Curled display module and display device

Abstract

The invention discloses a curled display module and a display device. The curled display module and the display device are used for avoiding failure of the curled display module. The embodiment of the invention provides a curled display module. The curled display module comprises a flexible display panel, a first reel connected with the flexible display panel and a first guide shaft located on one side of the first reel in the first direction. The flexible display panel comprises a curling area and a first connecting area located on one side of the curling area. The first connecting area is in curled connection with the first reel; the first guide shaft is in sliding contact with the curling area.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a curled display module and a display device. Background Art

[0002] Currently, display devices can use flexible display panels as display screens. Compared with traditional display panels, flexible display panels have advantages such as deformability, bendability and good flexibility, and can be applied to curled display products.

[0003] In rollable display products, the flexible display panel is wound around a reel via its flexible portion, allowing it to rotate relative to the reel to achieve a variety of display areas. However, the flexible display panel needs to be fixed to the reel, and stress concentration is prone to occur at the junction of the module's fixed area and the rollable area. This area is prone to module failure, affecting the user experience. Summary of the Invention

[0004] Embodiments of the present application provide a rollable display module and a display device to prevent the rollable display module from failing.

[0005] An embodiment of the present application provides a rollable display module, comprising: a flexible display panel, a first scroll connected to the flexible display panel, and a first guide shaft located on one side of the first scroll in a first direction;

[0006] The flexible display panel includes: a curling area, a first connection area located on one side of the curling area;

[0007] The first connecting area is curled and connected to the first reel;

[0008] The first guide shaft is in sliding contact with the curling area.

[0009] In some embodiments, a cross section of the first scroll perpendicular to its rotation axis and a cross section of the first guide axis perpendicular to its rotation axis are circular;

[0010] The radius of the first scroll is a first radius, the radius of the first guide axis is a second radius, and the first radius r1 is smaller than the second radius r2;

[0011] The first reel and the first guide axis are arranged along a first direction; a minimum distance between the first reel and the first guide axis in the first direction is greater than 0 and less than or equal to 5 mm.

[0012] In some embodiments, the rollable display module further comprises: a first positioning shaft in sliding contact with the rollable area; the first positioning shaft is located on a side of the first guide shaft away from the first rollable shaft in the first direction, and the first positioning shaft and the first guide shaft are respectively located on two sides of the flexible display panel;

[0013] The radius of the first positioning axis is smaller than the radius of the first scrolling axis.

[0014] In some embodiments, the connection surface between the first scrolling shaft and the first connection area and the contact surface between the first guide shaft and the curling area are located on the same surface of the flexible display panel;

[0015] The rotation axis of the first scroll is located in a first plane parallel to the first direction;

[0016] The rotation axis of the first guide axis is located in the first plane; or, the rotation axis of the first guide axis is located between the first plane and the curling area, and the distance h1 from the rotation axis of the first guide axis to the first plane satisfies: h1<0.5r1.

[0017] In some embodiments, the rollable display module includes a first positioning axis; a radius r3 of the first positioning axis is less than 0.5r1;

[0018] The first scroll comprises a first top surface and a first bottom surface, wherein the first top surface and the first bottom surface are respectively located on two sides of the first plane;

[0019] The first positioning shaft includes a second top surface and a second bottom surface;

[0020] The connecting surface between the first scrolling axis and the first connecting area and the contact surface between the first guide axis and the curling area are located on the same surface of the flexible display panel; the second top surface, the second bottom surface, and the first top surface are located on the same side of the first plane, and the distance between the second top surface and the first plane is greater than the distance between the second bottom surface and the first plane;

[0021] A distance h2 from the first top surface to the first plane and a distance h3 from the second bottom surface to the first plane satisfy: h2-h3<0.5r1.

[0022] In some embodiments, the connection surface between the first scroll axis and the first connection area and the contact surface between the first guide axis and the curling area are located on different surfaces of the flexible display panel;

[0023] An angle between a portion of the curling zone located between the first scroll axis and the first guide axis and the first direction is greater than or equal to 20° and less than or equal to 40°.

[0024] In some embodiments, the rollable display module includes a first positioning axis, and a radius r3 of the first positioning axis is less than 0.5r1;

[0025] An angle between a portion of the curling area located between the first guide axis and the first positioning axis and the first direction is greater than or equal to 0° and less than or equal to 25°.

[0026] In some embodiments, the flexible display panel includes: a support layer, and a display function layer located on one side of the support layer in the curling area; a first scroll is connected to the support layer;

[0027] The support layer includes: at least one sub-support layer; the sub-support layer includes: a first sub-region located in the first connection region, a second sub-region located on one side of the first sub-region in the first direction and in the curling region, and a plurality of transition regions located between the first sub-region and the second sub-region; at least in the second sub-region and the plurality of transition regions, the sub-support layer includes a plurality of strip-shaped openings extending along a second direction; the second direction intersects the first direction;

[0028] The length of the strip opening is a first length, the width of the strip opening is a first width, the distance between two adjacent strip openings in the first direction is a first distance, and the distance between two adjacent strip openings in the second direction is a second distance;

[0029] At least one of the first lengths, first widths, first distances, and second distances in the multiple transition zones is different, and at least one of the first lengths, first widths, first distances, and second distances in the multiple transition zones increases or decreases sequentially.

