Flexible display screen, manufacturing method and electronic device

Abstract

Embodiments of the present application provide a flexible display screen, a manufacturing method and an electronic device, which are applied to the field of display technology, and the flexible display screen comprises a display function layer and a support layer. The display function layer is attached to the support layer. The side of the support layer away from the display function layer is provided with a first sliding connection structure. The first sliding connection structure is used to realize sliding connection along the direction perpendicular to the folding center line with a second sliding connection structure arranged on the pressing plate in the folding process of the flexible display screen. In this scheme, when the flexible display screen is folded, the relative sliding between the support layer and the pressing plate is caused, the stress and strain generated between the support layer and the display function layer due to folding dislocation are released, the local aggregation of stress and strain is avoided, and the problem of possible separation between film layers caused by adverse arching defects in the folding process of the flexible display screen is improved.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a flexible display screen, its manufacturing method, and an electronic device. Background Technology

[0002] Currently, flexible display products are gaining increasing acceptance among users in the market. The emergence of foldable displays can simultaneously meet users' needs for large-screen displays and portability. However, flexible displays are still in their early stages of development, and their stability and folding lifespan during use remain uncertain. Many problems encountered by users are also unpredictable. For example, during the folding process, stress and strain caused by misalignment in the folding area and surrounding regions may accumulate locally, potentially leading to poor anti-arching and separation between film layers. Summary of the Invention

[0003] The purpose of this invention is to provide a flexible display screen, its manufacturing method, and an electronic device, to improve the problem of potential film layer separation caused by stress and strain accumulation in the folding area and surrounding regions of the flexible display screen due to folding misalignment during bending. The specific technical solution is as follows:

[0004] First, this application provides a flexible display screen, which is mounted on the frame of an electronic device via a pressure plate. The flexible display screen includes:

[0005] Display functional layer and support layer;

[0006] The display function layer is attached to the support layer;

[0007] The support layer is provided with a first sliding connection structure on the side away from the display function layer; the first sliding connection structure is used to achieve a sliding connection with a second sliding connection structure provided on the pressure plate in a direction perpendicular to the folding center line during the folding process of the flexible display screen.

[0008] In some embodiments of this application, after the flexible display screen is folded, a folding area, two opposing first connecting areas, two opposing outward bending areas, and two opposing second connecting areas are formed sequentially from the middle to both sides.

[0009] The two opposing first connection areas are connected to the main frame of the electronic device through two symmetrically arranged first pressure plates; the two opposing second connection areas are connected to the main frame of the electronic device through two symmetrically arranged second pressure plates.

[0010] The first sliding connection structure and the second sliding connection structure are disposed opposite to each other on the support layer and the first pressure plate; and / or, are disposed opposite to each other on the support layer and the second pressure plate.

[0011] In some embodiments of this application, the support layer includes a first support region located in the folded region and the first connection region, and a second support region located in the second connection region;

[0012] The first sliding connection structure is disposed at the location of the first support area in the first connection area; and / or, disposed at the location of the second support area in the second connection area;

[0013] The second sliding connection structure is disposed at the position corresponding to the first pressure plate and the first sliding connection structure; and / or, disposed at the position corresponding to the second pressure plate and the first sliding connection structure.

[0014] In some embodiments of this application, the first sliding connection structure is disposed at the location of the first support area of ​​the support layer, and the second sliding connection structure is correspondingly disposed on the first pressure plate, such that the first support area and the first pressure plate are slidably connected; and the second support area of ​​the support layer is fixedly connected to the second pressure plate; or,

[0015] The first sliding connection structure is disposed at the location of the second support area of ​​the support layer, and the second sliding connection structure is correspondingly disposed on the second pressure plate, such that the second support area and the second pressure plate are slidably connected; and the first support area of ​​the support layer is fixedly connected to the first pressure plate; or,

[0016] The first support area and the second support area of ​​the support layer are both provided with a first sliding connection structure, and the first pressure plate and the second pressure plate are both provided with a second sliding connection structure, so that the first support area and the first pressure plate, as well as the second support area and the second pressure plate, are slidably connected.

[0017] In some embodiments of this application, the first sliding connection structure is a first slide rail arranged along a direction perpendicular to the folding center line, and the first slide rail is provided with a first groove structure;

[0018] The second sliding connection structure is a second slide rail arranged in a direction perpendicular to the folding center line. The second slide rail is provided with a first rib structure that can be embedded in the first groove structure of the first slide rail. The first rib structure can be embedded in the first groove structure of the first slide rail and is in clearance fit with the first groove structure.

[0019] In some embodiments of this application, the bottom of the first groove structure of the first slide rail is fixedly connected to the support layer, and the groove opening is constricted to limit the second slide rail in the thickness direction of the flexible display screen.

[0020] The first rib structure of the second slide rail includes: a first connecting part and a first embedding part; the first connecting part is fixedly connected to the pressure plate; the first embedding part is used to cooperate with the first groove structure of the first slide rail.

[0021] In some embodiments of this application, the second sliding connection structure is a third slide rail arranged along a direction perpendicular to the folding center line, and the third slide rail is provided with a second groove structure;

[0022] The first sliding connection structure is a fourth slide rail arranged along a direction perpendicular to the folding center line. The fourth slide rail is provided with a second rib structure that can be embedded in the second groove structure of the third slide rail. The second rib structure can be embedded in the second groove structure of the third slide rail and is in clearance fit with the second groove structure.

[0023] In some embodiments of this application, the bottom of the second groove structure of the third slide rail is fixedly connected to the pressure plate, and an inner groove is provided in the groove along the length of the groove.

