this application provides a display module 10, including: a pivot 100 and a flexible display panel 200. The outer periphery of the pivot 100 includes a curved surface 110 and a cross-section 120. Along the circumferential direction of the pivot 100, the radius of the curved surface 110 gradually increases. The cross-section 120 connects the first and second ends of the curved surface 110. The flexible display panel 200 includes a cover plate 210, a flexible screen 220, and a functional layer 230. The cover plate 210 has a first region 211 and a second region arranged along a first direction. In region 212, the flexible screen 220 is disposed on one side of the cover plate 210 and located in the first region 211. The functional layer 230 is disposed on the side of the cover plate 210 near the flexible screen 220 and located in the second region 212. The functional layer 230 is wound around at least a portion of the outer periphery of the curved surface 110 along the circumferential direction of the pivot 100. The flexible display panel 200 has a rolled state. In the rolled state, the flexible screen 220 is wound around at least a portion of the outer periphery of the second region 212 of the cover plate 210 along the circumferential direction of the pivot 100.

[0066] In this embodiment, the display module 10 has a functional layer 230 that is wound around at least a portion of the outer periphery of the curved surface 110 along the circumferential direction of the pivot 100. The second region 212 of the cover plate 210 is wound around the outer periphery of the functional layer 230 along the circumferential direction of the pivot 100. The second region 212 of the cover plate 210 located on the outer periphery of the functional layer 230 is fixed to the curved surface 110 on the outer periphery of the pivot 100 via the functional layer 230. The flexible display panel 200 has a rolled-up state. In the rolled-up state, the flexible screen body 220 is at least partially rolled around the outer periphery of the second region 212 of the cover plate 210 along the circumferential direction of the pivot 100. The first region 211 of the cover plate 210 is rolled around the outer periphery of the flexible screen body 220 along the circumferential direction of the pivot 100. Since the first region 211 and the second region 212 of the cover plate 210 are two parts of the same cover plate 210, the first region 211 of the cover plate 210 rolled around the outer periphery of the flexible screen body 220 is always taut. The first region 211 of the cover plate 210 applies a radial force toward the center of the pivot to the flexible screen body 220 to press the flexible screen body 220, restrict the reverse warping of the flexible screen body 220, and thereby reduce the risk of peeling of the various film layers in the flexible screen body 220.

[0067] In summary, the display module 10 in this embodiment fixes the second region 212 of the cover plate 210 onto the curved surface 110 on the outer periphery of the rotating shaft 100, so that the first region 211 of the cover plate 210 wrapped around the outer periphery of the flexible screen body 220 is always tightened. This allows the first region 211 of the cover plate 210 to press the flexible screen body 220, restricting the reverse warping of the flexible screen body 220 and reducing the risk of peeling of the various film layers in the flexible screen body 220.

[0068] It should be noted that, since this embodiment solves the problem of reverse warping of the flexible screen 220 by using an outer cover plate 210 and setting a functional layer 230 on the second region 212 of the cover plate 210, the size of the existing flexible screen 220 is not adjusted throughout the process, so the layout rate of the flexible screen 220 during processing will not be affected.

[0069] Please see Figure 2 and Figure 3 In some embodiments, the cross section 120 is radially parallel to the maximum radius of the curved surface 110.

[0070] In this embodiment, by making the cross section 120 radially parallel to the maximum radius position of the curved surface 110, the length of the flexible screen 220 wrapped around the outer periphery of the second region 212 of the cover plate 210 along the circumference of the rotation axis 100 can be increased.

[0071] In some embodiments, the flexible display panel 200 includes a support film layer 240, which is disposed on the side of the flexible screen body 220 away from the cover plate 210.

[0072] In this embodiment, the support film layer 240 is disposed on the side of the flexible screen body 220 away from the cover plate 210, so that the flexible display panel 200 in the rolled state, along the circumferential direction of the pivot 100, the support film layer 240 is rolled around at least part of the outer periphery of the second region 212 of the cover plate 210, and the flexible screen body 220 is rolled around the outer periphery of the support film layer 240, thereby supporting the flexible screen body 220 by means of the support film layer 240 and preventing the flexible screen body 220 from being damaged when rolled.