[0030] In some embodiments, the first length of the transition zone closer to the first sub-region is less than the first length of the transition zone closer to the second sub-region; the first width of the transition zone closer to the first sub-region is less than or equal to the first width of the transition zone closer to the second sub-region; the first distance of the transition zone closer to the first sub-region is greater than or equal to the first distance of the transition zone closer to the second sub-region; and the second distance of the transition zone closer to the first sub-region is greater than or equal to the second distance of the transition zone closer to the second sub-region.

[0031] In some embodiments, the first length of the transition zone is less than or equal to the first length of the second sub-region; the first width of the transition zone is less than or equal to the first width of the second sub-region; the first distance of the transition zone is greater than or equal to the first distance of the second sub-region; and the second distance of the transition zone is greater than or equal to the second distance of the second sub-region.

[0032] In some embodiments, the at least one sub-supporting layer includes: a first sub-supporting layer, and a second sub-supporting layer located between the first sub-supporting layer and the display function layer;

[0033] The first length of the first sub-support layer is greater than the first length of the second sub-support layer, the first width of the first sub-support layer is greater than the first width of the second sub-support layer, the first distance of the first sub-support layer is greater than the first distance of the second sub-support layer, and the second distance of the first sub-support layer is greater than the second distance of the second sub-support layer.

[0034] In some embodiments, the plurality of transition regions included in the first sub-support layer are a plurality of first transition regions; the plurality of transition regions included in the second sub-support layer are a plurality of second transition regions; the number of the first transition regions is equal to the number of the second transition regions;

[0035] The first transition area and the second transition area are both located in the curling area, and the first transition area corresponds to the second transition area one by one.

[0036] In some embodiments, the plurality of transition regions included in the first sub-support layer are a plurality of first transition regions; the plurality of transition regions included in the second sub-support layer are a plurality of second transition regions; the number of the first transition regions is equal to the number of the second transition regions;

[0037] Part of the first transition zone is located in the first connecting zone, and the remaining parts of the first transition zone and the second transition zone are located in the curling zone. The first transition zone and the second transition zone located in the curling zone overlap.

[0038] In some embodiments, the first scroll includes: a first sub-scroll and a second sub-scroll; the surface of the first sub-scroll and the surface of the second sub-scroll are both hemispherical;

[0039] The first connecting area covers the first sub-reel and is connected to the first sub-reel, and the first connecting area does not contact the hemispherical surface of the second sub-reel;

[0040] The radius of the first sub-scroll is smaller than the radius of the second sub-scroll; the center of the first sub-scroll is located on the side of the display surface when the center of the second sub-scroll is facing the unfolded state of the curling area, the thickness T1 of the first connecting area, the radius r11 of the first sub-scroll, and the radius r12 of the second sub-scroll satisfy: r12-r11=0.5×T1, and the distance h4 between the center of the first sub-scroll and the center of the second sub-scroll is 0.5×T1.

[0041] A display device provided in an embodiment of the present application includes the curled display module provided in an embodiment of the present application.

[0042] The curling display module and display device provided in the embodiments of the present application include a first guide shaft, which is in sliding contact with the curling area of ​​the flexible display panel, thereby supporting the curling area of ​​the flexible display panel, avoiding the problem of damage and failure of the flexible display panel caused by stress concentration at the junction of the curling area and the first connection area, and can extend the service life of the curling display module and improve user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0044] Figure 1 A structural diagram of a rollable display module provided in an embodiment of the present application;

[0045] Figure 2 A schematic structural diagram of another rollable display module provided in an embodiment of the present application;

[0046] Figure 3 A schematic structural diagram of another rollable display module provided in an embodiment of the present application;

[0047] Figure 4 A schematic structural diagram of another rollable display module provided in an embodiment of the present application;

[0048] Figure 5 A schematic structural diagram of another rollable display module provided in an embodiment of the present application;

[0049] Figure 6 A schematic structural diagram of another rollable display module provided in an embodiment of the present application;

[0050] Figure 7 A schematic structural diagram of another rollable display module provided in an embodiment of the present application;

[0051] Figure 8 A schematic structural diagram of another rollable display module provided in an embodiment of the present application;

[0052] Figure 9 A schematic structural diagram of another rollable display module provided in an embodiment of the present application;

[0053] Figure 10 A schematic structural diagram of another rollable display module provided in an embodiment of the present application;

[0054] Figure 11 A schematic structural diagram of another rollable display module provided in an embodiment of the present application;

[0055] Figure 12 A structural diagram of another curled display module provided in an embodiment of the present application. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. And in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. Based on the described embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0057] Unless otherwise defined, the technical or scientific terms used in this application should have the usual meaning understood by people with ordinary skills in the field to which this application belongs. The words "first", "second" and similar terms used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0058] It should be noted that the sizes and shapes of the figures in the accompanying drawings do not reflect the actual scale and are only for the purpose of illustrating the contents of this application. The same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions.