[0024] The second rib structure of the fourth slide rail includes: a second connecting part and a second embedding part; the second connecting part is fixedly connected to the support layer, and the second embedding part is used to cooperate with the second groove structure of the third slide rail;

[0025] The second embedded part of the fourth slide rail is provided with a through groove that runs through the length of the fourth slide rail.

[0026] In some embodiments of this application, the first sliding connection structure includes: a plurality of slide rail segments arranged at intervals along the direction of the folding center line; the second sliding connection structure includes: a plurality of mating slide rail segments arranged at intervals along the direction of the folding center line and corresponding one-to-one with each slide rail segment.

[0027] The number of slide rail sections is 3-5;

[0028] The length of the slide rail section is 6-9mm;

[0029] The distance between the slide rail section located at the edge of the support layer and the edge of the support layer is 15-20mm.

[0030] Secondly, this application also provides a method for manufacturing a flexible display screen, used in any of the aforementioned flexible display screens, the method comprising:

[0031] Fabrication of the display functional layer;

[0032] A support layer is prepared on one side of the display functional layer, so that the display functional layer and the support layer are attached together;

[0033] Using a mold injection molding process, a first sliding connection structure is injection molded on the side of the support layer away from the display function layer.

[0034] In some embodiments of this application, the step of using mold injection molding to injection mold the first sliding connection structure on the side of the support layer away from the display functional layer includes: placing the product including the display functional layer and the support layer into the mold and closing the mold, vacuum injection molding, and ultraviolet curing.

[0035] In some embodiments of this application, during the process of placing the product into the mold and closing the mold, the accuracy of the mold is less than ±20 μm (micrometers).

[0036] In some embodiments of this application, the mold injection process uses quartz glass or acrylic as the mold injection material;

[0037] The vacuum degree of the injection molding process is less than 20 mbar.

[0038] During the vacuum dispensing process,

[0039] The viscosity range of the mold injection material is 9000–19000 mPa·s;

[0040] The volume shrinkage rate of the mold injection material is less than 2.2%;

[0041] The bonding strength between the mold injection material and the support layer is greater than 29 MPa;

[0042] The shear strength of the mold injection material and the support layer is greater than 7.8 MPa.

[0043] In some embodiments of this application, during the UV curing process,

[0044] The hardness of the mold injection material after curing is 70D to 92D;

[0045] The curing wavelength is 365nm, 405nm, or 470nm;

[0046] The curing temperature range is 20℃~32℃.

[0047] Furthermore, embodiments of this application also provide an electronic device, including: the flexible display screen and the overall frame as described in any of the above claims;

[0048] The flexible display screen is mounted on the frame of the electronic device via a pressure plate.

[0049] Beneficial effects of the embodiments of the present invention:

[0050] This invention provides a flexible display screen, its manufacturing method, and an electronic device. The flexible display screen is mounted on the frame of the electronic device via a pressure plate. When the flexible display screen is folded, strain displacement occurs between the display functional layer and the support layer. In this embodiment, the display functional layer of the flexible display screen is attached to the support layer. Simultaneously, the support layer and the pressure plate are connected via a first sliding connection structure and a second sliding connection structure, forming a sliding connection perpendicular to the folding centerline. Therefore, when the flexible display screen is folded, relative sliding occurs between the support layer and the pressure plate, releasing the stress and strain generated by the folding displacement between the support layer and the display functional layer. This avoids localized stress and strain accumulation, thereby improving the problem of potential film layer separation caused by poor anti-arching during the folding process of the flexible display screen.

[0051] Of course, implementing any product or method of the present invention does not necessarily require achieving all of the advantages described above at the same time. Attached Figure Description

[0052] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained based on these drawings.

[0053] Figure 1 This is a schematic diagram of the structure of a flexible display screen in a folded state in related technologies.

[0054] Figure 2 This is a bottom view of a flexible display screen in its unfolded state in a related technology.

[0055] Figure 3 This is a front view of a flexible display screen in its unfolded state in related technologies;

[0056] Figure 4 This is a schematic diagram of the film layer arching phenomenon in a flexible display screen in related technologies.

[0057] Figure 5 A schematic diagram of the structure of the first embodiment of the flexible display screen provided in this application;

[0058] Figure 6 A schematic diagram of the structure of the first embodiment of the pressure plate provided in this application;

[0059] Figure 7 for Figure 5 and Figure 6A schematic diagram of the structure when a flexible display screen is assembled with a pressure plate;

[0060] Figure 8 This is a schematic diagram of the flexible display screen of this application in its folded state.

[0061] Figure 9 for Figure 5 A bottom view of the first connection method for flexible displays;

[0062] Figure 10 for Figure 5 A bottom view of the second connection method for flexible displays;

[0063] Figure 11 for Figure 5 A bottom view of the third connection method for flexible displays;

[0064] Figure 12 A schematic diagram of the structure of the second embodiment of the flexible display screen provided in this application;

[0065] Figure 13 A schematic diagram of the structure of the second embodiment of the pressure plate provided in this application;

[0066] Figure 14 for Figure 12 and Figure 13 A schematic diagram of the structure when a flexible display screen is assembled with a pressure plate;

[0067] Figure 15 A schematic diagram of the structure of the third embodiment of the flexible display screen provided in this application;

[0068] Figure 16 A schematic diagram of the structure of the pressure plate provided in the third embodiment of this application;

[0069] Figure 17 for Figure 15 and Figure 16 A schematic diagram of the structure when a flexible display screen is assembled with a pressure plate;

[0070] Figure 18 A schematic diagram of the structure of the fourth embodiment of the flexible display screen provided in this application;

[0071] Figure 19 A schematic diagram of the fourth embodiment of the pressure plate provided in this application;

[0072] Figure 20 for Figure 18 and Figure 19 A schematic diagram of the structure when a flexible display screen is assembled with a pressure plate;

[0073] Figure 21 A flowchart illustrating the manufacturing method of the flexible display screen provided in this application;

[0074] Figure 22 for Figure 21 A flowchart illustrating the fabrication of the first sliding connection structure on the support layer;

[0075] Figure 23 To adopt Figure 21 A schematic diagram of the layer structure of a flexible display screen produced by the manufacturing method described above.

