Curled structure and display device

Abstract

This article discloses a curling structure and a display device. The curling structure includes: a plurality of repeated curling units, the curling unit includes a first supporting mechanism and a second supporting mechanism and a telescopic mechanism arranged between the first supporting mechanism and the second supporting mechanism; the first supporting mechanism includes a first supporting portion for fixing a flexible display screen and a first fixing portion arranged opposite to the first supporting portion; the second supporting mechanism includes a second supporting portion for fixing a flexible display screen and a second fixing portion arranged opposite to the second supporting portion; the telescopic mechanism includes a first end and a second end that can approach and move away from each other; wherein the adjacent ends of the first supporting portion and the second supporting portion are hinged, the first end is hinged to the first fixing portion, and the second end is hinged to the second fixing portion. The curling structure disclosed in the present invention can effectively improve the stability of the curling and flattening state of the flexible display screen, reduce stress damage to the flexible display screen, and improve the service life of the display device.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and more particularly, to a curling structure and a display device. Background Art

[0002] Organic Light Emitting Diode (OLED) is an active light-emitting display device with the advantages of light emission, ultra-thinness, wide viewing angle, high brightness, high contrast, low power consumption, and extremely high response speed. With the continuous development of display technology, OLED technology is increasingly used in flexible display devices and has gradually become a next-generation display technology with great development prospects.

[0003] OLED flexible display devices make electronic products more diverse. Among them, rollable OLED flexible display devices can reduce the size, increase portability, and be convenient to carry and use. One way to roll a rollable OLED flexible display device is to roll the flexible display screen on a reel. With this rolling method, the curling state is related to the tensile strength of the flexible display screen. It is difficult to keep the shape of the flexible screen in the same state each time it is rolled, which increases stress damage to the screen and reduces the service life of the OLED flexible display device. Summary of the invention

[0004] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0005] The embodiments of the present disclosure provide a curling structure and a display device, which can effectively improve the flattening and curling shape stability of a flexible display screen.

[0006] A curling structure provided by an embodiment of the present disclosure includes: a plurality of repeated curling units, wherein the curling units include a first supporting mechanism and a second supporting mechanism and a telescopic mechanism disposed between the first supporting mechanism and the second supporting mechanism;

[0007] The first supporting mechanism comprises a first supporting portion for fixing the flexible display screen and a first fixing portion arranged opposite to the first supporting portion;

[0008] The second supporting mechanism comprises a second supporting portion for fixing the flexible display screen and a second fixing portion arranged opposite to the second supporting portion;

[0009] The telescopic mechanism comprises a first end and a second end that can move toward and away from each other;

[0010] Wherein, the adjacent ends of the first supporting portion and the second supporting portion are hinged, the first end is hinged to the first fixing portion, and the second end is hinged to the second fixing portion.

[0011] In an exemplary embodiment, the first support portion includes two first articulated arms arranged in parallel and a first support arm arranged between the two first articulated arms; the second support portion includes two second articulated arms arranged in parallel and a second support arm arranged between the two second articulated arms, the first articulated arms and the second articulated arms correspond one to one and are hinged at their ends.

[0012] In an exemplary embodiment, the first fixed portion includes two first movable arms arranged in parallel and a first fixed arm arranged between the two first movable arms, and the first movable arms correspond one-to-one to the first articulated arms; the second fixed portion includes two second movable arms arranged in parallel and a second fixed arm arranged between the two second movable arms, and the second movable arms correspond one-to-one to the second articulated arms, the first end is hinged to the first movable arm, and the second end is hinged to the second movable arm.

[0013] In an exemplary embodiment, the first supporting mechanism further includes a first connecting arm, which connects the first articulated arm and the first movable arm; or connects the first supporting arm and the first fixed arm; the second supporting mechanism further includes a second connecting arm, which connects the second articulated arm and the second movable arm; or connects the second supporting arm and the second fixed arm.

[0014] In an exemplary embodiment, the first connecting arm includes four first sub-connecting arms, which connect the corresponding ends of the first articulated arm and the first movable arm; the second connecting arm includes four second sub-connecting arms, which connect the corresponding ends of the second articulated arm and the second movable arm.

[0015] In an exemplary embodiment, the first sub-connecting arms have the same length, and / or the second sub-connecting arms have the same length.

[0016] In an exemplary embodiment, the included angle between the first articulated arm and the first sub-connecting arm is 45° to 75°, and / or the included angle between the second articulated arm and the second sub-connecting arm is 45° to 75°.

[0017] In an exemplary embodiment, a length ratio of the first articulated arm to the first movable arm is 1.5:1 to 4:1, and / or a length ratio of the second articulated arm to the second movable arm is 1.5:1 to 4:1.

[0018] In an exemplary embodiment, the telescopic mechanism includes a telescopic member having an output end and two connecting members, wherein one end of the telescopic member away from the output end is connected to the hinge shafts of the two first hinged arms, and the two connecting members include a first connecting member and a second connecting member, wherein the first connecting member includes a first mating end hinged to the output end, and the first end is the end of the first connecting member away from the first mating end, and the second connecting member includes a second mating end hinged to the output end, and the second end is the end of the second connecting member away from the second mating end.

[0019] In an exemplary embodiment, the first supporting mechanism and the second supporting mechanism are the same, and the adjacent curling units share the first supporting mechanism or the second supporting mechanism in the middle.

[0020] In an exemplary embodiment, the length L1 of the first articulated arm satisfies:

[0021] L1 = θ * π * R / 180°;

[0022] Wherein, R is the curling radius of the curling structure, θ is the angle between the telescopic parts of adjacent curling units, N is the number of curling units, and N is a positive integer.