[0073] In some embodiments, in a rolled-up state, the support film layer 240 is wound around at least a portion of the outer periphery of the second region 212 of the cover plate 210.

[0074] In some embodiments, the flexible display panel 200 includes a protective film layer 250, which is disposed on the side of the support film layer 240 opposite to the flexible screen body 220.

[0075] In this embodiment, the protective film layer 250 is disposed on the side of the support film layer 240 away from the flexible screen body 220, so that when the flexible display panel 200 is rolled up, the protective film layer 250 is rolled around at least part of the outer periphery of the second region 212 of the cover plate 210 along the circumference of the pivot 100, and the support film layer 240 is rolled around the outer periphery of the protective film layer 250. This facilitates the isolation of the support film layer 240 from the cover plate 210 by the protective film layer 250, protects the cover plate 210, prevents the support film layer 240 from scratching the cover plate 210, and avoids light leakage from the flexible screen body 220.

[0076] In some embodiments, in a curled state, the protective film layer 250 is wound around at least a portion of the outer periphery of the second region 212 of the cover plate 210.

[0077] Please see Figures 2 to 3 In some embodiments, the functional layer 230 includes a first adhesive layer 231, which is arranged at intervals with the flexible screen body 220 along a first direction.

[0078] In this embodiment, by providing the functional layer 230 including the first adhesive layer 231, the second region 212 of the cover plate 210 can be bonded to the curved surface 110 by means of the first adhesive layer 231, thereby improving the firmness of the connection between the second region 212 of the cover plate 210 and the curved surface 110.

[0079] In some embodiments, the first adhesive layer 231 is arranged at intervals with the cross section 120 along the first direction close to the side of the flexible screen 220, and the first adhesive layer 231 is arranged at intervals with the side of the cross section 120 along the direction in which the radius of the curved surface 110 gradually decreases. The first adhesive layer 231 is arranged along the first direction away from the side of the flexible screen 220, and is wound around the curved surface 110 along the direction in which the radius of the curved surface 110 gradually decreases.

[0080] In this embodiment, by setting the side of the first adhesive layer 231 close to the flexible screen 220 along the first direction and the section 120 arranged at intervals along the direction of the gradually decreasing radius of the curved surface 110, the side of the first adhesive layer 231 close to the flexible screen 220 along the first direction and the section 120 are offset along the direction of the gradually decreasing radius of the curved surface 110. This allows the projection on the curved surface 110 to form a receiving groove (not marked) between the cover plate 210 between the side of the first adhesive layer 231 close to the flexible screen 220 along the first direction and the section 120, and the curved surface 110. This facilitates the flexible display panel 200 in the rolled state, where the side of the flexible screen 220 close to the first adhesive layer 231 along the first direction is misaligned in the circumferential direction of the pivot 100, to be accommodated in the receiving groove. This prevents the side of the flexible screen 220 close to the first adhesive layer 231 along the first direction from interfering with the section 120 and the second adhesive layer 260.

[0081] In some embodiments, the distance between the first adhesive layer 231 and the side of the flexible screen 220 along the first direction and the section 120 in the direction where the radius of the curved surface 110 gradually decreases is a first value D1, and the spacing between the first adhesive layer 231 and the flexible screen 220 in the first direction is a second value D2, wherein the first value D1 is less than or equal to the second value D2.

[0082] In this embodiment, by setting the first adhesive layer 231 to be close to the flexible screen 220 along the first direction, and the distance between the cross-section 120 and the side of the curved surface 110 that is close to the first adhesive layer 231 along the first direction, and the distance between the cross-section 120 and the side of the flexible screen 220 that is close to the first adhesive layer 231 along the first direction, and the distance between the cross-section 120 and the side of the flexible screen 220 that is close to the first adhesive layer 231 along the first direction, and the distance between the cross-section 120 and the side of the flexible screen 220 that is close to the first adhesive layer 231 along the first direction, and the distance between the cross-section 120 and the side of the flexible screen 220 that is close to the first adhesive layer 231 along the first direction, and the distance between the cross-section 120 and the side of the curved surface 110 that is close to the first adhesive layer 231, and the distance between the cross-section 120 and the side of the curved surface 110 that is close to the first adhesive layer 231 along the first direction ...