[0076] Figure label:

[0077] Flexible display screen 100, folding area 101, outward bending area 102, first connecting area 103, second connecting area 104;

[0078] Display functional layer 110, glass cover 111, optical adhesive layer 112, polarizer 113, display panel 114, back film 115, thermally conductive adhesive 116;

[0079] Support layer 120, first support area 121, second support area 122, first sliding connection structure 130, first slide rail 1210, first groove 1211, fourth slide rail 1220, second rib structure 1230, second embedded part 1231, second connecting part 1232, through groove 1222.

[0080] The machine has a frame 200, a first pressure plate 210, a second pressure plate 220, a second sliding connection structure 201, a second slide rail 2010, a first rib structure 2030, a first embedded part 2031, a first connecting part 2032, a third slide rail 2020, a second groove 2021, and an inner groove 2022.

[0081] Foam adhesive 300. Detailed Implementation

[0082] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art based on this application are within the scope of protection of the present invention.

[0083] like Figures 1 to 4 As shown, Figure 1 This is a schematic diagram of the structure of a flexible display screen in a folded state in related technologies. Figure 2 This is a bottom view of a flexible display screen in its unfolded state, as described in the relevant technology. Figure 3 This is a front view of a flexible display screen in its unfolded state, as described in related technologies. Figure 4This is a schematic diagram illustrating the phenomenon of film layer arching in a flexible display screen in related technologies. In these technologies, the commonly used folding shape of the flexible display screen 100 is a teardrop folding shape. The flexible display screen 100 includes a display function layer 110 and a support layer 120. The support layer 120 is fixedly connected to the first pressure plate 210 and the second pressure plate 220 of the frame 200 via foam adhesive 300. When the first pressure plate 210 and the second pressure plate 220 drive the flexible display screen 100 to fold under the drive of the hinge, their positions relative to the flexible display screen 100 are fixed because the first pressure plate 210 and the second pressure plate 220 are fixed to the hinge and their connection to the flexible display screen 100 is fixed.

[0084] Therefore, as Figure 4 As shown, the strain displacement generated during the folding process of the flexible display screen 100 will accumulate in the folding area 101 and the outer bending area 102, and cannot be effectively released, resulting in poor anti-arching, which in turn causes the separation of the film layers between the support layer 120 and the display function layer 110 of the flexible display screen 100.

[0085] To release the stress and strain generated by folding misalignment between the support layer 120 and the display functional layer 110, avoid localized stress and strain accumulation, and improve the potential separation of film layers caused by anti-arching defects during the folding process of the flexible display screen 100, this application provides a flexible display screen, its manufacturing method, and an electronic device, which will be described in detail below with reference to the accompanying drawings.

[0086] In the first embodiment of this application, as Figures 5 to 7 As shown, Figure 5 This is a schematic diagram of the structure of the first embodiment of the flexible display screen provided in this application. Figure 6 This is a schematic diagram of the structure of the first embodiment of the pressure plate provided in this application. Figure 7 for Figure 5 and Figure 6 A schematic diagram of the structure of a flexible display screen when it is fitted with a pressure plate. This application provides a flexible display screen 100, which is mounted on the frame 200 of an electronic device via a pressure plate. The flexible display screen 100 includes a display function layer 110 and a support layer 120. The display function layer 110 is attached to the support layer 120. A first sliding connection structure 130 is provided on the side of the support layer 120 away from the display function layer 110. The first sliding connection structure 130 is used to achieve a sliding connection with a second sliding connection structure 201 provided on the pressure plate along a direction perpendicular to the folding center line during the folding process of the flexible display screen 100.

[0087] In this embodiment, the support layer 120 of the flexible display screen 100 is connected to the pressure plate of the frame 200 using a sliding connection. A first sliding connection structure 130 is provided on the side of the support layer 120 away from the display functional layer 110, and a second sliding connection structure 201 corresponding to the first sliding connection structure 130 is provided on the side of the pressure plate near the display functional layer 110. This allows the stress and strain generated during the folding process of the flexible display screen 100 to be released through the relative sliding between the support layer 120 and the pressure plate of the frame 200. Compared to the conventional method of fixing the flexible display screen 100 and the frame 200 using foam adhesive 300, the sliding connection formed between the first sliding connection structure 130 of the support layer 120 and the second sliding connection structure 201 of the pressure plate in this embodiment effectively releases the stress and strain generated by the folding misalignment of the support layer 120 and the display functional layer 110, thereby improving the problem of film layer separation caused by poor anti-arching during the folding process of the flexible display screen 100.

[0088] In this embodiment, the correspondence between the first sliding connection structure 130 and the second sliding connection structure 201 is as follows: Figure 8 As shown, Figure 8 This is a structural diagram of the flexible display screen 100 in its folded state. In some embodiments of this application, after the flexible display screen 100 is folded, a folding area 101, two opposing first connecting areas 103, two opposing outward bending areas 102, and two opposing second connecting areas 104 are formed sequentially from the middle to both sides. The two opposing first connecting areas 103 are connected to the overall frame 200 of the electronic device through two symmetrically arranged first pressure plates 210. The two opposing second connecting areas 104 are connected to the overall frame 200 of the electronic device through two symmetrically arranged second pressure plates 220. The first sliding connection structure 130 and the second sliding connection structure 201 are disposed opposite to each other on the support layer 120 and the first pressure plate 210. In other embodiments, the first sliding connection structure 130 and the second sliding connection structure 201 may be disposed opposite to each other on the support layer 120 and the second pressure plate 220, or the first sliding connection structure 130 and the second sliding connection structure 201 may be disposed opposite to each other on the support layer 120, the first pressure plate 210 and the second pressure plate 220.