[0023] In an exemplary embodiment, the length of the first articulated arm is equal to the sum of the length of the first movable arm, the length of the first connecting member, and the length of the second connecting member.

[0024] In an exemplary embodiment, the curling structure also includes a support layer, which is arranged on a first support part and a second support part of a plurality of curling units, and the support layer includes a base layer, a first bonding layer arranged on a side of the base layer close to the curling unit, and a second bonding layer arranged on a side of the base layer away from the curling unit.

[0025] In an exemplary embodiment, the first bonding layers include a plurality of layers, which are arranged at intervals along the extension direction of the plurality of curling units. A serrated structure is provided on the base layer on the side facing the curling unit. The serrated structure is provided between adjacent first bonding layers and corresponds to the hinge position of the first support portion and the second support portion.

[0026] The display device provided by the embodiment of the present disclosure includes the above-mentioned curling structure and a flexible display screen, and the flexible display screen is arranged on a supporting surface.

[0027] The embodiment of the present disclosure provides a curling structure, and the flexible display screen can be fixed on the first support part and the second support part. The curling structure drives the first fixed part and the second fixed part to rotate with the hinge axis of the first support part and the second support part of the curling unit as the rotation center through the telescopic mechanism, so as to realize the flattening and bending of the curling structure. Since the flattening and bending states of the flexible display screen are controlled by the curling structure, the curling structure can ensure the consistency of the flattening state and the curling state, thereby effectively improving the stability of the curling and flattening states of the flexible display screen, reducing the stress damage of the flexible display screen, and improving the service life of the display device.

[0028] Other features and advantages of the present disclosure will be described in the following description, and partly become apparent from the description, or be understood by practicing the present disclosure. The purpose and other advantages of the present disclosure can be realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0029] Other aspects will be apparent upon reading and understanding the drawings and detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are used to provide further understanding of the technical solution of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the technical solution of the present disclosure and do not constitute a limitation on the technical solution of the present disclosure.

[0031] Figure 1a A schematic diagram of the structure of a display device in a flattened state using a curled structure according to an embodiment of the present disclosure;

[0032] Figure 1b A schematic structural diagram of a display device in a rolled-up state using a rolled-up structure according to an embodiment of the present disclosure;

[0033] Figure 2a This is a schematic diagram of the structure of the curled structure of the embodiment of the present disclosure in a flattened state;

[0034] Figure 2b This is a schematic diagram of the structure of the curled structure in the curled state of the embodiment of the present disclosure;

[0035] Figure 3 It is a three-dimensional diagram of the curled structure of the exemplary embodiment of the present disclosure in a flattened state;

[0036] Figure 4 is a structural diagram of a first bracket of a first supporting mechanism in an exemplary embodiment of the present disclosure;

[0037] Figure 5a It is a structural diagram of a telescopic member of an exemplary embodiment of the present disclosure;

[0038] Figure 5b It is a structural diagram of a first connecting member of an exemplary embodiment of the present disclosure;

[0039] Figure 5c It is a structural diagram of another first connecting member of an exemplary embodiment of the present disclosure;

[0040] Figure 6 This is a structural diagram of the curling structure of the exemplary embodiment of the present disclosure in a curled state;

[0041] Figure 7a A structural diagram of a support layer according to an exemplary embodiment of the present disclosure;

[0042] Figure 7b It is a structural diagram of another supporting layer of an exemplary embodiment of the present disclosure;

[0043] Figure 8 A curling process diagram of a curling structure of an exemplary embodiment of the present disclosure;

[0044] Fig. 9 A curling trajectory diagram of a curling structure combined with a flexible display screen according to an exemplary embodiment of the present disclosure.

[0045] Description of Reference Numerals

[0046] 1-display device; 100-curling structure; 100a-curling unit;

[0047] 110-first curling mechanism; 111-first supporting portion; 1111-first articulated arm;

[0048] 1112-first supporting arm; 112-first fixing portion; 1121-first movable arm;

[0049] 1122-first fixed arm; 1131-first sub-connecting arm; 120-second curling mechanism;

[0050] 121-second supporting portion; 1211-second articulated arm; 1212-second supporting arm;

[0051] 122-second fixed portion; 1221-second movable arm; 1222-second fixed arm;

[0052] 1231-second sub-connecting portion; 130-telescopic mechanism; 130a-first end;

[0053] 130b-second end; 131-telescopic member; 1311-driving body;

[0054] 1312-output shaft; 132-first connecting member; 133-second connecting member;

[0055] 140-support layer; 141-base layer; 1411-sawtooth structure;

[0056] 142-first adhesive layer; 143-second adhesive layer; 1111a-first hinged ear;

[0057] 1111b-first hinge rod; 1322-fourth hinge ear; 1321a-first body;

[0058] 1321b-second body; 200-flexible display screen. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical solution and advantages of the present disclosure more clear, the embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other arbitrarily.

[0060] In the description of the present disclosure, it should be noted that the terms "upper", "lower", "one side", "the other side", "one end", "the other end", "side", "relative", "four corners", "periphery", "'mouth'-shaped structure" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the referred structure has a specific orientation, is constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present disclosure.

