Display device

Abstract

The utility model discloses a display device, and belongs to the technical field of display. The display device includes a reel and a flexible display panel. When the reel in the display device rotates, the reel can drive the curled display part in the flexible display panel to be wound on the reel, so that the size of the area, used for displaying pictures, of the flexible display panel is reduced, and the display device is convenient to carry. Moreover, a part of the bent connecting part is reversely bent in the accommodating groove relative to the curled display part wound on the reel, so that the bent connecting part can play a role in reducing the bending stress of the curled display part, and the strain of the curled display part during curling is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of display, in particular to a display device. Background Art

[0002] Currently, display devices may use flexible display panels as display screens. Compared with traditional display panels, flexible display panels have advantages such as being deformable, bendable, and having good flexibility.

[0003] The display device generally includes: a housing, a reel located in the housing and a flexible display panel, the reel itself can rotate, and the flexible display panel can be unfolded or rolled up under the drive of the reel, so that the display device has an unfolded state and a retracted state, thereby realizing the size adjustment function of the display surface of the display device.

[0004] However, the above-mentioned flexible display panel is more likely to fail. Utility Model Content

[0005] The present utility model provides a display device. The technical solution is as follows:

[0006] According to one aspect of the present invention, a display device is provided, comprising:

[0007] A reel, the reel having a receiving groove, the receiving groove having a first opening;

[0008] A flexible display panel, the flexible display panel having a display surface and a back surface opposite to each other, the flexible display panel comprising: a rollable display portion and a curved connection portion extending from an edge of the rollable display portion, the rollable display portion being capable of being rolled up on the reel, at least a portion of the curved connection portion being located in the accommodating groove via the first opening, and the curved connection portion being connected to the reel;

[0009] The accommodating groove is configured to limit the bending direction of the curved connecting portion located in the accommodating groove, the protruding direction of the partial curved connecting portion located in the accommodating groove is a first protruding direction, the protruding direction of the rolled display portion wound on the reel is a second protruding direction, one of the first protruding direction and the second protruding direction is the direction in which the display surface approaches the back surface, and the other protruding direction is the direction in which the display surface moves away from the back surface.

[0010] Optionally, the accommodating groove has a first groove wall and a second groove wall opposite to each other, at least a portion of the display surface of the curved connecting portion is in contact with the first groove wall, and at least a portion of the back surface of the curved connecting portion is in contact with the second groove wall;

[0011] Alternatively, at least a portion of the back surface of the curved connection portion is in contact with the first groove wall, and at least a portion of the display surface of the curved connection portion is in contact with the second groove wall.

[0012] Optionally, the accommodating groove includes a first curved groove and a second curved groove, the first end of the second curved groove is connected to the first curved groove, the second end of the second curved groove is connected to the first opening, the first curved groove has two opposite first curved surfaces, and the second curved groove has two opposite second curved surfaces;

[0013] The protruding direction of the curved connection portion located in the second curved groove is the second protruding direction;

[0014] The protruding direction of the curved connection portion located in the first curved groove is the first protruding direction.

[0015] Optionally, the reel has an outer wall, and the first curved surface, the second curved surface and the outer wall satisfy the following relationship:

[0016] R3≤R2<R1;

[0017] Wherein, R1 is the first curvature radius of the outer wall of the shaft, R2 is the second curvature radius of the second curved surface, and R3 is the third curvature radius of the first curved surface.

[0018] Optionally, the accommodating groove further comprises a strip groove, and two ends of the strip groove are respectively connected to the first curved groove and the second curved groove;

[0019] The strip-shaped groove has two opposite strip-shaped surfaces, and two ends of the strip-shaped surfaces are tangent to the first curved surface and the second curved surface respectively.

[0020] Optionally, the first curved surface and the second curved surface are tangent to each other.

[0021] Optionally, the second curved surface of the second curved groove is connected to the outer wall of the reel, and an end of the second curved surface away from the first curved surface is tangent to the outer wall of the shaft.

[0022] Optionally, the reel comprises a first shaft body and a second shaft body that are fixedly connected, and in a first direction, the length of the first shaft body and the length of the second shaft body are both greater than the width of the curved connection portion, and the first direction is a direction parallel to the axis of the reel;

[0023] The first shaft body has a first axial surface and a second axial surface opposite to each other along a second direction, and the second shaft body has a third axial surface and a fourth axial surface opposite to each other along the second direction, wherein the second direction is a direction perpendicular to the axis of the reel;

[0024] The second axial surface and the third axial surface are complementary in shape, and the second axial surface is the first groove wall, the third axial surface is the second groove wall, and the first axial surface and the fourth axial surface are spliced ​​to form the outer wall of the reel.

[0025] Optionally, the reel comprises a first shaft body and a second shaft body that are fixedly connected, and in a first direction, the length of the first shaft body and the length of the second shaft body are both greater than the width of the curved connection portion, and the first direction is a direction parallel to the axis of the reel;

[0026] The first shaft body has an inner cavity, the second shaft body is located in the inner cavity, the outer wall of the second shaft body is complementary to the shape of the cavity wall of the inner cavity, the outer wall of the second shaft body is the first groove wall and the cavity wall of the inner cavity is the second groove wall, and the outer wall of the first shaft body is the outer wall of the shaft of the reel.

[0027] Optionally, an end of the curved connection portion away from the rolled display portion is connected to an end of the accommodating groove away from the first opening.

[0028] Optionally, the curved connection portion located in the accommodating groove is bonded to the first groove wall and the second groove wall respectively.

[0029] Optionally, the thickness of the rolled display portion is greater than or equal to the thickness of the curved connection portion.

[0030] Optionally, the curled display portion comprises a cover layer, a polarizing layer, a touch display layer, a back film layer and a support layer stacked in sequence;

[0031] The curved connection portion includes a first structure layer, a second structure layer and a third structure layer, the first structure layer and the polarizing layer are an integral structure, the second structure layer and the touch display layer are an integral structure, and the third structure layer and the back film layer are an integral structure.

[0032] Optionally, the flexible display panel further comprises an extending fixing portion extending from the curved connecting portion away from an edge of the curled display portion;

[0033] The accommodating groove further has a second opening opposite to the first opening, and at least a portion of the extending fixing portion is located outside the accommodating groove via the second opening and is fixedly connected to the outer wall of the reel.

[0034] Optionally, the thickness of the curved connecting portion is greater than or equal to the thickness of the extending fixing portion.

[0035] Optionally, the curled display portion comprises a cover layer, a polarizing layer, a touch display layer, a back film layer and a support layer stacked in sequence;

[0036] The curved connection portion includes a first structure layer, a second structure layer and a third structure layer, the first structure layer and the polarizing layer are an integrated structure, the second structure layer and the touch display layer are an integrated structure, and the third structure layer and the back film layer are an integrated structure;

[0037] The extending fixing portion includes a fourth structural layer, and the fourth structural layer is at least an integral structure with the third structural layer.

[0038] Optionally, the bending angle range of the extended fixing portion is 40° to 50°.

[0039] Optionally, a first step is provided on the outer wall of the scroll, and one end of the curved connecting portion extends out of the first opening and is connected to the curled display portion;

[0040] The first step includes a first table top, a first bottom surface, and a first side surface connecting the first table top and the first bottom surface. The curved connection portion is located on the first table top, and the rolled display portion is located on the first bottom surface.

[0041] Optionally, the height of the first step is consistent with the thickness of the support layer.

[0042] Optionally, the curved connection portion comprises a forward curved portion and a reverse curved portion connected away from the curled display portion, the forward curved portion is located in the second curved groove, and the reverse curved portion is located in the first curved groove;

[0043] The forward curved portion is respectively fitted with the two second curved surfaces of the second curved groove, and the reverse curved portion is respectively fitted with the first curved surface of the first curved groove;

[0044] The bending angle range of the forward bending portion is 70° to 100°, and the bending angle range of the reverse bending portion is 70° to 100°.

