Middle frame assembly, foldable display module and foldable display device

Abstract

Embodiments of the present application disclose a middle frame assembly, a foldable display module and a foldable display device, and relate to the field of foldable screens, aiming to reduce antenna loss. The specific scheme is: in a three-fold or more than three-fold foldable screen device, a baffle is arranged between the antenna and the flexible circuit board, the baffle is electrically connected with the middle frame, so that the electromagnetic waves projected by the antenna to the flexible circuit board are blocked by the baffle. Alternatively, a shielding layer is arranged on the surface of the flexible circuit board, the shielding layer is electrically connected with the middle frame, so that the electromagnetic waves projected by the antenna to the flexible circuit board are shielded by the shielding layer. Thus, after the foldable screen device is folded, the electromagnetic wave signals passing through the flexible circuit board are blocked, and few electromagnetic wave signals can reach the light-emitting layer in the display panel and be absorbed, and the antenna signal loss problem is improved.

Description

[0001] The present application claims priority to the Chinese patent application No. 202310104021.7, filed on January 16, 2023, entitled “Middle frame assembly, foldable display module and foldable display device”, the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] Embodiments of the present application relate to the field of foldable screens, and in particular to a middle frame assembly, a foldable display module and a foldable display device. BACKGROUND

[0003] With the development of electronic devices, the share of large-screen electronic devices in the consumer market has increased, and foldable electronic devices have received more attention in the market. Various manufacturers have also increased their investment in foldable electronic devices. The electromagnetic environment of foldable electronic devices is very complex, and the complex electromagnetic environment poses a great challenge to researchers. For example, how to reduce the signal loss of a multi-fold phone screen has become a major problem for researchers. SUMMARY

[0004] Embodiments of the present application provide a middle frame assembly, a foldable display module and a foldable display device to improve the problem of absorbing antenna signals and causing antenna signal loss when the display panel is in a folded state.

[0005] To achieve the above-mentioned purpose, the technical solutions adopted by the present application are as follows:

[0006] In a first aspect, a foldable display module is provided, comprising a display panel, a flexible circuit board, a middle frame, an antenna and a baffle. The display panel can be folded in an S shape; the middle frame is connected to one side of the display panel; the display panel and the flexible circuit board are arranged along a preset direction; the antenna is connected to the display panel; the middle frame comprises at least three sub-frames arranged along the preset direction and connected in turn, and the sub-frame closest to the flexible circuit board among the at least three sub-frames is a first sub-frame; the baffle is connected to one end of the first sub-frame close to the flexible circuit board; the baffle is electrically connected to one end of the first sub-frame close to the flexible circuit board; wherein the antenna and the flexible circuit board are respectively located on opposite sides of the baffle, and the outer contour of the projection of the baffle on the antenna area at least partially covers the projection of the flexible circuit board on the antenna area. The electromagnetic wave signal projected by the antenna towards the flexible circuit board can pass through the flexible circuit board, and when the display panel is folded in an S shape, the electromagnetic wave signal passing through the flexible circuit board will be absorbed by the display panel, resulting in antenna signal loss. The baffle can block the electromagnetic wave signal projected by the antenna towards the flexible circuit board, weaken the electromagnetic wave signal passing through the flexible circuit board, reduce the signal absorbed by the display panel, and effectively improve the antenna signal loss. In addition, the baffle is electrically connected to the first sub-frame, and the baffle can block static electricity from conducting through the baffle to the display panel, thereby improving the problem of display panel mura caused by static electricity on the side of the middle frame away from the display panel.

[0007] In combination with the first aspect, in some implementable manners, the baffle is a mesh structure. In this way, the electromagnetic wave signal cannot be projected to the flexible circuit board through the mesh. The baffle has a smaller weight, which can reduce the weight of the foldable display module.

[0008] In combination with the first aspect, in some implementable manners, a surface of the baffle close to the antenna is closed, or a surface of the baffle close to the flexible circuit board is closed. In this way, the baffle has a good blocking effect, and the electromagnetic wave signal of the antenna cannot pass through the closed surface.

[0009] In combination with the first aspect, in some implementable manners, along the direction of the rotation axis of the first sub-frame, the size of the baffle is greater than the size of the flexible circuit board. In this way, the baffle can block the signal of the antenna from being projected to the flexible circuit board, reduce the electromagnetic wave signal passing through the flexible circuit board, and reduce the antenna signal loss.

[0010] In combination with the first aspect, in some implementable manners, along the direction of the rotation axis of the first sub-frame, the baffle extends from one end of the first sub-frame to the other end. In this way, the baffle can block the electromagnetic wave signal of the antenna projected to the flexible circuit board, regardless of the position of the antenna connected to the end of the first sub-frame close to the flexible circuit board. A larger margin is reserved for the installation of the antenna, so that even if there is an error in the installation size of the antenna, the electromagnetic wave projected by the antenna towards the flexible circuit board can be blocked by the baffle, which reduces the antenna signal loss and makes the assembly simpler.

[0011] With reference to the first aspect, in some possible implementation manners, the baffle includes a bending portion and a connecting portion which are electrically connected to each other, and the connecting portion is electrically connected to the first sub-frame at an end close to the flexible circuit board; the bending portion is bent towards the flexible circuit board to surround a surface of the flexible circuit board facing the antenna. In this way, the bending portion has excellent blocking effect on the electromagnetic wave signals projected by the antenna towards the flexible circuit board, and the space occupied by the baffle can be reduced under the same blocking effect, so that the remaining components of the foldable display device can be avoided.

[0012] With reference to the first aspect, in some possible implementation manners, the material of the baffle includes metal. The foregoing materials all have excellent electrical conductivity, so that the baffle electrically connected to the first sub-frame can block the electromagnetic wave transmission.

[0013] With reference to the first aspect, in some possible implementation manners, the baffle is welded to the first sub-frame at an end close to the flexible circuit board; or the baffle is integrally formed with the first sub-frame at an end close to the flexible circuit board. In this way, the baffle has multiple connection modes with the first sub-frame, and the baffle can be prepared together with the middle frame in the process of preparing the middle frame, or the baffle and the prepared middle frame can be assembled.

[0014] With reference to the first aspect, in some possible implementation manners, the first sub-frame includes a carrier plate and a side plate surrounding an outer periphery of the carrier plate, the side plate and the carrier plate form a receiving groove at an end close to the flexible circuit board, and the flexible circuit board is arranged in the receiving groove; one end of the baffle is electrically connected to the carrier plate at an end close to the flexible circuit board, and the other end of the baffle extends towards the side plate. In this way, the receiving groove provides mounting space for the baffle, and the existence of the baffle has little influence on the volume of the foldable display module.

[0015] With reference to the first aspect, in some possible implementation manners, the first sub-frame further includes an insulating member located in the receiving groove, the side plate and / or the carrier plate are connected to the insulating member, and the baffle and the antenna are located on opposite sides of the insulating member. In this way, the insulating member can provide support strength for the side plate and the baffle, and in addition, the existence of the insulating member does not affect the size of the antenna clearance.

[0016] With reference to the first aspect, in some possible implementation manners, the baffle is connected to a surface of the first sub-frame facing the flexible circuit board. In this way, the space between the baffle and the antenna is large, and the antenna is provided with a larger clearance as much as possible.

