NFC antenna structure, display screen module and electronic equipment

Abstract

The utility model discloses an NFC antenna structure, a display screen module and an electronic device. The NFC antenna structure is suitable for a display screen module and comprises a metal light shielding plate and an NFC antenna, a hollow area is arranged on a vertex angle close to the metal light shielding plate, and a frame area is formed between the hollow area and the edge of the vertex angle; and the NFC antenna covers the frame area and a part of the hollow area. According to the utility model, the NFC antenna performance and the screen display effect can be effectively balanced.

Description

Technical Field

[0001] This utility model relates to the field of electronic equipment technology, and in particular to an NFC antenna structure, a display module, and an electronic device. Background Technology

[0002] Contactless payment methods have become an important part of mainstream payment methods due to their significant convenience and efficiency. Currently, contactless payment structures are usually located on the back of electronic devices, which presents a problem of inconvenience in use.

[0003] In related technologies, to simplify the structure of payment devices and improve ease of use, contactless payment mechanisms are often placed under the screen of electronic devices. For example, an NFC (Near Field Communication) antenna can be integrated under the screen of an electronic device to achieve under-display NFC functionality. However, the current arrangement of under-display NFC antennas often negatively impacts the overall design layout and display performance of the device's screen. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an NFC antenna structure, a display module, and an electronic device that can effectively balance NFC antenna performance and screen display effect.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] An NFC antenna structure suitable for display modules includes a metal light shield and an NFC antenna;

[0007] A cutout area is provided at one of the top corners near the metal light shield, and a border area is formed between the cutout area and the edge of the top corner.

[0008] The NFC antenna covers the frame area and part of the cutout area.

[0009] Furthermore, the area of ​​the hollowed-out region is larger than the area of ​​the NFC antenna.

[0010] Furthermore, both the metal light-shielding plate and the hollowed-out area are rectangular, and the border area is L-shaped.

[0011] Furthermore, a border area is formed between the hollowed-out area and the edge of the top corner, and the border area is L-shaped.

[0012] Furthermore, the NFC antenna is rectangular, and the border area is offset from the NFC antenna.

[0013] Furthermore, it also includes a protective frame disposed around the edge of the metal light shield;

[0014] There is a gap area between the edge of the metal light shield and the protective frame;

[0015] The NFC antenna also covers the gap area.

[0016] Furthermore, the distance between the hollowed-out area and the edge of the top corner is greater than or equal to 5mm and less than or equal to 12mm.

[0017] Furthermore, the NFC antenna includes a multi-layer FPC coil surrounding a single plane;

[0018] The multi-layer FPC coil covers the corner of the L-shaped frame area.

[0019] Furthermore, a ferrite layer is provided on the side of the NFC antenna away from the metal light shield;

[0020] A metal cover plate is provided on the side of the ferrite layer away from the NFC antenna.

[0021] To solve the above-mentioned technical problems, another technical solution adopted by this utility model is as follows:

[0022] A display module includes a liquid crystal display layer, a glass cover, and the aforementioned NFC antenna structure;

[0023] The liquid crystal display layer is disposed on the side of the metal light shield away from the NFC antenna;

[0024] The glass cover is disposed on the side of the liquid crystal display layer away from the metal light shield.

[0025] To solve the above-mentioned technical problems, another technical solution adopted by this utility model is as follows:

[0026] An electronic device comprising the aforementioned NFC antenna structure.

[0027] The beneficial effects of this invention are as follows: Using a metal light-shielding plate as the basic component of the screen, and creating a localized non-metallic area by setting a hollowed-out region at one of the top corners of the metal light-shielding plate, the non-core area of ​​the light-shielding plate's edge can be fully utilized for hollowing out. This maintains the overall structural strength of the light-shielding plate while providing an electromagnetic wave penetration window for antenna placement. The border area formed by the hollowed-out region and the edge of the light-shielding plate limits the antenna installation position and coverage area, reducing the direct contact area between the NFC antenna and the metal light-shielding plate. By covering part of the hollowed-out region, the shielding effect of the metal material on electromagnetic signals is overcome, thereby reducing eddy current losses. This structural design overcomes the limitation of traditional metal light-shielding plates being incompatible with NFC communication performance, while avoiding the increased thickness problem caused by using plastic light-shielding plates, achieving a balance between efficient use of under-screen space and wireless communication performance. Attached Figure Description