[0045] The beneficial effects brought by the technical solution provided by the embodiment of the utility model include at least:

[0046] A display device including a scroll and a flexible display panel is provided. When the scroll in the display device rotates, the scroll can drive the rolled display portion in the flexible display panel to roll up on the scroll, so that the size of the area of ​​the flexible display panel used to display the picture is reduced, thereby making it easy to carry. In addition, by bending a portion of the bent connection portion in the receiving groove in the opposite direction relative to the rolled display portion rolled up on the scroll, the bent connection portion can play a role in reducing the bending stress of the rolled display portion, thereby reducing the strain of the rolled display portion when rolling, reducing the probability of the flexible display panel failing, and improving the display effect of the flexible display panel after repeated winding. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0048] Figure 1 is a partial structural schematic diagram of a display device;

[0049] Figure 2 yes Figure 1 A schematic diagram of the structure of the display device shown in a retracted state;

[0050] Figure 3 It is a structural schematic diagram of a display device provided by an embodiment of the utility model;

[0051] Figure 4 yes Figure 3 A schematic diagram of a cross-sectional structure of the display device along position A1-A2 shown;

[0052] Figure 5 yes Figure 4 A schematic diagram of a structure in which a partially rolled display portion of a display device is rolled up on a reel;

[0053] Figure 6 It is a structural schematic diagram of a scroll provided by an embodiment of the utility model;

[0054] Figure 7 It is a structural schematic diagram of a flexible display panel provided by an embodiment of the utility model;

[0055] Figure 8 is a schematic structural diagram of another display device provided by an embodiment of the utility model;

[0056] Fig. 9 yes Figure 8 A schematic diagram of the structure of a scroll in the display device shown;

[0057] Fig.10 is a schematic structural diagram of another display device provided by an embodiment of the utility model;

[0058] Fig.11 yes Fig.10 A schematic diagram of the structure of a scroll in the display device shown;

[0059] Fig.12 is a schematic structural diagram of another display device provided by an embodiment of the utility model;

[0060] Fig.13yes Fig.12 A schematic diagram of the structure of a scroll in the display device shown;

[0061] Fig.14 is a schematic structural diagram of another display device provided by an embodiment of the utility model;

[0062] Fig.15 yes Fig.14 A schematic diagram of the structure of a scroll in the display device shown;

[0063] Fig.16 This is a schematic diagram of a flexible display panel after being unfolded provided by an embodiment of the utility model;

[0064] Fig.17 yes Fig.16 The schematic diagram of the structure of the flexible display panel wound on the reel is shown;

[0065] Fig.18 It is a schematic diagram of simulation results of a flexible display panel in the related art;

[0066] Fig.19 It is a schematic diagram of simulation results of a flexible display panel provided by an embodiment of the utility model;

[0067] Fig. 20 is a schematic structural diagram of another display device provided by an embodiment of the utility model;

[0068] Fig.21 is a schematic structural diagram of another display device provided by an embodiment of the utility model;

[0069] Fig. 22 yes Fig.21 A schematic diagram of unfolding a flexible display panel in the display device shown;

[0070] Fig.23 is a schematic structural diagram of another display device provided by an embodiment of the utility model;

[0071] Fig.24 It is a schematic diagram of the structure of another display device.

[0072] The above drawings have shown clear embodiments of the present invention, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present invention in any way, but to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0073] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0074] Please refer to Figure 1 and Figure 2 , Figure 1 is a partial structural diagram of a display device 20, Figure 2 yes Figure 1 The structure diagram of the display device 20 shown is in a retracted state, Figure 1 The display device 20 shown is in an unfolded state, and the display device 20 includes a housing (not shown in the figure), a reel 21 located in the housing, and a flexible display panel 22. The display device 20 can use the reel 21 to realize the unfolding or curling of the flexible display panel 22. Among them, the reel 21 itself can rotate, and one end of the flexible display panel 22 is fixedly connected to the reel 21, so that the flexible display panel 22 can be unfolded or curled under the drive of the reel 21. In this way, the display device 20 has an unfolded state and a retracted state, and the size adjustment function of the display surface of the display device 20 can be realized.

[0075] However, when the flexible display panel 22 is rolled up on the shaft, the film layer on the flexible display panel 22 will generate stress and strain during the bending process, which may cause problems such as film breakage and adhesive peeling on the flexible display panel 22.

[0076] Please refer to Figure 3 , Figure 4 and Figure 5 , Figure 3 is a schematic diagram of the structure of a display device 10 provided in an embodiment of the utility model, Figure 4 yes Figure 3 The cross-sectional structure diagram of the display device 10 along the position A1-A2 is shown, Figure 5 yes Figure 4 The structure diagram of the partially rolled display portion 121 of the display device 10 shown is wound on the reel 11 . The display device 10 may include: a reel 11 and a flexible display panel 12 .

[0077] Please refer to Figure 6 , Figure 6 1 is a schematic diagram of a structure of a reel 11 provided by an embodiment of the utility model. The reel 11 may have a receiving groove C1, and the receiving groove C1 may have a first opening k1. The receiving groove C1 may be located inside the reel 11, and the first opening k1 may be located on the outer wall D1 of the reel 11.

[0078] The flexible display panel 12 may have a display surface p1 and a back surface p2 opposite to each other, and the back surface p2 of the flexible display panel 12 is a surface where the non-display surface is located. The flexible display panel 12 may include: a rollable display portion 121 and a curved connection portion 122 extending from the edge of the rollable display portion 121, the rollable display portion 121 can be rolled up on the reel 11, at least a portion of the curved connection portion 122 is located in the receiving groove C1 via the first opening k1, and the curved connection portion 122 is connected to the reel 11. The rollable display portion 121 and the curved connection portion 122 may be an integral structure, and the display surface p1 of the flexible display panel 12 may have a display area and a non-display area, the rollable display portion 121 may belong to the display area, and the curved connection portion 122 may belong to the non-display area, that is, when the display device 10 is in an unfolded state, the rollable display portion 121 may display a picture (such as a picture, a video, etc.), and when the display device 10 is in a retracted state, the rollable display portion 121 may not display a picture. When the display device 10 is in the expanded state or the contracted state, the curved connection portion 122 may not display any image.

[0079] The curved connection portion 122 may extend from the first edge of the rolled display portion 121, and the first edge may be parallel to the length direction of the first opening k1, and the length direction of the first opening k1 is a direction parallel to the axis of the scroll 11. The curved connection portion 122 may be fixedly connected to the scroll 11, and illustratively, the curved connection portion 122 may be bonded to the scroll 11.

[0080] Please refer to Figure 7 , Figure 7 is a schematic diagram of the structure of a flexible display panel 12 provided in an embodiment of the utility model, Figure 7 The flexible display panel 12 is shown in a state where at least a portion of the flexible display panel 12 is rolled up on the reel 11. Figure 7 The scroll 11 and the film structure of the flexible display panel 12 are not shown in the figure, so as to more clearly show the display surface p1 and the back surface p2 of the flexible display panel 12, wherein the solid line is used to represent the back surface p2 of the flexible display panel 12, and the dotted line is used to represent the display surface p1 of the flexible display panel 12.

[0081] Please refer to Figure 6 and Figure 7, the accommodating groove C1 can be configured to define a bending direction of the curved connection portion 122 located in the accommodating groove C1, the protruding direction of the partially curved connection portion 122 located in the accommodating groove C1 is a first protruding direction, and the protruding direction of the rolled display portion 121 wound on the reel 11 is a second protruding direction, one of the first protruding direction and the second protruding direction is a direction in which the display surface p1 approaches the back surface p2, and the other protruding direction is a direction in which the display surface p1 moves away from the back surface p2. The bending direction of the partially curved connection portion 122 located in the accommodating groove C1 can be opposite to the bending direction of the rolled display portion 121 wound on the reel 11. For example, as Figure 7 As shown, at least a portion of the display surface p1 of the curved connection portion 122 is a concave surface, and the display surface p1 of the rolled display portion 121 wound on the reel 11 is a convex surface.