[0017] In a second aspect, a foldable display module is provided, which comprises a display panel, a flexible circuit board, a middle frame, an antenna and a shielding layer. The display panel can be folded in an S shape; the flexible circuit board is connected to one side of the display panel; the display panel and the flexible circuit board are arranged along a preset direction; the middle frame is connected to the display panel; the middle frame comprises at least three sub-frames which are arranged along the preset direction and are connected in sequence, and a sub-frame closest to the flexible circuit board among the at least three sub-frames is a first sub-frame; the antenna is connected to one end of the first sub-frame close to the flexible circuit board; and the shielding layer is connected to a surface of the flexible circuit board and is electrically connected to one end of the first sub-frame close to the flexible circuit board; wherein, an outer contour of a projection of the shielding layer on an antenna area at least partially covers a projection of the flexible circuit board on the antenna area. Thus, the shielding layer can block the electromagnetic wave signals projected by the antenna towards the flexible circuit board, weaken the electromagnetic wave signals passing through the flexible circuit board, reduce the signals absorbed by the display panel, and effectively improve the loss of the antenna signals.

[0018] In combination with the second aspect, in some implementable manners, the material of the shielding layer comprises metal. The aforementioned materials all have excellent electrical conductivity, so that the shielding layer electrically connected to the first sub-frame can block the electromagnetic wave from passing through.

[0019] In combination with the second aspect, in some implementable manners, the shielding layer is electrically connected to one end of the first sub-frame close to the flexible circuit board through conductive glue. Thus, the conductive glue can increase the contact area between the shielding layer and the first sub-frame, improve the shielding effect of the shielding layer, and the connection mode of the conductive glue is simple in process and has less restrictions on the shapes of the shielding layer and the first sub-frame.

[0020] In a third aspect, a middle frame assembly is provided, which is used for connecting an antenna, a flexible circuit board and a display panel, and comprises: at least three sub-frames used for connecting the display panel so that the display panel can be folded in an S shape; the at least three sub-frames are arranged along a preset direction and are connected in sequence, and the preset direction is the direction in which the display panel and the flexible circuit board are arranged; one sub-frame located at the outermost side among the at least three sub-frames is a first sub-frame; a baffle is electrically connected to one end of the first sub-frame away from the other sub-frames; wherein, in the case that the antenna, the flexible circuit board and the display panel are connected to the middle frame, the antenna and the flexible circuit board are located on opposite sides of the baffle respectively, and an outer contour of a projection of the baffle on an antenna area at least partially covers a projection of the flexible circuit board on the antenna area. Thus, when the middle frame assembly is connected with the antenna and the flexible circuit board, the absorption of the electromagnetic wave signals of the antenna by the flexible circuit board can be effectively reduced, and the loss of the antenna can be reduced.

[0021] In combination with the third aspect, in some implementable manners, the baffle is in a mesh structure, or the surface of the baffle is closed.

[0022] In some implementable manners, the baffle extends from one end of the first sub-frame to the other end along the rotation axis direction of the first sub-frame.

[0023] In some implementable manners, the baffle includes a bending part and a connecting part electrically connected to each other, and the connecting part is electrically connected to the end of the first sub-frame away from the other sub-frames; and the bending part is bent towards the flexible circuit board to enclose the surface of the flexible circuit board facing the antenna in the case that the antenna and the display panel are both connected to the middle frame.

[0024] In some implementable manners, the material of the baffle includes metal.

[0025] In some implementable manners, the baffle is electrically connected and welded to the end of the first sub-frame away from the other sub-frames; or the baffle is integrally formed with the end of the first sub-frame away from the other sub-frames.

[0026] A fourth aspect provides a foldable display device, which includes the foldable display module provided in the first aspect or the second aspect, and a back shell connected to the middle frame away from the display panel. Thus, the foldable display device has less loss of antenna electromagnetic waves. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1a A structural schematic diagram of a foldable display device provided in an embodiment of the present application.

[0028] Figure 1b A structural schematic diagram of a foldable display device provided in an embodiment of the present application. Figure 1a A structural schematic diagram of a foldable display device provided in an embodiment of the present application.

[0029] Figure 2a A structural schematic diagram of a foldable display device provided in an embodiment of the present application.

[0030] Figure 2b A structural schematic diagram of a foldable display device provided in an embodiment of the present application. Figure 2a A sectional schematic diagram of the foldable display device along the Z-Z direction provided in an embodiment of the present application.

[0031] Figure 3a A sectional schematic diagram of the foldable display device along the H-H direction provided in an embodiment of the present application. Figure 1b A sectional schematic diagram of the foldable display device along the H-H direction provided in an embodiment of the present application.

[0032] Figure 3b A sectional schematic diagram of the foldable display device along the H-H direction provided in an embodiment of the present application. Figure 3a An enlarged schematic diagram of the internal structure at C provided in an embodiment of the present application.

[0033] Figure 4a A structural schematic diagram of a first sub-frame and a baffle provided in an embodiment of the present application.

[0034] Figure 4b A schematic diagram of the cross-sectional structure of the first sub-frame and baffle provided in the embodiments of this application.

[0035] Figure 4c This is a schematic diagram of the structure of the baffle and flexible circuit board provided in the embodiments of this application.

[0036] Figure 5 for Figure 3b Enlarged schematic diagram of point G in the middle.

[0037] Figure 6a This is a schematic diagram of a baffle provided in an embodiment of this application.

[0038] Figure 6b This is a schematic diagram of another structure of the baffle provided in an embodiment of this application.

[0039] Figure 6c This is another structural schematic diagram of the baffle provided in the embodiments of this application.

[0040] Figure 7a Another foldable display device provided in the embodiments of this application is Figure 3a An enlarged schematic diagram of the internal structure at point C.

[0041] Figure 7b for Figure 7a A magnified view of point K in the middle.

[0042] In the diagram: 010 - Foldable display device; 011 - First sub-frame; 001 - Side plate; 002 - Carrier plate; 003 - Display panel; 004 - Flexible circuit board; 005 - Bending area; 006 - Flat area; 012 - Second sub-frame; 013 - Third sub-frame; 014 - Flexible display screen; 015 - Back cover; 017 - Antenna; 100 - Foldable display device; 103 - First flat area; 104 - Second flat area; 105 - Third flat area; 101 - First bending area; 102 - Second... Bending area; 110-Flexible display screen; 111-Display panel; 112-Flexible circuit board; 120-Middle frame; 121-First sub-frame; 122-Second sub-frame; 123-Third sub-frame; 124-Carrier board; 125-Side plate; 126-Receiving groove; 127-Insulator; 130-Rear shell; 140-Antenna; 150-Baffle; 151-Bending part; 152-Connecting part; 153-Substrate; 160-Spring piece; 170-Printed circuit board; 180-Shielding layer; 181-Conductive adhesive. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this application clearer, the application will now be described in further detail with reference to the accompanying drawings.

[0044] The terms "first", "second", and the like in the following description are used only for descriptive purposes, and cannot be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined with "first", "second", and the like can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0045] In addition, in the present application, the orientation terms such as "upper", "lower", and the like are defined with respect to the orientation of the components shown in the drawings, and it should be understood that these directional terms are relative concepts, which are used for relative description and clarification, and can be changed accordingly according to the change of the orientation of the components placed in the drawings.