[0083] In some embodiments, when the first value D1 is equal to the second value D2, in the curled state, the flexible screen 220 contacts the cross section 120 on the side of the first adhesive layer 231 along the first direction, and the flexible screen 220 is away from the first adhesive layer 231 along the first direction, and is rolled around at least part of the outer periphery of the second region 212 of the cover plate 210 along the direction in which the radius of the curved surface 110 gradually increases.

[0084] In some embodiments, when the first value D1 is less than the second value D2, in the curled state, the flexible screen 220 is arranged at intervals with the cross-section 120 along the first direction close to the first adhesive layer 231, and the flexible screen 220 is arranged at intervals along the direction of the radius of the curved surface 110 gradually increasing. The flexible screen 220 is arranged along the first direction away from the first adhesive layer 231, and is rolled around at least part of the outer periphery of the second region 212 of the cover plate 210 along the direction of the radius of the curved surface 110 gradually increasing.

[0085] In this embodiment, by setting the flexible screen 220 along the first direction close to the first adhesive layer 231 and the cross-section 120 to be arranged at intervals along the direction of gradually increasing radius of curved surface 110, the gap between the flexible screen 220 along the first direction close to the first adhesive layer 231 and the cross-section 120 can be used to accommodate the flexible screen 220 after it is misaligned in the circumferential direction of the rotating shaft 100, and prevent the flexible screen 220 along the first direction close to the first adhesive layer 231 from interfering with the cross-section 120.

[0086] In some embodiments, the first adhesive layer 231 is opposite to the side of the flexible screen body 220 along the first direction and is flush with one side of the cover plate 210 in the first direction, while the flexible screen body 220 is opposite to the side of the first adhesive layer 231 along the first direction and is flush with the other side of the cover plate 210 in the first direction.

[0087] Please see Figures 2 to 3 In some embodiments, along the first direction, the support film layer 240 extends out of the flexible screen body 220 on the side near the first adhesive layer 231, and the extension length is a third value D3, the third value D3 is less than the second value D2, the first value D1 is equal to the third value D3, and the protective film layer 250 is flush with the side of the support film layer 240 near the first adhesive layer 231 along the first direction.

[0088] In this embodiment, by setting the flexible screen body 220 to extend from the side of the support film layer 240 near the first adhesive layer 231 along the first direction, and the extension length being a third value D3, which is less than the second value D2, it is convenient that when the flexible display panel 200 is rolled up, the side of the protective film layer 250 near the first adhesive layer 231 along the first direction contacts the cross-section 120, and the side of the support film layer 240 near the first adhesive layer 231 along the first direction contacts the cross-section 120. This allows the flexible screen body 220, which is rolled around the outer periphery of the support film layer 240, to be positioned with the cross-section 120 along the side of the first adhesive layer 231 along the first direction. This ensures that the cross-section 120 and the flexible screen body 220 are arranged alternately along the direction of gradually increasing radius of the curved surface 110.

[0089] In some embodiments, in the curled state, the protective film layer 250 is in contact with the cross-section 120 on the side of the first adhesive layer 231 along the first direction, and the protective film layer 250 is in contact with the cross-section 120 on the side of the first adhesive layer 231 away from the first adhesive layer 231 along the first direction, and is wound around the outer periphery of at least a portion of the second region 212 of the cover plate 210 in a direction in which the radius of the curved surface 110 gradually increases. The support film layer 240 is in contact with the cross-section 120 on the side of the first adhesive layer 231 along the first direction, and the support film layer 240 is in contact with the cross-section 120 on the side of the first adhesive layer 231 away from the first adhesive layer 231 along the first direction, and is wound around the outer periphery of the protective film layer 250 in a direction in which the radius of the curved surface 110 gradually increases. The flexible screen body 220 is wound around the outer periphery of the support film layer 240 on the side of the flexible screen body away from the first adhesive layer 231 along the direction in which the radius of the curved surface 110 gradually increases.