[0082] In the embodiment of the present utility model, Figure 4 As shown, the flexible display panel 12 may further include a planar display portion 124 located at one end of the rolled display portion 121 away from the curved connection portion 122 and connected to the rolled display portion 121. The planar display portion 124 may be fixedly connected to a housing (not shown) of the display device 10.

[0083] like Figure 4 , Figure 5 and Figure 6As shown, when the scroll 11 in the display device 10 rotates clockwise, the rolled display portion 121 in the flexible display panel 12 can be gradually stretched, and most of the display surface p1 of the planar display portion 124 in the flexible display panel 12 and the display surface p1 of the rolled display portion 121 are located in the same plane (so that the size of the area of ​​the flexible display panel 12 used to display the picture is increased), and are used to display the picture. When the scroll 11 in the display device 10 rotates counterclockwise, the scroll 11 can drive the rolled display portion 121 in the flexible display panel 12 to be wound on the scroll 11, so that the size of the area of ​​the flexible display panel 12 used to display the picture is reduced, thereby making it easier to carry. In addition, the bending direction of the partially bent connecting portion 122 is defined by the receiving groove C1 in the reel 11 to be opposite to the bending direction of the rolled display portion 121 wound on the reel 11, that is, by bending the partially bent connecting portion 122 in the receiving groove C1 in the opposite direction relative to the rolled display portion 121 wound on the reel 11, the bent connecting portion 122 can play a role in reducing the bending stress of the rolled display portion 121, so as to reduce the strain generated by the rolled display portion 121 when rolled, and avoid problems such as film breakage and adhesive layer shedding of the flexible display panel 12 due to winding, so as to improve the anti-bending performance of the flexible display panel 12, reduce the probability of the film layer of the flexible display panel 12 failing, and improve the display effect of the display device 10. It should be noted that in the embodiment of the utility model, the reel rotates in the clockwise direction to unfold the flexible display panel, and those skilled in the art can set the reel to rotate in the counterclockwise direction according to actual needs to unfold the flexible display panel, and the embodiment of the utility model is not limited to this.

[0084] In summary, the embodiment of the utility model provides a display device including a scroll and a flexible display panel. When the scroll in the display device rotates, the scroll can drive the rolled display portion in the flexible display panel to roll on the scroll, so that the size of the area of ​​the flexible display panel used to display the picture is reduced, thereby making it easy to carry. In addition, by bending part of the bent connection portion in the receiving groove in the opposite direction relative to the rolled display portion wound on the scroll, the bent connection portion can play a role in reducing the bending stress of the rolled display portion, so as to reduce the strain of the rolled display portion when rolling, reduce the probability of failure of the flexible display panel, and improve the display effect of the flexible display panel after repeated winding.

[0085] In an alternative implementation, please refer to Figure 5 and Figure 6The receiving groove C1 may have a first groove wall c11 and a second groove wall c12 opposite to each other, at least a portion of the display surface p1 of the curved connection portion 122 is in contact with the first groove wall c11, and at least a portion of the back surface p2 of the curved connection portion 122 is in contact with the second groove wall c12, or at least a portion of the back surface p2 of the curved connection portion 122 is in contact with the first groove wall c11, and at least a portion of the display surface p1 of the curved connection portion 122 is in contact with the second groove wall c12. In this way, the receiving groove C1 may clamp at least a portion of the curved connection portion 122 between the first groove wall c11 and the second groove wall c12, so that the shape of the curved connection portion 122 is defined by the first groove wall c11 and the second groove wall c12.

[0086] In an alternative implementation, please refer to Figure 5 and Figure 6 , one end of the curved connection portion 122 of the flexible display panel 12 away from the rolled display portion 121 is connected to one end of the receiving groove C1 away from the first opening k1. In this way, the curved connection portion 122 of the flexible display panel 12 can fill the receiving groove C1, and the shape of the curved connection portion 122 located in the receiving groove C1 can be similar to the shape of the receiving groove C1.

[0087] Please refer to Figure 8 and Fig. 9 , Figure 8 is a schematic structural diagram of another display device 10 provided in an embodiment of the utility model. Fig. 9 yes Figure 8 The schematic diagram of the structure of the scroll 11 in the display device 10 shown in FIG. Figure 8 and Figure 5 ,as well as Fig. 9 and Figure 6 It can be a schematic diagram of dividing the same structure in different ways. In an optional embodiment, the accommodating groove C1 may include a first curved groove B1 and a second curved groove B2. The first end of the second curved groove B2 is connected to the first curved groove B1, and the second end of the second curved groove B2 is connected to the first opening k1. The first curved groove B1 has two opposite first curved surfaces b11, and the second curved groove B2 has two opposite second curved surfaces b21. The convex direction of the curved connecting portion 122 located in the second curved groove B2 is the second convex direction; the convex direction of the curved connecting portion 122 located in the first curved groove B1 is the first convex direction. The two opposite first curved surfaces b11 of the first curved groove B1 are parallel, and the two opposite second curved surfaces b21 of the second curved groove B2 are also parallel. It can be understood that, in the embodiment of the present invention, the two first curved surfaces b11 being parallel means that the shapes of the two first curved surfaces b11 are similar and they are parallel within a certain tolerance range. Similarly, the two second curved surfaces b21 being parallel means that the shapes of the two second curved surfaces b21 are similar and they are parallel within a certain tolerance range.

[0088] In an optional embodiment, the curved connection portion 122 may include a forward curved portion 1224 and a reverse curved portion 1225 sequentially connected in a direction away from the rolled display portion 121, the forward curved portion 1224 may be located in the second curved groove B2, and the reverse curved portion 1225 may be located in the first curved groove B1. The forward curved portion 1224 is respectively fitted with two second curved surfaces b21 of the second curved groove B2, and the reverse curved portion 1225 is respectively fitted with the first curved surface b11 of the first curved groove B1.

[0089] The second curved groove B2 can clamp the forward bend 1224 between the two second curved surfaces b21 to jointly define the shape of the forward bend 1224 by the two second curved surfaces b21, and the first curved groove B1 can clamp the reverse bend 1225 between the two first curved surfaces b11 to jointly define the shape of the reverse bend 1225 by the two first curved surfaces b11.

[0090] The bending direction of the forward bending portion 1224 located in the second curved groove B2 may be the same as the bending direction of the rolled display portion 121 wound on the scroll 11, and the bending direction of the reverse bending portion 1225 located in the first curved groove B1 may be opposite to the bending direction of the rolled display portion 121 wound on the scroll 11. In this way, the forward bending portion 1224 located in the second curved groove B2 can be used as a transition structure between the rolled display portion 121 and the reverse bending portion 1225, and the forward bending portion 1224 can play a role of transition and gradual change between the rolled display portion 121 and the reverse bending portion 1225, so as to reduce the bending stress of the flexible display panel 12 during the bending process, and avoid the stress concentration problem at the connection between the rolled display portion 121 and the reverse bending portion 1225 caused by the sudden change of the bending direction between the rolled display portion 121 and the reverse bending portion 1225, so as to avoid the phenomenon of cracks or cracks in the flexible display panel 12 during the bending process, so as to improve the quality of the flexible display panel 12.