[0046] The embodiments of the present application provide a foldable display device, which can be a product with a display interface such as a tablet computer, a mobile phone, an electronic reader, a remote controller, a personal computer (PC), a notebook computer, a personal digital assistant (PDA), a vehicle-mounted device, a network television, a wearable device, a television, and the like, and a smart watch, a smart bracelet, and the like. The embodiments of the present application do not specially limit the form of the above-mentioned electronic device.

[0047] The embodiments of the present application take the foldable display device as a mobile phone as an example for description.

[0048] Figure 1a A structural schematic diagram of a foldable display device 100 provided by the embodiments of the present application is shown in FIG. 1. Figure 1a The foldable display device 100 includes a flexible display screen 110, a middle frame 120, and a back cover 130, and the flexible display screen 110 and the back cover 130 are respectively located on the opposite sides of the middle frame 120.

[0049] The middle frame 120 is grounded, and exemplarily, the middle frame 120 can be connected with a system ground.

[0050] The middle frame 120 includes a plurality of sub-frames, and the plurality of sub-frames are sequentially rotationally connected.

[0051] In some embodiments, the foldable display device 100 further includes electronic components such as a printed circuit board (PCB), a battery, and a camera, and the foregoing electronic components can be arranged on the middle frame 120.

[0052] For ease of description, the thickness direction of the foldable display device 100 is defined as direction a, which is perpendicular to the surface of the flexible display screen 110 when the foldable display device is in a flattened state. The arrangement direction of the multiple sub-frames when the flexible display screen 110 is in an unfolded state is defined as direction b. Direction a and direction b are perpendicular to each other. That is, the dimensions of the flexible display screen 110 change along direction b before and after folding.

[0053] The foldable display device 100 is an S-shaped folding device, meaning that after the foldable display device 100 is folded, the flexible display screen 110 extends along an S-shaped path.

[0054] Figure 1b for Figure 1a Please refer to the structural diagram of the foldable display device 100 in its folded state. Figure 1b and Figure 1a Before and after folding, both ends of the foldable display device 100 along the b direction are exposed on the surface.

[0055] Figure 2a Please refer to the structural diagram of a foldable display device 010 in the related art. Figure 2a The foldable display device 010 includes a first sub-frame 011, a second sub-frame 012, a third sub-frame 013, a flexible display screen 014, and a rear shell 015. The first sub-frame 011, the second sub-frame 012, and the third sub-frame 013 are rotatably connected in sequence. The first sub-frame 011, the second sub-frame 012, and the third sub-frame 013 are all connected to the flexible display screen 014.

[0056] Figure 2b for Figure 2a Please refer to the cross-sectional diagram along the ZZ direction at point N. Figure 2a and Figure 2b , Figure 2b It shows Figure 2a A cross-sectional diagram at point N shows that the foldable display device 010 can be folded or unfolded along direction b, and the thickness direction of the flexible display screen 014 is direction a. Figure 2b The N-section is parallel to both the a and b directions.

[0057] The first sub-frame 011 includes a side plate 001 and a carrier plate 002, with the side plate 001 surrounding the outer periphery of the carrier plate 002. The two opposite sides of the carrier plate 002 along the b direction are respectively connected to the flexible display screen 014 and the back cover 015.

[0058] The foldable display device 010 also includes an antenna 017, which is connected to the side panel 001. Figure 2b In the example, part of the side plate 001 is the antenna 017.

[0059] The flexible display screen 014 includes a display panel 003 and a flexible printed circuit board (FPC) 004. The display panel 003 is electrically connected to the FPC 004 along one side in the b direction.

[0060] The display panel 003 has two bending regions 005 and three flat regions 006. Two adjacent flat regions 006 are connected by one bending region 005. The three flat regions 006 are connected to the first sub-frame 011, the second sub-frame 012, and the third sub-frame 013, respectively.

[0061] The foldable display device 010 can be folded in an S shape. When the foldable display device 010 is folded, one of the bending regions 005 is exposed on the surface, and the projection of the bending region 005 on the antenna area at least partially overlaps the FPC 004.

[0062] Figure 2b In this case, the electromagnetic wave signals radiated by the antenna 017 can pass through the FPC 004, Figure 2b In this case, the dashed arrow indicates the propagation direction of the electromagnetic wave signals passing through the FPC 004. When the flexible display screen 014 is in the folded state, the electromagnetic wave passing through the FPC 004 is projected on the bending region 005 of the display panel 003. Since the light-emitting layer of the display panel 003 contains a material with a high equivalent resistance, such as indium tin oxides (ITO), the material with a high equivalent resistance can absorb the electromagnetic wave signals radiated by the antenna 017, resulting in a loss of electromagnetic wave signals.

[0063] Therefore, the embodiment of the present application provides a foldable display device 100, which can weaken the electromagnetic wave signals of the antenna passing through the FPC, thereby improving the problem of electromagnetic wave signal loss of the antenna.

[0064] The number of folds of the foldable display device 100 is not limited in the embodiment of the present application. For example, the foldable display device 100 can be three-fold, four-fold, or more. The embodiment of the present application describes the foldable display device 100 as a three-fold device as an example.

[0065] Please refer again to Figure 1a The middle frame 120 is connected to the flexible display screen 110. The middle frame 120 includes a plurality of sub-frames (for example, 121, 122, and 123 in the figure), and the plurality of sub-frames are sequentially rotatably connected.

[0066] The number of sub-frames is three in the embodiment of the present application, which takes the foldable display device 100 as a three-fold device as an example. In the embodiment of the present application, the number of sub-frames is four when the foldable display device 100 is four-fold, and so on. Details are not described herein.

[0067] In the embodiments of the present application, as shown in Figure 1a The three sub-frames are respectively named as a first sub-frame 121, a second sub-frame 122 and a third sub-frame 123. In the b direction, the second sub-frame 122 is rotationally connected with the first sub-frame 121 and the third sub-frame 123 at opposite ends. The first sub-frame 121, the second sub-frame 122 and the third sub-frame 123 are all connected with the flexible display screen 110.

[0068] The first sub-frame 121 is connected with the rear shell 130, and the first sub-frame 121 and the rear shell 130 enclose a containing cavity. The printed circuit boards (PCB), the battery, the camera and other electronic components in the foldable display device 100 are accommodated in the containing cavity.

[0069] The flexible display screen 110 includes a display panel 111, and the display panel 111 includes three flat areas (103, 104, 105) and two bending areas (101, 102). Two adjacent flat areas are connected by a bending area. One flat area is connected with one sub-frame.

[0070] The flat area connected with the first sub-frame 121 is the first flat area 103. The flat area connected with the second sub-frame 122 is the second flat area 104. The flat area connected with the third sub-frame 123 is the third flat area 105.

[0071] The two bending areas are respectively named as a first bending area 101 and a second bending area 102. The first bending area 101 is located between the first flat area 103 and the second flat area 104. The second bending area 102 is located between the second flat area 104 and the third flat area 105.

[0072] Since the foldable display device 100 is an S-shaped folding device, when the foldable display device 100 is in a folded state, the first bending area 101 is wrapped inside the foldable display device 100, and the second bending area 102 is exposed on the surface of the foldable display device 100. The first flat area 103 is opposite to the second flat area 104 and close to each other.

[0073] The foldable display device 100 further includes an antenna 140, which is arranged at one end of the first sub-frame 121 away from the second sub-frame 122. For ease of description, the end of the first sub-frame 121 away from the second sub-frame 122 is defined as the tail end of the first sub-frame 121.