[0090] In this embodiment, since the distance in the first direction between the side of the support film layer 240 that is close to the first adhesive layer 231 and the side of the first adhesive layer 231 that is close to the flexible screen body 220 is less than the distance in the first direction between the first adhesive layer 231 and the flexible screen body 220, when the protective film layer 250 is in contact with the cross-section 120 and the side of the support film layer 240 that is in contact with the cross-section 120, the flexible screen body 220 wrapped around the outer periphery of the support film layer 240 is arranged at intervals along the circumference of the axis of rotation 100 with the side of the first adhesive layer 231 that is close to the first adhesive layer 231 in the first direction.

[0091] In some embodiments, the third value D3 is between 100um and 500um.

[0092] In some embodiments, the support film layer 240 is located on the side of the first adhesive layer 231 along the first direction, and the flexible screen body 220 is located on the side of the first adhesive layer 231 along the first direction. The distance between them along the first direction is D13, where D13 is between 200um and 500um.

[0093] Please see Figures 1 to 4 In some embodiments, the second region 212 of the cover plate 210 has a fourth value D4 in the first direction. The fourth value D4 is less than or equal to the sum of the circumferential dimension of the curved surface 110 on the axis of rotation 100 and a fifth value. The fifth value is equal to the product of the dimension D5 of the first adhesive layer 231 in the second direction and 2pi, where pi represents pi. The second direction is intersecting the first direction.

[0094] In this embodiment, by setting the size of the second region 212 of the cover plate 210 in the first direction to a fourth value D4, the fourth value D4 is less than or equal to the sum of the size of the curved surface 110 in the circumferential direction of the rotation axis 100 and a fifth value, the length of the first adhesive layer 231 wound on the curved surface 110 in the direction where the radius of the curved surface 110 gradually decreases can be increased.

[0095] Please see Figure 4 In some embodiments, the fourth value D4 is equal to the sum of the dimension of the surface 110 in the circumferential direction of the axis of rotation 100 and the fifth value.

[0096] In this embodiment, by setting the fourth value D4 to be equal to the sum of the dimension of the curved surface 110 in the circumferential direction of the rotation axis 100 and the fifth value, the first adhesive layer 231 can contact the cross-section 120 after being wound around the curved surface 110 along the first direction away from the flexible screen body 220 and along the direction in which the radius of the curved surface 110 gradually decreases.

[0097] In some embodiments, in the curled state, the first adhesive layer 231 is away from the side of the flexible screen 220 along the first direction and contacts the cross-section 120, and the protective film layer 250 is away from the side of the first adhesive layer 231 along the first direction and is wound around the outer periphery of the second region 212 of the cover plate 210 in the direction where the radius of the curved surface 110 gradually increases.

[0098] In this embodiment, the protective film layer 250 is close to the first adhesive layer 231 along the first direction and contacts the cross section 120. The protective film layer 250 is away from the first adhesive layer 231 along the first direction and is wrapped around the outer periphery of the second region 212 of the cover plate 210 in the direction where the radius of the curved surface 110 gradually increases.

[0099] In some embodiments, the thickness D14 of the cover plate 210 is between 15µm and 60µm.

[0100] In some embodiments, the elongation at break of the cover plate 210 is greater than 5%.

[0101] Please see Figures 1 to 3 In some embodiments, the fourth value D4 is between 1 / 8 and 3 / 4 of the sum of the dimension of the surface 110 in the circumferential direction of the axis of rotation 100 and the fifth value.

[0102] In this embodiment, by setting the fourth value D4 to be between 1 / 8 and 3 / 4 of the sum of the dimension of the curved surface 110 in the circumferential direction of the rotation axis 100 and the fifth value, the first adhesive layer 231 is wound around the curved surface 110 in a direction where the radius of the curved surface 110 gradually decreases, and a gap is provided between the side of the first adhesive layer 231 away from the flexible screen body 220 in the first direction and the cross section 120.

