Middle frame assembly, foldable display module and foldable display equipment

Abstract

The embodiment of the invention discloses a middle frame assembly, a foldable display module and foldable display equipment, relates to the field of foldable screens, and aims to reduce antenna loss. According to the specific scheme, in the foldable screen equipment with three or more folds, a baffle is arranged between an antenna and a flexible circuit board, and the baffle is electrically connected with a middle frame, so that electromagnetic waves projected to the flexible circuit board by the antenna are blocked by the baffle. Or a shielding layer is arranged on the surface of the flexible circuit board and is electrically connected with the middle frame, so that the electromagnetic waves projected to the flexible circuit board by the antenna are shielded by the shielding layer. Therefore, after the foldable screen equipment is folded, an electromagnetic wave signal penetrating through the flexible circuit board is blocked, a few electromagnetic wave signals can reach the light-emitting layer in the display panel and then are absorbed, and the problem of antenna signal loss is improved.

Description

Middle frame assembly, foldable display module and foldable display device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on January 16, 2023, with application number 202310104021.7 and application name “Middle frame assembly, foldable display module and foldable display device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The 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 Art

[0003] With the development of electronic devices, large-screen devices have captured a growing share of the consumer market. Foldable devices have also attracted increasing attention in the market, leading to increased investment by manufacturers in these devices. The electromagnetic environment of foldable devices is very complex, posing significant challenges for researchers. For example, minimizing signal loss in multi-fold mobile phone screens has become a major concern for researchers.

[0004] Summary of the Invention

[0005] Embodiments of the present application provide a middle frame assembly, a foldable display module, and a foldable display device to improve the problem of antenna signal loss caused by absorption of antenna signals when the display panel is in a folded state.

[0006] To achieve the above objectives, this application adopts the following technical solutions:

[0007] 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 is foldable 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 in a preset direction; the antenna is connected to the display panel; the middle frame includes at least three sub-frames arranged in the preset direction and rotatably connected in sequence, the sub-frame closest to the flexible circuit board being the first sub-frame; the baffle is connected to an end of the first sub-frame near the flexible circuit board; the baffle is electrically connected to an end of the first sub-frame near the flexible circuit board; wherein the antenna and the flexible circuit board are located on opposite sides of the baffle, and the outer contour of the baffle's projection 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 toward the flexible circuit board will pass through the flexible circuit board. 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 blocks electromagnetic wave signals projected from the antenna toward the flexible circuit board, weakening the electromagnetic wave signals that pass through the flexible circuit board, reducing the signal absorbed by the display panel, and effectively reducing antenna signal loss. Furthermore, the baffle is electrically connected to the first sub-frame and blocks static electricity from passing through the baffle and being conducted to the display panel, thus alleviating the problem of display panel distortion caused by static electricity on the side of the middle frame facing away from the display panel.

[0008] In conjunction with the first aspect, in some possible implementations, the baffle has a mesh structure. This prevents electromagnetic wave signals from passing through the mesh and projecting onto the flexible circuit board. The baffle is also lightweight, which can reduce the weight of the foldable display module.

[0009] In conjunction with the first aspect, in some achievable embodiments, the baffle is enclosed near the surface of the antenna, or the baffle is enclosed near the surface of the flexible circuit board. Thus, the baffle has a good blocking effect, and the electromagnetic wave signal of the antenna cannot penetrate the enclosed surface.

[0010] In conjunction with the first aspect, in some possible implementations, the baffle is larger than the flexible circuit board along the rotation axis of the first subframe. Thus, the baffle can block antenna signals from reaching the flexible circuit board, reducing electromagnetic wave signals that pass through the flexible circuit board and reducing antenna signal loss.

[0011] In conjunction with the first aspect, in some implementations, the baffle extends from one end of the first subframe to the other along the rotational axis of the first subframe. Thus, regardless of where the antenna is connected to the end of the first subframe near the flexible printed circuit board, the baffle can block the antenna's electromagnetic wave signals projected toward the flexible printed circuit board. This provides a large margin for antenna installation. Even if there are errors in the antenna's installation dimensions, the baffle can block electromagnetic waves projected toward the flexible printed circuit board, reducing antenna signal loss and simplifying assembly.

[0012] In conjunction with the first aspect, in some possible implementations, the baffle includes a bent portion and a connecting portion that are electrically connected to each other. The connecting portion is electrically connected to an end of the first subframe proximal to the flexible circuit board. The bent portion curves toward the flexible circuit board to surround the surface of the flexible circuit board facing the antenna. As a result, the bent portion effectively blocks electromagnetic wave signals projected by the antenna toward the flexible circuit board. While maintaining the same blocking effect, the space occupied by the baffle can be reduced, allowing it to be positioned away from other components of the foldable display device.

[0013] In conjunction with the first aspect, in some achievable embodiments, the baffle is made of a metal. The aforementioned materials all have excellent electrical conductivity, so that the baffle electrically connected to the first subframe can block electromagnetic waves from penetrating.

[0014] In conjunction with the first aspect, in some achievable embodiments, the baffle is welded to the end of the first sub-frame proximal to the flexible printed circuit board; alternatively, the baffle is integrally formed with the end of the first sub-frame proximal to the flexible printed circuit board. Thus, the baffle and the first sub-frame can be connected in a variety of ways. The baffle can be manufactured during the middle frame manufacturing process, or the baffle can be assembled with the completed middle frame.

[0015] In conjunction with the first aspect, in some possible implementations, the first sub-frame includes a carrier plate and a side plate. The side plate is disposed around the periphery of the carrier plate. An end of the side plate proximate to the flexible printed circuit board forms a receiving groove with the carrier plate, and the flexible printed circuit board is disposed within the receiving groove. One end of the baffle is electrically connected to the end of the carrier plate proximate to the flexible printed circuit board, and the other end extends toward the side plate. Thus, the receiving groove provides space for the baffle to be installed, and the presence of the baffle has a minimal impact on the volume of the foldable display module.

[0016] In conjunction with the first aspect, in some possible implementations, the first subframe further includes an insulating member, the insulating member being located within the receiving groove, the side panels and / or the carrier being connected to the insulating member, and the baffle and the antenna being located on opposite sides of the insulating member. Thus, the insulating member can provide support strength for the side panels and the baffle, and the presence of the insulating member does not affect the size of the antenna clearance area.

[0017] In conjunction with the first aspect, in some achievable embodiments, the baffle is connected to the surface of the first subframe facing the flexible circuit board, thereby increasing the space between the baffle and the antenna, thereby providing a larger clearance area for the antenna as much as possible.