[0089] In this embodiment, the support layer 120 and the first pressure plate 210 are slidably connected by the first sliding connection structure 130 provided in the first connection area 103 and the second sliding connection structure 201 provided on the first pressure plate 210, so that a sliding connection is formed between the support layer 120 and the first pressure plate 210.

[0090] In this way, when local stress and strain accumulate in the support layer 120 and the display function layer 110, the local stress and strain are transferred between the outer bending area 102 and the folding area 101 through the sliding between the first sliding connection structure 130 on the support layer 120 and the second sliding connection structure 201 on the first pressure plate 210, effectively improving the problem of membrane layer separation caused by poor anti-arching during the folding process.

[0091] The connection method of the first sliding connection structure 130 and the second sliding connection structure 201 in this embodiment is as follows: Figures 5 to 7 As shown, the first sliding connection structure 130 is a first slide rail 1210 arranged along a direction perpendicular to the folding center line, and the first slide rail 1210 is provided with a first groove 1211 structure; the second sliding connection structure 201 is a second slide rail 2010 arranged along a direction perpendicular to the folding center line, and the second slide rail 2010 is provided with a first rib structure 2030 that can be embedded in the first groove 1211 of the first slide rail 1210, and the first rib structure 2030 can be embedded in the first groove 1211 of the first slide rail 1210 and has a clearance fit with the first groove 1211. In this embodiment, the bottom of the first groove 1211 of the first slide rail 1210 is fixedly connected to the support layer 120, and the groove opening is constricted to limit the second slide rail 2010 in the thickness direction of the flexible display screen 100. The first rib structure 2030 of the second slide rail 2010 includes a first connecting part 2032 and a first embedding part 2031. The first connecting part 2032 is fixedly connected to the pressure plate. The first embedding part 2031 is used to cooperate with the first groove 1211 structure of the first slide rail 1210. In other embodiments, the first sliding connection structure 130 and the second sliding connection structure 201 can also adopt other connection methods.

[0092] In this embodiment, the first sliding connection structure 130 and the second sliding connection structure 201 are slidably connected through a first slide rail 1210 and a second slide rail 2010 that is clearance-fitted with the first groove 1211. Specifically, the first sliding connection structure 130 is a first slide rail 1210 arranged perpendicular to the folding center line, and the second sliding connection structure 201 is a second slide rail 2010 arranged perpendicular to the folding center line. When the first slide rail 1210 and the second slide rail 2010 slide, their horizontal movement is restricted to a direction perpendicular to the folding center line. Since the first sliding connection structure 130 and the second sliding connection structure 201 are disposed opposite each other on the support layer 120 and the first pressure plate 210, the horizontal movement between the support layer 120 and the first pressure plate 210 is also restricted to a direction perpendicular to the folding center line.

[0093] Meanwhile, because the opening of the first groove 1211 of the first slide rail 1210 is set in a constricted shape, and the second slide rail 2010 is provided with a triangular first embedding part 2031 with a width greater than the opening of the first groove 1211, the second slide rail 2010 cannot disengage along the thickness direction of the flexible display screen 100 after being embedded in the first slide rail 1210, thus restricting the relative movement of the first slide rail 1210 and the second slide rail 2010 along the thickness direction of the flexible display screen 100. Furthermore, because the first slide rail 1210 and the second slide rail 2010 are respectively fixedly connected to the flexible display screen 100 and the overall frame 200 through the groove bottom and the first connecting part 2032, respectively, along the corresponding support layer 120 and pressure plate, the relative movement between the flexible display screen 100 and the overall frame 200 along the thickness direction of the flexible display screen 100 is restricted. Moreover, the first rib structure 2030 of the second slide rail 2010 can be clearance-fitted with the first groove 1211, ensuring normal sliding between the two. Preferably, the tolerances of the first slide rail 1210 and the second slide rail 2010 can be H7 / g6, H7 / h6, or H8 / f7.

[0094] In the embodiments of this application, such as Figure 8 and Figure 9 As shown, Figure 9 for Figure 5 A bottom view of the first connection method of the flexible display screen. The support layer 120 includes a first support area 121 located in the folding area 101 and the first connection area 103, and a second support area 122 located in the second connection area 104; a first sliding connection structure 130 is disposed at the position of the first support area 121 in the first connection area 103; the first sliding connection structure 130 is disposed on the first support area 121 of the support layer 120, and a second sliding connection structure 201 is correspondingly disposed on the first pressure plate 210, so that the first support area 121 and the first pressure plate 210 are slidably connected. In this embodiment, the second support area 122 of the support layer 120 and the second pressure plate 220 can be fixedly connected by foam adhesive 300.

[0095] A first sliding connection structure 130 disposed in the first support region 121 of the support layer 120 and a second sliding connection structure 201 disposed on the first pressure plate 210 are slidably connected, and the second support region 122 of the support layer 120 is fixedly connected to the second pressure plate 220. This forms a sliding connection between the first support region 121 of the support layer 120 and the first pressure plate 210.