[0103] In some embodiments, along the first direction, the first adhesive layer 231 is located on the side opposite to the flexible screen body 220, and a gap is provided between it and the cross-section 120.

[0104] In some embodiments, in the curled state, along the direction in which the radius of the curved surface 110 gradually increases, the protective film layer 250 is sequentially wound from the cross section 120 around the outer periphery of the curved surface 110 located between the first adhesive layer 231 and the cross section 120, and around the outer periphery of the second region 212 of the cover plate 210.

[0105] Please see Figures 1 to 3 In some embodiments, the flexible display panel 200 includes a second adhesive layer 260, which is disposed on the side of the protective film layer 250 away from the support film layer 240. The dimension D6 of the second adhesive layer 260 in the first direction is less than or equal to the gap between the first adhesive layer 231 and the cross-section 120 along the first direction on the side away from the flexible screen body 220, and the dimension D7 in the direction in which the radius of the curved surface 110 gradually decreases. The dimension D8 of the protective film layer 250 in the first direction is greater than the dimension D6 of the second adhesive layer 260 in the first direction.

[0106] In this embodiment, in the curled state, along the direction in which the radius of the curved surface 110 gradually increases, the second adhesive layer 260 is wound around the outer periphery of the curved surface 110 located between the first adhesive layer 231 and the cross-section 120, the protective film layer 250 is wound around the outer periphery of the second adhesive layer 260, the support film layer 240 is wound around the outer periphery of the protective film layer 250, and the flexible screen 220 is wound around the outer periphery of the support film layer 240. The flexible screen 220 is fixed to the curved surface 110 between the first adhesive layer 231 and the cross-section 120 by the second adhesive layer 260. The fixing effect of the second adhesive layer 260 restricts the reverse warping of the flexible screen 220 and reduces the risk of peeling of the various film layers in the flexible screen 220.

[0107] In some embodiments, in the curled state, along the direction in which the radius of the curved surface 110 gradually increases, the second adhesive layer 260 is wound around the outer periphery of the curved surface 110 located between the first adhesive layer 231 and the cross section 120, and the protective film layer 250 is wound sequentially around the outer periphery of the second adhesive layer 260 and the outer periphery of the second region 212 of the cover plate 210.

[0108] Please see Figure 1 and Figure 5 In some embodiments, the distance between the side of the second adhesive layer 260 away from the cover plate 210 and the side of the cover plate 210 away from the second adhesive layer 260 is a sixth value D9. In the direction where the radius of the curved surface 110 gradually increases, the difference between the maximum radius of the curved surface 110 and the minimum radius of the curved surface 110 is a seventh value D10. The difference between the sixth value D9 and the seventh value D10 is between -20um and 20um.

[0109] In a conventional flexible display panel 200, the first region 211 and the second region 212 of the cover plate 210 form a radial step difference at the cross-section 120 along the maximum radius of the curved surface 110. In this embodiment, by setting the difference between the sixth value D9 and the seventh value D10 to be between -20um and 20um, the step difference formed at the cross-section 120 between the first region 211 and the second region 212 of the cover plate 210 can be reduced, thereby reducing the risk of black spots forming at the step difference between the first region 211 and the second region 212 of the cover plate 210 on the outer periphery of the second region 212 of the cover plate 210.

[0110] In some embodiments, the thickness D12 of the second adhesive layer 260 is between 30 μm and 200 μm.

[0111] In some embodiments, the distance between the side of the first adhesive layer 231 facing away from the cover plate 210 and the side of the cover plate 210 facing away from the second adhesive layer 260 is an eighth value D11, which is equal to the thickness D12 of the second adhesive layer.

[0112] Please see Figure 6 In some embodiments, the functional layer 230 includes a support layer 232, which is located on one side of the flexible screen 220 in the first direction and is in contact with the flexible screen 220. The support layer 232 is bonded to the side of the cover plate 210 near the flexible screen 220. The side of the support layer 232 away from the second region 212 of the cover plate 210 is flush with the side of the flexible screen 220 away from the first region 211 of the cover plate 210. The side of the support layer 232 away from the flexible screen 220 in the first direction is flush with the side of the cover plate 210 in the first direction. The side of the flexible screen 220 away from the support layer 220 in the first direction is flush with the other side of the cover plate 210 in the first direction.