[0061] In the description of the embodiments of the present disclosure, unless otherwise clearly specified and limited, the terms "connection", "direct connection", "indirect connection", "fixed connection", "installation", and "assembly" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; the terms "installation", "connection", and "fixed connection" can be a direct connection, or an indirect connection through an intermediate medium, or can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0062] The embodiment of the present disclosure provides a curling structure, comprising: a plurality of repeated curling units, the curling units comprising a first supporting mechanism and a second supporting mechanism and a telescopic mechanism disposed between the first supporting mechanism and the second supporting mechanism;

[0063] The first supporting mechanism includes a first supporting portion for fixing the flexible display screen and a first fixing portion arranged opposite to the first supporting portion;

[0064] The second supporting mechanism includes a second supporting portion for fixing the flexible display screen and a second fixing portion arranged opposite to the second supporting portion;

[0065] The telescopic mechanism includes a first end and a second end that can move toward and away from each other;

[0066] Wherein, the adjacent ends of the first supporting portion and the second supporting portion are hinged, the first end is hinged to the first fixing portion, and the second end is hinged to the second fixing portion.

[0067] The technical solution of the curling structure of the embodiment of the present disclosure is exemplarily described below with reference to the accompanying drawings.

[0068] Figure 1a A schematic diagram of the structure of a display device in a flattened state using a curled structure according to an embodiment of the present disclosure; Figure 1b FIG. 1 is a schematic diagram of a rolled-up display device using a rolled-up structure according to an embodiment of the present disclosure. Figure 1a-1b As shown, the display device 1 includes a rolling structure 100 and a flexible display screen 200 disposed on the rolling structure 100. The rolling structure 100 has a flattened state and a rolled state, wherein the unfolded state is as shown in FIG. Figure 1a As shown, the curling state is Figure 1b As shown. The curling structure 100 can switch between a flat state and a curled state. When the curling structure 100 is in a flat state, the flexible display screen 200 is flattened, and the flexible display screen 200 can display. When the curling structure 100 is in a curled state, the flexible display screen 200 is curled, which reduces the volume of the display device 1 and is easy to carry. The shape of the flexible display screen 200 changes as the shape of the curling structure 100 changes, and is consistent with the shape of the curling structure 100. Therefore, the shape of the flexible display screen 200 can remain consistent each time it is curled and unfolded, thereby reducing the stress damage of the flexible display screen 200 and extending the service life of the display device 1.

[0069] Figure 2a This is a schematic diagram of the structure of the curled structure of the embodiment of the present disclosure in a flattened state. Figure 2a As shown, the rolling structure 100 includes a plurality of repeated rolling units 100a, each of which includes a first supporting mechanism 110, a second supporting mechanism 120, and a telescopic mechanism 130 disposed between the first supporting mechanism 110 and the second supporting mechanism 120. In any of the rolling units 100a, the first supporting mechanism 110 includes a first supporting portion 111 for fixing the flexible display screen and a first fixing portion 112 disposed opposite to the first supporting portion 111. The second supporting mechanism 120 includes a second supporting portion 121 for fixing the flexible display screen and a second fixing portion 122 disposed opposite to the second supporting portion 121. The telescopic mechanism 130 includes a first end 130a and a second end 130b that can move closer to and farther from each other; wherein, the adjacent ends of the first supporting portion 111 and the second supporting portion 121 are hinged, the first end 130a is hinged to the first fixing portion 112, and the second end 130b is hinged to the second fixing portion 122. When the first end 130a and the second end 130b of the telescopic mechanism 130 are kept at the first distance, as shown in FIG. Figure 2aIn the position shown, the first supporting portions 111 and the second supporting portions 121 of the plurality of curling units 100a are coplanar, and the curling structure 100 is maintained in a flattened state.

[0070] Figure 2b This is a schematic diagram of the structure of the curled structure of the embodiment of the present disclosure in a curled state. Figure 2b As shown, the first end 130a and the second end 130b of the telescopic mechanism 130 are maintained at a second distance less than the first distance, the first fixing portion 112 and the second fixing portion 122 of the curling unit 100a are close to each other, the overall length of the first fixing portion 112 and the second fixing portion 122 of the plurality of curling units 100a is reduced, the overall length of the first supporting portion 111 and the second supporting portion 121 of the plurality of curling units 100a remains unchanged, the curling structure 100 bends inward, and the cross-section of the curling structure forms an arc shape, which includes a circle and an arc, wherein the overall length of the first fixing portion 112 and the second fixing portion 122 of the plurality of curling units 100a is equal to the sum of the body lengths of the plurality of first fixing portions and the second fixing portions and the spacings between adjacent first fixing portions 112 and second fixing portions 122, and the overall length of the first supporting portion 111 and the second supporting portion 121 of the plurality of curling units 100a is equal to the sum of the body lengths of the plurality of first supporting portions 111 and the plurality of second supporting portions 121. Taking a curling unit 100a as an example, when the first end 130a and the second end 130b of the telescopic mechanism 130 are maintained at the second distance, the first fixing portion 112 and the second fixing portion 122 are pulled in, and the overall length of the first fixing portion 112 and the second fixing portion 122 of the curling unit 100a is equal to the sum of the body lengths of the first fixing portion 112 and the second fixing portion 122 and the distance between the first fixing portion 112 and the second fixing portion 122, and is also the sum of the body lengths of the first fixing portion 112 and the second fixing portion 122 and the second distance. The first support portion 111 and the second support portion 121 rotate inwardly with the hinge axis as the rotation center, and the first support portion 111 and the second support portion 121 constitute an outer curved surface. The overall length of the first support portion 111 and the second support portion 121 of the curling unit 100a is equal to the sum of the body lengths of the first support portion 111 and the second support portion 121, and the angle between the first support portion 111 and the second support portion 121 is less than 180°.