[0096] In this way, when local stress and strain accumulate in the support layer 120 and the display function layer 110, the local stress and strain are transferred between the outer bending area 102 and the folding area 101 through the sliding between the first sliding connection structure 130 on the support layer 120 and the second sliding connection structure 201 on the first pressure plate 210, effectively improving the problem of membrane layer separation caused by poor anti-arching during the folding process.

[0097] In some embodiments of this application, the correspondence between the first sliding connection structure 130 and the second sliding connection structure 201 is not limited to the situation described in the first embodiment of this application. For example... Figure 10 and Figure 11 As shown in the two cases, as long as the mutual transfer of stress and strain between the outer bending region 102 and the folding region 101 can be achieved, it is acceptable.

[0098] In some implementations of this application, such as Figure 8 and Figure 10 As shown, Figure 10 for Figure 5 A bottom view of the second connection method for the flexible display screen. A first sliding connection structure 130 is located at the position of the second support area 122 in the second connection area 104; a second sliding connection structure 201 is located at the position corresponding to the first sliding connection structure 130 on the second pressure plate 220. The first sliding connection structure 130 is located at the position of the second support area 122 of the support layer 120, and the second sliding connection structure 201 is correspondingly located on the second pressure plate 220, so that the second support area 122 and the second pressure plate 220 are slidably connected; and the first support area 121 of the support layer 120 is fixedly connected to the first pressure plate 210.

[0099] like Figure 8 and Figure 10 As shown, the first sliding connection structure 130 is disposed in the second support region 122 of the support layer 120, and the second sliding connection structure 201 is disposed in the second pressure plate 220 at a position corresponding to the first sliding connection structure 130, so that a sliding connection is formed between the second support region 122 of the support layer 120 and the second pressure plate 220. This correspondence in this embodiment can also allow stress and strain to transfer between the outer bending region 102 and the folding region 101 when stress and strain locally accumulate. Therefore, in practical applications, a similar arrangement can also be chosen. Figure 10 The technical solution shown.

[0100] In some implementations of this application, such as Figure 8 and Figure 11 As shown, Figure 11 for Figure 5A bottom view of the third connection method for a flexible display screen. A first sliding connection structure 130 is disposed at the location of the first support area 121 in the first connection area 103 and the second support area 122 in the second connection area 104. A second sliding connection structure 201 is disposed at the corresponding position in the first pressure plate 210 and the second pressure plate 220. Both the first support area 121 and the second support area 122 of the support layer 120 are provided with the first sliding connection structure 130, and both the first pressure plate 210 and the second pressure plate 220 are correspondingly provided with the second sliding connection structure 201, so that the first support area 121 and the first pressure plate 210, as well as the second support area 122 and the second pressure plate 220, are slidably connected. This correspondence in this embodiment can also allow stress and strain to transfer between the outer bending area 102 and the folding area 101 when stress and strain locally accumulate. Therefore, in practical applications, a method such as... Figure 11 The technical solution shown.

[0101] In this embodiment, as Figures 9 to 11 As shown, the first sliding connection structure 130 includes: a plurality of slide rail segments arranged at intervals along the direction of the folding center line; the second sliding connection structure 201 includes: a plurality of mating slide rail segments arranged at intervals along the direction of the folding center line and corresponding one-to-one with each slide rail segment.

[0102] Since the volume of the sliding connection structure is much smaller than the overall volume of the flexible display screen 100 and the mid-frame 200, in order to ensure the reliability of the sliding connection between the flexible display screen 100 and the mid-frame 200, in this embodiment, multiple slide rail segments are sequentially spaced along the folding center line of the flexible display screen 100, and multiple corresponding matching slide rail segments are sequentially spaced along the folding center line of the mid-frame 200. The number of slide rail segments is 3-5, and the length of each slide rail segment is 6-9 mm. The distance between the slide rail segment located at the edge of the support layer 120 and the edge of the support layer 120 is 15-20 mm. The parallel design of multiple slide rail segments ensures that each slide rail segment can support the flexible display screen 100, guaranteeing stable support for the flexible display screen 100 during use. Meanwhile, by increasing the number of slide rails, the sliding connection range between the flexible display screen 100 and the frame 200 of the whole machine is increased, thereby ensuring that the local stress and strain of the flexible display screen 100 can be released quickly, effectively improving the problem of poor arching caused by the accumulation of local stress and strain in the flexible display screen 100, which in turn causes the separation between film layers.

[0103] Meanwhile, the length of the slide rail can meet the sliding distance required for the flexible display screen 100 to release stress and strain, and can also prevent derailment between the first sliding connection structure 130 and the second sliding connection structure 201. The distance between the slide rail and the edge of the support layer 120 can ensure that the slide rail and the support layer 120 will not fall off due to folding during the folding process, further extending the service life of the flexible display screen 100.

[0104] In the first embodiment of this application, a first slide rail 1210 with a first groove 1211 is provided in the first support region 121 of the support layer 120, and a second slide rail 2010 with a first rib structure 2030 on the pressure plate is provided. Specifically, in the first embodiment, the cross-section of the first groove 1211 is triangular, and the first embedded part 2031 on the first rib structure 2030 is a triangular shape corresponding to the first groove 1211. In practical applications, first grooves 1211 and first rib structures 2030 with different shapes can be selected.

[0105] In the second embodiment of this application, as Figures 12 to 14 As shown, Figure 12 This is a structural schematic diagram of the second embodiment of the flexible display screen provided in this application. Figure 13 This is a schematic diagram of the structure of the second embodiment of the pressure plate provided in this application. Figure 14 for Figure 12 and Figure 13 A schematic diagram of the structure when the flexible display screen is engaged with the pressure plate. The top two ends of the first protruding rib have first embedding parts 2031 for embedding and engaging with the first groove 1211. A semi-circular structure can be used as the first embedding part 2031 of the second slide rail 2010. The semi-circular first embedding part 2031 can achieve the same technical effect as the first embodiment of this application when it is embedded in the corresponding semi-circular first groove 1211.