[0074] In some embodiments of the present application, the antenna 140 is a partial conductor of the tail end of the first sub-frame 121.

[0075] The embodiments of the present application do not limit the performance parameters such as frequency, gain, standing wave ratio coefficient, front-to-back ratio and power of the antenna 140, which can be designed according to requirements.

[0076] Figure 3a for Figure 1b The foldable display device 100 shown is a cross-sectional schematic diagram along the HH direction. Figure 3b The foldable display device 100 provided in the embodiments of this application is in Figure 3a Please refer to the enlarged diagram of the internal structure at point C. Figure 3a and Figure 3b The foldable display device 100 also includes a baffle 150, which is electrically connected to the tail end of the first sub-frame 121. The antenna 140 and the flexible display screen 110 are located on opposite sides of the baffle 150. Figure 3b In the diagram, the cross-section where antenna 140 is located is the cross-section of the antenna radiator. The baffle 150 is made of a conductive material. Electromagnetic waves projected by antenna 140 toward flexible display screen 110 can be blocked by baffle 150.

[0077] For example, the baffle 150 is made of a material with excellent electrical conductivity. The material with excellent electrical conductivity has a small equivalent resistance, which makes it difficult for the electromagnetic waves of the antenna 140 to pass through the baffle 150.

[0078] For example, the baffle 150 is made of a metallic material. For instance, metallic materials include copper, gold, silver, nickel, aluminum, magnesium, and their alloys, or stainless steel, etc. Metallic materials have excellent electrical conductivity and can block electromagnetic waves from passing through. Figure 3b As shown, the flexible display screen 110 includes a display panel 111 and a flexible circuit board 112. The side of the display panel 111 near the tail end of the first sub-frame 121 is electrically connected to the flexible circuit board 112, and the flexible circuit board 112 is disposed near the tail end of the first sub-frame 121.

[0079] Among the first sub-frame 121, the second sub-frame 122, and the third sub-frame 123, the first sub-frame 121 is closest to the flexible circuit board 112, and the antenna 140 and the baffle 150 are both electrically connected to the end of the first sub-frame 121 closest to the flexible circuit board 112 (the tail end of the first sub-frame 121).

[0080] In other words, both the antenna 140 and the baffle 150 are connected to the tail end of the first subframe 121. The flexible circuit board 112 and the antenna 140 are located on opposite sides of the baffle 150.

[0081] The outer contour of the projection of the baffle 150 on the area of the antenna 140 at least partially covers the projection of the flexible circuit board 112 on the area of the antenna 140. In this way, the electromagnetic waves projected by the antenna 140 towards the flexible circuit board 112 are blocked by the baffle 150, and the electromagnetic wave signals transmitted through the flexible circuit board 112 are weakened. Thus, when the foldable display device 100 is in the folded state, the electromagnetic wave signals projected to the display panel 111 through the flexible circuit board 112 are reduced, the electromagnetic wave signals absorbed by the material with high equivalent resistance in the display panel 111 are reduced, and the loss of the electromagnetic wave signals of the antenna 140 is reduced.

[0082] The aforementioned material with high equivalent resistance is, for example, indium tin oxide (ITO).

[0083] The aforementioned area of the antenna 140 refers to the projection on the surface of the antenna 140 along the direction of propagation of the electromagnetic waves emitted by the antenna 140.

[0084] The aforementioned outer contour of the projection of the baffle 150 on the area of the antenna 140 refers to the outer contour of the pattern of the projection of the baffle 150 on the area of the antenna 140.

[0085] The aforementioned outer contour of the projection of the baffle 150 on the area of the antenna 140 at least partially covers the projection of the flexible circuit board 112 on the area of the antenna 140 includes but is not limited to the following examples:

[0086] Example one: the size of the baffle 150 is small, and the entire outer contour of the projection of the baffle 150 on the area of the antenna 140 is located within the projection of the flexible circuit board 112 on the area of the antenna 140. Thus, the baffle 150 can block part of the electromagnetic waves projected by the antenna 140 towards the flexible circuit board 112, and reduce the electromagnetic wave signals absorbed by the display panel 111.

[0087] Example two: the size of the baffle 150 is large, but the outer contour of the projection of the baffle 150 on the area of the antenna 140 does not cover the entire projection of the flexible circuit board 112 on the area of the antenna 140. The area surrounded by the outer contour of the projection of the baffle 150 on the area of the antenna 140 is partially located within the projection of the flexible circuit board 112 on the area of the antenna 140, and partially located outside the projection of the flexible circuit board 112 on the area of the antenna 140. Similarly, the baffle 150 can block part of the electromagnetic waves projected by the antenna 140 towards the flexible circuit board 112, and reduce the electromagnetic wave signals absorbed by the display panel 111.

[0088] Example 3: The size of the baffle 150 is large, and the area surrounded by the outer contour of the projection of the baffle 150 in the antenna 140 area covers the entire projection of the flexible circuit board 112 in the antenna 140 area. In this way, the baffle 150 can block almost all the electromagnetic waves projected by the antenna 140 towards the flexible circuit board 112, and the electromagnetic wave signals absorbed by the display panel 111 are almost none, further reducing the loss.

[0089] The embodiments of the present application do not limit the structures of the first sub-frame 121 and the baffle 150, and are set according to the shape of the foldable display device 100 and the shape of the flexible circuit board 112.

[0090] Figure 4a For the structural schematic diagram of the first sub-frame 121 and the baffle 150 provided by the embodiments of the present application, please refer to Figure 4a The first sub-frame 121 includes a carrier plate 124 and a side plate 125, the side plate 125 is connected to the outer periphery of the carrier plate 124, the baffle 150 is electrically connected to one end of the carrier plate 124 close to the flexible circuit board 112, and the antenna 140 is part of the side plate 125.

[0091] The end of the side plate 125 close to the second sub-frame 122 is rotationally connected to the second sub-frame 122, or the end of the carrier plate 124 close to the second sub-frame 122 is rotationally connected to the second sub-frame 122.

[0092] The embodiments of the present application do not limit the connection mode of the baffle 150 and the flexible circuit board 112. For example, the baffle 150 is not directly connected to the flexible circuit board 112, and there is a gap between the two. Or, the baffle 150 is bonded to the flexible circuit board 112. Or, a buffer material is provided between the baffle 150 and the flexible circuit board 112, and the buffer material may, for example, be a sponge.

[0093] The embodiments of the present application do not limit the shape of the carrier plate 124. For example, a through hole can be provided on the carrier plate 124 to avoid components such as printed circuit boards, batteries, and cameras.

[0094] As described above, the baffle 150 can block the electromagnetic waves projected by the antenna 140 towards the flexible circuit board 112, and the carrier plate 124 can also have the effect of blocking the electromagnetic waves projected by the antenna 140, so in some embodiments, the carrier plate 124 can also block part of the electromagnetic waves projected by the antenna 140 towards the flexible circuit board 112. Obviously, even if the area surrounded by the outer contour of the projection of the baffle 150 in the antenna 140 area only covers part of the projection of the flexible circuit board 112 in the antenna 140 area, under the auxiliary blocking effect of the carrier plate 124 and the baffle 150, the electromagnetic wave signals projected by the antenna 140 towards the flexible circuit board 112 can also be well blocked.