[0091] The bending directions of multiple parts of the flexible display panel 12 in the embodiment of the utility model are the same or the bending directions are opposite, which can be understood as the convex directions of the flexible display panel 12 are the same or the convex directions are the same and opposite. This is because when two parts on the flexible display panel 12 have the same convex direction, the displacement directions of multiple film layers of the two parts are the same, that is, the directions of the strains generated by the two parts are the same, so the two parts that generate strains in the same direction can be regarded as two parts with the same bending direction. Of course, the two parts can also be three parts or more parts, and the embodiment of the utility model is not limited to this. Similarly, if the directions of the strains generated by two parts are opposite, it can be considered that the bending directions of the two parts are opposite. For example, please refer to Figure 7 and Figure 8 Since the protruding direction of the forward bending portion 1224 is the direction from the back side p2 to the front side p1, and the protruding direction of the curled display portion 121 is also the direction from the back side p2 to the front side p1, the bending direction of the forward bending portion 1224 is the same as the bending direction of the curled display portion 121; similarly, since the protruding direction of the reverse bending portion 1225 is the direction from the front side p1 to the back side p2, the bending direction of the reverse bending portion 1225 is opposite to the bending direction of the curled display portion 121.

[0092] In an exemplary embodiment, when the display device 10 is in a retracted state, the number of curling turns of the curled display portion 121 on the scroll 11 can be greater than or equal to 2, and at least one of the forward bending portion 1224 and the reverse bending portion 1225 can be bonded to the first groove wall c11 and the second groove wall c12 of the accommodating groove C1.

[0093] Please refer to Figure 8 and Fig. 9 In an optional embodiment, the reel 11 has an outer wall D1, and the first curved surface b11 of the first curved groove B1, the second curved surface b21 of the second curved groove B2 and the outer wall D1 of the reel 11 satisfy the following relationship:

[0094] R3≤R2<R1;

[0095] Among them, R1 is the first curvature radius of the axial outer wall D1 of the reel 11, R2 is the second curvature radius of the second curved surface b21 of the second curved groove B2, and R3 is the third curvature radius of the first curved surface b11 of the first curved groove B1.

[0096] The radius of curvature of the flexible display panel 12 when bent is negatively correlated with the degree of bending of the flexible display panel 12, that is, the larger the radius of curvature of the flexible display panel 12, the smaller the degree of bending of the flexible display panel 12. The degree of bending of the flexible display panel 12 is positively correlated with the strain generated by the flexible display panel 12 during the bending process, that is, the smaller the degree of bending of the flexible display panel 12, the smaller the strain generated by the flexible display panel 12 during the bending process. Therefore, it can be concluded that the radius of curvature of the flexible display panel 12 is negatively correlated with the strain generated by the flexible display panel 12 during the bending process, that is, the larger the radius of curvature of the flexible display panel 12, the smaller the strain generated by the flexible display panel 12 during the bending process.

[0097] In an embodiment of the utility model, a third curvature radius R3 of a first curved surface b11 of a first curved groove B1 is smaller than a first curvature radius R1 of an axial outer wall D1 of a scroll 11, that is, a curvature degree of a first curved surface b11 of a first curved groove B1 is greater than a curvature degree of an axial outer wall D1 of a scroll 11, so that a curvature degree of a reverse bending portion 1225 in a first curved groove B1 can be greater than a curvature degree of a rolled display portion 121 rolled on a scroll 11. In this way, a strain generated when a reverse bending portion 1225 in a first curved groove B1 is bent can eliminate a strain generated when the rolled display portion 121 is rolled on the scroll 11. This can reduce a strain generated when the rolled display portion 121 is rolled, improve the bending resistance of a flexible display panel 12, reduce the probability of failure of a film layer of a flexible display panel 12, and improve the display effect of a display device 10.

[0098] Furthermore, the third curvature radius R3 of the first curved surface b11 of the first curved groove B1 may also be less than or equal to the second curvature radius R2 of the second curved surface b21 of the second curved groove B2, that is, the curvature of the first curved surface b11 of the first curved groove B1 may be greater than or equal to the curvature of the second curved surface b21 of the second curved groove B2, so that the curvature of the reverse curved portion 1225 located in the first curved groove B1 may be greater than or equal to the curvature of the forward curved portion 1224 located in the second curved groove B2.

[0099] Alternatively, the third curvature radius R3 of the first curved surface b11 of the first curved groove B1 can also be smaller than the second curvature radius R2 of the second curved surface b21 of the second curved groove B2, that is, the curvature of the first curved surface b11 of the first curved groove B1 can be greater than the curvature of the second curved surface b21 of the second curved groove B2, so that the curvature of the reverse bend 1225 located in the first curved groove B1 can be greater than the curvature of the forward bend 1224 located in the second curved groove B2.

[0100] The second curvature radius R2 of the second curved surface b21 of the second curved groove B2 can also be smaller than the first curvature radius R1 of the axial outer wall D1 of the scroll 11, that is, the curvature of the second curved surface b21 of the second curved groove B2 can be greater than the curvature of the axial outer wall D1 of the scroll 11, so that the curvature of the positive curved portion 1224 located in the second curved groove B2 can be greater than the curvature of the rolled display portion 121 wound on the scroll 11. In this way, the film stress between the positive curved portion 1224 and the reverse curved portion 1225 and the rolled display portion 121 can be neutralized to ensure that the strain generated when the reverse curved portion 1225 located in the first curved groove B1 is bent can be reduced, and the strain generated when the rolled display portion 121 is wound on the scroll 11, and the strain of the curved connection portion 122 located in the accommodating groove C1 is less than or equal to the strain of the rolled display portion 121 wound on the scroll 11.

[0101] Please refer to Figure 8 and Fig. 9 In an optional embodiment, the accommodating groove C1 may further include a strip groove B3, the two ends of which are respectively connected to the first curved groove B1 and the second curved groove B2. The strip groove B3 may have two opposite strip surfaces b31, the two ends of which are respectively tangent to the first curved surface b11 and the second curved surface b21. The strip groove B3 is located between the first curved groove B1 and the second curved groove B2, and the strip groove B3 may play a role of gradual transition, so that the first curved groove B1 and the second curved groove B2 can be smoothly connected.

[0102] The curved connection portion 122 may further include a transition portion 1226 located between the forward curved portion 1224 and the reverse curved portion 1225, and the two ends of the transition portion 1226 may be connected to the forward curved portion 1224 and the reverse curved portion 1225, respectively, and the transition portion 1226 may be located in the strip groove B3. When at least a portion of the curved connection portion 122 is located in the accommodating groove C1, the forward curved portion 1224 located in the second curved groove B2 and the reverse curved portion 1225 located in the first curved groove B1 may be smoothly transitioned through the transition portion 1226 located in the strip groove B3, so that the curved connection portion 122 is relatively gentle during the bending process, and the problem of stress concentration on the curved connection portion 122 may be avoided, and the risk of fracture failure of the flexible display panel 12 may be further reduced.

[0103] In an exemplary embodiment, please refer to Figure 8 and Fig. 9 , the bending angle range of the first curved surface b11 of the first curved groove B1 can be 70°~100°, and the bending angle range of the second curved surface b21 of the second curved groove B2 can be 70°~100°. Exemplarily, the bending angle of the first curved surface b11 of the first curved groove B1 can be 70°, 80°, 85°, 90° or 95°, and the bending angle of the second curved surface b21 of the second curved groove B2 can be 70°, 75°, 80°, 85° or 93°. Since the first curved groove B1 is used to define the bending shape of the reverse bending portion 1225, and the second curved groove B2 is used to define the bending shape of the forward bending portion 1224, the bending angle range of the reverse bending portion 1225 can be 70°~100°, and the bending angle range of the forward bending portion 1224 can be 70°~100°.

[0104] Exemplarily, the first curvature radius R1 of the outer wall D1 of the scroll 11, the second curvature radius R2 of the second curved surface b21 of the second curved groove B2, and the third curvature radius R3 of the first curved surface b11 of the first curved groove B1 can satisfy the following relationship: R1=1.5*R2~2*R2, R2>R3, R3>0.5*R1. Within this range, the problem of the curvature radius of the curved connection portion 122 located in the accommodating groove C1 being too small, resulting in the strain of the curved connection portion 122 being too large compared to the strain of the curled display portion 121, can be avoided.