[0106] In the aforementioned embodiments, a first slide rail 1210 with a first groove 1211 on the support layer 120 cooperates with a second slide rail 2010 with a first rib structure 2030 on the pressure plate. In other embodiments, a third slide rail 2020 with a second groove 2021 on the pressure plate cooperates with a fourth slide rail 1220 with a second rib structure 1230 on the support layer 120.

[0107] In the third embodiment of this application, see Figures 15 to 17 , Figure 15 This is a structural schematic diagram of the third embodiment of the flexible display screen provided in this application. Figure 16 This is a structural schematic diagram of the third embodiment of the pressure plate provided in this application. Figure 17 for Figure 15 and Figure 16A schematic diagram of the structure when the flexible display screen is in conjunction with the pressure plate. The second sliding connection structure 201 is a third slide rail 2020 arranged along the direction perpendicular to the folding center line, and the third slide rail 2020 is provided with a second groove 2021 structure; the first sliding connection structure 130 is a fourth slide rail 1220 arranged along the direction perpendicular to the folding center line, and the fourth slide rail 1220 is provided with a second rib structure 1230 that can be embedded into the second groove 2021 structure of the third slide rail 2020, and the second rib structure 1230 can be embedded into the second groove 2021 structure of the third slide rail 2020 and has a clearance fit with the second groove 2021 structure. The bottom of the second groove 2021 structure of the third slide rail 2020 is fixedly connected to the pressure plate, and an inner groove 2022 is provided in the groove along the length direction of the groove. The second rib structure 1230 of the fourth slide rail 1220 includes: a second connecting part 1232 and a second embedding part 1231; the second connecting part 1232 is fixedly connected to the support layer 120, and the second embedding part 1231 is used to cooperate with the second groove 2021 structure of the third slide rail 2020. The second embedding part 1231 of the fourth slide rail 1220 also includes a through groove 1222 that runs through the fourth slide rail 1220 along its length direction.

[0108] In this embodiment, the second sliding connection structure 201 on the pressure plate of the frame 200 is configured as a third slide rail 2020 perpendicular to the folding center line. The third slide rail 2020 is provided with a second groove 2021 structure, so that the third slide rail 2020 can cooperate with the corresponding fourth slide rail 1220 arranged perpendicular to the center line. The fourth slide rail 1220 is provided with a second rib structure 1230 that can be embedded in the inner groove 2022 of the third slide rail 2020, which restricts the movement of the third slide rail 2020 and the fourth slide rail 1220 along the thickness direction of the flexible display screen 100, and ensures the movement between the first sliding connection structure 130 of the support layer 120 and the second connecting sliding structure 201 of the pressure plate perpendicular to the folding center line, further enhancing the efficiency of stress and strain transfer between the outer bending area 102 and the folding area 101. Meanwhile, a through groove 1222 extending along the length of the track is provided on the fourth slide rail 1220, which can effectively reduce the load at the connection between the support layer 120 and the fourth track 1220. Furthermore, it improves the bonding strength between the support layer 120 and the fourth track 1220, and can effectively avoid the problem of track falling off due to excessive track gravity load.

[0109] refer to Figures 9 to 11The connection relationship between the support layer 120 and the pressure plate in the solution provided in the third embodiment of this application is also applicable to the following: the first sliding connection structure 130 and the second sliding connection structure 201 are disposed opposite to each other on the first support area 121 and the first pressure plate 210 of the support layer 120; the first sliding connection structure 130 and the second sliding connection structure 201 are disposed opposite to each other on the second support area 122 and the second pressure plate 220 of the support layer 120; or, the first sliding connection structure 130 and the second sliding connection structure 201 are disposed opposite to each other on the first support area 121 and the second support area 122 of the support layer 120 and the first pressure plate 210 and the second pressure plate 220.

[0110] In the third embodiment of this application, different shapes can be selected as the second embedded part 1231 in the second rib structure 1230 of the fourth slide rail 1220, and a third slide rail 2020 with a second groove 2021 that can cooperate with it can be selected.

[0111] In the fourth embodiment of this application, see Figures 18 to 20 , Figure 18 This is a structural schematic diagram of the fourth embodiment of the flexible display screen provided in this application. Figure 19 This is a structural schematic diagram of the fourth embodiment of the pressure plate provided in this application. Figure 20 for Figure 18 and Figure 19 A schematic diagram of the structure when the flexible display screen is in conjunction with the pressure plate. The inner groove 2022 of the third slide rail 2020 and the second rib structure 1230 of the fourth slide rail 1220 adopt a semi-circular design. At the same time, a through groove 1222 extending along the length of the track is provided on the fourth slide rail 1220. The semi-circular second rib structure 1230 can be embedded in the inner groove 2022, which is also a semi-circular structure, so that the semi-circular third slide rail 2020 and fourth slide rail 1220 can achieve the same effect as in the third embodiment.

[0112] This application also provides a method for manufacturing a flexible display screen 100, applicable to the manufacture of the flexible display screen 100 described in any of the foregoing embodiments. For example... Figure 21 As shown, Figure 21 This is a flowchart of a method for fabricating a flexible display screen. The fabrication method includes the following steps:

[0113] Step 2110: Prepare the display functional layer;

[0114] Step 2120: Prepare a support layer on one side of the display functional layer so that the display functional layer and the support layer are attached together;

[0115] Step 2130: Using a mold injection molding process, the first sliding connection structure is injection molded on the side of the support layer away from the display function layer.