[0059] In the related art, a rollable flexible display panel is wound around a reel through its flexible part. The flexible display panel is divided into a fixed area connected to the reel and a roll-up area. Since the roll-up area has no support, stress concentration problems are prone to occur at the junction of the fixed area and the roll-up area. The display panel is prone to failure at this junction, affecting the life of the display panel.

[0060] The embodiment of the present application provides a rollable display module, such as Figure 1 As shown, the rollable display module includes: a flexible display panel 1, a first scroll 2 connected to the flexible display panel 1, and a first guide shaft 3 located on one side of the first scroll 2 in a first direction X;

[0061] The flexible display panel 1 includes: a curling area A2, a first connection area A1 located on one side of the curling area A2;

[0062] The first connecting area A1 is curled and connected to the first reel 2;

[0063] The first guide shaft 3 is in sliding contact with the curling area A2.

[0064] The curling display module provided in the embodiment of the present application includes a first guide shaft, which is in sliding contact with the curling area of ​​the flexible display panel, thereby supporting the curling area of ​​the flexible display panel, avoiding the problem of damage and failure of the flexible display panel caused by stress concentration at the junction of the curling area and the first connection area, and can increase the service life of the curling display module and enhance user experience.

[0065] In some embodiments, as Figure 2 As shown, the flexible display panel 1 includes: a support layer 101, and a display function layer 102 located on one side of the support layer 101 in the curling area A2;

[0066] The first reel 2 is connected to the support layer 101;

[0067] The supporting layer 101 includes at least one sub-supporting layer 1011 .

[0068] In some embodiments, the side of the display function layer facing away from the support layer further includes a polarizing layer and a cover layer that are sequentially arranged.

[0069] In some embodiments, the display function layer is, for example, a liquid crystal cell or an electroluminescent display function layer, the liquid crystal cell includes a touch electrode, or the display function layer further includes a touch function layer on a side facing away from the support layer.

[0070] In some embodiments, as Figure 2 As shown, only the first connection area A1 includes the display function layer 102 , and both the curling area A2 and the first connection area A1 include the support layer 101 .

[0071] When the flexible display panel further includes a polarizing layer, a cover layer, and a touch function layer, the polarizing layer, the cover layer, and the touch function layer are also only located in the first connection area.

[0072] In some embodiments, as Figure 2 As shown, at least one sub-support layer 1011 includes: a first sub-support layer 1011-1, and a second sub-support layer 1011-2 located between the first sub-support layer 1011-1 and the display function layer 102; the support layer 101 also includes: a bonding layer 1012 located between the first sub-support layer 1011-1 and the second sub-support layer 1011-2.

[0073] In the rollable display module provided in the embodiment of the present application, the design of the first guide axis can reduce the strain of the film layer of the flexible display panel at the junction of the first connection area and the rollable area by 16%, among which the strain of the adhesive layer in the support layer is reduced by 12%, thereby reducing the risk of failure of the rollable display module.

[0074] It should be noted that Figure 2 Taking the unfolded state of the flexible display panel when not connected to the first scroll as an example, the length of the support layer 101 in the curling area A2 is π×r1, where r1 is the radius of the first scroll.

[0075] In the rollable display module provided by the present invention, only the support layer extends to the rollable region and connects to the first scroll, thereby maximizing the display area of ​​the flexible display panel. The length of the support layer in the rollable region is π×r1, making it easier to connect the support layer to the first scroll.

[0076] In some embodiments, as Figure 1As shown, the cross section of the first reel 2 perpendicular to its rotation axis (ie, the first rotation axis Z1 ) and the cross section of the first guide shaft 3 perpendicular to its rotation axis (ie, the second rotation axis Z2 ) are circular.

[0077] In some embodiments, as Figure 1 As shown, the radius of the first reel 2 is a first radius r1 , the radius of the first guide axis 3 is a second radius r2 , and the first radius r1 is smaller than the second radius r2 .

[0078] In the curled display module provided by the embodiment of the present application, the first radius is smaller than the second radius, thereby avoiding strain concentration at the contact point between the first guide axis and the curling area, thereby avoiding damage and failure of the flexible display panel.

[0079] In some embodiments, as Figure 1 As shown, the first reel 2 and the first guide axis 3 are arranged along the first direction X;

[0080] A minimum distance h5 between the first reel 2 and the first guide axis 3 in the first direction X is greater than 0 and less than or equal to 5 millimeters (mm).

[0081] In the curling display module provided by the embodiment of the present application, the minimum distance h5 between the first scroll axis and the first guide axis is greater than 0 and less than or equal to 5 mm, thereby further avoiding strain concentration at the contact point between the first guide axis and the curling area, thereby avoiding damage and failure of the flexible display panel.

[0082] In some embodiments, as Figure 1 As shown, the connection surface between the first scroll axis 2 and the first connection area A1 and the contact surface between the first guide axis 3 and the curling area A2 are located on the same surface of the flexible display panel 1 .

[0083] In some embodiments, as Figure 1 As shown, the flexible display panel 1 includes a front surface C1 and a back surface C2; ​​the front surface C1 and the back surface C2 are opposite to each other, and the front surface C1 is the light emitting surface of the flexible display panel 1;

[0084] The first reel 2 is connected to the back surface C2 of the first connection area A1, and the first guide shaft 3 is in contact with the back surface C2 of the curling area A2.