[0071] The embodiment of the present disclosure provides a curling structure, and the flexible display screen can be fixed on the first support part and the second support part. The curling structure drives the first fixed part and the second fixed part to rotate with the hinge axis of the first support part and the second support part of the curling unit as the rotation center through the telescopic mechanism, so as to realize the flattening and bending of the curling structure. Since the flattening and bending states of the flexible display screen are controlled by the curling structure, the curling structure can ensure the consistency of the flattening state and the curling state, thereby effectively improving the stability of the curling and flattening states of the flexible display screen, reducing the stress damage of the flexible display screen, and improving the service life of the display device.

[0072] In an exemplary embodiment, if Figure 2a As shown, the first supporting mechanism 110 and the second supporting mechanism 120 are the same, and the adjacent curling units 100a share the middle first supporting mechanism 110 or the second supporting mechanism 120. For example, the leftmost curling unit 100a is defined as the first curling unit 100a1 ( Figure 2a The curling unit 100a adjacent to the first curling unit 100a1 is defined as the second curling unit 100a2 ( Figure 2a The first curling unit 100a1 and the second curling unit 100a2 share a middle support mechanism, and the middle support mechanism can be a first support mechanism 110 or a second support mechanism 120. In other words, if the curling structure 100 includes N curling units 100a, then the curling structure includes N+1 first support mechanisms (or second support mechanisms 120) and N telescopic mechanisms 130.

[0073] Figure 3It is a stereoscopic diagram of the curled structure of the exemplary embodiment of the present disclosure in a flattened state. In an exemplary embodiment, the first support portion 111 includes two first hinged arms 1111 arranged in parallel and a first support arm 1112 arranged between the two first hinged arms 1111. The second support portion 121 includes two second hinged arms 1211 arranged in parallel and a second support arm 1212 arranged between the two second hinged arms 1211, and the first hinged arm 1111 and the second hinged arm 1211 correspond to each other one by one and are hinged at the ends. The flexible display screen can be fixed on the first hinged arm 1111 and the second hinged arm 1211, or can be fixed on the first support arm 1112 and the second support arm 1212, or can be fixed on the first hinged arm 1111, the first support arm 1112, the second hinged arm 1211 and the second support arm 1212. The first support arm and the first hinged arm can be arranged vertically to form an "I"-shaped structure, vertical means substantially vertical, and the angle between the first support arm and the first hinged arm can be 85°, 87°, 90° or 93°. The second support arm and the second hinged arm can be arranged vertically to form an "I"-shaped structure, vertical means substantially vertical, and the angle between the second support arm and the second hinged arm can be 85°, 87°, 90° or 93°. In one example, one of the two hinged ends of the first hinged arm is provided with a first hinged ear, and the other is provided with a first hinged rod, and the first hinged ear and the first hinged rod are both provided with through holes. One of the two hinged ends of the second hinged arm is provided with a second hinged ear, and the other is provided with a hinged rod, and the second hinged ear and the second hinged rod are both provided with through holes. When the first support part and the second support part of the curling unit are hinged, the first hinge ear is sleeved on the outside of the second hinge rod, and the pin is inserted through the through hole on the first hinge ear and the second hinge rod, so that the first hinge arm of the first support mechanism and the second hinge arm of the second support mechanism are hinged, or the second hinge ear is sleeved on the outside of the first hinge rod, and the pin is inserted through the through hole on the second hinge ear and the first hinge rod, so that the first hinge arm of the first support mechanism and the second hinge arm of the second support mechanism are hinged. The pin is a hinge shaft. In this embodiment, the first hinge arm and the second hinge arm can be support rods, and the first support arm and the second support arm can be support plates, and the support rods are provided with through holes, and the support plates are fixed to the support rods by rivets or screws inserted through the through holes. The through holes can be opened in the middle of the support rods, in other words, the support plate is fixed to the middle of the support rods. The support rods can be flat, and the flat surface of the support rods is opposite to the end surface of the support plate. The surface of the support plate away from the fixing part is set as the support surface.

[0074] In an exemplary embodiment, if Figure 3As shown, the first fixed part 112 includes two first movable arms 1121 arranged in parallel and a first fixed arm 1122 arranged between the two first movable arms 1121, and the first movable arm 1121 corresponds to the first hinged arm 1111. The second fixed part 122 includes two second movable arms 1221 arranged in parallel and a second fixed arm 1222 arranged between the two second movable arms 1221, and the second movable arm 1221 corresponds to the second hinged arm 1211. The first movable arm 1121 of the first supporting mechanism 110 and the second movable arm 1221 of the second supporting mechanism 120 correspond to each other. The first end 130a of the telescopic mechanism 130 is hinged to the first movable arm 1121 of the first supporting mechanism 110, and the second end 130b of the telescopic mechanism 130 is hinged to the second movable arm 1221 of the second supporting mechanism. The first fixed arm 1122 and the first movable arm 1121 can be arranged vertically to form an "I"-shaped structure, vertical means substantially vertical, and the angle between the first fixed arm and the first movable arm can be 85°, 87°, 90° or 93°. The second fixed arm 1222 and the second movable arm 1221 can be arranged vertically to form an "I"-shaped structure, vertical means substantially vertical, and the angle between the first fixed arm and the first movable arm can be 85°, 87°, 90° or 93°. In one example, the two hinged ends of the first movable arm are provided with hinge holes, and the two hinged ends of the second movable arm are provided with hinge holes. In this embodiment, the first movable arm and the second movable arm can be support rods, and the first fixed arm and the second fixed part can be support plates, and the support rods are provided with through holes, and the support plates are fixed to the support rods by rivets or screws penetrated through the through holes. The through holes can be opened in the middle of the support rods, in other words, the support plates are fixed to the middle of the support rods. The support rods can be flat, and the flat surface of the support rods is opposite to the end surface of the support plate.