[0018] In a second aspect, a foldable display module is provided, comprising a display panel, a flexible circuit board, a middle frame, an antenna, and a shielding layer. The display panel is foldable 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 predetermined direction; the middle frame is connected to the display panel; the middle frame includes at least three sub-frames arranged along the predetermined direction and rotatably connected in sequence, the sub-frame closest to the flexible circuit board being the first sub-frame; the antenna is connected to an end of the first sub-frame that is adjacent to the flexible circuit board; the shielding layer is connected to the surface of the flexible circuit board and is electrically connected to an end of the first sub-frame that is adjacent to the flexible circuit board; wherein the outer contour of the projection of the shielding layer on the antenna region at least partially covers the projection of the flexible circuit board on the antenna region. Thus, the shielding layer can block electromagnetic wave signals projected by the antenna toward the flexible circuit board, weaken electromagnetic wave signals that pass through the flexible circuit board, reduce signals absorbed by the display panel, and effectively improve antenna signal loss.

[0019] In conjunction with the second aspect, in some achievable embodiments, the shielding layer is made of a metal. The aforementioned materials all have excellent electrical conductivity, so that the shielding layer electrically connected to the first subframe can block electromagnetic waves from penetrating.

[0020] In conjunction with the second aspect, in some achievable embodiments, the shielding layer is electrically connected to the end of the first sub-frame proximal to the flexible circuit board via conductive adhesive. Thus, the conductive adhesive can increase the contact area between the shielding layer and the first sub-frame, improving the shielding effectiveness of the shielding layer. Furthermore, the conductive adhesive connection method is simple to manufacture and imposes few restrictions on the shapes of the shielding layer and the first sub-frame.

[0021] In a third aspect, a middle frame assembly is provided, which is used to connect an antenna, a flexible circuit board, and a display panel. The middle frame assembly includes: at least three sub-frames for connecting to the display panel to enable the display panel to be folded in an S-shape; the at least three sub-frames are arranged along a predetermined direction and are rotatably connected in sequence, the predetermined direction being the direction in which the display panel and the flexible circuit board are arranged; the outermost sub-frame of the at least three sub-frames is a first sub-frame; and a baffle is electrically connected to an end of the first sub-frame that is away from the other sub-frames. When 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, and the outer contour of the baffle's projection on the antenna area at least partially covers the projection of the flexible circuit board on the antenna area. Thus, when the middle frame assembly is connected to the antenna and the flexible circuit board, the flexible circuit board can effectively reduce the absorption of electromagnetic wave signals by the antenna, thereby reducing antenna loss.

[0022] In combination with the third aspect, in some feasible embodiments, the baffle is a mesh structure, or the surface of the baffle is closed.

[0023] In combination with the third aspect, in some achievable manners, along the rotation axis direction of the first sub-frame, the baffle extends from one end to the other end of the first sub-frame.

[0024] In combination with the third aspect, in some feasible embodiments, the baffle includes a bending portion and a connecting portion that are electrically connected to each other, and the connecting portion is electrically connected to an end of the first sub-frame away from the other sub-frames; when the antenna and the display panel are both connected to the middle frame, the bending portion bends toward the flexible circuit board to surround the surface of the flexible circuit board facing the antenna.

[0025] In conjunction with the third aspect, in some achievable embodiments, the material of the baffle includes metal.

[0026] In combination with the third aspect, in some achievable manners, the baffle is electrically connected to and welded to an end of the first sub-frame away from other sub-frames; or, the baffle is integrally formed with an end of the first sub-frame away from other sub-frames.

[0027] In a fourth aspect, a foldable display device is provided, comprising a rear case and any one of the foldable display modules provided in the first or second aspects, wherein the rear case is connected to a side of the middle frame away from the display panel. Thus, the antenna of the foldable display device exhibits minimal electromagnetic wave loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG1a is a schematic structural diagram of a foldable display device provided in an embodiment of the present application.

[0029] FIG1b is a schematic structural diagram of the foldable display device in FIG1a in a folded state.

[0030] FIG2 a is a schematic structural diagram of a foldable display device in the related art.

[0031] FIG2 b is a schematic cross-sectional view of point N in FIG2 a along the ZZ direction.

[0032] FIG3 a is a schematic cross-sectional view of the foldable display device shown in FIG1 b along the HH direction.

[0033] FIG3 b is an enlarged schematic diagram of the internal structure of a foldable display device provided in an embodiment of the present application at point C in FIG3 a .

[0034] FIG4 a is a schematic structural diagram of a first sub-frame and a baffle provided in an embodiment of the present application.

[0035] FIG4 b is a schematic diagram of the cross-sectional structure of the first sub-frame and the baffle provided in an embodiment of the present application.

[0036] FIG4 c is a schematic structural diagram of a baffle and a flexible circuit board provided in an embodiment of the present application.

[0037] FIG5 is an enlarged schematic diagram of point G in FIG3b.

[0038] FIG6 a is a schematic structural diagram of a baffle provided in an embodiment of the present application.

[0039] FIG6 b is another structural schematic diagram of the baffle provided in an embodiment of the present application.

[0040] FIG6 c is another structural schematic diagram of the baffle provided in an embodiment of the present application.

[0041] FIG7 a is an enlarged schematic diagram of the internal structure of another foldable display device provided in an embodiment of the present application at position C in FIG3 a .

[0042] FIG7 b is an enlarged schematic diagram of point K in FIG7 a .

[0043] In the figure: 010-foldable display device; 011-first sub-frame; 001-side panel; 002-carrier board; 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; 125 - side panel; 126 - receiving groove; 127 - insulating member; 130 - back cover; 140 - antenna; 150 - baffle; 151 - bending part; 152 - connecting part; 153 - substrate; 160 - spring clip; 170 - printed circuit board; 180 - shielding layer; 181 - conductive adhesive. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of this application clearer, this application will be further described in detail below with reference to the accompanying drawings.

[0045] Hereinafter, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified with "first," "second," etc., may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0046] In addition, in this application, directional terms such as "upper" and "lower" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they can change accordingly according to changes in the orientation of the components in the drawings.

[0047] 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 e-reader, a remote control, a personal computer (PC), a laptop computer, a personal digital assistant (PDA), an in-vehicle device, an Internet-connected television, a wearable device, a television, and a smart display wearable product, such as a smart watch or a smart bracelet. The embodiments of the present application do not impose any particular restrictions on the form of the above-mentioned electronic devices.

[0048] The embodiments of the present application are described by taking a mobile phone as an example of a foldable display device.

[0049] Figure 1a is a structural schematic diagram of a foldable display device 100 provided in an embodiment of the present application. Referring to Figure 1a, the foldable display device 100 includes a flexible display screen 110, a middle frame 120 and a rear shell 130. The flexible display screen 110 and the rear shell 130 are respectively located on opposite sides of the middle frame 120.