[0105] Please refer to Fig.10 and Fig.11 , Fig.10 is a schematic structural diagram of another display device 10 provided in an embodiment of the utility model. Fig.11 yes Fig.10 The schematic diagram of the structure of the scroll 11 in the display device 10 shown in the figure, in an exemplary embodiment, the scroll 11 may also have a transition outer wall D2, the transition outer wall D2 may be located between the second curved surface b21 of the second curved groove B2 and the axial outer wall D1 of the scroll 11, the two ends of the transition outer wall D2 are respectively connected to the second curved surface b21 of the second curved groove B2 and the axial outer wall D1 of the scroll 11, and the two ends of the transition outer wall D2 are respectively tangent to the second curved surface b21 of the second curved groove B2 and the axial outer wall D1 of the scroll 11. The fourth curvature radius R4 of the transition outer wall D2 of the scroll 11 and the second curvature radius R2 of the second curved surface b21 of the second curved groove B2 may satisfy the following relationship: R4 = 0.6*R2 ~ 0.8*R2. By connecting the second curved surface b21 and the shaft outer wall D1 through the transition outer wall D2, the flexible display panel 12 can be smoothly transitioned from the accommodating groove C1 to the outside of the scroll 11, and can be gently bent between the accommodating groove C1 and the shaft outer wall D1, thereby avoiding the problem of stress concentration at the junction of the bent connecting portion 122 and the rolled display portion 121, and further reducing the risk of breakage and failure of the flexible display panel 12.

[0106] Please refer to Fig.12 and Fig.13 , Fig.12 is a schematic structural diagram of another display device 10 provided in an embodiment of the utility model. Fig.13 yes Fig.12The structural schematic diagram of the scroll 11 in the display device 10 shown in the figure, in an optional embodiment, the first curved surface b11 of the first curved groove B1 and the second curved surface b21 of the second curved groove B2 are tangent, so that a smooth transition can be achieved between the forward bending portion 1224 located in the second curved groove B2 and the reverse bending portion 1225 located in the first curved groove B1, so that the bending connection portion 122 can change the bending direction more smoothly during the bending process, which can avoid the problem of stress concentration on the bending connection portion 122, and can further reduce the risk of fracture failure of the flexible display panel 12.

[0107] Exemplarily, the bending angle of the first curved surface b11 of the first curved groove B1 can be 160° to 180°, and the bending angle range of the second curved surface b21 of the second curved groove B2 can be 160° to 180°. Exemplarily, the bending angle of the first curved surface b11 of the first curved groove B1 can be 160°, 168°, 172°, 177° or 180°, and the bending angle of the second curved surface b21 of the second curved groove B2 can be 160°, 165°, 172°, 175° or 180°. Since the first curved groove B1 is used to define the bending shape of the reverse bending portion 1225, and the second curved groove B2 is used to define the bending shape of the forward bending portion 1224, the bending angle range of the forward bending portion 1224 can be 160° to 180°, and the bending angle of the reverse bending portion 1225 can be 180°.

[0108] At least one of the forward bending portion 1224 and the reverse bending portion 1225 can be bonded to the first groove wall c11 and the second groove wall c12 of the accommodating groove C1. By tangent to the first curved surface b11 of the first curved groove B1 and the second curved surface b21 of the second curved groove B2, the bonding area between the curved connecting portion 122 and the accommodating groove C1 can be increased, thereby improving the connection stability between the flexible display panel 12 and the scroll 11.

[0109] In an optional embodiment, the second curved surface b21 of the second curved groove B2 is connected to the outer wall D1 of the reel 11, and the end of the second curved surface b21 away from the first curved surface b11 is tangent to the outer wall D1. In this way, the flexible display panel 12 can smoothly transition at the first opening k1 of the accommodating groove C1.

[0110] Optionally, the flexible display panel 12 may include multiple film layers, and the multiple film layers may include glue layers and functional layers. Since the strain of the glue layer is greater than the strain of the functional layer during the bending of the flexible display panel 12, in the related art, peeling may occur between adjacent glue layers and functional layers. According to the simulation results, compared with the structure in the related art where the curved connection portion 122 located in the receiving groove C1 is not provided, in the embodiment of the utility model, by setting the bending angle of the reverse bending portion 1225 to 180°, the strain reduction amplitude of the glue layer at the junction of the curved connection portion 122 and the curled display portion 121 is 15% to 25%, and the strain reduction amplitude of the functional layer is 11%. In this way, the bonding effect of the adjacent film layers at the junction of the curved connection portion 122 and the curled display portion 121 can be improved, thereby avoiding peeling between the film layers, and then improving the reliability and yield of the flexible display module.

[0111] Please refer to Figure 5 and Figure 6 In an optional embodiment, the reel 11 may include a first shaft body 111 and a second shaft body 112 fixedly connected. In a first direction h1, the length of the first shaft body 111 and the length of the second shaft body 112 are both greater than the width of the curved connection portion 122. The first direction is a direction parallel to the axis of the reel 11. The first shaft body 111 has a first axial surface 1111 and a second axial surface 1112 opposite to each other along a second direction h2. The second shaft body 112 has a third axial surface 1121 and a fourth axial surface 1122 opposite to each other along the second direction h2. The second direction is a direction perpendicular to the axis of the reel 11. The shapes of the second axial surface 1112 and the third axial surface 1121 may be complementary, and the second axial surface 1112 is the first groove wall c11, the third axial surface 1121 is the second groove wall c12, and the first axial surface 1111 and the fourth axial surface 1122 are spliced ​​into the outer axial wall D1 of the reel 11. It should be noted that in Figure 5 and Figure 6 In the figure, the first direction h1 is a direction perpendicular to the paper surface. It can be understood that the second axial surface 1112 and the third axial surface 1121 in the embodiment of the present invention are complementary in shape, which means complementary within a certain tolerance range.

[0112] The first shaft body 111 and the second shaft body 112 may be bonded, or the first shaft body 111 and the second shaft body 112 may be bolted. Figure 5 and Figure 6As shown, the cross section of the receiving groove C1 between the first shaft body 111 and the second shaft body 112 in the direction perpendicular to the axis of the scroll 11 can be S-shaped. If the bending connection portion 122 in the receiving groove C1 is bent too many times, the curvature radius of part of the bending connection portion 122 will be too small, so that the strain of this part of the bending connection portion 122 will exceed the maximum strain of the rolled display portion 121. In the embodiment of the utility model, by designing the receiving groove C1 to be S-shaped, that is, the receiving groove C1 can make the bending connection portion 122 in the receiving groove C1 bend twice, which can avoid the problem of excessive strain of part of the bending connection portion 122 in the receiving groove C1.

[0113] In an alternative embodiment, Figure 5 and Figure 6 As shown, the curved connection portion 122 located in the accommodating groove C1 is bonded to the first groove wall c11 and the second groove wall c12 respectively. During the manufacturing process of the display device 10, the display surface p1 of the curved connection portion 122 of the flexible display panel 12 can be first fixedly connected (e.g., bonded) to the second axial surface 1112 (i.e., the first groove wall c11) of the first shaft body 111, and then the third axial surface 1121 (i.e., the second groove wall c12) of the second shaft body 112 is fixedly connected (e.g., bonded) to the back surface p2 of the curved connection portion 122, and then the first shaft body 111 and the second shaft body 112 are fixedly connected.