[0028] Figure 1 A schematic diagram of an NFC antenna structure provided in an embodiment of this utility model;

[0029] Figure 2 A schematic diagram of the structure of a metal light-shielding plate provided in an embodiment of this utility model;

[0030] Figure 3 A schematic diagram of the structure of a protective frame provided in an embodiment of this utility model;

[0031] Figure 4 A schematic diagram illustrating the arrangement of a liquid crystal display layer according to an embodiment of this utility model;

[0032] Figure 5 A schematic diagram of an NFC antenna coverage gap area provided in an embodiment of this utility model;

[0033] Figure 6 A schematic diagram of an NFC antenna gap area not covered by an embodiment of this utility model;

[0034] Figure 7 A schematic diagram of the structure of an NFC antenna provided in an embodiment of this utility model;

[0035] Figure 8 A schematic diagram of the structure of a ferrite layer provided in an embodiment of this utility model;

[0036] Figure 9 A schematic diagram of another ferrite layer structure provided in this embodiment of the present invention;

[0037] Figure 10 A schematic diagram of the structure of a display module provided in an embodiment of this utility model;

[0038] Figure 11A schematic diagram of the structure of an electronic device provided in an embodiment of this utility model;

[0039] Label Explanation:

[0040] 1. NFC antenna structure; 11. Metal light shield; 111. Hollowed-out area; 112. Frame area; 12. NFC antenna; 121. Extension area; 1201. Multilayer FPC coil; 13. Protective frame; 14. Gap area; 15. Ferrite layer; 16. Metal cover plate;

[0041] 2. Display module; 21. Liquid crystal display layer; 22. Glass cover;

[0042] 3. Electronic devices; 31. Tablet devices; 32. Payment terminal base. Detailed Implementation

[0043] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0044] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0045] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0046] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0047] In related technologies, to simplify the structure of payment devices and improve ease of use, contactless payment mechanisms are often placed under the screen of electronic devices. For example, an NFC (Near Field Communication) antenna can be integrated under the screen of an electronic device to achieve under-display NFC functionality. However, the current arrangement of under-display NFC antennas often negatively impacts the overall design layout and display performance of the device's screen.

[0048] The back of a screen module typically features a light-shielding structure to prevent light leakage from non-display areas or edges, thereby improving display quality and contrast. The under-display NFC antenna is usually housed within this light-shielding structure. If a metal light-shielding is used, the eddy current effect between metal and the NFC antenna can severely interfere with its performance. If a non-metallic material (such as plastic) is used, the lower structural strength of non-metallic materials results in a thicker light-shielding, increasing the overall size of the screen module and hindering its installation and layout.

[0049] To address the aforementioned issues, this application provides an NFC antenna structure suitable for display modules, comprising a metal light shield and an NFC antenna;

[0050] A cutout area is provided at one of the top corners near the metal light shield, and a border area is formed between the cutout area and the edge of the top corner.

[0051] The NFC antenna covers the border area and some of the hollowed-out areas.

[0052] As described above, using a metal light-shielding plate as the basic component of the screen, and creating a localized non-metallic area by setting a hollowed-out area at one of the top corners of the metal light-shielding plate, fully utilizes the non-core area of ​​the plate's edge for hollowing out. This maintains the overall structural strength of the light-shielding plate while providing an electromagnetic wave penetration window for antenna placement. The border area formed by the hollowed-out area and the edge of the light-shielding plate limits the antenna installation position and coverage, reducing the direct contact area between the NFC antenna and the metal light-shielding plate. By covering part of the hollowed-out area, the shielding effect of the metal material on electromagnetic signals is overcome, thereby reducing eddy current losses. This structural design overcomes the limitation of traditional metal light-shielding plates being incompatible with NFC communication performance, while avoiding the increased thickness caused by using plastic light-shielding plates, achieving a balance between efficient use of under-screen space and wireless communication performance.

[0053] In one embodiment of this application, the area of ​​the hollowed-out region is larger than the area of ​​the NFC antenna.

[0054] As described above, by increasing the physical size of the perforated area, a sufficient non-metallic area is created for the NFC antenna, thereby reducing the shielding effect of the metal material on electromagnetic signals. Specifically, the area difference between the perforated area and the NFC antenna forms an extended window for the antenna signal to radiate outwards. This allows the antenna to transmit signals through the uncovered remaining perforated area even when it covers part of the perforated area, effectively resolving the spatial conflict between the metal light shield and the antenna signal transmission.