[0085] In some embodiments, as Figure 1 As shown, the rotation axis of the first reel 2 (ie, the first rotation axis Z1 ) is located in a first plane 9 parallel to the first direction X.

[0086] In some embodiments, as Figure 1 As shown, the rotation axis of the first guide shaft 3 (ie, the second rotation axis Z2 ) is located in the first plane 9 .

[0087] Alternatively, in some embodiments, Figure 3As shown, the rotation axis of the first guide axis 3 (ie, the second rotation axis Z2) is located between the first plane 9 and the curling area A2, and the distance h1 from the rotation axis of the first guide axis 3 (ie, the second rotation axis Z2) to the first plane 9 satisfies: h1<0.5r1.

[0088] That is, when the connection surface between the first scroll and the first connection area and the contact surface between the first guide axis and the curling area are located on the same surface of the flexible display panel, the distance between the rotation axis of the first guide axis 3 (that is, the second rotation axis) and the first plane is greater than or equal to 0 and less than or equal to 0.5r1, thereby further avoiding strain concentration at the contact point between the first guide axis and the curling area, thereby avoiding damage and failure of the flexible display panel.

[0089] In some embodiments, as Figure 4 As shown, the connection surface between the first scroll axis 2 and the first connection area A1 and the contact surface between the first guide axis 3 and the curling area A2 are located on different surfaces of the flexible display panel 1 .

[0090] In the rollable display module provided by the present invention, the first scroll axis and the first guide axis are located on different sides of the flexible display panel, thereby reducing the height of the flexible display panel's arch and avoiding an unsightly appearance. When the flexible display panel is a touch display panel, this also avoids touch screen occlusion caused by excessive arching of the flexible display panel.

[0091] In some embodiments, as Figure 4 As shown, the first reel 2 is connected to the back surface C2 of the first connecting area A1, and the first guide shaft 3 is in contact with the front surface C1 of the curling area A2.

[0092] In some embodiments, as Figure 4 As shown, the angle a1 between the curling area A2 located between the first winding axis 2 and the first guide axis 3 and the first direction X is greater than or equal to 20° and less than or equal to 40°.

[0093] In specific implementation, Figure 3 As shown, the size of a1 can be adjusted by adjusting the minimum distance h5 between the first scrolling shaft 2 and the first guide shaft 3 in the first direction X and the downward pressing distance h6 of the flexible display panel 1. h5, h6 and a1 can be designed according to the actual application scenario and the size of the rollable display module.

[0094] In some embodiments, as Figure 5 、 Figure 6 As shown, the curling display module also includes: a first positioning axis 4 that slides in contact with the curling area A2; the first positioning axis 4 is located on the side of the first guide axis 3 away from the first scrolling axis 2 in the first direction X, and the first positioning axis 4 and the first guide axis 3 are respectively located on both sides of the flexible display panel 1.

[0095] In related technologies, when the flexible display panel in the rollable display module is in a rolled-up state for a long time, the film layer of the flexible display panel will produce creep deformation. The creep deformation will slowly recover after the flexible display panel is unfolded, but it cannot be completely recovered. Therefore, an arched curling crease will be generated on the display surface of the flexible display panel.

[0096] The curling display module provided in the embodiment of the present application also includes a first positioning axis, which is in sliding contact with the curling area of ​​the flexible display panel on the side of the first guide axis away from the first curling axis, and the first positioning axis and the first guide axis are respectively located on both sides of the flexible display panel, so that the flexible display panel can bend in the opposite direction during the curling and unfolding process under the action of the first positioning axis and the first guide axis, which can reduce the crease of the flexible display panel.

[0097] It should be noted that Figure 5 In the embodiment, the connection surface between the first scrolling axis 2 and the first connection area A1 and the contact surface between the first guide axis 3 and the curling area A2 are located on the same surface of the flexible display panel 1; Figure 6 In the embodiment, the connection surface between the first scroll axis 2 and the first connection area A1 and the contact surface between the first guide axis 3 and the curling area A2 are located on different surfaces of the flexible display panel 1 .

[0098] It should be noted that after adding the first positioning axis, the fold height of the flexible display panel on the display surface can be reduced by 9%.

[0099] In some embodiments, the positions of the first scrolling shaft, the first positioning shaft, and the first guide shaft are fixed. For example, the rollable display module further includes a fixing member connected to the first scrolling shaft, the first positioning shaft, and the first guide shaft.

[0100] In some embodiments, as Figure 5 、 Figure 6 As shown; the cross section of the first positioning shaft 4 is circular;

[0101] The radius r3 of the first positioning axis 4 is smaller than the radius r2 of the first winding axis 2 .

[0102] In some embodiments, the radius of the first positioning axis r3<0.5r1.

[0103] In some embodiments, as Figure 5 、 Figure 6 As shown, the first reel 2 includes a first top surface 5 and a first bottom surface 6 , and the first top surface 5 and the first bottom surface 6 are respectively located on two sides of the first plane 9 .