[0075] In an exemplary embodiment, if Figure 3As shown, the first support mechanism 110 also includes a first connecting arm, which connects the first articulated arm 1111 and the first movable arm 1121, or connects the first support arm 1112 and the first fixed arm 1122, so that the positions of the first support portion 111 and the first fixed portion 112 are relatively fixed. In one example, the first connecting arm includes four first sub-connecting arms 1131, each of which connects the corresponding ends of the first articulated arm 1111 and the first movable arm 1121. The second support mechanism 120 also includes a second connecting arm, which connects the second articulated arm 1211 and the second movable arm 1221, or connects the second support arm 1212 and the second fixed arm 1222, so that the positions of the second support portion 121 and the second fixed portion 122 are relatively fixed. In one example, the second connecting arm includes four second sub-connecting arms 1231, each of which connects the corresponding ends of the second articulated arm 1211 and the second movable arm 1221. In this example, the four first sub-connecting arms have the same length, the length of the first articulated arm 1111 is greater than the length of the first movable arm 1121, and the first articulated arm 1111, the first movable arm 1121 and the first sub-connecting arm 1131 located on the same side form an isosceles trapezoidal structure. The four second sub-connecting arms have the same length, the length of the second articulated arm 1211 is greater than the length of the second movable arm 1221, and the second articulated arm 1211, the second movable arm 1221 and the second sub-connecting arm 1231 located on the same side form an isosceles trapezoidal structure. In the curled structure, all the first articulated arms 1111 and the second articulated arms 1211 are distributed in the first plane, and all the first movable arms 1121 and the second movable arms 1221 are distributed in the second plane, and the first plane is parallel to the second plane.

[0076] In one example, the first supporting mechanism may first form a first supporting portion and a first fixing portion, and then connect the first supporting portion and the first fixing portion through a first sub-connecting arm. The second supporting mechanism may first form a second supporting portion and a second fixing portion, and then connect the second supporting portion and the second fixing portion through a second sub-connecting arm.

[0077] Figure 4 : is a structural diagram of the first bracket of the first support mechanism in the exemplary embodiment of the present disclosure. In another example, the first articulated arm, the first movable arm and the first sub-connecting arm first form a first bracket, and the first support arm and the first fixed arm connect the two first brackets. The second articulated arm, the second movable arm and the second sub-connecting arm first form a second bracket, and the second support arm and the second fixed arm connect the two second brackets. Taking the first support mechanism as an example, Figure 3 and Figure 4As shown, the first support mechanism 110 includes two first brackets, a first support arm 1112 and a first fixed arm 1122 that are arranged opposite to each other. The first bracket includes a first hinged arm 1111 and a first movable arm 1121 that are arranged opposite to each other, and two first sub-connecting arms 1131. The ends of the first hinged arm 1111 and the first movable arm 1121 located on the same side are connected to a first sub-connecting arm 1131. The first support arm 1112 is located between the first hinged arms 1111 of the two first brackets and is connected to the two first hinged arms 1111. The first fixed arm 1122 is located between the first movable arms 1121 of the two first brackets and is connected to the two first movable arms 1121. The length of the first movable arm 1121 is shorter than that of the first hinged arm 1111. One of the two hinged ends of the first hinged arm 1111 is provided with a first hinged ear 1111a, and the other is provided with a first hinged rod 1111b. Both the first hinged ear 1111a and the first hinged rod 1111b are provided with through holes. Both hinge ends of the first movable arm 1121 are provided with hinge holes. The second supporting mechanism is similar in structure to the first supporting mechanism, and will not be described in detail here.

[0078] In an exemplary embodiment, if Figure 4 As shown, in the first support mechanism, the length ratio L1 / L2 of the first articulated arm 1111 and the first movable arm 1121 is 1.5:1 to 4:1, for example, L1 / L2 is 2:1 or 3:1. The angle α between the first articulated arm 1111 and the first sub-connecting arm 1131 is 45° to 75°, for example, 60°. In the second support mechanism, the length ratio of the second articulated arm and the second movable arm is 1.5:1 to 4:1, for example, 2:1 or 3:1. The angle between the second articulated arm and the second sub-connecting arm is 45° to 75°, for example, 60°. The first support portion and the second support portion may be the same or different, and the first fixed portion and the second fixed portion may be the same or different.

[0079] In an exemplary embodiment, if Figure 3As shown, the telescopic mechanism 130 includes a telescopic member 131 having an output end and two connecting members, one end of the telescopic member 131 away from the output end is connected to the hinge shaft of the first support portion 111 and the second support portion 121, and the two connecting members include a first connecting member 132 and a second connecting member 133. The first connecting members 132 each include a first mating end hinged to the output end, the first end 130a includes an end of the first connecting member 132 away from the first mating end, the second connecting member 133 each includes a second mating end hinged to the output end, and the second end 130b includes an end of the second connecting member 133 away from the second mating end, for example, the connecting member located on the left side of the telescopic member 131 is the first connecting member, the connecting member located on the right side of the telescopic member is the second connecting member, the right end of the first connecting member is the first mating end, the left end of the first connecting member is the first end 130a, the left end of the second connecting member is the second mating end, and the right end of the second connecting member is the second end 130b. In the same curling unit, the number of the telescopic member 131 and the connecting member combination is set according to actual needs. When the first support mechanism includes two first movable arms and the second support mechanism includes two second movable arms, the number of the telescopic member 131 and the connecting member combination is two groups.