[0116] In this embodiment, when the flexible display screen 100 is folded, strain displacement occurs between the display functional layer 110 and the support layer 120 of the flexible display screen 100. In this embodiment, the display functional layer 110 of the flexible display screen 100 is attached to the support layer 120, and the support layer 120 and the pressure plate are connected by a first sliding connection structure 130 prepared on the support layer 120 and a second sliding connection structure 201 on the pressure plate, forming a sliding connection along a direction perpendicular to the folding center line. Therefore, when the flexible display screen 100 is folded, relative sliding occurs between the support layer 120 and the pressure plate, releasing the stress and strain generated between the support layer 120 and the display functional layer 110 due to folding displacement. This avoids localized stress and strain accumulation, thereby improving the problem of potential separation between film layers caused by poor anti-arching during the folding process of the flexible display screen 100.

[0117] In some embodiments, such as Figure 22 As shown, Figure 22 for Figure 21 The flowchart describes the fabrication of the first sliding connection structure on the support layer. The process involves injection molding the first sliding connection structure 130 onto the side of the support layer 120 away from the display functional layer 110, using a mold injection molding process. The steps include:

[0118] Step 2131: Place the product, including the display function layer and the support layer, into the mold and close the mold.

[0119] Step 2132, vacuum injection;

[0120] Step 2133, UV curing.

[0121] In this embodiment, the first sliding connection structure 130 is fabricated on the support layer using a mold injection molding process, achieving mass production of the flexible display screen 100 of this application. Simultaneously, since ultraviolet curing is required during the production process, quartz glass or acrylic material is used, ensuring the mold's light transmittance is greater than 80%. Furthermore, the injection vacuum degree is less than 20 mbar, allowing the vacuum injection molding material to fully fill the mold. In this embodiment, the mold injection molding process is employed, resulting in fewer process steps and simpler operation, effectively reducing production difficulty and costs.

[0122] In some embodiments of this application, the mold's precision is less than ±20μm during the product placement and mold closing process. Due to the high precision of the mold, the first sliding connection structure 130 formed in the mold also features high dimensional accuracy and high positional accuracy on the support layer 120. Simultaneously, the formed first sliding connection structure 130 exhibits strong stability, reducing the angular torsion of the flexible display screen 100 during folding movements.

[0123] In some embodiments of this application, the mold injection process uses quartz glass or acrylic as the mold injection material. During the mold injection process, the injection vacuum degree is less than 20 mbar. During vacuum injection, the viscosity range of the mold injection material is 9000–19000 mPa·s, the volume shrinkage rate of the mold injection material is less than 2.2%, the adhesion strength between the mold injection material and the support layer 120 is greater than 29 MPa, and the shear strength between the mold injection material and the support layer 120 is greater than 7.8 MPa. A volume shrinkage rate of less than 2.2% ensures dimensional accuracy after curing. Simultaneously, the adhesion strength between the mold injection material and the support layer 120 is greater than 29 MPa, achieving a high adhesion between the vacuum injection material and the surface of the support layer 120. Since the relative movement between the support layer 120 and the pressure plate tends to be shear motion, to prevent the support layer 120 from detaching from the pressure plate due to shear force, it is necessary to meet the requirement that the shear strength between the support layer 120 and the vacuum injection material be greater than 7.8 MPa.

[0124] In some embodiments of this application, during the UV curing process, the hardness of the mold injection material after curing is 70D to 92D; the curing wavelength is 365nm, 405nm, or 470nm; and the curing temperature ranges from 20℃ to 32℃. The hardness of the vacuum injection material after curing is 70D to 92D, which gives the vacuum injection material good anti-friction properties and avoids wear caused by friction between the first sliding connection structure 130 and the second sliding connection structure 201 during the sliding process.

[0125] The flexible display screen 100 manufactured by the method provided in this embodiment of the application, such as... Figure 23 As shown, Figure 23 To adopt Figure 21 A schematic diagram of the structure of the display functional layer prepared by the manufacturing method is shown. The display functional layer 110 in the flexible display screen 100 includes: a glass cover plate 111, an optical adhesive layer 112, a polarizer 113, a display panel 114, a back film 115, and a thermally conductive adhesive 116. The support layer 120 is disposed on one side of the thermally conductive adhesive 116. Therefore, the placement of the support layer 120 does not affect the light emission performance.

[0126] This application also provides an electronic device, including: a flexible display screen 100 and a frame 200 of any of the above embodiments; the flexible display screen 100 is mounted on the frame 200 of the electronic device by a pressure plate.

[0127] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0128] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0129] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A flexible display screen, characterized in that, The flexible display screen is mounted on the frame of the electronic device via a pressure plate; the flexible display screen and the pressure plate are slidably connected to each other via a first sliding connection structure and a second sliding connection structure. The first sliding connection structure and the second sliding connection structure cannot detach along the thickness direction of the flexible display screen after they are engaged; the flexible display screen includes: Display functional layer and support layer; The display function layer is attached to the support layer; The first sliding connection structure is provided on the side of the support layer away from the display functional layer; the first sliding connection structure is used to achieve a sliding connection with the second sliding connection structure provided on the pressure plate in a direction perpendicular to the folding center line during the folding process of the flexible display screen.

2. The flexible display screen according to claim 1, characterized in that, After the flexible display screen is folded, it forms a folding area, two opposing first connecting areas, two opposing outward bending areas, and two opposing second connecting areas from the middle to both sides in sequence. The two opposing first connection areas are connected to the main frame of the electronic device through two symmetrically arranged first pressure plates; the two opposing second connection areas are connected to the main frame of the electronic device through two symmetrically arranged second pressure plates. The first sliding connection structure and the second sliding connection structure are disposed opposite to each other on the support layer and the first pressure plate; and / or, are disposed opposite to each other on the support layer and the second pressure plate.