[0104] In some embodiments, when the connection surface between the first scroll shaft 2 and the first connection area A1 and the contact surface between the first guide shaft 3 and the curling area A2 are located on the same surface of the flexible display panel 1, as shown in FIG. Figure 5As shown, the first positioning axis 4 includes a second top surface 7 and a second bottom surface 8. The second top surface 7, the second bottom surface 8, and the first top surface 5 are located on the same side of the first plane 9. The distance h3 from the second top surface 7 to the first plane 9 is greater than the distance h2 from the second bottom surface 8 to the first plane 9.

[0105] It should be noted that the first top surface is a plane parallel to the first direction and located at the highest point of the first scrolling axis, and the first bottom surface is a plane parallel to the first direction and located at the lowest point of the first scrolling axis. The second top surface is a plane parallel to the first direction and located at the highest point of the first positioning axis, and the second bottom surface is a plane parallel to the first direction and located at the lowest point of the first positioning axis.

[0106] In some embodiments, as Figure 5 As shown, the distance h2 from the first top surface 5 to the first plane 9 and the distance h3 from the second bottom surface 8 to the first plane 9 satisfy: h2-h3<0.5r1.

[0107] In some embodiments, when the connection surface between the first scroll shaft 2 and the first connection area A1 and the contact surface between the first guide shaft 3 and the curling area A2 are located on different sides of the flexible display panel 1, such as Figure 6 As shown, the angle a2 between the curling area A2 located between the first guide axis 3 and the first positioning axis 4 and the first direction X is greater than or equal to 0° and less than or equal to 25°.

[0108] Among them, such as Figure 7 As shown, when the angle between the curling area A2 located between the first guide axis 3 and the first positioning axis 4 and the first direction X is equal to 0°, the strain of the flexible display panel is the lowest.

[0109] In some embodiments, as Figure 8 As shown, the sub-support layer 1011 includes: a first sub-region B1 located in the first connection area A1, a second sub-region B2 located on one side of the first sub-region B1 in the first direction X and located in the curling area A2, and a plurality of transition areas B3 located between the first sub-region B1 and the second sub-region B2; Figure 9 As shown, at least in a plurality of transition regions B3, the sub-support layer 1011 includes a plurality of strip-shaped openings 11 extending along a second direction Y; the second direction Y intersects the first direction X;

[0110] The length of the strip opening 11 is a first length L1, the width of the strip opening 11 is a first width S1, the distance between two adjacent strip openings 11 in the first direction X is a first distance D1, and the distance between two adjacent strip openings 11 in the second direction Y is a second distance W1;

[0111] At least one of the first length L1, the first width S1, the first distance D1, and the second distance W1 in the multiple transition zones B3 is different, and at least one of the first length L1, the first width S1, the first distance D1, and the second distance W1 in the multiple transition zones B3 increases or decreases sequentially.

[0112] In the curled display module provided in the embodiment of the present application, at least one of the first length L1, the first width S1, the first distance D1, and the second distance W1 in the multiple transition zones increases or decreases sequentially, thereby improving the modulus uniformity of different areas of the flexible display panel and further avoiding stress concentration at the junction of the curled area and the first connection area.

[0113] It should be noted that Figure 8 In the example, a sub-support layer 1011 includes four transition zones B3, and the four transition zones B3 are numbered B3-1, B3-2, B3-3, and B3-4. For the sake of distinction, the first length L1 of B3-1 is recorded as L1 B3-1 , the first width S1 is recorded as S1 B3-1 , the first distance D1 is recorded as D1 B3-1 The second distance W1 is recorded as W1 B3-1 ; The first length L1 of B3-2 is recorded as L1 B3-2 , the first width S1 is recorded as S1 B3-2 , the first distance D1 is recorded as D1 B3-2 The second distance W1 is recorded as W1 B3-2 ; The first length L1 of B3-3 is recorded as L1 B3-3 , the first width S1 is recorded as S1 B3-3 , the first distance D1 is recorded as D1 B3-3 The second distance W1 is recorded as W1 B3-3 ; The first length L1 of B3-4 is recorded as L1 B3-4 , the first width S1 is recorded as S1 B3-4 , the first distance D1 is recorded as D1 B3-4 The second distance W1 is recorded as W1 B3-4 .

[0114] In some embodiments, as Figure 9 As shown, a plurality of strip-shaped openings 11 arranged in the second direction Y form a column, and the strip-shaped openings 11 in two adjacent columns are staggered in the second direction Y.

[0115] It should be noted that Figure 9 Only a partial region in a transition region B3 is shown.

[0116] In some embodiments, in one sub-support layer, the first length L1 of the transition region closer to the first sub-region is smaller than the first length L1 of the transition region closer to the second sub-region; Figure 8 Taking the transition areas B3-1, B3-2, B3-3 and B3-4 as an example, L1 B3-1 ≥L1 B3-2 ≥L1 B3-3 ≥L1 B3-4 ;

[0117] The first width S1 of the transition region closer to the first sub-region is less than or equal to the first width S1 of the transition region closer to the second sub-region; Figure 8 Taking the transition areas B3 in B3-1, B3-2, B3-3 and B3-4 as an example, S1 B3-1 ≥S1 B3-2 ≥S1 B3-3 ≥S1 B3-4 ;

[0118] The first distance D1 of the transition region closer to the first sub-region is greater than or equal to the first distance D1 of the transition region closer to the second sub-region; Figure 8 Taking the transition areas B3-1, B3-2, B3-3 and B3-4 as an example, D1 B3-4 ≥D1 B3-3 ≥D1 B3-2 ≥D1 B3-1 ;

[0119] The second distance W1 of the transition region closer to the first sub-region is greater than or equal to the second distance W1 of the transition region closer to the second sub-region; Figure 8 Taking the transition zones B3-1, B3-2, B3-3 and B3-4 as an example, W1 B3-4 ≥W1 B3-3 ≥W1 B3-2 ≥W1 B3-1 .