[0050] The middle frame 120 is grounded. For example, the middle frame 120 may be connected to a system ground.

[0051] The middle frame 120 includes a plurality of sub-frames, and the plurality of sub-frames are rotatably connected in sequence.

[0052] In some embodiments, the foldable display device 100 further includes electronic components such as printed circuit boards (PCBs), batteries, and cameras, and the aforementioned electronic components can be disposed on the middle frame 120 .

[0053] For ease of description, the thickness direction of the foldable display device 100 is defined as direction a. That is, direction a 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. Directions a and b are perpendicular to each other. That is, the dimension of the flexible display screen 110 along direction b changes before and after folding.

[0054] The foldable display device 100 is an S-shaped foldable device, that is, after the foldable display device 100 is folded, the flexible display screen 110 extends along an S-shaped path.

[0055] Figure 1b is a structural schematic diagram of the foldable display device 100 in Figure 1a in a folded state. Please refer to Figure 1b and Figure 1a. Before and after the foldable display device 100 is folded, both opposite ends of the foldable display device 100 along direction b are exposed to the surface.

[0056] FIG2a is a schematic structural diagram of a foldable display device 010 in the related art. Referring to FIG2a , 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 cover 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.

[0057] Figure 2b is a schematic cross-sectional view taken at point N in Figure 2a along the ZZ direction. Please refer to Figure 2a and Figure 2b together. Figure 2b shows a schematic cross-sectional view taken at point N in Figure 2a. The foldable display device 010 can be folded or unfolded along the b direction. The thickness direction of the flexible display screen 014 is the a direction. The N section of Figure 2b is parallel to the a direction and the b direction.

[0058] The first sub-frame 011 includes side panels 001 and a carrier 002. The side panels 001 surround the outer periphery of the carrier 002. The two opposite sides of the carrier 002 along direction b are connected to the flexible display screen 014 and the rear cover 015 respectively.

[0059] The foldable display device 010 further includes an antenna 017, which is connected to the side panel 001. In the example of FIG2b, a portion of the side panel 001 is the antenna 017.

[0060] The flexible display screen 014 includes a display panel 003 and a flexible printed circuit board (FPC) 004. One side of the display panel 003 along direction b is electrically connected to the flexible printed circuit board 004.

[0061] The display panel 003 has two bending regions 005 and three straight regions 006. Two adjacent straight regions 006 are connected by a bending region 005. The three straight regions 006 are connected to the first subframe 011, the second subframe 012 and the third subframe 013 respectively.

[0062] 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 bending region 005 at least partially overlaps with the projection of the flexible circuit board 004 in the antenna area.

[0063] In Figure 2b, the electromagnetic wave signal radiated by antenna 017 will pass through flexible circuit board 004. The dotted arrow in Figure 2b indicates the propagation direction of the electromagnetic wave signal passing through flexible circuit board 004. When flexible display screen 014 is in a folded state, the electromagnetic wave passing through flexible circuit board 004 will be projected onto the bending region 005 of display panel 003. Because the light-emitting layer of display panel 003 contains a material with a high equivalent resistance, such as indium tin oxide (ITO), this material with a high equivalent resistance will absorb the electromagnetic wave signal radiated by antenna 017, resulting in electromagnetic wave signal loss.

[0064] Therefore, the embodiment of the present application provides a foldable display device 100, which can weaken the electromagnetic wave signal of the antenna through the flexible circuit board, thereby improving the problem of electromagnetic wave signal loss of the antenna.

[0065] The embodiment of the present application does not limit the number of folds of the foldable display device 100. For example, the foldable display device 100 can be folded three times, four times, or more times. The embodiment of the present application describes the foldable display device 100 as a three-fold device as an example.

[0066] Please refer to FIG. 1 a again. The middle frame 120 is connected to the flexible display screen 110 . The middle frame 120 includes a plurality of sub-frames (eg, 121 , 122 , and 123 in the figure). The plurality of sub-frames are connected in sequence by rotation.

[0067] In the embodiment of the present application, the foldable display device 100 is a tri-fold device as an example, and the number of sub-frames is three. In the embodiment of the foldable display device 100 being a quadruple fold device, the number of sub-frames is four, and so on, which will not be repeated here.

[0068] In the embodiment of the present application, as shown in FIG1a , the three subframes are designated as a first subframe 121, a second subframe 122, and a third subframe 123. Along the b direction, the second subframe 122 is pivotally connected to the first subframe 121 and the third subframe 123 at opposite ends. The first subframe 121, the second subframe 122, and the third subframe 123 are all connected to the flexible display 110.

[0069] Among them, the first sub-frame 121 is connected to the back shell 130, and the first sub-frame 121 and the back shell 130 are surrounded by a receiving cavity, and the printed circuit boards (PCBs), batteries, cameras and other electronic components in the foldable display device 100 are accommodated in the receiving cavity.

[0070] The flexible display screen 110 includes a display panel 111. The display panel 111 includes three straight areas (103, 104, 105) and two bent areas (101, 102). Two adjacent straight areas are connected by a bent area. One straight area is connected to one sub-frame.

[0071] The straight area connected to the first subframe 121 is the first straight area 103 , the straight area connected to the second subframe 122 is the second straight area 104 , and the straight area connected to the third subframe 123 is the third straight area 105 .

[0072] The two bending regions are named as the first bending region 101 and the second bending region 102. The first bending region 101 is located between the first straight region 103 and the second straight region 104. The second bending region 102 is located between the second straight region 104 and the third straight region 105.

[0073] Since the foldable display device 100 is an S-shaped foldable device, when the foldable display device 100 is in the folded state, the first bending region 101 is wrapped inside the foldable display device 100, and the second bending region 102 is exposed on the surface of the foldable display device 100. It is opposite to the first straight region 103 and the second straight region 104 and is close to each other.

[0074] The foldable display device 100 further includes an antenna 140, which is disposed at an end of the first subframe 121 away from the second subframe 122. For ease of description, the end of the first subframe 121 away from the second subframe 122 is defined as the tail end of the first subframe 121.

[0075] In some embodiments of the present application, the antenna 140 is a portion of the conductor at the tail end of the first sub-frame 121 .

[0076] The embodiment of the present application does not limit the performance parameters of the antenna 140, such as frequency, gain, standing wave ratio coefficient, front-to-back ratio, and power, and can be designed according to requirements.