[0114] Please refer to Fig.14 and Fig.15 , Fig.14 is a schematic structural diagram of another display device 10 provided in an embodiment of the utility model. Fig.15 yes Fig.14 The schematic diagram of the structure of the scroll 11 in the display device 10 shown in the figure, in an optional embodiment, the scroll 11 may include a first shaft body 111 and a second shaft body 112 which are fixedly connected, in a first direction, the length of the first shaft body 111 and the length of the second shaft body 112 are both greater than the width of the curved connection portion 122, and the first direction is a direction parallel to the axis of the scroll 11; the first shaft body 111 may have an inner cavity 1113, and the inner cavity 1113 may penetrate the first shaft body 111 in the length direction of the first shaft body 111, and the length direction of the first shaft body 111 is a direction parallel to the axis of the first shaft body 111. The second shaft body 112 may be located in the inner cavity 1113, and the outer wall of the second shaft body 112 is complementary in shape to the cavity wall of the inner cavity 1113, and the outer wall of the second shaft body 112 is the first groove wall c11, the cavity wall of the inner cavity 1113 is the second groove wall c12, and the outer wall of the first shaft body 111 is the axial outer wall D1 of the scroll 11. It should be noted that in Fig.14 and Fig.15In the figure, the first direction h1 is a direction perpendicular to the paper surface. It can be understood that the shapes of the outer wall of the second shaft body 112 and the cavity wall of the inner cavity 1113 in the embodiment of the utility model are complementary, which means that they are complementary within a certain tolerance range.

[0115] The first shaft 111 and the second shaft 112 may be bonded or bolted. For example, the cross section of the receiving groove C1 between the first shaft 111 and the second shaft 112 in a direction perpendicular to the axis of the reel 11 may be teardrop-shaped.

[0116] like Fig.14 and Fig.15 As shown, the bending angle range of the first curved surface b11 of the first curved groove B1 can be 240° to 300°. For example, the bending angle of the first curved surface b11 of the first curved groove B1 can be 240°, 245°, 255°, 260°, 270°, 285°, 290° or 300°. The bending angle range of the first curved surface b11 of the first curved groove B1 can be 160° to 180°. For example, the bending angle of the second curved surface b21 of the second curved groove B2 can be 160°, 165°, 172°, 175° or 180°. Since the first curved groove B1 is used to define the bending shape of the reverse bending portion 1225, the bending angle range of the reverse bending portion 1225 located in the first curved groove B1 can be 240° to 300°. According to the simulation results, compared with the structure in the related art in which the curved connection portion 122 located in the accommodating groove C1 is not provided, in the embodiment of the utility model, by setting the bending angle of the reverse bending portion 1225 to 240°~300°, the strain reduction amplitude of the glue layer at the junction of the curved connection portion 122 and the curled display portion 121 is 23%~30%. Exemplarily, the strain reduction amplitude of the glue layer at the junction of the curved connection portion 122 and the curled display portion 121 is 27%.

[0117] During the manufacturing process of the display device 10, the curved connection portion 122 of the flexible display panel 12 can be first fixedly connected (e.g., bonded) to the cavity wall of the inner cavity 1113 of the first shaft body 111, and then the second shaft body 112 can be inserted into the inner cavity 1113 of the first shaft body 111, and the first shaft body 111 and the second shaft body 112 can be fixedly connected.

[0118] Please refer to Fig.16 and Fig.17 , Fig.16 is a schematic diagram of a flexible display panel 12 after being unfolded according to an embodiment of the utility model. Fig.17 yes Fig.16The flexible display panel 12 is shown as a schematic diagram of a structure in which the flexible display panel 12 is wound on the reel 11. In an optional embodiment, the thickness of the rolled display portion 121 may be greater than or equal to the thickness of the curved connection portion 122. That is, the flexible display panel 12 may include multiple film layers, and one end of each of the multiple film layers of the flexible display panel 12 may be placed in the receiving groove C1 for reverse bending, or one end of at least one film layer in the flexible display panel 12 may be placed in the receiving groove C1 for reverse bending.

[0119] The multiple film layers of the flexible display panel 12 may include an adhesive layer and a functional layer. Adjacent functional layers may be bonded by the adhesive layer. Since the strain of the adhesive layer is greater than the strain of the functional layer during the bending of the flexible display panel 12, only the film layer adjacent to the adhesive layer with a higher strain among the multiple film layers may be reversely bent in the accommodating groove C1.

[0120] Please refer to Fig.16 and Fig.17 In an optional embodiment, the curled display portion 121 may include a cover layer 1211 (English: Cover), a polarizing layer 1212 (English: Polarizer; abbreviated as: POL), a touch display layer 1213, a back film layer 1214 and a support layer 1215 stacked in sequence; the curved connection portion 122 may include a first structure layer 1221, a second structure layer 1222 and a third structure layer 1223, the first structure layer 1221 and the polarizing layer 1212 are an integrated structure, the second structure layer 1222 and the touch display layer 1213 are an integrated structure, and the third structure layer 1223 and the back film layer 1214 are an integrated structure.

[0121] Exemplarily, if there is a risk of failure of the glue layer between the polarizing layer 1212 and the touch display layer 1213 in the flexible display panel 12, the polarizing layer 1212, the touch display layer 1213, and the glue layer between the polarizing layer 1212 and the touch display layer 1213 can be extended so that the glue layer between the polarizing layer 1212 and the touch display layer 1213 is located in the middle layer during the bending process (the middle layer is subjected to less tensile or compressive force during the bending process), thereby reducing the strain of the glue layer between the polarizing layer 1212 and the touch display layer 1213. The extended part of the polarizing layer 1212 and the extended part of the touch display layer 1213, as well as the glue layer between the extended polarizing layer 1212 and the touch display layer 1213 are used as the curved connection part 122, and the back film layer 1214 can also be extended on the basis of extending the polarizer layer and the touch display layer 1213, and the back film layer 1214 can improve the overall strength of the curved connection part 122. If there is a risk of failure of the adhesive layer between the cover layer 1211 and the polarizing layer 1212, the cover layer 1211, the polarizing layer 1212, and the adhesive layer between the cover layer 1211 and the polarizing layer 1212 may be extended, and the extended portion of the cover layer 1211 and the extended portion of the polarizing layer 1212, as well as the adhesive layer between the extended cover layer 1211 and the polarizing layer 1212 may be used as the curved connecting portion 122. The material of the adhesive layer between the cover layer 1211 and the polarizing layer 1212 may include an optically clear adhesive (OCA), and the material of the cover layer 1211 may include polyethylene glycol terephthalate (PET).

[0122] Please refer to Fig.18 and Fig.19 , Fig.18 is a schematic diagram of simulation results of a flexible display panel 12 in the related art, Fig.19 It is a schematic diagram of simulation results of a flexible display panel 12 provided in an embodiment of the present utility model. Fig.18 The simulation results of the flexible display panel 12 shown can be Figure 2 The simulation result diagram of the flexible display panel 12 in the display device 10 shown in FIG. Fig.18 It can be seen that one end of the flexible display panel 22 has a fixing portion 221, and the fixing portion 221 can be directly fixedly bonded to the outer wall of the scroll 21, and the position σ of the maximum strain value of the flexible display panel 22 is at the junction of the fixing portion 221 and the rolled display portion 222. Fig.19It can be seen that after the curved connection portion 122 of the flexible display panel 12 is placed in the receiving groove C1, since the bending direction of the partially curved connection portion 122 located in the receiving groove C1 is opposite to the bending direction of the rolled display portion 121, the dislocation direction of the film layer in the partially curved connection portion 122 can be opposite to the dislocation direction of multiple film layers in the rolled display portion 121, thereby reducing the film layer strain of the flexible display panel 12 when rolled, and improving the quality of the flexible display panel 12. In addition, the position σ of the maximum strain value of the flexible display panel 12 is transferred from the junction of the fixed portion 221 and the rolled display portion 222 to the junction of the rolled display portion 121 and the flat display portion 124, and combined with the above description, the maximum strain value σ can also be reduced. For example, as Fig.17 As shown, the polarizing layer 1212, the touch display layer 1213 and the back film layer 1214 are extended, and bent and reversely bent in the receiving groove C1 of the reel 11. Compared with the maximum strain value in the related art, the maximum strain value of the glue layer between the polarizing layer 1212 and the touch display layer 1213 in the embodiment of the utility model is reduced by 10% to 20%. At the same time, the strain of the touch display layer 1213 can also be reduced. The strain reduction of the touch display layer 1213 is 6% to 10%. For example, the strain reduction of the touch display layer 1213 is 8%. In this way, the strain of the flexible display panel 12 when bent can be reduced, the anti-bending performance of the flexible display panel 12 can be improved, and the curling radius of the curling display part 121 of the flexible display panel 12 (that is, the radius of the reel 11) can be reduced, so as to improve the display effect of the display device 10 while realizing the miniaturization of the display device 10.