[0120] That is, if the first lengths L1 in multiple transition zones are different, the first lengths L1 in the multiple transition zones increase successively in the direction approaching the second sub-zone; if the first widths S1 in the multiple transition zones are different, the first widths S1 in the multiple transition zones increase successively in the direction approaching the second sub-zone; if the first distances D1 in the multiple transition zones are different, the first distances D1 in the multiple transition zones decrease successively in the direction approaching the second sub-zone; if the first distances D1 in the multiple transition zones are different, the second distances W1 in the multiple transition zones decrease successively in the direction approaching the second sub-zone.

[0121] In some embodiments, the second sub-region of at least part of the sub-support layer also includes a plurality of strip-shaped openings, that is, at least in the second sub-region and a plurality of transition regions, the sub-support layer includes a plurality of strip-shaped openings extending along the second direction.

[0122] In some embodiments, the first length L1 of the transition zone is less than or equal to the first length L1 of the second sub-region; the first width S1 of the transition zone is less than or equal to the first width S1 of the second sub-region; the first distance D1 of the transition zone is greater than or equal to the first distance D1 of the second sub-region; and the second distance W1 of the transition zone is greater than or equal to the second distance W1 of the second sub-region.

[0123] In some embodiments, at least one of the first length L1 , the first width S1 , the first distance D1 , and the second distance W1 is not equal to the second sub-region in a transition region closest to the second sub-region.

[0124] In some embodiments, as Figure 8 As shown, the at least one sub-support layer 1011 includes: a first sub-support layer 1011 - 1 and a second sub-support layer 1011 - 2 .

[0125] In some embodiments, as Figure 8 As shown, the multiple transition areas B3 included in the first sub-support layer 1011-1 are multiple first transition areas B31; the multiple transition areas B3 included in the second sub-support layer 1011-2 are multiple second transition areas B32; the number of first transition areas B3 is equal to the number of second transition areas B3.

[0126] It should be noted that Figure 8 The number of transition regions B3 included in the first sub-support layer 1011-1 and the number of transition regions B3 included in the second sub-support layer 1011-2 are both 4. For ease of distinction, the first sub-region B1 of the first sub-support layer 1011-1 is denoted as B11, and the second sub-region B2 is denoted as B21; the first sub-region B1 of the second sub-support layer 1011-2 is denoted as B12, and the second sub-region B2 is denoted as B22; the four first transition regions B31 are numbered B31-1, B31-2, B31-3, and B31-4, respectively, and the four second transition regions B32 are numbered B32-1, B32-2, B32-3, and B32-4, respectively.

[0127] In some embodiments, the first length L1 of the first sub-support layer is greater than the first length L1 of the second sub-support layer, the first width S1 of the first sub-support layer is greater than the first width S1 of the second sub-support layer, the first distance D1 of the first sub-support layer is greater than the first distance D1 of the second sub-support layer, and the second distance W1 of the first sub-support layer is greater than the second distance W1 of the second sub-support layer.

[0128] In some embodiments, the ranges of the first length L1 , the first width S1 , the first distance D1 , the second distance W1 , and the modulus range of the first sub-support layer and the second sub-support layer are as shown in Table 1.

[0129] Table 1

[0130]

[0131] The curled display module provided in the embodiment of the present application includes multiple transition zones, so that the modulus of different areas of the sub-support layer can gradually change, further avoiding stress concentration at the junction of the curled zone and the first connection zone.

[0132] In some embodiments, as Figure 8 As shown, the first transition area B31 and the second transition area B32 are both located in the curling area A2, and the first transition area B31 corresponds to the second transition area B32 one by one.

[0133] In the rollable display module provided by the embodiment of the present application, the first transition region corresponds to the second transition region one-to-one, thereby minimizing the total size of the transition region of the support layer and improving the roll-up ratio of the rollable display module.

[0134] In some embodiments, as Figure 8 As shown, the orthographic projections of the first transition area B31 and the second transition area B32 on the back side (not shown) of the flexible display panel 1 coincide with each other.

[0135] Alternatively, in some embodiments, Figure 10 As shown, part of the first transition area B31 is located in the first connection area A1, and the remaining parts of the first transition area B31 and the second transition area B32 are located in the curling area A2. The first transition area B31 and the second transition area B32 located in the curling area A2 overlap.

[0136] In the curled display module provided in the embodiment of the present application, the first transition zone and the second transition zone are staggered, thereby increasing the total size of the transition zone of the support layer, improving the smoothness of the modulus transition of the support layer, and further avoiding the problem of stress concentration.