[0077] Figure 3a is a schematic cross-sectional view of the foldable display device 100 shown in Figure 1b along the HH direction, and Figure 3b is an enlarged schematic view of the internal structure of the foldable display device 100 provided in an embodiment of the present application at position C in Figure 3a. Please refer to Figures 3a and 3b together. The foldable display device 100 also includes a baffle 150, which is electrically connected to the rear end of the first sub-frame 121. The antenna 140 and the flexible display 110 are respectively located on opposite sides of the baffle 150. In Figure 3b, the cross-section where the antenna 140 is located is the cross-section of the antenna radiator. The material of the baffle 150 is a conductive material. The electromagnetic waves projected by the antenna 140 toward the flexible display 110 can be blocked by the baffle 150.

[0078] Exemplarily, the material of the baffle 150 includes a material with excellent electrical conductivity. The material with excellent electrical conductivity has a small equivalent resistance, so that the electromagnetic waves of the antenna 140 are not easy to pass through the baffle 150 .

[0079] Exemplarily, the material of the baffle 150 includes a metal material. For example, metal materials include copper, gold, silver, nickel, aluminum, magnesium, alloys thereof, or stainless steel. Metal materials have excellent electrical conductivity and can block the transmission of electromagnetic waves. As shown in Figure 3b, the flexible display 110 includes a display panel 111 and a flexible circuit board 112. The side of the display panel 111 near the rear end of the first subframe 121 is electrically connected to the flexible circuit board 112, and the flexible circuit board 112 is positioned near the rear end of the first subframe 121.

[0080] 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 one end of the first sub-frame 121 close to the flexible circuit board 112 (the tail end of the first sub-frame 121 ).

[0081] In other words, the antenna 140 and the baffle 150 are both connected to the rear end of the first sub-frame 121. The flexible circuit board 112 and the antenna 140 are located on opposite sides of the baffle 150, respectively.

[0082] The outer contour of the projection of the baffle 150 in the area of ​​the antenna 140 at least partially covers the projection of the flexible circuit board 112 in the area of ​​the antenna 140. Thus, the electromagnetic waves projected from the antenna 140 toward 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. Consequently, when the foldable display device 100 is in the folded state, the electromagnetic wave signals projected through the flexible circuit board 112 to the display panel 111 are reduced, and the electromagnetic wave signals absorbed by the higher equivalent resistance materials within the display panel 111 are reduced, thereby reducing the electromagnetic wave signal loss from the antenna 140.

[0083] The aforementioned material with a relatively high equivalent resistance is, for example, indium tin oxide (ITO).

[0084] The aforementioned antenna 140 area refers to the projection on the surface of the antenna 140 along the propagation direction of the electromagnetic radiation emitted by the antenna 140.

[0085] The outer contour of the projection of the baffle 150 on the antenna 140 region refers to the outer contour of the pattern of the projection of the baffle 150 on the antenna 140 region.

[0086] 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, including but not limited to the following examples:

[0087] Example 1: The baffle 150 is relatively small, and the entire outer contour of the projection of the baffle 150 onto the antenna 140 region lies within the projection of the flexible circuit board 112 onto the antenna 140 region. Thus, the baffle 150 can partially block electromagnetic waves projected from the antenna 140 toward the flexible circuit board 112, reducing the electromagnetic wave signals absorbed by the display panel 111.

[0088] Example 2: Although baffle 150 is relatively large, the area enclosed by the outer contour of the baffle 150's projection on the antenna 140 region does not entirely cover the projection of the flexible printed circuit board 112 on the antenna 140 region. Part of the area enclosed by the outer contour of the baffle 150's projection on the antenna 140 region lies within the projection of the flexible printed circuit board 112 on the antenna 140 region, while another part lies outside the projection of the flexible printed circuit board 112 on the antenna 140 region. Similarly, baffle 150 can partially block electromagnetic waves projected from the antenna 140 toward the flexible printed circuit board 112, reducing the electromagnetic wave signals absorbed by the display panel 111.

[0089] Example 3: Baffle 150 is relatively large, and the outer contour of its projection on the antenna 140 area covers the entire projection of the flexible circuit board 112 on the antenna 140 area. As a result, baffle 150 blocks nearly all electromagnetic waves projected from antenna 140 toward the flexible circuit board 112, leaving virtually no electromagnetic wave signals absorbed by the display panel 111, further reducing losses.

[0090] The embodiment of the present application does not limit the structures of the first sub-frame 121 and the baffle 150 , and they are configured according to the shape of the foldable display device 100 and the shape of the flexible circuit board 112 .

[0091] Figure 4a is a structural schematic diagram of the first sub-frame 121 and the baffle 150 provided in an embodiment of the present application. Referring to Figure 4a, the first sub-frame 121 includes a carrier 124 and a side panel 125. The side panel 125 is connected to the periphery of the carrier 124. The baffle 150 is electrically connected to one end of the carrier 124 close to the flexible circuit board 112. The antenna 140 is part of the side panel 125.

[0092] One end of the side plate 125 close to the second sub-frame 122 is rotatably connected to the second sub-frame 122 , or one end of the carrier plate 124 close to the second sub-frame 122 is rotatably connected to the second sub-frame 122 .

[0093] The embodiment of the present application does not limit the connection method between the baffle 150 and the flexible circuit board 112. For example, the baffle 150 and the flexible circuit board 112 may not be directly connected, but rather have a gap therebetween. Alternatively, the baffle 150 and the flexible circuit board 112 may be bonded together. Alternatively, a cushioning material, such as sponge, may be provided between the baffle 150 and the flexible circuit board 112.

[0094] The embodiment of the present application does not limit the shape of the carrier 124. For example, through holes can be provided on the carrier 124 to avoid components such as a printed circuit board, a battery, and a camera.

[0095] As described above, the baffle 150 can block electromagnetic waves projected by the antenna 140 toward the flexible printed circuit board 112. The carrier 124 can also function to block electromagnetic waves projected by the antenna 140. Therefore, in some embodiments, the carrier 124 can also partially block electromagnetic waves projected by the antenna 140 toward the flexible printed circuit board 112. Clearly, even if the area enclosed by the outer contour of the projection of the baffle 150 on the antenna 140 region only covers a portion of the projection of the flexible printed circuit board 112 on the antenna 140 region, the auxiliary blocking effect of the carrier 124 and the baffle 150 can still effectively block the electromagnetic wave signals projected by the antenna 140 toward the flexible printed circuit board 112.

[0096] As mentioned above, the flexible circuit board 112 is connected to one side of the display panel 111 near the rear end of the first sub-frame 121 . The area of ​​the flexible circuit board 112 near the rear end of the first sub-frame 121 is a bending area, which is connected to the display panel 111 .

[0097] FIG5 is an enlarged schematic diagram of point G in FIG3b. Please refer to FIG5 . In FIG5 , the rear end of the first sub-frame 121 has a receiving groove 126 . The receiving groove 126 is used to receive the bending area of ​​the flexible circuit board 112 near the rear end of the first sub-frame 121 .