[0055] In one embodiment of this application, both the metal light-shielding plate and the hollowed-out area are rectangular, and the border area is L-shaped.

[0056] As described above, the L-shaped frame area retains the mechanical support strength of the metal light-shielding plate at the corner, while its specific geometric arrangement provides the NFC antenna with installation space that maintains a specific distance from the edge of the metal light-shielding plate. This L-shaped layout effectively avoids direct obstruction of the antenna signal by the metal material, and at the same time utilizes the corner space to form an asymmetric electromagnetic field distribution, reducing electromagnetic interference from the metal light-shielding plate to the antenna's near-field communication.

[0057] In one embodiment of this application, the NFC antenna is rectangular, and the border area is offset from the NFC antenna.

[0058] As can be seen from the above description, the frame area and the NFC antenna are set in a staggered manner, so that the frame area of ​​the metal light shield does not completely cover the projection area of ​​the NFC antenna. This avoids the direct shielding effect of the metal material on the antenna's electromagnetic field, and reduces the attenuation effect of the metal frame on the antenna's transmitting and receiving signals through the spatial staggered relationship.

[0059] In one embodiment of this application, a protective frame is also provided around the edge of the metal light shield;

[0060] There is a gap between the edge of the metal light shield and the protective frame;

[0061] The NFC antenna also covers the gap area.

[0062] As described above, the coverage area of ​​the NFC antenna also includes the gap between the metal light-shielding plate and the protective frame. This allows the antenna to extend its effective signal radiation area while avoiding the coverage area of ​​the metal light-shielding plate. This ensures the antenna's signal transmission efficiency while avoiding the limitations of relying entirely on the internal space layout of the metal light-shielding plate. This design achieves a balance between antenna performance and spatial constraints by using edge extension through spatial misalignment, while maintaining the original light-shielding function of the metal light-shielding plate.

[0063] In one embodiment of this application, the distance between the hollowed-out area and the edge of the top corner is greater than or equal to 5 mm and less than or equal to 12 mm.

[0064] As described above, when the distance between the hollowed-out area and the top corner edge is controlled between 5mm and 12mm, this distance can effectively reduce the eddy current effect between the metal frame and the NFC antenna, while ensuring that the edge of the metal light shield has sufficient mechanical support strength to prevent light leakage caused by deformation of the metal light shield. This spacing setting allows the NFC antenna to achieve optimal electromagnetic coupling at the L-shaped corner, while preventing the risk of metal edge deformation due to excessively small spacing and the reduction in antenna performance due to excessively large spacing.

[0065] In one embodiment of this application, the NFC antenna includes a multilayer FPC coil surrounding a single plane;

[0066] The corner of the L-shaped frame area is covered by a multi-layer FPC coil.

[0067] As described above, multilayer FPC (flexible printed circuit board) coils form coil loops within a limited planar space, effectively increasing the antenna sensing area without increasing vertical thickness. Placing the multilayer FPC coils at the corners of the L-shaped frame utilizes the structural characteristics of the corner area to avoid optical path interference from the core display area while enhancing magnetic field coupling efficiency through the geometric features of the corner. The special positioning at the corner leverages the mechanical support structure of the light-shielding plate edge, creating an optimal balance between electromagnetic shielding and signal radiation.

[0068] In one embodiment of this application, a ferrite layer is provided on the side of the NFC antenna away from the metal light shield;

[0069] A metal cover is provided on the side of the ferrite layer away from the NFC antenna.

[0070] As can be seen from the above description, the metal cover provides electromagnetic shielding for the NFC antenna, avoiding interference from external signals or magnetic fields on the antenna transmission, and the ferrite layer reduces the eddy current effect between the metal cover and the NFC antenna.

[0071] To address the aforementioned issues, this application provides a display module, including a liquid crystal display layer, a glass cover, and the aforementioned NFC antenna structure.

[0072] The liquid crystal display layer is located on the side of the metal light shield away from the NFC antenna;

[0073] The glass cover is located on the side of the liquid crystal display layer away from the metal light shield.