[0137] In some embodiments, as Figure 10 As shown, in the overlapping first transition area B31 and the second transition area B32, the orthographic projections of the first transition area B31 and the second transition area B32 on the back side (not shown) of the flexible display panel 1 coincide with each other.

[0138] In some embodiments, as Figure 11 As shown, the first reel 2 includes: a first sub-reel 201 and a second sub-reel 202; the surfaces of the first sub-reel 201 and the second sub-reel 202 are both hemispherical;

[0139] The first connection area A1 covers the first sub-scroll 201 and is connected to the first sub-scroll 201 , and the first connection area A1 does not contact the hemispherical surface of the second sub-scroll 202 ;

[0140] The radius r11 of the first sub-scroll 201 is smaller than the radius r12 of the second sub-scroll 202 ; the center Q1 of the first sub-scroll 201 is located on the side of the center Q2 of the second sub-scroll 202 facing the display surface in the unfolded state of the curling area A2 .

[0141] In the curled display module provided in an embodiment of the present application, the first scroll includes a first sub-scroll and a second sub-scroll with different radii, and the first sub-scroll with the smaller radius is connected to the first connection area of ​​the flexible display panel, thereby avoiding a step difference between the first connection area and the first scroll.

[0142] It should be noted that when the first reel includes a first sub-reel and a second sub-reel, the radius r12 of the second sub-reel serves as the radius of the first reel, and the rotation axis of the first reel passes through the center of the second sub-reel.

[0143] In some embodiments, the thickness T1 of the first connecting area, the radius r11 of the first sub-scroll and the radius r12 of the second sub-scroll satisfy: r12-r11=0.5×T1, and the distance h4 between the center of the first sub-scroll and the center of the second sub-scroll=0.5×T1.

[0144] This can prevent the end of the first connecting area away from the curling area from forming a step difference with the first scroll.

[0145] In some embodiments, the first reel, the first guide shaft, and the first positioning shaft may be solid structures or hollow structures.

[0146] In some embodiments, as Figure 12 As shown, the rollable display module further includes: a recycling member 12 connected to the back surface C2 of the flexible display panel 1. Thus, by applying a pulling force to the recycling member 12, the flexible display panel 1 can be changed from a rollable state to an unfolded state.

[0147] A display device provided in an embodiment of the present application includes the curled display module provided in an embodiment of the present application.

[0148] The display device provided in the embodiments of this application is any product or component with a display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigation system. Other essential components of the display device are well understood by those skilled in the art and are not described here in detail, nor should they be construed as limitations of this application. The implementation of this display device can be referenced to the aforementioned embodiment of the rollable display module, and any repetitive details will not be repeated.

[0149] To sum up, the curling display module and display device provided in the embodiments of the present application include a first guide shaft, which is in sliding contact with the curling area of ​​the flexible display panel, thereby supporting the curling area of ​​the flexible display panel, avoiding the problem of damage and failure of the flexible display panel caused by stress concentration at the junction of the curling area and the first connection area, and can improve the service life of the curling display module and enhance the user experience.

[0150] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0151] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A curled display module, characterized in that: The rollable display module includes: a flexible display panel, a first scroll connected to the flexible display panel, and a first guide shaft located on one side of the first scroll in a first direction; The flexible display panel includes: a curling area, and a first connection area located on one side of the curling area; The first connecting area is curled and connected to the first reel; The first guide shaft is in sliding contact with the curling area.

2. The rollable display module according to claim 1, wherein: The cross section of the first scroll perpendicular to its rotation axis and the cross section of the first guide axis perpendicular to its rotation axis are circular; The radius of the first scroll is a first radius, the radius of the first guide axis is a second radius, and the first radius r1 is smaller than the second radius r2; The first reel and the first guide axis are arranged along a first direction; a minimum distance between the first reel and the first guide axis in the first direction is greater than 0 and less than or equal to 5 mm.

3. The rollable display module according to claim 1, wherein: The rollable display module further includes: a first positioning shaft in sliding contact with the rollable area; the first positioning shaft is located on a side of the first guide shaft away from the first rollable shaft in the first direction, and the first positioning shaft and the first guide shaft are respectively located on two sides of the flexible display panel; The radius of the first positioning axis is smaller than the radius of the first scroll axis.

4. The curled display module according to any one of claims 1 to 3, characterized in that: The connection surface between the first scroll and the first connection area and the contact surface between the first guide axis and the curling area are located on the same surface of the flexible display panel; The rotation axis of the first scroll is located in a first plane parallel to the first direction; The rotation axis of the first guide axis is located in the first plane; or, the rotation axis of the first guide axis is located between the first plane and the curling area, and the distance h1 from the rotation axis of the first guide axis to the first plane satisfies: h1<0.5r1.

5. The curled display module according to claim 4, wherein: The rollable display module includes a first positioning axis; the radius of the first positioning axis r3<0.5r1; The first scroll comprises a first top surface and a first bottom surface, wherein the first top surface and the first bottom surface are respectively located on two sides of the first plane; The first positioning shaft includes a second top surface and a second bottom surface; The connection surface between the first scrolling shaft and the first connection area and the contact surface between the first guide shaft and the curling area are located on the same surface of the flexible display panel; the second top surface, the second bottom surface, and the first top surface are located on the same side of the first plane, and the distance between the second top surface and the first plane is greater than the distance between the second bottom surface and the first plane; A distance h2 from the first top surface to the first plane and a distance h3 from the second bottom surface to the first plane satisfy: h2-h3<0.5r1.