[0095] As described above, the flexible circuit board 112 is connected to the display panel 111 at a side close to the tail end of the first sub-frame 121, and a region of the flexible circuit board 112 close to the tail end of the first sub-frame 121 is a bending region, which is connected to the display panel 111.

[0096] Figure 5 For Figure 3b An enlarged view of G in FIG. 12 is shown in FIG. 13. Figure 5 , Figure 5 In FIG. 13, the tail end of the first sub-frame 121 has a receiving groove 126 for receiving the bending region of the flexible circuit board 112 close to the tail end of the first sub-frame 121.

[0097] Exemplarily, the side plate 125 and the carrier plate 124 surround the receiving groove 126. In this way, the side plate 125 and the carrier plate 124 can avoid the flexible circuit board 112.

[0098] It can be understood that embodiments of the present application do not limit the size of the flexible circuit board 112 along the b direction, for example, in an embodiment in which the printed circuit board 170 is close to the display panel 111 at the tail end of the first sub-frame 121, the size of the flexible circuit board 112 along the b direction can be smaller, and the entire flexible circuit board 112 can be located in the receiving groove 126.

[0099] Embodiments of the present application do not limit the cross-sectional shape of the receiving groove 126, which is a face perpendicular to the b direction and the a direction. Each cross section of the receiving groove 126 can be the same or different, which can be set according to the structure of the side plate 125 and the carrier plate 124.

[0100] For example, in a region of the side plate 125 as an antenna 140, the carrier plate 124 is arranged to be spaced apart from the antenna 140, and the shape of the receiving groove 126 surrounded by the carrier plate 124 and the antenna 140 is as shown in FIG. 14. Figure 5

[0101] Figure 5 In FIG. 15, the side plate 125 is an antenna 140, the carrier plate 124 is grounded, and there is a gap between the antenna 140 and the carrier plate 124. Thus, the region surrounded by the carrier plate 124 and the side plate 125 (antenna 140) is a special-shaped groove. The gap between the antenna 140 and the carrier plate 124 is part of the receiving groove 126.

[0102] Figure 5 In FIG. 16, the region where the receiving groove 126 is located is a clearance of the antenna 140. Electromagnetic waves emitted by the antenna 140 can propagate into the receiving groove 126 and pass through the flexible circuit board 112 located in the receiving groove 126.

[0103] ​One end of the baffle 150 is electrically connected to the carrier plate 124, and the other end of the baffle 150 extends towards the antenna 140 (the side plate 125). The baffle 150 covers the gap between the antenna 140 and the carrier plate 124 in the accommodating groove 126. The baffle 150 can block the electromagnetic waves emitted by the antenna 140 from passing through the gap and passing through the flexible circuit board 112.

[0104] As described above, the electromagnetic waves passing through the flexible circuit board 112 can be absorbed by the first bending area 101. In this way, the baffle 150 can avoid the electromagnetic waves being absorbed by the first bending area 101, and reduce the loss of the signal of the antenna 140.

[0105] Since the baffle 150 is electrically connected to the carrier plate 124, the area surrounded by the antenna 140, the baffle 150 and the carrier plate 124 is the clearance area of the antenna 140. The size of the gap between the antenna 140 and the carrier plate 124 directly affects the size of the clearance area of the antenna 140.

[0106] The embodiments of the present application do not limit the shape of the gap, which can be set according to the mechanical properties, processing cost and the like of the first sub-frame 121.

[0107] On the basis of meeting the mechanical properties and electrical properties of the foldable electronic device 100, the size of the gap space can be increased, which is beneficial to improve the bandwidth and efficiency of the antenna 140. When the gap increases, the power of the electromagnetic waves passing through the flexible circuit board 112 increases, and the loss of the antenna signal can increase. The setting of the baffle 150 can avoid the loss of the antenna signal caused by the increase of the gap.

[0108] Exemplarily, the baffle 150 can cover the entire gap between the antenna 140 and the carrier plate 124. In this way, the baffle 150 can better block the electromagnetic waves passing through the flexible circuit board 112.

[0109] Alternatively, in some embodiments, the baffle 150 can only cover part of the area of the gap, and the baffle 150 can also block the electromagnetic waves passing through the flexible circuit board 112.

[0110] In the area of the side plate 125 which is not used as the antenna 140, the embodiments of the present application do not limit the shape of the accommodating groove 126, which can be, for example, Figure 5 the shape shown, or other shapes.

[0111] In the embodiments of the present application, the end of the baffle 150 away from the carrier plate 124 is spaced apart from the side plate 125, and the embodiments of the present application do not limit the distance between the baffle 150 and the side plate 125, in other words, the embodiments of the present application do not limit the distance between the baffle 150 and the side plate 125 in the b direction. The distance can be debugged according to the performance requirements of the antenna 140.

[0112] In some embodiments of the present application, the first sub-frame 121 further comprises an insulating piece 127, which is located in the accommodating groove 126 and connected with the antenna 140 and the baffle 150. The insulating piece 127 supports the antenna 140 and the baffle 150, avoids deformation of the antenna 140 under stress, and increases the mechanical performance of the first sub-frame 121. In addition, the insulating piece 127 does not change the size of the clearance of the antenna 140.

[0113] The material of the insulating piece 127 is not limited in the embodiments of the present application. For example, the material of the insulating piece 127 can be plastic, rubber, etc.

[0114] Figure 4b The first sub-frame 121 and the baffle 150 provided by the embodiments of the present application are shown in the sectional structure diagram of the first sub-frame 121 and the baffle 150. Figure 4b In the embodiments, the antenna 140 is a part of the side plate 125, and the section of the antenna 140 is the same as the section of the side plate 125.

[0115] Figure 4b In the embodiments, along the a direction, the carrier plate 124 has opposite F surfaces and E surfaces, wherein the F surfaces face the display panel 111, and the E surfaces are away from the display panel 111. The distance from the F surface to the antenna 140 is greater than the distance from the E surface to the antenna 140 along the a direction.

[0116] In some embodiments of the present application, as shown in Figure 4b The baffle 150 is connected with the F surface. In other words, the distance from the baffle 150 to the F surface is less than the distance from the baffle 150 to the E surface.

[0117] In some other embodiments of the present application, the baffle 150 can also be connected with the side of the carrier plate 124 close to the antenna 140. In other words, the distance from the baffle 150 to the F surface is greater than the distance from the baffle 150 to the E surface.

[0118] Compared with the embodiment that the baffle 150 is connected with the side of the carrier plate 124 close to the antenna 140, in the embodiment that the baffle 150 is connected with the side of the carrier plate 124 away from the antenna 140, the distance between the baffle 150 and the antenna 140 along the a direction includes the thickness of the carrier plate 124 along the a direction, the space between the baffle 150 and the antenna 140 is larger, the clearance between the baffle 150 and the antenna 140 is larger, and the bandwidth and efficiency of the antenna 140 can be improved.

[0119] The size of the baffle 150 is not limited in the embodiments of the present application, which is related to the size of the flexible circuit board 112.

[0120] Please refer to Figure 4a, the first sub-frame 121 can rotate relative to the second sub-frame 122 around the rotation axis direction to fold or unfold the foldable display device 100. The rotation axis direction is defined as the d direction, and the size of the baffle 150 along the d direction is greater than the size of the flexible circuit board 112 along the d direction.