[0123] Please refer to Fig. 20 , Fig. 20 : is a schematic diagram of the structure of another display device 10 provided by an embodiment of the utility model. In an optional implementation, the flexible display panel 12 may further include an extended fixing portion 123 extending from the edge of the curved connection portion 122 away from the rolled display portion 121; the accommodating groove C1 may also have a second opening k2 opposite to the first opening k1, and at least part of the extended fixing portion 123 may be located outside the accommodating groove C1 via the second opening k2, and fixedly connected to the axial outer wall D1 of the scroll 11. Exemplarily, the extended fixing portion 123 may be bonded to the axial outer wall D1 of the scroll 11. In this way, the curved connection portion 122 located in the accommodating groove C1 may not be bonded to the first groove wall c11 and the second groove wall c12 of the accommodating groove C1, and the bending direction of the curved connection portion 122 located in the accommodating groove C1 is limited only by the first groove wall c11 and the second groove wall c12 of the accommodating groove C1. The flexible display panel 12 and the reel 11 are fixedly connected outside the axis by extending the fixing portion 123 , which can reduce the manufacturing difficulty of the display device 10 compared with the connection method of fixing inside the axis.

[0124] The extended fixing portion 123 can extend from the second edge of the curved connection portion 122, the second edge can be parallel to the length direction of the second opening k2, and the second edge of the curved connection portion 122 can be parallel to the first edge of the curled display portion 121, and the length direction of the second opening k2 can be a direction parallel to the axis of the scroll 11.

[0125] In an optional embodiment, the thickness of the curved connection portion 122 is greater than or equal to the thickness of the extended fixing portion 123. That is, the multiple film layers of the curved connection portion 122 may be extended to the outside of the second opening k2 to form the extended fixing portion 123, or at least one film layer of the curved connection portion 122 may be extended to the outside of the second opening k2 to form the extended fixing portion 123.

[0126] Please refer to Fig.21 and Fig. 22 , Fig.21 is a schematic structural diagram of another display device 10 provided in an embodiment of the utility model. Fig. 22 yes Fig.21 The schematic diagram of the unfolding of the flexible display panel 12 in the display device 10 shown in the figure, in an optional embodiment, the curled display part 121 may include a cover layer 1211, a polarizing layer 1212, a touch display layer 1213, a back film layer 1214 and a support layer 1215 stacked in sequence; the curved connection part 122 includes a first structure layer 1221, a second structure layer 1222 and a third structure layer 1223, the first structure layer 1221 and the polarizing layer 1212 are an integral structure, the second structure layer 1222 and the touch display layer 1213 are an integral structure, and the third structure layer 1223 and the back film layer 1214 are an integral structure; the extended fixed part 123 includes a fourth structure layer 1231, and the fourth structure layer 1231 is at least an integral structure with the third structure layer 1223. That is, the extended fixed part 123 can be a single-layer film structure, and the extended fixed part 123 can be an integral structure with the back film layer 1214. The material of the back film layer 1214 may include polyethylene terephthalate or polyimide (English: Polyimide; abbreviated: PI). In this way, the fixed extension part can be set in a single-layer structure to reduce the influence of the fixed extension part attached to the shaft outer wall D1 of the reel 11 on the rolled display part 121 wound on the reel 11.

[0127] Of course, in an optional embodiment, the extended fixing portion 123 may also be a multi-layer film layer structure. For example, the extended fixing portion 123 may include a stacked fourth structure layer, a fifth structure layer and a sixth structure layer. The fourth structure layer and the third structure layer are an integral structure, the fifth structure layer and the second structure layer are an integral structure, and the sixth structure layer and the first structure layer are an integral structure. The embodiment of the utility model does not limit the number of film layers of the extended fixing portion 123.

[0128] In an optional embodiment, the bending angle range of the extension fixing portion 123 may be 40° to 50°. For example, the bending angle of the extension fixing portion 123 may be 40°, 42°, 45°, 48° or 50°. Within this range, it is possible to avoid the extension fixing portion 123 being too small to affect the fixing effect between the flexible display panel 12 and the scroll 11, and it is also possible to avoid the extension fixing portion 123 being too large to affect the curled display portion 121.

[0129] Please refer to Fig.23 , Fig.23 It is a structural schematic diagram of another display device 10 provided by an embodiment of the utility model. In an optional implementation, a first step 113 may be provided on the outer wall of the scroll 11, and one end of the curved connection portion 122 extends out of the first opening k1 and is connected to the curled display portion 121; the first step 113 includes a first table top 1131, a first bottom surface 1132 and a first side surface 1133 connecting the first table top 1131 and the first bottom surface 1132. When the display device 10 is in a retracted state, the curved connection portion 122 may be located on the first table top 1131, and the curled display portion 121 may be located on the first bottom surface 1132.

[0130] Please refer to Fig.23 and Fig.24 , Fig.24 It is a schematic diagram of the structure of another display device 20. When the thickness of the curved connection part 122 and the rolled display part 121 are different, there is a step difference at the junction of the two. The position of the step difference will cause the risk of stress concentration at the junction of the curved connection part 122 and the rolled display part 121. In the embodiment of the utility model, by providing a first step 113 that matches the step difference between the curved connection part 122 and the rolled display part 121, it is possible to avoid the phenomenon of stress concentration at the junction of the curved connection part 122 and the rolled display part 121 when the display device 10 is in a retracted state. In the direction perpendicular to the axis of the scroll 11, the arc length L1 of the cross section of the first table 1131 of the first step 113 is equal to the arc length L2 of the cross section of the portion of the curved connection part 122 extending out of the first opening k1 of the accommodating groove C1. It should be noted that the arc length L1 of the cross section of the first table 1131 of the first step 113 in the embodiment of the utility model is equal to the arc length L2 of the cross section of the portion of the curved connection portion 122 extending out of the first opening k1 of the accommodating groove C1, which means they are equal within a certain tolerance range.

[0131] In an optional embodiment, the height of the first step 113 is consistent with the thickness of the support layer 1215. The first step 113 is filled by the end of the support layer 1215, so that no height difference is formed between the back surface p2 of the flexible display panel 12 and the axial outer wall D1 of the reel 11, and thus when the flexible display panel 12 is rolled up on the reel 11, stress concentration is avoided at the junction of the curved connection portion 122 and the rolled display portion 121, thereby reducing damage to the flexible display panel 12.

[0132] In an optional embodiment, the display device 10 may further include: a driving component, the driving component may be connected to the housing, and the driving component may be configured to: drive the scroll 11 to rotate relative to the housing. In this case, by setting the driving component in the display device 10, the driving component can drive the scroll 11 to rotate, which effectively improves the user's experience. In the utility model, the display device 10 may also include: a control component (not shown in the figure), the control component is connected to the driving component, and the user can control the driving component to drive the scroll 11 to rotate through the control component.

[0133] In addition, the display device 10 in the embodiment of the utility model can be any product or component with display and scrolling functions, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, etc.