[0074] As described above, the liquid crystal display layer is used to realize the display function of the screen. The glass cover is used to protect the liquid crystal display layer, preventing external dust, stains, and moisture from entering the interior of the display screen, and can effectively block external physical impacts.

[0075] To address the aforementioned issues, this application provides an electronic device including the aforementioned NFC antenna structure.

[0076] In one embodiment of this application, the electronic device may be a POS machine, a self-service terminal, or a payment device, etc.

[0077] The NFC antenna structure provided by this utility model can be applied to electronic devices that require contactless payment functions. The following is a detailed description of its implementation:

[0078] Example 1

[0079] like Figures 1 to 2 As shown, an NFC antenna structure 1 includes a metal light-shielding plate 11 and an NFC antenna 12. A cutout area 111 is provided at one of the top corners near the metal light-shielding plate 11, forming a border area 112 between the cutout area 111 and the edge of the top corner. The NFC antenna 12 covers the border area 112 and part of the cutout area 111. The area of ​​the cutout area 111 is larger than the area of ​​the NFC antenna 12. In this embodiment, both the metal light-shielding plate 11 and the cutout area 111 are rectangular, and the border area 112 is L-shaped.

[0080] Specifically, the cutout area 111 needs to be set in the area near the upper left or upper right corner of the metal light shield 11. Since the area near the upper left or upper right corner of the display module is usually a non-core display area, the wiring grid of the liquid crystal display layer in the display module will not be so dense in this area, thereby further reducing the impact of the liquid crystal display layer in the display module on the performance of the NFC antenna 12.

[0081] Specifically, after setting the hollow area 111 on the metal light-shielding plate 11, a large frame area in the shape of a square formed by two L-shaped frame areas will be formed between the hollow area 111 and the edge of the metal light-shielding plate 11. However, since the hollow area 111 is close to one of the top corners of the metal light-shielding plate 11, the areas of the two L-shaped frame areas 112 formed on both sides of the hollow area 111 are somewhat different. The frame area 112 described in this utility model is the smaller part of the area.

[0082] like Figure 3 As shown, the NFC antenna 12 is rectangular, and the border area 112 is offset from the NFC antenna 12. Specifically, as... Figure 4 As shown, a liquid crystal display layer 21 is disposed on the side of the metal light-shielding plate 11 away from the NFC antenna 12. In this embodiment, as... Figure 5 As shown, the NFC antenna structure 1 also includes a protective frame 13 disposed around the edge of the metal light shield 11. There is a gap region 14 between the edge of the metal light shield 11 and the protective frame 13, and the NFC antenna 12 also covers the gap region 14. Figure 5 The gray area represents the portion of the NFC antenna that covers the gap area 14.

[0083] In this embodiment, such as Figure 6 As shown, the border area 112 can also be aligned with the NFC antenna 12. In this case, the NFC antenna 12 does not extend beyond the edge of the metal light shield 11, meaning the NFC antenna 12 does not cover the gap area 14. Furthermore, the coverage area of ​​the NFC antenna 12 in the hollow area 111 is greater than the coverage area of ​​the NFC antenna 12 when it is misaligned. Therefore, although setting the hollow area 111 on the metal light shield 11 can reduce the eddy current effect between the NFC antenna 12 and the metal light shield 11, a liquid crystal display layer 21 is also provided on the other side of the metal light shield 11. The wiring of the liquid crystal display layer 21 will also affect the performance of the NFC antenna 12. Therefore, misaligning the NFC antenna 12 with the border area 112 allows part of the NFC antenna 12 to be misaligned with the liquid crystal display layer 21, preventing the liquid crystal display layer 21 from affecting the NFC antenna 12.

[0084] In one optional embodiment, the distance between the cutout area 111 and the edge of the top corner is greater than or equal to 5 mm and less than or equal to 12 mm. In this embodiment, it is preferably 3 mm.

[0085] like Figure 7 As shown, the NFC antenna 12 includes a multi-layer FPC coil 1201 surrounding a multi-layer FPC coil disposed on the same plane, the multi-layer FPC coil 1201 covering the corner of the L-shaped frame area 112.

[0086] like Figure 8 As shown, a ferrite layer 15 is provided on the side of the NFC antenna 12 away from the metal light shield 11, and a metal cover plate 16 is provided on the side of the ferrite layer 15 away from the NFC antenna 12.