[0113] In this embodiment, in the curled state, along the direction in which the radius of the curved surface 110 gradually increases, the support layer 232 is wound around the outer periphery of the rotating shaft 100 at least once from the cross section 120, and the flexible screen body 220 is wound around the outer periphery of the second region 212 of the cover plate 210. Since the support layer 232 is wound around the outer periphery of the rotating shaft 100 at least once, the curling radius of the flexible screen body 220 can be increased, and the risk of warping of the curled flexible screen body 220 can be reduced.

[0114] It should be noted that the material of the support layer 232 includes foam.

[0115] In some embodiments, the support layer 232 is wound around the outer periphery of the shaft 100 from the cross section 120 in a direction in which the radius of the curved surface 110 gradually increases.

[0116] In some embodiments, the outer periphery of the rotating shaft 100 is wound with at least one support layer 232.

[0117] In this embodiment, by having at least one support layer 232 wound around the outer periphery of the rotating shaft 100, the bending radius of the flexible screen 220 can be increased, reducing the risk of warping of the flexible screen 220 after bending.

[0118] In some embodiments, the opposite sides of the support membrane layer 240 in the first direction are flush with the opposite sides of the cover plate 210 in the first direction.

[0119] In this embodiment, the side of the support layer 232 facing away from the cover plate 210 is flush with the side of the flexible screen 220 facing away from the cover plate 210. In the curled state, along the direction in which the radius of the curved surface 110 gradually increases, the support film layer 240 is wound around the outer periphery of the rotating shaft 100 from the cross section 120. The support layer 232 and the flexible screen 220 are wound around the outer periphery of the support layer 232 in sequence. The second region 212 of the cover plate 210 is wound around the outer periphery of the support layer 232, and the first region 211 of the cover plate 210 is wound around the outer periphery of the flexible screen 220.

[0120] In some embodiments, the protective film layer 250 is flush with the opposite sides of the cover plate 210 in the first direction.

[0121] In this embodiment, in the curled state, along the direction in which the radius of the curved surface 110 gradually increases, the protective film layer 250 is wound around the outer periphery of the rotating shaft 100 from the cross section 120, and the support film layer 240 is wound around the outer periphery of the protective film layer 250 from the cross section 120.

[0122] This application also proposes a display device including the display module 10 of any of the foregoing claims.

[0123] In this embodiment, the functional layer 230 is wound around at least a portion of the outer periphery of the curved surface 110 along the circumferential direction of the rotating shaft 100. The second region 212 of the cover plate 210 is wound around the outer periphery of the functional layer 230 along the circumferential direction of the rotating shaft 100. The second region 212 of the cover plate 210 located on the outer periphery of the functional layer 230 is fixed to the curved surface 110 on the outer periphery of the rotating shaft 100 via the functional layer 230. The flexible display panel 200 has a rolled-up state. In the rolled-up state, the flexible screen body 220 is at least partially rolled around the outer periphery of the second region 212 of the cover plate 210 along the circumferential direction of the pivot 100. The first region 211 of the cover plate 210 is rolled around the outer periphery of the flexible screen body 220 along the circumferential direction of the pivot 100. Since the first region 211 and the second region 212 of the cover plate 210 are two parts of the same cover plate 210, the first region 211 of the cover plate 210 rolled around the outer periphery of the flexible screen body 220 is always taut. The first region 211 of the cover plate 210 applies a radial force toward the center of the pivot to the flexible screen body 220 to press the flexible screen body 220, restrict the reverse warping of the flexible screen body 220, and thereby reduce the risk of peeling of the various film layers in the flexible screen body 220.

[0124] In summary, the display device in this embodiment fixes the second region 212 of the cover plate 210 onto the curved surface 110 on the outer periphery of the rotating shaft 100, so that the first region 211 of the cover plate 210 wrapped around the outer periphery of the flexible screen body 220 is always tightened. This allows the first region 211 of the cover plate 210 to press the flexible screen body 220, restricting the reverse warping of the flexible screen body 220 and reducing the risk of peeling of the various film layers in the flexible screen body 220.