[0121] Figure 4c A structural diagram of the baffle 150 and the flexible circuit board 112 provided for the embodiment of the present application is shown in FIG. 1C. Figure 4c The size of the baffle 150 along the d direction is greater than the size of the flexible circuit board 112 along the d direction.

[0122] In this way, the baffle 150 electrically connected to the carrier plate 124 can better block the electromagnetic waves projected by the antenna 140 towards the flexible circuit board 112.

[0123] Further, in some embodiments, along the d direction, the baffle 150 extends from one end of the first sub-frame 121 to the other end of the first sub-frame 121, so that the baffle 150 can better block the electromagnetic waves projected by the antenna 140 towards the flexible circuit board 112. In addition, the antenna 140 is connected to any position of the side plate 125 along the d direction, and the electromagnetic waves projected by the antenna 140 towards the flexible circuit board 112 can all be blocked by the baffle 150. A larger margin is reserved for the installation of the antenna 140, so that even if there is an error in the installation size of the antenna 140, the electromagnetic waves projected by the antenna 140 towards the flexible circuit board 112 can also be blocked by the baffle 150, reducing the antenna signal loss while making the assembly simpler.

[0124] The present embodiment does not limit the shape of the outer contour of the baffle 150, which can be limited according to the shape of the opening of the accommodating groove 126 between the carrier plate 124 and the side plate 125 towards the side of the flexible circuit board 112.

[0125] Figure 6a A structural diagram of the baffle 150 provided for the embodiment of the present application is shown in FIG. 1C. Figure 6a and Figure 4b The baffle 150 includes a bent portion 151 and a connecting portion 152, and the bent portion 151 and the connecting portion 152 are electrically connected.

[0126] The connecting portion 152 is connected to the tail end of the first sub-frame 121, and the bent portion 151 is bent towards the flexible circuit board 112 to surround the surface of the flexible circuit board 112 towards the antenna 140. In this way, the bent portion 151 has excellent blocking effect on the electromagnetic waves projected by the antenna 140 towards the flexible circuit board 112, and can reduce the space occupied by the baffle 150 under the same blocking effect, and can avoid other components of the foldable display device 100.

[0127] The shape of the bending portion 151 is not limited in the embodiments of the present application. For example, the cross section of the bending portion 151 can be circular arc, or the cross section of the bending portion 151 can be L-shaped, etc. The aforementioned cross section is parallel to the a direction and the b direction.

[0128] In other embodiments of the present application, the baffle 150 can have other shapes. For example, the aforementioned bending portion 151 can be replaced by a straight plate, a curved plate facing away from the flexible circuit board 112, a special-shaped plate, etc. The shape of the baffle 150 can be set according to the shape of the space used for accommodating the baffle 150 at the tail end of the first sub-frame 121.

[0129] The shape of the connecting portion 152 is not limited in the embodiments of the present application. The shape of the connecting portion 152 can be set according to the connecting mode of the connecting portion 152 and the tail end of the first sub-frame 121 and the shape of the space used for accommodating the connecting portion 152.

[0130] The electrical connection mode of the connecting portion 152 and the tail end of the first sub-frame 121 is not limited in the embodiments of the present application. For example, the connecting portion 152 and the tail end of the first sub-frame 121 are welded, or the connecting portion 152 and the tail end of the first sub-frame 121 are bonded by conductive glue, or the connecting portion 152 and the tail end of the first sub-frame 121 are integrally formed, etc.

[0131] In the embodiment in which the connecting portion 152 and the tail end of the first sub-frame 121 are integrally formed, the connecting portion 152 can be considered as a part of the carrier plate 124, and the bending portion 151 can also be considered as a component of the carrier plate 124 extending between the flexible circuit board 112 and the antenna 140.

[0132] As described above, the material of the baffle 150 is conductive material. In some embodiments of the present application, the baffle 150 can include multiple materials, which can be set according to the connecting mode of the baffle 150 and the first sub-frame 121, etc.

[0133] The material of the bending portion 151 is the same as that of the connecting portion 152, or the material of the bending portion 151 is different from that of the connecting portion 152.

[0134] For example, in the embodiment in which the baffle 150 and the first sub-frame 121 are welded, in order to have good mechanical properties of the welding points, the material of the connecting portion 152 can be selected to have a melting point close to that of the first sub-frame 121, and the material of the bending portion 151 can be selected without such limitation. In this way, the material of the bending portion 151 can be different from that of the connecting portion 152.

[0135] As described above, the outer contour of the projection of the baffle 150 in the antenna 140 region at least partially covers the projection of the flexible circuit board 112 in the antenna 140 region. The inner shape of the projection of the baffle 150 in the antenna 140 region is not limited in the embodiments of the present application.

[0136] Figure 6a In some embodiments, the baffle 150 is a closed structure, that is, the baffle 150 is not provided with a through hole, and the side of the baffle 150 facing the flexible circuit board 112 is a closed surface, and the side of the baffle 150 facing the antenna 140 is also a closed surface. The projection of the baffle 150 in the antenna 140 area is a closed shadow area. The baffle 150 has excellent blocking effect on the electromagnetic waves projected by the antenna 140 towards the flexible circuit board 112.

[0137] Figure 6b Another structural diagram of the baffle 150 provided by the embodiments of the present application is shown in FIG. 15. In some embodiments, the baffle 150 is a mesh structure, and the internal shape of the projection of the baffle 150 in the antenna 140 area is mesh-shaped. Figure 6b The baffle 150 also has a blocking effect on the electromagnetic waves projected by the antenna 140 towards the flexible circuit board 112, and can reduce the weight of the baffle 150, thereby reducing the weight of the foldable display device 100.

[0138] The embodiments of the present application do not limit the size of the mesh hole on the baffle 150, which can be set according to the performance parameters of the antenna 140.

[0139] In some embodiments, the size of the mesh hole on the baffle 150 is less than or equal to one-tenth of the wavelength of the antenna 140 in the working frequency band, so that the baffle 150 also has excellent blocking effect on the electromagnetic waves projected by the antenna 140 towards the flexible circuit board 112.

[0140] The aforementioned mesh hole size refers to the maximum size of the mesh hole in the propagation direction of the electromagnetic waves projected by the antenna 140 towards the flexible circuit board 112.

[0141] It can be understood that in some embodiments, in order to facilitate the connection of the connecting portion 152 of the baffle 150 with the first sub-frame 121, the connecting portion 152 can be a closed plate structure, and the bending portion 151 can be a mesh structure, which is not limited by the embodiments of the present application.

[0142] It can be understood that in some embodiments of the present application, the baffle 150 can not be a mesh structure, for example, the baffle 150 can have a hole, which can avoid other components of the foldable display device 100, and the shape and number of the hole are not limited.

[0143] Figure 6c Another structural diagram of the baffle 150 provided by the embodiments of the present application is shown in FIG. 15. In some embodiments, the baffle 150 is a mesh structure, and the internal shape of the projection of the baffle 150 in the antenna 140 area is mesh-shaped. Figure 6c In some embodiments, the baffle 150 includes a substrate 153, a connecting portion 152 and a bending portion 151, the connecting portion 152 and the bending portion 151 are electrically connected, and the connecting portion 152 and the bending portion 151 are connected to one side of the substrate 153. Figure 6c

[0144] ​The substrate 153 can support the connecting portion 152 and the bending portion 151. In an embodiment in which the material of the connecting portion 152 and the material of the bending portion 151 are soft materials such as copper, the substrate 153 can improve the mechanical properties of the baffle 150.