[0087] In one alternative implementation, such as Figure 9 As shown, a ferrite layer 15 is provided on the projection area of ​​the NFC antenna 12 on the frame area 112 to suppress the eddy current effect between the metal light shield 11 and the NFC antenna 12.

[0088] Example 2

[0089] like Figure 10 As shown, a display module 2 includes a liquid crystal display layer 21, a glass cover plate 22, and an NFC antenna structure 1 of the above embodiment 1. The liquid crystal display layer 21 is disposed on the side of the metal light shield 11 away from the NFC antenna 12; the glass cover plate 22 is disposed on the side of the liquid crystal display layer 21 away from the metal light shield 11.

[0090] Example 3

[0091] like Figure 11 As shown, an electronic device 3 includes an NFC antenna structure 1 as described in Embodiment 1 above.

[0092] In this embodiment, the electronic device 3 is a tablet-type payment terminal, which includes a tablet device 31 and a payment terminal base 32. The tablet device 31 is mounted on the payment terminal base 32 and has an NFC antenna structure 1. The tablet device 31 also contains a main circuit board and a power supply module, which are electrically coupled. The payment terminal base 32 has corresponding charging and transmission interfaces. The power supply module is electrically coupled to the charging interface.

[0093] The corresponding details of one type of NFC antenna structure 1 have already been disclosed in the above sections and will not be repeated here.

[0094] In summary, this invention provides an NFC antenna structure, a display module, and an electronic device. The partially hollowed-out design of the metal light-shielding plate maintains its structural strength while providing an electromagnetic wave penetration window for the NFC antenna. The area difference between the hollowed-out area and the antenna forms an extended window, enhancing signal radiation capability and resolving the spatial conflict between metal and signal transmission. The staggered arrangement of the L-shaped frame area and the antenna effectively avoids direct metal blockage of the antenna signal, reducing electromagnetic interference. Part of the antenna extends beyond the edge of the metal light-shielding plate, further expanding the signal radiation area and improving transmission efficiency. Furthermore, the multi-layer FPC coil surround design increases the sensing area and magnetic field coupling efficiency without increasing thickness. This design not only optimizes the under-screen space layout but also ensures the integrity of the display function while providing reliable protection for the device. Overall, this solution significantly improves the compatibility and reliability of NFC communication while maintaining display performance, providing a new solution for the integration and functionalization of electronic devices.

[0095] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An NFC antenna structure, characterized in that, Suitable for display modules, including metal light shields and NFC antennas; A cutout area is provided at one of the top corners near the metal light shield, and a border area is formed between the cutout area and the edge of the top corner. The NFC antenna covers the frame area and part of the cutout area.

2. The NFC antenna structure according to claim 1, characterized in that, The area of ​​the hollowed-out region is larger than the area of ​​the NFC antenna.

3. An NFC antenna structure according to claim 1, characterized in that, Both the metal light-shielding plate and the hollowed-out area are rectangular, and the border area is L-shaped.

4. An NFC antenna structure according to claim 3, characterized in that, The NFC antenna is rectangular, and the border area is offset from the NFC antenna.

5. An NFC antenna structure according to claim 4, characterized in that, It also includes a protective frame surrounding the edge of the metal light shield; There is a gap area between the edge of the metal light shield and the protective frame; The NFC antenna also covers the gap area.

6. An NFC antenna structure according to claim 1, characterized in that, The distance between the hollowed-out area and the edge of the top corner is greater than or equal to 5mm and less than or equal to 12mm.

7. An NFC antenna structure according to claim 3, characterized in that, The NFC antenna includes a multi-layer FPC coil surrounding a single plane; The multi-layer FPC coil covers the corner of the L-shaped frame area.

8. An NFC antenna structure according to claim 1, characterized in that, A ferrite layer is provided on the side of the NFC antenna away from the metal light shield. A metal cover plate is provided on the side of the ferrite layer away from the NFC antenna.

9. A display module, characterized in that, Includes a liquid crystal display layer, a glass cover, and an NFC antenna structure according to any one of claims 1 to 8; The liquid crystal display layer is disposed on the side of the metal light shield away from the NFC antenna; The glass cover is disposed on the side of the liquid crystal display layer away from the metal light shield.

10. An electronic device, characterized in that, Including an NFC antenna structure according to any one of claims 1 to 8.

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