[0080] In an exemplary embodiment, if Figure 3 As shown, the first supporting mechanism and the second supporting mechanism are the same, the length of the first articulated arm 1111 is equal to the sum of the lengths of the first movable arm 1121, the first connecting member 132, and the second connecting member 133. Similarly, the length of the second articulated arm 1211 is equal to the sum of the lengths of the second movable arm 1221, the first connecting member 132, and the second connecting member 133. When the curled structure is in a flattened state, the first connecting member and the second connecting member are flattened.

[0081] Figure 5a FIG. 1 is a structural diagram of a telescopic member of an exemplary embodiment of the present disclosure. In an exemplary embodiment, Figure 5a As shown, the telescopic member 131 includes a driving body 1311 and an output shaft 1312 disposed in the driving body 1311, a hinge hole is disposed at the output end of the output shaft 1312, a third hinge ear is disposed at one end of the driving body 1311 away from the output shaft 1312, a through hole is disposed on the third hinge ear, the third hinge ear is sleeved on the outer side of the hinge end of the first support mechanism and the second support mechanism, and a pin connecting the first support part and the second support part is passed through the through hole of the third hinge ear. In this example, the telescopic member can be a linear drive, and the linear drive includes a cylinder or a screw motor.

[0082] Figure 5bThe structural diagram of a first connecting member of an exemplary embodiment of the present disclosure. In an exemplary embodiment, the first connecting member 132 includes a connecting body 1321 and fourth hinged ears 1322 arranged at both ends of the connecting body 1321, and a through hole is arranged on the fourth hinged ear 1322, wherein one fourth hinged ear 1322 is sleeved on the outer side of the output shaft and connected to the output shaft through a pin passing through the through hole and the hinge hole on the output shaft, and the other fourth hinged ear is sleeved on the outer side of the first fixing portion and is hinged to the first fixing portion through a pin passing through the through hole and the hinge hole arranged on the first fixing portion.

[0083] Figure 5c The structural diagram of another first connecting member of the exemplary embodiment of the present disclosure. The connecting member body 1321 includes a first body 1321a and a second body 1321b, a fourth hinged ear 1322 is provided on the first body 1321a, and another fourth hinged ear 1322 is provided on the second body 1321b, and the end of the first body 1321a away from the third hinged ear 1322 on the first body 1321a is connected to the end of the second body 1321b away from the third hinged ear 1322 on the second body 1321b, and the first body 1321a and the second body 1321b can move relative to each other to adjust the distance between the two fourth hinged ears 1322. In one example, the end of the first body 1321a away from the fourth hinged ear 1322 on the first body 1321a is provided with one of a screw sleeve or a screw rod, and the end of the second body 1321b away from the fourth hinged ear 1322 on the second body 1321b is provided with the other of a screw sleeve or a screw rod, and the screw rod is threadedly connected with the screw sleeve. The distance between the two fourth hinged ears 1322 is adjusted by adjusting the length of the screw rod screwed into the screw sleeve, so that the telescopic member is always kept in the middle position of the two supporting mechanisms during the action.

[0084] In an exemplary embodiment, the second connecting member may be Figure 5b The structure can also be used as Figure 5c The structure of the second connecting member will not be described in detail.

[0085] On the whole, the first support mechanism and the second support mechanism are both referred to as support mechanisms, and adjacent curling units share a middle support mechanism. That is to say, the curling structure includes N+1 support mechanisms and N telescopic mechanisms, and the N+1 support mechanisms and N telescopic mechanisms constitute N curling units, where N is an integer greater than or equal to 1.

[0086] In order to avoid the protrusion of the hinge point between the first hinge arm and the second hinge arm, which may cause stress damage to the flexible display screen and reduce the life of the flexible display screen. Figure 6 This is a structural diagram of the curled structure of the exemplary embodiment of the present disclosure in a curled state. Figure 6As shown, the first support mechanism and the second support mechanism are the same, and adjacent curling units share the first support mechanism or the second support mechanism in the middle. The curling structure 100 is in a fully curled state, and the cross section forms an arc-shaped structure with a curling radius of R. The arc-shaped structure includes a circular structure and an arc-shaped structure. Because the lengths of the first articulated arm and the second articulated arm are the same, the first articulated arm is used for explanation below. The length L1 of the first articulated arm 1111 is L1=θ*π*R / 180°, where θ is the angle between the telescopic parts 131 of adjacent curling units. When the curling structure is bent and curled, the cross section is circular, θ=360° / N, where θ is the number of curling units, and N is a positive integer. In this formula, the length of the first articulated arm 1111 is approximately equal to the arc length corresponding to the angle θ, so that the outer arc formed by the first articulated arm of the curling structure is close to a circular arc. The more N there are, the smaller the angle θ and the smaller L1 are. After the curling structure is fully curled, the larger the angle between adjacent first hinged arms is, the smoother the transition of the hinged position is, and the smaller the bending stress on the flexible display is. Therefore, the larger N is, the better. However, from the formula L1=θ*π*R / 180°, it can be seen that θ, the curling radius R, and the length L1 of the first hinged arm are interrelated. Therefore, it is necessary to design the curling radius R according to the application scenario of the curling structure, and reasonably design the length L1 of the first hinged arm or the N value according to the curling radius R.