[0098] For example, the side panels 125 and the carrier panel 124 are arranged to form a receiving groove 126 . In this way, the side panels 125 and the carrier panel 124 can avoid the flexible printed circuit board 112 .

[0099] It can be understood that the embodiment of the present application does not limit the size of the flexible circuit board 112 along the b direction. For example, in an embodiment where the printed circuit board 170 and the display panel 111 are close to the rear 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 accommodating groove 126.

[0100] The embodiment of the present application does not limit the cross-sectional shape of the receiving groove 126. The cross-sectional shape is a plane perpendicular to both the direction b and the direction a. Each cross-sectional shape of the receiving groove 126 can be the same or different and can be configured according to the structure of the side plate 125 and the carrier plate 124.

[0101] For example, in the area of ​​the side plate 125 serving as the antenna 140 , the carrier plate 124 and the antenna 140 are spaced apart from each other. The shape of the receiving groove 126 formed by the carrier plate 124 and the antenna 140 is shown in FIG. 5 .

[0102] In Figure 5 , side plate 125 is antenna 140, and carrier plate 124 is grounded. A gap exists between antenna 140 and carrier plate 124. Thus, the area enclosed by carrier plate 124 and side plate 125 (antenna 140) forms a special-shaped slot. The gap between antenna 140 and carrier plate 124 forms part of receiving slot 126.

[0103] 5 , the area where the receiving groove 126 is located is a clear area of ​​the antenna 140 . The electromagnetic waves emitted by the antenna 140 will propagate into the receiving groove 126 and pass through the flexible circuit board 112 located in the receiving groove 126 .

[0104] One end of baffle 150 is electrically connected to carrier 124, and the other end of baffle 150 extends toward antenna 140 (side plate 125). Baffle 150 covers the gap between antenna 140 and carrier 124 in receiving slot 126. Baffle 150 blocks electromagnetic waves emitted by antenna 140 from passing through the gap and also blocks electromagnetic waves from passing through flexible printed circuit board 112.

[0105] As mentioned above, electromagnetic waves passing through the flexible printed circuit board 112 may be absorbed by the first bending area 101. In this way, the baffle 150 can prevent electromagnetic waves from being absorbed by the first bending area 101, thereby reducing the signal loss of the antenna 140.

[0106] Since the baffle 150 is electrically connected to the carrier 124, the area enclosed by the antenna 140, the baffle 150, and the carrier 124 is the clearance area of ​​the antenna 140. The size of the gap between the antenna 140 and the carrier 124 directly affects the size of the clearance area of ​​the antenna 140.

[0107] The embodiment of the present application does not limit the shape of the gap, and can be set according to the mechanical properties of the first sub-frame 121, processing costs, etc.

[0108] While maintaining the mechanical and electrical performance requirements of the foldable electronic device 100, the gap size can be increased, which helps improve the bandwidth and efficiency of the antenna 140. As the gap increases, the power of electromagnetic waves passing through the flexible circuit board 112 increases, potentially increasing antenna signal loss. The provision of the baffle 150 can mitigate antenna signal loss caused by the increased gap.

[0109] For example, the baffle 150 may cover the entire gap between the antenna 140 and the carrier 124 . In this way, the baffle 150 may effectively block electromagnetic waves from passing through the flexible printed circuit board 112 .

[0110] Alternatively, in some embodiments, the baffle 150 may only cover a portion of the gap, and the baffle 150 may also block electromagnetic waves from passing through the flexible printed circuit board 112 .

[0111] In the area of ​​the side plate 125 that does not serve as the antenna 140 , the embodiment of the present application does not limit the shape of the receiving groove 126 . For example, it can be the shape shown in FIG. 5 or other shapes.

[0112] In the embodiment of the present application, the baffle 150 is spaced apart from the side plate 125 at one end away from the carrier plate 124. The embodiment of the present application does not limit the distance between the baffle 150 and the side plate 125. In other words, along the b direction, the embodiment of the present application does not limit the distance between the baffle 150 and the side plate 125. Adjustments can be made based on the performance requirements of the antenna 140.

[0113] In some embodiments of the present application, first sub-frame 121 further includes an insulating member 127, which is located within receiving groove 126. Antenna 140 and baffle 150 are both connected to insulating member 127. Insulating member 127 supports antenna 140 and baffle 150, preventing deformation of antenna 140 under load and improving the mechanical performance of first sub-frame 121. Insulating member 127 also does not change the clearance area of ​​antenna 140.

[0114] The embodiment of the present application does not limit the material of the insulating member 127 . For example, the insulating member 127 may be made of plastic, rubber, or the like.

[0115] Figure 4b is a schematic diagram of the cross-sectional structure of the first sub-frame 121 and the baffle 150 provided in an embodiment of the present application. In Figure 4b, the antenna 140 is part of the side plate 125, and the cross section of the antenna 140 is the same as the cross section of the side plate 125.

[0116] 4b, along direction a, the carrier 124 has opposite surfaces F and E, wherein surface F faces the display panel 111 and surface E faces away from the display panel 111. Along direction a, the distance from surface F to the antenna 140 is greater than the distance from surface E to the antenna 140.

[0117] In some embodiments of the present application, as shown in FIG4 b , the baffle 150 is connected to the surface F. In other words, the distance from the baffle 150 to the surface F is smaller than the distance from the baffle 150 to the surface E.

[0118] In some other embodiments of the present application, the baffle 150 may also be connected to a side of the carrier 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.

[0119] Compared with the embodiment in which the baffle 150 is connected to the side of the carrier 124 close to the antenna 140, in the embodiment in which the baffle 150 is connected to the side of the carrier 124 far from the antenna 140, the distance between the baffle 150 and the antenna 140 along the direction a includes the thickness of the carrier 124 along the direction a, the space between the baffle 150 and the antenna 140 is larger, and the clearance area between the baffle 150 and the antenna 140 is larger, which can improve the bandwidth and efficiency of the antenna 140.

[0120] The embodiment of the present application does not limit the size of the baffle 150 , which is related to the size of the flexible circuit board 112 .

[0121] 4a again, the first subframe 121 can rotate relative to the second subframe 122 about the rotation axis to fold or unfold the foldable display device 100. The rotation axis direction is defined as direction d, and the dimension of the baffle 150 along direction d is greater than the dimension of the flexible circuit board 112 along direction d.

[0122] Figure 4c is a schematic structural diagram of the baffle 150 and the flexible circuit board 112 provided in an embodiment of the present application. Referring to Figure 4c, the dimension of the baffle 150 along the d direction is larger than the dimension of the flexible circuit board 112 along the d direction.

[0123] In this way, the baffle 150 electrically connected to the carrier 124 can effectively block the electromagnetic waves projected from the antenna 140 toward the flexible printed circuit board 112 .