[0145] The material of the substrate 153 is not limited in the embodiments of the present application. The material of the substrate 153 can be a conductive material or an insulating material. For example, the material of the substrate 153 can be a plastic with low density and high mechanical strength, or the substrate 153 can be a steel material.

[0146] The shape of the substrate 153 is not limited in the embodiments of the present application. For example, the substrate 153 can be a closed plate or a mesh structure.

[0147] The connection manner of the substrate 153 and the connecting portion 152 and the connection manner of the substrate 153 and the bending portion 151 are not limited in the embodiments of the present application. For example, the connection manner can be adhesion.

[0148] As described above, the rotating connection of the second sub-frame 122 and the third sub-frame 123 is connected with the second bending area 102.

[0149] When the foldable display device 100 is in the folded state, the second bending area 102 is bent towards the middle frame 120, and the second bending area 102 is exposed on the surface. The second bending area 102 is close to the tail end of the first sub-frame 121, and the projection of the second bending area 102 in the antenna area overlaps the projection of the flexible circuit board 112 in the antenna area.

[0150] Therefore, the electromagnetic waves projected by the antenna 140 are almost not projected from the area outside the flexible circuit board 112 to the second bending area 102, and the probability of being absorbed by the second bending area 102 is small.

[0151] The distance between the tail end of the antenna 140 and the tail end of the second bending area 102 is not limited in the embodiments of the present application. The tail end of the antenna 140 is the farthest end of the antenna 140 in the b direction, and the tail end of the second bending area 102 is the farthest end of the second bending area 102 in the b direction.

[0152] For example, when the foldable display device 100 is in the folded state, the distance M between the tail end of the antenna 140 and the tail end of the second bending area 102 in the b direction is 0-6mm. For example, the distance M can be 0mm, 1mm, 2mm, 3mm, 3mm, 4mm, 5mm, 6mm, etc. In this way, the electromagnetic waves projected by the antenna 140 can be prevented from bypassing the side plate 125 from the side of the side plate 125 away from the carrier plate 124 and being projected to the second bending area 102 and being absorbed by the second bending area 102, which is beneficial to reduce the loss of the antenna 140.

[0153] Please continue to refer to Figure 3bIn some embodiments of the present application, the foldable display device 100 can further include a spring 160, and the printed circuit board 170 is fed to the antenna 140 through the spring 160.

[0154] When the foldable display device 100 is in the folded state, the electromagnetic wave signals transmitted through the flexible circuit board 112 can be absorbed by the display panel 111 connected to the second sub-frame 122, causing signal loss. Figure 3a and Figure 3b The baffle 150 shown in the figure can block the electromagnetic wave signals projected by the antenna 140 towards the flexible circuit board 112, thereby reducing the signals absorbed by the display panel 111 and reducing the signal loss of the antenna 140. In addition, the baffle 150 can block the charge (such as static electricity) on one side of the rear shell 130 from being transmitted to the flexible display screen 110, thereby improving the problem of screen flicker of the flexible display screen 110 caused by static electricity.

[0155] In some embodiments of the present application, the electromagnetic wave signals projected by the antenna 140 towards the flexible circuit board 112 can also be blocked in other ways.

[0156] Figure 7a Another foldable display device 100 provided in some embodiments of the present application is shown in the enlarged schematic view of the internal structure at position C in Figure 3a . Figure 7b Another foldable display device 100 provided in some embodiments of the present application is shown in the enlarged schematic view of the internal structure at position K in Figure 7a . Please refer to Figure 7a and Figure 7b , the foldable display device 100 further includes a shielding layer 180, and the foldable display device 100 does not include the baffle 150, and the remaining structures can refer to the descriptions in the above Figure 1a , Figure 1b , Figure 3a and Figure 3b . Here, the descriptions will not be repeated.

[0157] Figure 7b In the figure, the shielding layer 180 is connected to the surface of the flexible circuit board 112, and the shielding layer 180 is electrically connected to the tail end of the first sub-frame 121. The outer contour of the projection of the shielding layer 180 in the antenna 140 area at least partially covers the projection of the flexible circuit board 112 in the antenna 140 area.

[0158] Therefore, the shielding layer 180 can block the electromagnetic wave signals projected by the antenna 140 towards the flexible circuit board 112, and when the foldable display device 100 is in the folded state, the electromagnetic wave signals transmitted through the flexible circuit board 112 and then absorbed by the display panel 111 are reduced, thereby reducing the signal loss of the antenna 140.

[0159] Similarly, in the embodiments of the present application, the outer contour of the projection of the shielding layer 180 in the area of the antenna 140 and the projection of the flexible circuit board 112 in the area of the antenna 140 can also have various examples. The outer contour of the projection of the shielding layer 180 in the area of the antenna 140 is similar to that of the baffle 150 in the area of the antenna 140, and thus will not be described here.

[0160] In some embodiments, the shielding layer 180 can cover the entire surface of the flexible circuit board 112 facing the antenna 140. Thus, during the process of connecting the flexible circuit board 112 and the antenna 140, the flexible circuit board 112 and the antenna 140 can have various positional relationships, and the allowed installation error is large.

[0161] Alternatively, in some embodiments, the shielding layer 180 can only cover the area of the flexible circuit board 112 that can be radiated by the electromagnetic wave of the antenna 140. The use of the shielding layer 180 can be saved.

[0162] The material of the shielding layer 180 is a conductive material. For example, the shielding layer 180 includes a material with good electrical conductivity. For example, the material of the shielding layer 180 includes a metal material. For example, the metal material includes copper, gold, silver, nickel, aluminum, magnesium, and alloys thereof or stainless steel, etc. The metal material has good electrical conductivity and can block electromagnetic wave transmission.

[0163] It can be understood that, in some embodiments, the shielding layer 180 also includes a material with good support performance. For example, the shielding layer 180 is formed by overlapping a plurality of layered structures. Among them, the material of part of the layered structures is a material with good electrical conductivity, which can provide a good effect of blocking electromagnetic wave signals, and the material of part of the layered structures is a material with good support performance, which can provide good support. The support performance is not limited by the electrical conductivity, and a material with good support performance but poor electrical conductivity can be selected.

[0164] The embodiments of the present application do not limit the electrical connection mode of the shielding layer 180 and the first sub-frame 121.

[0165] In some embodiments of the present application, the shielding layer 180 and the first sub-frame 121 are connected by conductive glue 181. The contact area between the shielding layer 180 and the first sub-frame 121 can be increased, the shielding effect of the shielding layer 180 can be improved, and the connection mode of the conductive glue 181 is simple in process and has less restrictions on the shape of the shielding layer 180 and the first sub-frame 121.

[0166] In another embodiment of the present application, the shielding layer 180 and the first sub-frame 121 are welded.

[0167] The embodiments of the present application do not limit the shape of the shielding layer 180. In some embodiments of the present application, the shielding layer 180 is a mesh structure.

[0168] The mesh size of the shielding layer 180 is not limited, and can be set according to the performance parameters of the antenna 140. Exemplarily, the mesh size of the shielding layer 180 is less than or equal to one-tenth of the wavelength of the antenna 140 at the working frequency band. In this way, the shielding layer 180 also has excellent blocking effect on the electromagnetic wave projected by the antenna 140 towards the flexible circuit board 112.