[0087] Figure 7a FIG. 1 is a structural diagram of a support layer of an exemplary embodiment of the present disclosure. In an exemplary embodiment, the curling structure further includes a support layer 140, and the support layer 140 is disposed on the first support portion and the second support portion of the plurality of curling units. The flexible display screen is disposed on the side of the support layer 140 away from the curling unit. Figure 7a As shown, the support layer 140 includes a base layer 141, a first adhesive layer 142 arranged on the side of the base layer 141 close to the curling unit, and a second adhesive layer 143 arranged on the side of the base layer 141 away from the curling unit. The first adhesive layer 142 is bonded to the first support part and the second support part, and the second adhesive layer 143 is bonded to the flexible display screen. The base layer has a certain strength to support the flexible display screen, and has a certain flexibility, and can bend and stretch under the drive of multiple curling units. The base layer is also elastic, and a slight compression deformation can be generated in the thickness direction during the bending process, so as to buffer the non-theoretical regular circles formed by multiple curling units, smoothly transition the hinge points of adjacent support parts, make the bending state of the flexible display screen closer to the theoretical circle, and protect the flexible display screen. In this embodiment, the base layer may include at least one layer of a polyimide layer, a polyethylene terephthalate layer, a polymethyl methacrylate layer, and a glass fiber cloth. The first adhesive layer may include a polyurethane adhesive layer, a polymethacrylate adhesive layer, an epoxy resin adhesive layer, etc. The second adhesive layer may include a polyurethane adhesive layer, a polymethacrylate adhesive layer, an epoxy resin adhesive layer, etc., and the second adhesive layer may be made of optical adhesive.

[0088] Figure 7b FIG. 1 is a structural diagram of another supporting layer 140 of an exemplary embodiment of the present disclosure. In an exemplary embodiment, Figure 7b As shown, the first adhesive layer 142 includes a plurality of first adhesive layers 142, which are arranged at intervals along the extension direction of the plurality of curling units. A sawtooth structure 1411 is provided on the base layer 141 toward the curling unit. The sawtooth structure 1411 is provided between adjacent first adhesive layers 142 and corresponds to the hinge position of the first support portion and the second support portion. The sawtooth structure 1411 can reduce the stress on the base layer and extend the service life of the support layer 140. In this embodiment, the first adhesive layer can correspond to the first support arm one by one, and the first adhesive layer is connected to the first support arm.

[0089] The technical solution of the curling structure disclosed in the present invention is exemplified below by using the working principle of the curling structure disclosed in the present invention.

[0090] Figure 8 FIG. 1 is a diagram showing the curling process of the curling structure of the exemplary embodiment of the present disclosure. Figure 8 As shown, the curling structure 100 includes N curling units 100a, the first ends 130a and the second ends 130b of the N telescopic mechanisms 130 are kept at a first distance, and the curling structure 100 is in a flattened state ( Figure 8As shown in Figure 2A, in the flattened state, all the first articulated arms 1111, the second articulated arms 1211, the first supporting arms and the second supporting arms are distributed in the first plane, and all the first movable arms 1121, the second movable arms 1221, the first fixed arms, the second fixed arms, the first connecting members 132 and the second connecting members 133 are distributed in the second plane, and the first plane is parallel to the second plane. After receiving the extension control instruction, the 2N telescopic parts 131 perform linear extension movement at the same speed. Under the action of linear tension, taking a curling unit as an example, the first mating end of the first connecting part 132 and the second mating end of the second connecting part 133 on both sides move upward, and the first end 130a and the second end 130b approach each other. The distance between the first end 130a and the second end 130b gradually shortens, thereby driving the first movable arm 1121 and the second movable arm 1221 to approach each other, and the first articulated arm 1111 and the second articulated arm 1211 rotate inward. After the intermediate process BCDE, the first end 130a and the second end 130b are maintained at the second distance, and the telescopic part 131 stops extending, thereby realizing the movement of the curling structure 100 from the flattened state A to the fully curled state F, and the cross-section of the curling structure 100 forms a circular structure with a curling radius R. Following the same principle, when the curling structure 100 is in a bent state, the 2N telescopic members 131 perform a linear contraction motion at the same speed after receiving a contraction command. Taking one curling unit as an example, under the action of a linear thrust, the first end 130a on the first connecting member 132 and the second end 130b on the second connecting member 133 move away from each other, thereby driving the first movable arm 1121 and the second movable arm 1221 to move away from each other, and the first articulated arm 1111 and the second articulated arm 1211 rotate outward until the first connecting member 132 and the second connecting member 133 are completely flattened, thereby causing the curling structure 100 to move from a fully curled state F to a flattened state A.

[0091] Fig. 9 FIG. 1 is a curling trajectory diagram of a curling structure combined with a flexible display screen according to an exemplary embodiment of the present disclosure. Fig. 9 As shown, a point on the flexible display screen 200 is randomly selected for trajectory simulation. From the simulation trajectory, it can be seen that during the curling process of the curling structure 100, each point on the flexible display screen 200 moves with different arc lengths under its own arc trajectory line. The arc trajectory line is smooth without any irregular trajectory protrusions such as protrusions and depressions, thereby avoiding damage to the flexible display screen 200 due to protruding curling stress points, thereby ensuring a longer service life of the flexible display screen 200, and finally the entire flexible display screen curls up to form a cylindrical shape.

[0092] The present disclosure also provides a display device, such as Figure 1a and 1bAs shown, it includes the curling structure 100 and the flexible display screen 200 of the above embodiment, and the flexible display screen 200 is arranged on the first support part and the second support part. The side of the flexible display screen 200 away from the curling structure 100 is the display side. The display device 1 includes a flat state and a curled state. The display device 1 can display in the flat state and be carried in the curled state. The flexible display screen 200 can include an OLED display screen.

[0093] In one example, if Figure 1b As shown, when the flexible display screen 200 is in the rolled state, there is no overlapping part of the flexible display screen 200, and the flexible display screen 200 can also display in the rolled state, so that the display device 1 can realize two working modes of flat display and curved display.