[0124] Furthermore, in some embodiments, the baffle 150 extends from one end of the first sub-frame 121 to the other end of the first sub-frame 121 along the d direction. Thus, the baffle 150 can better block electromagnetic waves projected by the antenna 140 toward the flexible printed circuit board 112. Furthermore, regardless of whether the antenna 140 is connected to the side panel 125 at any position along the d direction, the electromagnetic waves projected by the antenna 140 toward the flexible printed circuit board 112 can be blocked by the baffle 150. This allows for a large margin for the installation of the antenna 140. Even if there are errors in the installation dimensions of the antenna 140, the electromagnetic waves projected toward the flexible printed circuit board 112 can be blocked by the baffle 150, reducing antenna signal loss while simplifying assembly.

[0125] The embodiment of the present application does not limit the shape of the outer contour of the baffle 150 , and it can be limited according to the shape of the opening of the receiving groove 126 between the carrier plate 124 and the side plate 125 toward the flexible circuit board 112 .

[0126] FIG6 a is a structural schematic diagram of a baffle 150 provided in an embodiment of the present application. Please refer to FIG6 a and FIG4 b together. The baffle 150 includes a bending portion 151 and a connecting portion 152 . The bending portion 151 and the connecting portion 152 are electrically connected.

[0127] The connecting portion 152 is connected to the rear end of the first sub-frame 121, and the bent portion 151 bends toward the flexible circuit board 112 to surround the surface of the flexible circuit board 112 facing the antenna 140. As a result, the bent portion 151 effectively blocks electromagnetic waves projected from the antenna 140 toward the flexible circuit board 112. While maintaining the same blocking effect, the space occupied by the baffle 150 can be reduced, allowing for the remaining components of the foldable display device 100 to be avoided.

[0128] The embodiment of the present application does not limit the shape of the bending portion 151. For example, the cross section of the bending portion 151 may be arc-shaped, or L-shaped, etc. The cross section is parallel to both the a direction and the b direction.

[0129] In other embodiments of the present application, the baffle 150 may have other shapes. For example, the aforementioned bent portion 151 may be replaced by a straight plate, a bent plate that bends away from the flexible circuit board 112, a special-shaped plate, or the like, and may be configured based on the shape of the space at the rear end of the first sub-frame 121 for accommodating the baffle 150.

[0130] The embodiment of the present application does not limit the shape of the connecting portion 152 , and the shape of the connecting portion 152 may be determined based on the connection method between the connecting portion 152 and the tail end of the first sub-frame 121 and the shape of the space for accommodating the connecting portion 152 .

[0131] The embodiment of the present application does not limit the electrical connection method between the connecting portion 152 and the tail end of the first sub-frame 121. 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 using conductive adhesive, or the connecting portion 152 and the first sub-frame 121 are integrally formed, etc.

[0132] In the embodiment where the connecting portion 152 and the first sub-frame 121 are integrally formed, the connecting portion 152 can be considered as a part of the carrier 124 , and the bent portion 151 can also be considered as a component of the carrier 124 extending between the flexible printed circuit board 112 and the antenna 140 .

[0133] As mentioned above, the baffle 150 is made of a conductive material. In some embodiments of the present application, the baffle 150 may include a variety of materials, which may be configured according to the connection method between the baffle 150 and the first sub-frame 121 .

[0134] The material of the bent portion 151 is the same as that of the connecting portion 152 , or the material of the bent portion 151 is different from that of the connecting portion 152 .

[0135] For example, in an embodiment where the baffle 150 is welded to the first sub-frame 121 , in order to ensure good mechanical properties of the weld, the connecting portion 152 may be made of a material with a melting point close to that of the first sub-frame 121 , and the material selection of the bending portion 151 may not be subject to this restriction. In this way, the material of the bending portion 151 may be different from that of the connecting portion 152 .

[0136] As described above, the outer contour of the projection of the baffle 150 in the antenna 140 area at least partially covers the projection of the flexible circuit board 112 in the antenna 140 area. This embodiment of the application does not limit the inner shape of the projection of the baffle 150 in the antenna 140 area.

[0137] In Figure 6a, baffle 150 is a closed structure. In other words, baffle 150 has no through-holes. The side of baffle 150 facing the flexible printed circuit board 112 is a closed surface, and the side of baffle 150 facing the antenna 140 is also a closed surface. The shadow cast by baffle 150 on the antenna 140 area is a closed shadow area. Baffle 150 effectively blocks electromagnetic waves projected from antenna 140 toward flexible printed circuit board 112.

[0138] FIG6 b is a schematic diagram of another structure of a baffle 150 according to an embodiment of the present application. Referring to FIG6 b , baffle 150 has a mesh structure, and the inner shape of the projection of baffle 150 in the area of ​​antenna 140 is a mesh. Baffle 150 also blocks electromagnetic waves projected from antenna 140 toward flexible circuit board 112, and can reduce the weight of baffle 150, thereby reducing the weight of foldable display device 100.

[0139] The embodiment of the present application does not limit the size of the mesh hole on the baffle 150 and can be set according to the performance parameters of the antenna 140.

[0140] In some embodiments, the size of the mesh holes on the baffle 150 is less than or equal to one tenth of the wavelength of the antenna 140 at the working frequency band. In this way, the baffle 150 also has an excellent blocking effect on the electromagnetic waves projected by the antenna 140 toward the flexible circuit board 112 .

[0141] 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 toward the flexible printed circuit board 112 .

[0142] It is understandable that in some embodiments, in order to facilitate the connection between the connecting portion 152 of the baffle 150 and 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 in this embodiment of the present application.

[0143] It is understandable that in some embodiments of the present application, the baffle 150 may not be a mesh structure. For example, the baffle 150 may have holes, and the holes can avoid other components of the foldable display device 100. The shape and number of the holes are not limited.

[0144] Figure 6c is another structural schematic diagram of the baffle 150 provided in an embodiment of the present application. Please refer to Figure 6c. In Figure 6c, 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 both connected to one side of the substrate 153.

[0145] The substrate 153 can support the connecting portion 152 and the bending portion 151 . In an embodiment where the connecting portion 152 and the bending portion 151 are made of soft materials such as copper, the substrate 153 can improve the mechanical properties of the baffle 150 .

[0146] The embodiment of the present application does not limit the material of the substrate 153. 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 plastic with low density and high mechanical strength, or the substrate 153 can be steel, etc.

[0147] The embodiment of the present application does not limit the shape of the substrate 153. For example, the substrate 153 may be a closed plate or a mesh structure.