[0169] The aforementioned mesh size refers to the maximum size of the mesh in the propagation direction of the electromagnetic wave projected by the antenna 140 towards the flexible circuit board 112.

[0170] In other embodiments, the shielding layer 180 is a closed structure, and no hole structure is arranged in the shielding layer 180, and the shielding layer 180 has excellent shielding effect.

[0171] The embodiments of the present application do not limit the connection mode of the shielding layer 180 and the flexible circuit board 112. For example, the shielding layer 180 is bonded with the flexible circuit board 112. Alternatively, the shielding layer 180 is formed on the surface of the flexible circuit board 112 in a coating manner.

[0172] The embodiments of the present application do not limit the connection mode of the shielding layer 180 and the insulating member 127. In some embodiments, the shielding layer 180 is not directly connected with the insulating member 127, and a gap is formed between the shielding layer 180 and the insulating member 127. In some embodiments, the shielding layer 180 can also abut against the insulating member 127.

[0173] Please refer again to the foldable display device 100 in the folded state shown in Figure 7a , Figure 7a Under the shielding effect of the shielding layer 180, the electromagnetic wave signal transmitted through the flexible circuit board 112 is weak, and the absorption of the electromagnetic wave signal by the display panel 111 is reduced, thereby reducing the signal loss of the antenna 140.

[0174] Please refer to Figure 7a and Figure 3b In some embodiments, the foldable display device 100 can include the baffle 150 in Figure 3b and the shielding layer 180 in Figure 7a , which can further improve the blocking effect on the electromagnetic wave signal projected by the antenna 140 towards the flexible circuit board 112.

[0175] In the embodiments in which the foldable display device 100 includes the baffle 150 and the shielding layer 180, the shielding layer 180 is electrically connected with the baffle 150. Alternatively, the shielding layer 180 is electrically connected with the first sub-frame 121. The embodiments of the present application do not limit this.

[0176] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any change or replacement within the technical scope disclosed by the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A foldable display module, characterized in that, The application relates to a foldable display module. The display panel can be folded in an S shape. The flexible circuit board is connected to one side of the display panel. The display panel and the flexible circuit board are arranged along a preset direction. The middle frame is connected to the display panel. The middle frame comprises at least three sub-frames arranged along the preset direction and connected in sequence. The antenna is connected to one end of the first sub-frame close to the flexible circuit board. The baffle is electrically connected to one end of the first sub-frame close to the flexible circuit board.

2. The foldable display module of claim 1, wherein, The antenna and the flexible circuit board are located on opposite sides of the baffle.

3. The foldable display module of claim 1, wherein, The outer contour of the projection of the baffle on the antenna area at least partially covers the projection of the flexible circuit board on the antenna area. 4.The foldable display module of any one of claims 1-3, wherein, The baffle is a mesh structure. 5.The foldable display module of any one of claims 1-4, wherein, The surface of the baffle close to the antenna is closed, or the surface of the baffle close to the flexible circuit board is closed. 6.The foldable display module of any one of claims 1-5, wherein, The size of the baffle along the rotation axis direction of the first sub-frame is greater than the size of the flexible circuit board. 7.The foldable display module of any one of claims 1-6, wherein, The baffle extends from one end to the other end of the first sub-frame along the rotation axis direction of the first sub-frame. 8.The foldable display module of any one of claims 1-7, wherein, The baffle comprises a bending part and a connecting part electrically connected to each other. The connecting part is electrically connected to one end of the first sub-frame close to the flexible circuit board. 9.The foldable display module of any one of claims 1-8, wherein, The bending part is bent towards the flexible circuit board to surround the surface of the flexible circuit board towards the antenna.

10. The foldable display module of claim 9, wherein, The material of the baffle comprises metal. 11.The foldable display module of any one of claims 1-10, wherein, The baffle is welded to one end of the first sub-frame close to the flexible circuit board.

12. A foldable display module, characterized in that, The baffle is integrally formed with one end of the first sub-frame close to the flexible circuit board. The first sub-frame comprises a carrier plate and a side plate. The side plate surrounds the outer periphery of the carrier plate. The side plate close to the flexible circuit board and the carrier plate form a receiving groove. The flexible circuit board is arranged in the receiving groove. One end of the baffle is electrically connected to one end of the carrier plate close to the flexible circuit board. The other end of the baffle extends towards the side plate. The first sub-frame further comprises an insulating part. The insulating part is located in the receiving groove. The side plate and / or the carrier plate are connected to the insulating part. The baffle and the antenna are located on opposite sides of the insulating part. The baffle is connected to the surface of the first sub-frame towards the flexible circuit board. The foldable display module comprises: The display panel can be folded in an S shape. The flexible circuit board is connected to one side of the display panel. The display panel and the flexible circuit board are arranged along a preset direction. The middle frame is connected to the display panel. The middle frame comprises at least three sub-frames arranged along the preset direction and connected in sequence. The antenna is connected to one end of the first sub-frame close to the flexible circuit board. The shielding layer is connected to the surface of the flexible circuit board and electrically connected to one end of the first sub-frame close to the flexible circuit board. The outer contour of the projection of the shielding layer on the antenna area at least partially covers the projection of the flexible circuit board on the antenna area.

13. The foldable display module of claim 12, wherein, The material of the shielding layer comprises metal.

14. The foldable display module of claim 13, wherein, The shielding layer is electrically connected to the first sub-frame by conductive glue.

15. A middle frame assembly, comprising: The middle frame assembly is used for connecting the antenna, the flexible circuit board and the display panel, and comprises: at least three sub-frames for connecting the display panel so that the display panel can be folded in an S shape; the at least three sub-frames are arranged along a preset direction and are sequentially connected in rotation, the preset direction being the direction in which the display panel and the flexible circuit board are arranged; one of the at least three sub-frames located at the outermost side is a first sub-frame; a baffle electrically connected to one end of the first sub-frame away from the other sub-frames; wherein, in the case that the antenna, the flexible circuit board and the display panel are connected to the middle frame, the antenna and the flexible circuit board are respectively located on opposite sides of the baffle, and the outer contour of the projection of the baffle in the antenna area at least partially covers the projection of the flexible circuit board in the antenna area.

16. The middle frame assembly of claim 15, wherein, The baffle is in a mesh structure, or the surface of the baffle is closed.

17. The middle frame assembly of claim 15 or 16, wherein, The baffle extends from one end of the first sub-frame to the other end along the direction of the rotation axis of the first sub-frame.

18. The middle frame assembly of any one of claims 15-17, wherein, The baffle comprises a bending part and a connecting part electrically connected to each other, and the connecting part is electrically connected to one end of the first sub-frame away from the other sub-frames; in the case that the antenna and the display panel are both connected to the middle frame, the bending part is bent towards the flexible circuit board to surround the surface of the flexible circuit board facing the antenna.

19. The middle frame assembly of any one of claims 15-18, wherein, The material of the baffle comprises metal.

20. The middle frame assembly of any one of claims 15-19, wherein, The baffle is electrically connected to one end of the first sub-frame away from the other sub-frames by welding; or The baffle is integrally formed with one end of the first sub-frame away from the other sub-frames.

21. A foldable display device, comprising: The foldable display device comprises a rear shell and the foldable display module according to any one of claims 1-14, and the rear shell is connected to one side of the middle frame away from the display panel.

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