[0094] Although the embodiments disclosed in the present disclosure are as above, the contents described are only embodiments adopted to facilitate understanding of the present disclosure and are not intended to limit the present disclosure. Any technician in the field to which the present disclosure belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in the present disclosure, but the scope of patent protection of the present disclosure shall still be defined by the attached claims.

Claims

1. A curling structure, characterized in that: include: A plurality of repeated curling units, each of which comprises a first supporting mechanism, a second supporting mechanism, and a telescopic mechanism disposed between the first supporting mechanism and the second supporting mechanism; The first supporting mechanism comprises a first supporting portion for fixing the flexible display screen and a first fixing portion arranged opposite to the first supporting portion; The second supporting mechanism comprises a second supporting portion for fixing the flexible display screen and a second fixing portion arranged opposite to the second supporting portion; The telescopic mechanism comprises a first end and a second end that can move toward and away from each other; Wherein, the adjacent ends of the first supporting portion and the second supporting portion are hinged, the first end is hinged to the first fixing portion, and the second end is hinged to the second fixing portion; The curling structure has a flattened state and a curled state. In the flattened state, the first end and the second end are far away from each other, a plurality of the first supporting parts and a plurality of the second supporting parts are coplanar, a plurality of the first fixing parts and a plurality of the second fixing parts are coplanar, and the flexible display screen is flattened; in the curled state, the first end and the second end are close to each other, a cross section of the curling unit forms a circle or an arc, the first supporting part and the second supporting part form an outer curved surface, a plurality of the first fixing parts and a plurality of the second fixing parts are surrounded by the outer curved surface, and the flexible display screen is curled; In the flattened state, the telescopic mechanism drives the first fixing part and the second fixing part to rotate with the hinge axis of the first supporting part and the second supporting part of the curling unit as the rotation center, so that the curling structure bends inward and switches to the curling state; the plane where the movement tracks of the first end and the second end are located is perpendicular to the flexible display screen; The first support portion includes two first articulated arms arranged in parallel and a first support arm arranged between the two first articulated arms; the second support portion includes two second articulated arms arranged in parallel and a second support arm arranged between the two second articulated arms, the first articulated arms and the second articulated arms correspond to each other one by one and are hinged at their ends; The first fixing part includes two first movable arms arranged in parallel and a first fixed arm arranged between the two first movable arms, and the first movable arms correspond to the first hinged arms one by one; the second fixing part includes two second movable arms arranged in parallel and a second fixed arm arranged between the two second movable arms, and the second movable arms correspond to the second hinged arms one by one, the first end is hinged to the first movable arm, and the second end is hinged to the second movable arm; The first supporting mechanism further comprises a first connecting arm, the first connecting arm connecting the first articulated arm and the first movable arm; or connecting the first supporting arm and the first fixed arm; the second supporting mechanism further comprises a second connecting arm, the second connecting arm connecting the second articulated arm and the second movable arm; or connecting the second supporting arm and the second fixed arm; The first connecting arm includes four first sub-connecting arms, which connect the corresponding ends of the first articulated arm and the first movable arm; the second connecting arm includes four second sub-connecting arms, which connect the corresponding ends of the second articulated arm and the second movable arm.

2. The curling structure according to claim 1, characterized in that: The first sub-connecting arms have the same length, and / or the second sub-connecting arms have the same length.

3. The curling structure according to claim 1, characterized in that: The included angle between the first articulated arm and the first sub-connecting arm is 45° to 75°, and / or the included angle between the second articulated arm and the second sub-connecting arm is 45° to 75°.

4. The curling structure according to claim 1, characterized in that: A length ratio of the first articulated arm to the first movable arm is 1.5:1 to 4:1, and / or a length ratio of the second articulated arm to the second movable arm is 1.5:1 to 4:

1.

5. The curling structure according to any one of claims 1 to 4, characterized in that: The telescopic mechanism includes a telescopic member having an output end and two connecting members, wherein one end of the telescopic member away from the output end is connected to the hinge shafts of the two first hinged arms, and the two connecting members include a first connecting member and a second connecting member, wherein the first connecting member includes a first mating end hinged to the output end, and the first end is the end of the first connecting member away from the first mating end, and the second connecting member includes a second mating end hinged to the output end, and the second end is the end of the second connecting member away from the second mating end.

6. The curling structure according to claim 5, characterized in that: The first supporting mechanism is the same as the second supporting mechanism, and the adjacent curling units share the first supporting mechanism or the second supporting mechanism in the middle.

7. The curling structure according to claim 6, characterized in that: The length L1 of the first articulated arm satisfies: L1=θ*π*R / 180°; Wherein, R is the curling radius of the curling structure, and θ is the angle between the telescopic parts of adjacent curling units.

8. The curling structure according to claim 6, characterized in that: The length of the first articulated arm is equal to the sum of the lengths of the first movable arm, the first connecting member and the second connecting member.

9. The curled structure according to any one of claims 1 to 4, characterized in that: The curling structure also includes a support layer, which is arranged on the first support part and the second support part of multiple curling units. The support layer includes a base layer, a first bonding layer arranged on the side of the base layer close to the curling unit, and a second bonding layer arranged on the side of the base layer away from the curling unit.

10. The curling structure according to claim 9, characterized in that: The first adhesive layers include a plurality of layers, which are arranged at intervals along the extension direction of the plurality of curling units. A serrated structure is provided on the base layer on the side facing the curling unit. The serrated structure is provided between adjacent first adhesive layers and corresponds to the hinge position of the first support portion and the second support portion.

11. A display device, characterized in that: It comprises the curling structure according to any one of claims 1 to 10 and a flexible display screen, wherein the flexible display screen is arranged on a supporting surface.

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