6. The roll-up display module according to any one of claims 1 to 3, characterized in that: The connection surface between the first scroll and the first connection area and the contact surface between the first guide axis and the curling area are located on different surfaces of the flexible display panel; An angle between a portion of the curling zone located between the first scroll axis and the first guide axis and the first direction is greater than or equal to 20° and less than or equal to 40°.

7. The curled display module according to claim 6, wherein: The rollable display module includes a first positioning axis, wherein the radius of the first positioning axis is r3<0.5r1; An angle between a portion of the curling zone located between the first guide axis and the first positioning axis and the first direction is greater than or equal to 0° and less than or equal to 25°.

8. The roll-up display module according to any one of claims 1 to 3, 5 and 7, characterized in that: The flexible display panel comprises: a support layer, and a display function layer located on one side of the support layer in the curling area; the first scroll is connected to the support layer; The support layer includes: at least one sub-support layer; the sub-support layer includes: a first sub-region located in the first connection region, a second sub-region located on one side of the first sub-region in the first direction and in the curling region, and a plurality of transition regions located between the first sub-region and the second sub-region; at least in the second sub-region and the plurality of transition regions, the sub-support layer includes a plurality of strip-shaped openings extending along a second direction; the second direction intersects the first direction; The length of the strip-shaped opening is a first length, the width of the strip-shaped opening is a first width, the distance between two adjacent strip-shaped openings in the first direction is a first distance, and the distance between two adjacent strip-shaped openings in the second direction is a second distance; At least one of the first length, the first width, the first distance, and the second distance in the multiple transition zones is different, and at least one of the first length, the first width, the first distance, and the second distance in the multiple transition zones increases or decreases sequentially.

9. The rollable display module according to claim 8, wherein: The first length of the transition zone closer to the first sub-region is less than the first length of the transition zone closer to the second sub-region; the first width of the transition zone closer to the first sub-region is less than or equal to the first width of the transition zone closer to the second sub-region; the first distance of the transition zone closer to the first sub-region is greater than or equal to the first distance of the transition zone closer to the second sub-region; the second distance of the transition zone closer to the first sub-region is greater than or equal to the second distance of the transition zone closer to the second sub-region.

10. The rollable display module according to claim 9, wherein: The first length of the transition zone is less than or equal to the first length of the second sub-region; the first width of the transition zone is less than or equal to the first width of the second sub-region; the first distance of the transition zone is greater than or equal to the first distance of the second sub-region; the second distance of the transition zone is greater than or equal to the second distance of the second sub-region.

11. The curled display module according to claim 9 or 10, characterized in that: The at least one sub-supporting layer includes: a first sub-supporting layer, and a second sub-supporting layer located between the first sub-supporting layer and the display function layer; The first length of the first sub-support layer is greater than the first length of the second sub-support layer, the first width of the first sub-support layer is greater than the first width of the second sub-support layer, the first distance of the first sub-support layer is greater than the first distance of the second sub-support layer, and the second distance of the first sub-support layer is greater than the second distance of the second sub-support layer.

12. The rollable display module according to claim 11, wherein: The plurality of transition regions included in the first sub-support layer are a plurality of first transition regions; the plurality of transition regions included in the second sub-support layer are a plurality of second transition regions; the number of the first transition regions is equal to the number of the second transition regions; The first transition region and the second transition region are both located in the curling region, and the first transition region corresponds to the second transition region in a one-to-one manner.

13. The rollable display module according to claim 11, wherein: The plurality of transition regions included in the first sub-support layer are a plurality of first transition regions; the plurality of transition regions included in the second sub-support layer are a plurality of second transition regions; the number of the first transition regions is equal to the number of the second transition regions; Part of the first transition zone is located in the first connecting zone, and the remaining parts of the first transition zone and the second transition zone are located in the curling zone. The first transition zone and the second transition zone located in the curling zone overlap.

14. The rollable display module according to any one of claims 1 to 3, 5, 7, 9 to 10, 12 to 13, characterized in that: The first reel includes: a first sub-reel and a second sub-reel; the surface of the first sub-reel and the surface of the second sub-reel are both hemispherical; The first connecting area covers the first sub-reel and is connected to the first sub-reel, and the first connecting area does not contact the hemispherical surface of the second sub-reel; The radius of the first sub-scroll is smaller than the radius of the second sub-scroll; the center of the first sub-scroll is located on the side of the display surface of the second sub-scroll when the center of the curling area is unfolded, the thickness T1 of the first connecting area, the radius r11 of the first sub-scroll, and the radius r12 of the second sub-scroll satisfy: r12-r11=0.5×T1, and the distance h4 between the center of the first sub-scroll and the center of the second sub-scroll is 0.5×T1.

15. A display device, characterized in that: It comprises the curled display module according to any one of claims 1 to 14.

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