[0125] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0126] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A display module, characterized in that, The display module includes: A rotating shaft, the outer periphery of which includes a curved surface and a cross-section, wherein the radius of the curved surface gradually increases in the circumferential direction of the rotating shaft, and the cross-section connects the beginning and end of the curved surface; A flexible display panel includes a cover plate, a flexible screen body, and a functional layer. The cover plate has a first region and a second region arranged along a first direction. The flexible screen body is disposed on one side of the cover plate and located in the first region. The functional layer is disposed on the side of the cover plate close to the flexible screen body and located in the second region. The functional layer is wound around at least a portion of the outer periphery of the curved surface along the circumferential direction of the rotation axis. The flexible display panel has a rolled-up state, in which the flexible screen body is at least partially rolled around the outer periphery of the second region of the cover plate along the circumferential direction of the rotation axis.

2. The display module according to claim 1, characterized in that, The cross-section is radially parallel to the maximum radius of the curved surface; Optionally, the flexible display panel includes a support film layer, which is disposed on the side of the flexible screen body away from the cover plate; Optionally, in the curled state, the support film layer is wound around at least a portion of the outer periphery of the second region of the cover plate; Optionally, the flexible display panel includes a protective film layer, which is disposed on the side of the supporting film layer opposite to the flexible screen body; Optionally, in the curled state, the protective film layer is wound around at least a portion of the outer periphery of the second region of the cover plate.

3. The display module according to claim 2, characterized in that, The functional layer includes a first adhesive layer, which is arranged at intervals with the flexible screen body along the first direction. Optionally, the first adhesive layer is arranged at intervals with the cross section on the side close to the flexible screen along the first direction, and the first adhesive layer is arranged on the side away from the flexible screen along the first direction, and is wound around the curved surface along the direction of gradually decreasing radius of the curved surface. Optionally, the distance between the first adhesive layer and the side of the flexible screen body that is close to the first adhesive layer along the first direction and the cross section in the direction in which the radius of the curved surface gradually decreases is a first value, and the distance between the first adhesive layer and the flexible screen body in the first direction is a second value, wherein the first value is less than or equal to the second value; Optionally, when the first value is equal to the second value, in the curled state, the flexible screen body is in contact with the cross-section on the side close to the first adhesive layer along the first direction, and the flexible screen body is on the side away from the first adhesive layer along the first direction, and is rolled around at least part of the outer periphery of the second region of the cover plate along the direction in which the radius of the curved surface gradually increases. Optionally, when the first value is less than the second value, in the curled state, the flexible screen body is arranged at intervals with the side of the cross-section that is close to the first adhesive layer along the first direction and the cross-section is arranged at intervals along the direction of gradually increasing radius of the curved surface. The flexible screen body is rolled around at least part of the outer periphery of the second region of the cover plate along the first direction away from the first adhesive layer and along the direction of gradually increasing radius of the curved surface. Optionally, the first adhesive layer is flush with one side of the cover plate in the first direction, away from the flexible screen body, and the flexible screen body is flush with the other side of the cover plate in the first direction, away from the first adhesive layer.

4. The display module according to claim 3, characterized in that, Along the first direction, the supporting film layer extends out of the flexible screen body from the side near the first adhesive layer, and the extension length is a third value, the third value is less than the second value, and the first value is equal to the third value; The protective film layer is flush with the side of the supporting film layer that is close to the first adhesive layer along the first direction; Optionally, in the curled state, the protective film layer is in contact with the cross-section on the side of the first adhesive layer along the first direction; The protective film layer is located on the side opposite to the first adhesive layer along the first direction, and is wound around at least a portion of the outer periphery of the second region of the cover plate in the direction in which the radius of the curved surface gradually increases; The supporting film layer is in contact with the cross-section on the side of the first adhesive layer along the first direction; Along the first direction, the supporting film layer is wound around the outer periphery of the protective film layer on the side opposite to the first adhesive layer in the direction in which the radius of the curved surface gradually increases; The flexible screen body, on the side away from the first adhesive layer, is wound around the outer periphery of the supporting film layer in a direction that gradually increases in radius along the curved surface.