[0148] The embodiment of the present application does not limit the connection method between the substrate 153 and the connecting portion 152 , and the connection method between the substrate 153 and the bending portion 151 , and they may be, for example, adhesive bonding.

[0149] As described above, the rotational connection between the second sub-frame 122 and the third sub-frame 123 is connected to the second bending area 102 .

[0150] When the foldable display device 100 is in the folded state, the second bending region 102 bends toward the middle frame 120, exposing the second bending region 102 on the surface. The second bending region 102 is relatively close to the rear end of the first sub-frame 121, and the projection of the second bending region 102 in the antenna area overlaps with the projection of the flexible circuit board 112 in the antenna area.

[0151] Therefore, the electromagnetic waves projected by the antenna 140 are hardly projected from areas outside the flexible printed circuit board 112 to the second bending region 102 , and the probability of being absorbed by the second bending region 102 is low.

[0152] The embodiment of the present application does not limit the distance between the tail end of the antenna 140 and the tail end of the second bending zone 102. The tail end of the antenna 140 is the farthest end of the antenna 140 along direction b, and the tail end of the second bending zone 102 is the farthest end of the second bending zone 102 along direction b.

[0153] For example, when the foldable display device 100 is in the folded state, the distance M between the trailing end of the antenna 140 and the trailing end of the second bending zone 102 along direction b is 0-6 mm. For example, the distance M can be 0 mm, 1 mm, 2 mm, 3 mm, 3 mm, 4 mm, 5 mm, 6 mm, and so on. This prevents electromagnetic waves projected by the antenna 140 from bypassing the side panel 125 away from the carrier 124 and projecting to the second bending zone 102, where they are absorbed by the second bending zone 102, thereby reducing losses in the antenna 140.

[0154] Please continue to refer to FIG. 3 b . In some embodiments of the present application, the foldable display device 100 may further include a spring 160 , and the printed circuit board 170 is fed to the antenna 140 through the spring 160 .

[0155] When the foldable display device 100 is folded, electromagnetic wave signals passing through the flexible circuit board 112 are absorbed by the display panel 111 connected to the second sub-frame 122, resulting in losses. The baffle 150 shown in Figures 3a and 3b blocks electromagnetic wave signals projected by the antenna 140 toward the flexible circuit board 112, thereby reducing the signal absorbed by the display panel 111 and reducing signal loss at the antenna 140. Furthermore, the baffle 150 prevents charges (e.g., static electricity) on one side of the rear housing 130 from being transferred to the flexible display 110, thereby alleviating the problem of static electricity causing screen distortion on the flexible display 110.

[0156] In some embodiments of the present application, the electromagnetic wave signal projected by the antenna 140 toward the flexible circuit board 112 may also be blocked by other means.

[0157] Figure 7a is an enlarged schematic diagram of the internal structure of another foldable display device 100 provided in an embodiment of the present application, as viewed at position C in Figure 3a. Figure 7b is an enlarged schematic diagram of position K in Figure 7a. Referring to Figures 7a and 7b, foldable display device 100 further includes a shielding layer 180, but does not include a baffle 150. For the remaining structure, please refer to the relevant descriptions in Figures 1a, 1b, 3a, and 3b above, and will not be repeated here.

[0158] 7b, shielding layer 180 is connected to the surface of flexible circuit board 112 and electrically connected to the tail end of first subframe 121. The outer contour of shielding layer 180 projected on antenna 140 area at least partially covers the projection of flexible circuit board 112 on antenna 140 area.

[0159] Therefore, the shielding layer 180 can block the electromagnetic wave signal projected by the antenna 140 toward the flexible circuit board 112. When the foldable display device 100 is in a folded state, the electromagnetic wave signal absorbed by the display panel 111 after passing through the flexible circuit board 112 is reduced, thereby reducing the signal loss of the antenna 140.

[0160] Similarly, in the embodiment of the present application, the outer contour of the projection of the shielding layer 180 in the antenna 140 area and the projection of the flexible circuit board 112 in the antenna 140 area may also have multiple examples, which are the same as the outer contour of the projection of the above-mentioned baffle 150 in the antenna 140 area, and will not be repeated here.

[0161] In some embodiments, the shielding layer 180 may 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 may have various positional relationships, and the allowable installation error is large.

[0162] Alternatively, in some embodiments, the shielding layer 180 may only cover the area of ​​the flexible circuit board 112 that may be irradiated by the electromagnetic waves of the antenna 140. This can save material for the shielding layer 180.

[0163] Shielding layer 180 is made of a conductive material. For example, shielding layer 180 comprises a material with good electrical conductivity. For example, shielding layer 180 comprises a metal material. Examples of metal materials include copper, gold, silver, nickel, aluminum, magnesium, alloys thereof, or stainless steel. Metal materials have excellent electrical conductivity and can block the transmission of electromagnetic waves.

[0164] It is understood that in some embodiments, shielding layer 180 also includes a material with good support properties. For example, shielding layer 180 may be formed by overlapping multiple layers. Part of the layered structure may be made of a material with good electrical conductivity, thereby effectively blocking electromagnetic wave signals, while part of the layered structure may be made of a material with good support properties, thereby providing excellent support. The support properties are not limited by the electrical conductivity, and materials with good support properties but poor electrical conductivity may be used.

[0165] The embodiment of the present application does not limit the electrical connection method between the shielding layer 180 and the first sub-frame 121 .

[0166] In some embodiments of the present application, the shielding layer 180 is connected to the first sub-frame 121 via a conductive adhesive 181. This can increase the contact area between the shielding layer 180 and the first sub-frame 121, thereby improving the shielding effect of the shielding layer 180. Furthermore, the connection method of the conductive adhesive 181 is simple to process and has few restrictions on the shapes of the shielding layer 180 and the first sub-frame 121.

[0167] In some other embodiments of the present application, the shielding layer 180 is welded to the first sub-frame 121 .

[0168] The embodiment of the present application does not limit the shape of the shielding layer 180. In some embodiments of the present application, the shielding layer 180 is a mesh structure.

[0169] The mesh size of shielding layer 180 is not limited and can be set based on the performance parameters of antenna 140. For example, the mesh size of shielding layer 180 is less than or equal to one-tenth of the wavelength of antenna 140 in the operating frequency band. In this way, shielding layer 180 also effectively blocks electromagnetic waves projected by antenna 140 toward flexible circuit board 112.

[0170] 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 toward the flexible printed circuit board 112 .

[0171] In other embodiments, the shielding layer 180 is a closed structure, and no hole structure is provided in the shielding layer 180 , and the shielding layer 180 has an excellent shielding effect.

[0172] The embodiment of the present application does not limit the connection method between the shielding layer 180 and the flexible circuit board 112. For example, the shielding layer 180 is bonded to the flexible circuit board 112. Alternatively, the shielding layer 180 is formed on the surface of the flexible circuit board 112 by coating.