[0134] In summary, the embodiment of the utility model provides a display device including a scroll and a flexible display panel. When the scroll in the display device rotates, the scroll can drive the rolled display portion in the flexible display panel to roll on the scroll, so that the size of the area of ​​the flexible display panel used to display the picture is reduced, thereby making it easy to carry. In addition, by bending part of the bent connection portion in the receiving groove in the opposite direction relative to the rolled display portion wound on the scroll, the bent connection portion can play a role in reducing the bending stress of the rolled display portion, so as to reduce the strain of the rolled display portion when rolling, reduce the probability of failure of the flexible display panel, and improve the display effect of the flexible display panel after repeated winding.

[0135] The term "at least one of A and B" in the present invention is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, at least one of A and B may represent three situations: A exists alone, A and B exist at the same time, and B exists alone.

[0136] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It is also understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it is understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it may be the only layer between the two layers or two elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0137] In the present invention, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more, unless otherwise clearly defined.

[0138] The above description is only an optional embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A display device, characterized in that: include: A reel, the reel having a receiving groove, the receiving groove having a first opening; A flexible display panel, the flexible display panel having a display surface and a back surface opposite to each other, the flexible display panel comprising: a rollable display portion and a curved connection portion extending from an edge of the rollable display portion, the rollable display portion being capable of being rolled up on the reel, at least a portion of the curved connection portion being located in the accommodating groove via the first opening, and the curved connection portion being connected to the reel; The accommodating groove is configured to limit the bending direction of the curved connecting portion located in the accommodating groove, the protruding direction of the partial curved connecting portion located in the accommodating groove is a first protruding direction, the protruding direction of the rolled display portion wound on the reel is a second protruding direction, one of the first protruding direction and the second protruding direction is the direction in which the display surface approaches the back surface, and the other protruding direction is the direction in which the display surface moves away from the back surface.

2. The display device according to claim 1, characterized in that The accommodating groove has a first groove wall and a second groove wall opposite to each other, at least a portion of the display surface of the curved connecting portion is in contact with the first groove wall, and at least a portion of the back surface of the curved connecting portion is in contact with the second groove wall; Alternatively, at least a portion of the back surface of the curved connection portion is in contact with the first groove wall, and at least a portion of the display surface of the curved connection portion is in contact with the second groove wall.

3. The display device according to claim 1, characterized in that The accommodating groove includes a first curved groove and a second curved groove, wherein a first end of the second curved groove is connected to the first curved groove, a second end of the second curved groove is connected to the first opening, the first curved groove has two opposite first curved surfaces, and the second curved groove has two opposite second curved surfaces; The protruding direction of the curved connection portion located in the second curved groove is the second protruding direction; The protruding direction of the curved connection portion located in the first curved groove is the first protruding direction.

4. The display device according to claim 3, characterized in that: The reel has an outer wall, and the first curved surface, the second curved surface and the outer wall satisfy the following relationship: R3≤R2<R1; Wherein, R1 is the first curvature radius of the outer wall of the shaft, R2 is the second curvature radius of the second curved surface, and R3 is the third curvature radius of the first curved surface.

5. The display device according to claim 3, characterized in that: The accommodating groove further includes a strip groove, and two ends of the strip groove are respectively connected to the first curved groove and the second curved groove; The strip-shaped groove has two opposite strip-shaped surfaces, and two ends of the strip-shaped surfaces are tangent to the first curved surface and the second curved surface respectively.

6. The display device according to claim 3, characterized in that: The first curved surface and the second curved surface are tangent to each other.

7. The display device according to claim 6, characterized in that: The second curved surface of the second curved groove is connected to the outer wall of the reel, and one end of the second curved surface away from the first curved surface is tangent to the outer wall of the shaft.

8. The display device according to claim 2, characterized in that: The reel comprises a first shaft body and a second shaft body that are fixedly connected, and in a first direction, the length of the first shaft body and the length of the second shaft body are both greater than the width of the curved connection portion, and the first direction is a direction parallel to the axis of the reel; The first shaft body has a first axial surface and a second axial surface opposite to each other along a second direction, and the second shaft body has a third axial surface and a fourth axial surface opposite to each other along the second direction, wherein the second direction is a direction perpendicular to the axis of the reel; The second axial surface and the third axial surface are complementary in shape, and the second axial surface is the first groove wall, the third axial surface is the second groove wall, and the first axial surface and the fourth axial surface are spliced ​​to form the outer wall of the reel.

9. The display device according to claim 2, characterized in that: The reel comprises a first shaft body and a second shaft body that are fixedly connected, and in a first direction, the length of the first shaft body and the length of the second shaft body are both greater than the width of the curved connection portion, and the first direction is a direction parallel to the axis of the reel; The first shaft body has an inner cavity, the second shaft body is located in the inner cavity, the outer wall of the second shaft body is complementary to the shape of the cavity wall of the inner cavity, the outer wall of the second shaft body is the first groove wall, the cavity wall of the inner cavity is the second groove wall, and the outer wall of the first shaft body is the outer wall of the shaft of the reel.

10. The display device according to claim 2, characterized in that: One end of the curved connection portion away from the rolled display portion is connected to one end of the accommodating groove away from the first opening.

11. The display device according to claim 2, characterized in that: The curved connection portion located in the accommodating groove is bonded to the first groove wall and the second groove wall respectively.

12. The display device according to claim 1, characterized in that: The thickness of the rolled display portion is greater than or equal to the thickness of the bent connection portion.

13. The display device according to claim 12, characterized in that: The curled display part comprises a cover layer, a polarizing layer, a touch display layer, a back film layer and a support layer stacked in sequence; The curved connection portion includes a first structure layer, a second structure layer and a third structure layer, the first structure layer and the polarizing layer are an integral structure, the second structure layer and the touch display layer are an integral structure, and the third structure layer and the back film layer are an integral structure.

14. The display device according to claim 1, characterized in that The flexible display panel further includes an extending fixing portion extending from the curved connecting portion away from an edge of the rolled display portion; The accommodating groove further has a second opening opposite to the first opening, and at least a portion of the extending fixing portion is located outside the accommodating groove via the second opening and is fixedly connected to the outer wall of the reel.

15. The display device according to claim 14, characterized in that: The thickness of the bent connection portion is greater than or equal to the thickness of the extended fixing portion.

16. The display device according to claim 14, characterized in that: The curled display part comprises a cover layer, a polarizing layer, a touch display layer, a back film layer and a support layer stacked in sequence; The curved connection portion includes a first structure layer, a second structure layer and a third structure layer, the first structure layer and the polarizing layer are an integrated structure, the second structure layer and the touch display layer are an integrated structure, and the third structure layer and the back film layer are an integrated structure; The extending fixing portion includes a fourth structural layer, and the fourth structural layer is at least an integral structure with the third structural layer.

17. The display device according to claim 14, characterized in that: The bending angle range of the extending fixing portion is 40° to 50°.

18. The display device according to claim 13, characterized in that: The outer wall of the scroll is provided with a first step, and one end of the curved connection portion extends out of the first opening and is connected to the curled display portion; The first step includes a first table top, a first bottom surface, and a first side surface connecting the first table top and the first bottom surface. The curved connection portion is located on the first table top, and the rolled display portion is located on the first bottom surface.

19. The display device according to claim 18, characterized in that The height of the first step is consistent with the thickness of the support layer.

20. The display device according to claim 3, characterized in that: The curved connection portion includes a forward curved portion and a reverse curved portion connected away from the curled display portion, the forward curved portion is located in the second curved groove, and the reverse curved portion is located in the first curved groove; The forward curved portion is respectively fitted with the two second curved surfaces of the second curved groove, and the reverse curved portion is respectively fitted with the first curved surface of the first curved groove; The bending angle range of the forward bending portion is 70° to 100°, and the bending angle range of the reverse bending portion is 70° to 100°.

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