5. The display module according to claim 4, characterized in that, The dimension of the second region of the cover plate in the first direction is a fourth value, which is less than or equal to the sum of the dimension of the curved surface in the circumferential direction of the axis of rotation and a fifth value. The fifth value is equal to the product of the dimension of the first adhesive layer in the second direction and 2pi, where pi represents pi. The second direction is intersecting the first direction. Optionally, the fourth value is equal to the sum of the dimension of the surface in the circumferential direction of the axis of rotation and the fifth value; Optionally, in the curled state, the first adhesive layer is in contact with the cross-section on the side opposite to the flexible screen body along the first direction; The protective film layer is located on the side opposite to the first adhesive layer along the first direction, and is wound around the outer periphery of the second region of the cover plate in the direction in which the radius of the curved surface gradually increases.

6. The display module according to claim 5, characterized in that, The fourth value is between 1 / 8 and 3 / 4 of the sum of the circumferential dimension of the surface on the axis of rotation and the fifth value; Optionally, along the first direction, the first adhesive layer is separated from the flexible screen body on one side, and a gap is provided between the first adhesive layer and the cross-section. Optionally, in the curled state, along the direction in which the radius of the curved surface gradually increases, the protective film layer is sequentially rolled from the cross-section around the outer periphery of the curved surface located between the first adhesive layer and the cross-section, and around the outer periphery of the second region of the cover plate.

7. The display module according to claim 6, characterized in that, The flexible display panel includes a second adhesive layer, which is disposed on the side of the protective film layer away from the supporting film layer. The size of the second adhesive layer in the first direction is less than or equal to the size of the gap between the first adhesive layer and the cross-section along the first direction on the side of the flexible screen away from the screen body, in the direction in which the radius of the curved surface gradually decreases. The dimension of the protective film layer in the first direction is greater than the dimension of the second adhesive layer in the first direction; Optionally, in the curled state, along the direction in which the radius of the curved surface gradually increases, the second adhesive layer is wound around the outer periphery of the curved surface located between the first adhesive layer and the cross-section; the protective film layer is sequentially wound around the outer periphery of the second adhesive layer and the outer periphery of the second region of the cover plate.

8. The display module according to claim 7, characterized in that, The distance between the side of the second adhesive layer away from the cover plate and the side of the cover plate away from the second adhesive layer is a sixth value. In the direction where the radius of the curved surface gradually increases, the difference between the maximum radius of the curved surface and the minimum radius of the curved surface is a seventh value. The difference between the sixth value and the seventh value is between -20um and 20um. Optionally, the thickness of the second adhesive layer is between 30µm and 200µm; Optionally, the distance between the side of the first adhesive layer away from the cover plate and the side of the cover plate away from the second adhesive layer is an eighth value, and the eighth value is equal to the thickness of the second adhesive layer.

9. The display module according to claim 2, characterized in that, The functional layer includes a support layer. The support layer is located on one side of the flexible screen in the first direction and is in contact with the flexible screen. The support layer is bonded to the side of the cover plate near the flexible screen. The side of the support layer away from the second region of the cover plate is flush with the side of the flexible screen away from the first region of the cover plate. The support layer is flush with the cover plate on one side of the flexible screen body along the first direction, away from the support layer. The flexible screen body is flush with the cover plate on the other side of the first direction, away from the support layer. Optionally, in the direction where the radius of the curved surface gradually increases, the support layer is wound around the outer periphery of the rotating shaft from the cross-section; Optionally, the outer periphery of the rotating shaft is wound with at least one turn of the support layer; Optionally, the opposite sides of the support membrane layer in the first direction are flush with the opposite sides of the cover plate in the first direction; Optionally, the protective film layer on opposite sides in the first direction is flush with the cover plate on opposite sides in the first direction.

10. A display device, characterized in that, The display module includes any one of claims 1-9.

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