[0173] The embodiment of the present application does not limit the connection method between the shielding layer 180 and the insulating member 127. In some embodiments, the shielding layer 180 and the insulating member 127 are not directly connected, and a gap is provided between the shielding layer 180 and the insulating member 127. In some embodiments, the shielding layer 180 and the insulating member 127 may also abut.

[0174] Please refer to FIG. 7 a again. When the foldable display device 100 shown in FIG. 7 a is in the folded state, the electromagnetic wave signal passing through the flexible circuit board 112 is weakened due to the shielding effect of the shielding layer 180 . The electromagnetic wave signal absorbed by the display panel 111 is reduced, thereby reducing the signal loss of the antenna 140 .

[0175] Please refer to Figure 7a and Figure 3b together. In some embodiments, the foldable display device 100 may include the baffle 150 in Figure 3b and the shielding layer 180 in Figure 7a, which can further enhance the blocking effect of the electromagnetic wave signal projected by the antenna 140 toward the flexible circuit board 112.

[0176] In an embodiment where the foldable display device 100 includes a baffle 150 and a shielding layer 180, the shielding layer 180 is electrically connected to the baffle 150. Alternatively, the shielding layer 180 is electrically connected to the first sub-frame 121. This embodiment of the present application does not limit this.

[0177] The above is only a specific embodiment of the present application, but the scope of protection of this application is not limited to this. Any changes or substitutions within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A foldable display module, characterized in that, Comprising: A display panel, which can be S-shaped folded; A flexible circuit board, connected to one side of the display panel; The display panel and the flexible circuit board are arranged along a preset direction; A middle frame, connected to the display panel; the middle frame includes at least three sub-frames arranged along the preset direction and sequentially rotationally connected, and the sub-frame closest to the flexible circuit board among the at least three sub-frames is the first sub-frame; An antenna, connected to one end of the first sub-frame close to the flexible circuit board; A baffle, 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 in the antenna area at least partially covers the projection of the flexible circuit board in the antenna area.

2. The foldable display module according to claim 1, wherein The baffle is a mesh structure.

3. The foldable display module according to claim 1, 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.

4. The foldable display module according to any one of claims 1-3, characterized in that Along the rotation axis direction of the first sub-frame, the size of the baffle is larger than that of the flexible circuit board.

5. The foldable display module according to any one of claims 1-4, characterized in that, Along the rotation axis direction of the first sub-frame, the baffle extends from one end of the first sub-frame to the other end.

6. The foldable display module according to any one of claims 1-5, wherein, The baffle includes a bent portion and a connecting portion that are electrically connected to each other, and the connecting portion is electrically connected to one end of the first sub-frame close to the flexible circuit board; the bent portion bends towards the flexible circuit board to surround the surface of the flexible circuit board facing the antenna.

7. The foldable display module according to any one of claims 1-6, characterized in that The material of the baffle includes metal.

8. The foldable display module according to any one of claims 1-7, wherein The baffle is welded to one end of the first sub-frame close to the flexible circuit board; or The baffle and one end of the first sub-frame close to the flexible circuit board are integrally formed.

9. The foldable display module according to any one of claims 1-8, characterized in that, The first sub-frame includes a carrier plate and side plates, the side plates surround the outer periphery of the carrier plate, and an accommodation groove is formed between the side plates close to the flexible circuit board and the carrier plate, and the flexible circuit board is arranged in the accommodation groove; one end of the baffle is electrically connected to one end of the carrier plate close to the flexible circuit board, and the other end extends towards the side plates.

10. The foldable display module according to claim 9, characterized in that, The first sub-frame further includes an insulating member, the insulating member is located in the accommodation groove, the side plates and / or the carrier plate are connected to the insulating member, and the baffle and the antenna are respectively located on opposite sides of the insulating member.

11. The foldable display module according to any one of claims 1-10, characterized in that, The baffle is connected to the surface of the first sub-frame facing the flexible circuit board.

12. A foldable display module, characterized in that, The foldable display module includes: A display panel, which can be S-shaped folded; A flexible circuit board, connected to one side of the display panel; the display panel and the flexible circuit board are arranged along a preset direction; A middle frame, connected to the display panel; the middle frame includes at least three sub-frames arranged along the preset direction and sequentially rotationally connected, and the sub-frame closest to the flexible circuit board among the at least three sub-frames is the first sub-frame; An antenna, connected to one end of the first sub-frame close to the flexible circuit board; and A shielding layer, 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; Wherein, the outer contour of the projection of the shielding layer in the antenna area at least partially covers the projection of the flexible circuit board in the antenna area.

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

14. The foldable display module according to claim 13, wherein The shielding layer is electrically connected to one end of the first sub-frame close to the flexible circuit board through a conductive adhesive.

15. A middle frame component, characterized in that, The middle frame assembly is used to connect the antenna, the flexible circuit board and the display panel, and the middle frame assembly includes: At least three sub-frames for connecting to the display panel so that the display panel can be folded in an S shape; the at least three sub-frames are arranged in a preset direction and are sequentially rotatably connected, and the preset direction is the direction in which the display panel and the flexible circuit board are arranged; the outermost one of the at least three sub-frames is the first sub-frame; A baffle plate electrically connected to one end of the first sub-frame away from other sub-frames; Wherein, when 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 plate, and at least a part of the outer contour of the projection of the baffle plate in the antenna area covers the projection of the flexible circuit board in the antenna area.

16. The middle frame component according to claim 15, characterized in that, The baffle plate is a mesh structure, or the surface of the baffle plate is closed.

17. The middle frame assembly according to claim 15 or 16, characterized in that, Along the rotation axis direction of the first sub-frame, the baffle plate extends from one end of the first sub-frame to the other end.

18. The middle frame component according to any one of claims 15-17, characterized in that, The baffle plate includes a bent portion and a connecting portion that are electrically connected to each other, and the connecting portion is electrically connected to one end of the first sub-frame away from other sub-frames; when the antenna and the display panel are both connected to the middle frame, the bent portion bends towards the flexible circuit board to surround the surface of the flexible circuit board facing the antenna.

19. The middle frame assembly according to any one of claims 15-18, characterized in that, The material of the baffle plate includes metal.

20. The middle frame assembly according to any one of claims 15-19, characterized in that, The baffle plate is electrically connected and welded to one end of the first sub-frame away from other sub-frames; or The baffle plate is integrally formed with one end of the first sub-frame away from other sub-frames.

21. A foldable display device, characterized in that, The foldable display device includes a rear case and the foldable display module according to any one of claims 1-14, and the rear case is connected to the side of the middle frame away from the display panel.

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