3. The flexible display screen according to claim 2, characterized in that, The support layer includes a first support region located in the folded area and the first connection area, and a second support region located in the second connection area; The first sliding connection structure is located at the position of the first support area in the first connection area; And / or, located at the position of the second support area in the second connection area; The second sliding connection structure is disposed at the position corresponding to the first pressure plate and the first sliding connection structure; and / or, disposed at the position corresponding to the second pressure plate and the first sliding connection structure.

4. The flexible display screen according to claim 3, characterized in that, The first sliding connection structure is disposed at the location of the first support area of ​​the support layer, and the second sliding connection structure is correspondingly disposed on the first pressure plate, such that the first support area and the first pressure plate are slidably connected; and the second support area of ​​the support layer is fixedly connected to the second pressure plate; or, The first sliding connection structure is disposed at the location of the second support area of ​​the support layer, and the second sliding connection structure is correspondingly disposed on the second pressure plate, such that the second support area and the second pressure plate are slidably connected; and the first support area of ​​the support layer is fixedly connected to the first pressure plate; or, The first support area and the second support area of ​​the support layer are both provided with a first sliding connection structure, and the first pressure plate and the second pressure plate are both provided with a second sliding connection structure, so that the first support area and the first pressure plate, as well as the second support area and the second pressure plate, are slidably connected.

5. The flexible display screen according to claim 1, characterized in that, The first sliding connection structure is a first slide rail arranged along a direction perpendicular to the folding center line, and the first slide rail is provided with a first groove structure; The second sliding connection structure is a second slide rail arranged in a direction perpendicular to the folding center line. The second slide rail is provided with a first rib structure that can be embedded in the first groove structure of the first slide rail. The first rib structure can be embedded in the first groove structure of the first slide rail and is in clearance fit with the first groove structure.

6. The flexible display screen according to claim 5, characterized in that, The bottom of the first groove structure of the first slide rail is fixedly connected to the support layer, and the groove opening is constricted to limit the second slide rail in the thickness direction of the flexible display screen. The first rib structure of the second slide rail includes: a first connecting part and a first embedding part; the first connecting part is fixedly connected to the pressure plate; the first embedding part is used to cooperate with the first groove structure of the first slide rail.

7. The flexible display screen according to claim 1, characterized in that, The second sliding connection structure is a third slide rail arranged along a direction perpendicular to the folding center line, and the third slide rail is provided with a second groove structure; The first sliding connection structure is a fourth slide rail arranged along a direction perpendicular to the folding center line. The fourth slide rail is provided with a second rib structure that can be embedded in the second groove structure of the third slide rail. The second rib structure can be embedded in the second groove structure of the third slide rail and is in clearance fit with the second groove structure.

8. The flexible display screen according to claim 7, characterized in that, The bottom of the second groove structure of the third slide rail is fixedly connected to the pressure plate, and an inner groove is provided in the groove along the length of the groove. The second rib structure of the fourth slide rail includes: a second connecting part and a second embedding part; the second connecting part is fixedly connected to the support layer, and the second embedding part is used to cooperate with the second groove structure of the third slide rail; The second embedded part of the fourth slide rail is provided with a through groove that runs through the length of the fourth slide rail.

9. The flexible display screen according to claim 1, characterized in that, The first sliding connection structure includes: a plurality of slide rail segments arranged at intervals along the direction of the folding center line; the second sliding connection structure includes: a plurality of mating slide rail segments arranged at intervals along the direction of the folding center line and corresponding one-to-one with each slide rail segment. The number of slide rail sections is 3-5; The length of the slide rail section is 6-9mm; The distance between the slide rail section located at the edge of the support layer and the edge of the support layer is 15-20mm.

10. A method for manufacturing a flexible display screen, characterized in that, The method for manufacturing a flexible display screen according to any one of claims 1-9 comprises: Fabrication of the display functional layer; A support layer is prepared on one side of the display functional layer, so that the display functional layer and the support layer are attached together; Using a mold injection molding process, a first sliding connection structure is injection molded on the side of the support layer away from the display function layer.

11. The manufacturing method according to claim 10, characterized in that, The process of using mold injection molding, in which the first sliding connection structure is injection molded on the side of the support layer away from the display function layer, includes: placing the product including the display function layer and the support layer into the mold and closing the mold, vacuum injection molding, and ultraviolet curing.

12. The manufacturing method according to claim 11, characterized in that, During the product placement and mold closing process, the accuracy of the mold is less than ±20μm.

13. The manufacturing method according to claim 11, characterized in that, The mold injection process uses quartz glass or acrylic as the mold injection material. The vacuum degree of the injection molding process is less than 20 mbar. During the vacuum dispensing process, The viscosity range of the mold injection material is 9000~19000 mPa·S; The volume shrinkage rate of the mold injection material is less than 2.2%; The bonding strength between the mold injection material and the support layer is greater than 29 MPa; The shear strength of the mold injection material and the support layer is greater than 7.8 MPa.

14. The manufacturing method according to claim 11, characterized in that, During the UV curing process The mold injection molding process uses a mold injection molding material with a hardness of 70D~92D after curing; The curing wavelength is 365nm, 405nm, or 470nm; The curing temperature range is 20℃~32℃.

15. An electronic device, characterized in that, include: The flexible display screen and the overall frame as described in any one of claims 1-9; The flexible display screen is mounted on the frame of the electronic device via a pressure plate.

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