Electronic devices

Abstract

The embodiment of the present application provides an electronic device, including: a metal back shell, a camera hole is provided on the metal back shell, and the camera hole is used to install a camera module; a near field communication chip, which is used to provide a differential excitation current; a first conductor structure; a first metal coil, which at least partially covers a part of the camera hole; the first conductor structure and the first metal coil are used to jointly transmit the differential excitation current. In the electronic device, the NFC signal can be radiated outward through the part where the first conductor structure is located, and the signal can be radiated outward through the part where the camera hole is located. Therefore, the NFC signal can be radiated outward through different parts of the electronic device, thereby increasing the NFC signal radiation area of ​​the electronic device, and there is no need to set additional openings on the metal back shell, thereby ensuring the integrity of the metal back shell.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to an electronic device. Background Art

[0002] With the development of communication technology, electronic devices such as smart phones can realize more and more functions, and the communication modes of electronic devices are also more diversified. For example, recently electronic devices can gradually realize the Near Field Communication (NFC) function. Therefore, how to reasonably design the NFC antenna of electronic devices has become a difficult problem. Summary of the invention

[0003] An embodiment of the present application provides an electronic device, which can increase the NFC signal radiation area of ​​the electronic device while ensuring the integrity of the metal back shell.

[0004] An embodiment of the present application provides an electronic device, including:

[0005] A metal back shell, wherein a camera hole is provided on the metal back shell, and the camera hole is used to install a camera module;

[0006] A near field communication chip, comprising a first differential signal terminal and a second differential signal terminal, wherein the first differential signal terminal and the second differential signal terminal are used to provide a differential excitation current;

[0007] a first conductor structure, the first conductor structure comprising a first electrical connection point and a second electrical connection point, the first electrical connection point being electrically connected to the first differential signal end;

[0008] a first metal coil, wherein the first metal coil at least partially covers a portion of the camera hole, a first end of the first metal coil is electrically connected to the second electrical connection point, and a second end of the first metal coil is electrically connected to the second differential signal end;

[0009] The first conductor structure and the first metal coil are used to jointly transmit the differential excitation current.

[0010] The electronic device provided in the embodiment of the present application can radiate NFC signals outwardly through the part where the first conductor structure is located, and can also radiate signals outwardly through the part where the camera hole is located. Therefore, NFC signals can be radiated outwardly through different parts of the electronic device, thereby increasing the NFC signal radiation area of ​​the electronic device, and there is no need to set additional openings on the metal back shell, thereby ensuring the integrity of the metal back shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0012] Figure 1 A first structural schematic diagram of an electronic device provided in an embodiment of the present application.

[0013] Figure 2 This is a rear view of the electronic device provided in an embodiment of the present application.

[0014] Figure 3 A schematic diagram of the first structure of the housing of an electronic device provided in an embodiment of the present application.

[0015] Figure 4 A second structural schematic diagram of an electronic device provided in an embodiment of the present application.

[0016] Figure 5 A third structural schematic diagram of the electronic device provided in an embodiment of the present application.

[0017] Figure 6 A fourth structural schematic diagram of an electronic device provided in an embodiment of the present application.

[0018] Figure 7 A schematic diagram of the structure of a camera module of an electronic device provided in an embodiment of the present application.

[0019] Figure 8 A second structural schematic diagram of a housing of an electronic device provided in an embodiment of the present application.

[0020] Fig. 9 A fifth structural schematic diagram of an electronic device provided in an embodiment of the present application.

[0021] Fig.10 A sixth structural schematic diagram of an electronic device provided in an embodiment of the present application.

[0022] Fig.11 A schematic structural diagram of a first metal coil of an electronic device provided in an embodiment of the present application.

[0023] Fig.12 A seventh structural schematic diagram of an electronic device provided in an embodiment of the present application.

[0024] Fig.13 A schematic structural diagram of a first metal coil, a flexible circuit board, and a radiation field enhancer of an electronic device provided in an embodiment of the present application.

[0025] Fig.14This is a schematic diagram of the eighth structure of the electronic device provided in the embodiment of the present application.

[0026] Fig.15 A ninth structural schematic diagram of an electronic device provided in an embodiment of the present application.

[0027] Fig.16 This is a tenth structural schematic diagram of an electronic device provided in an embodiment of the present application.

[0028] Fig.17 This is a schematic diagram of the eleventh structure of an electronic device provided in an embodiment of the present application.

[0029] Fig.18 This is a twelfth structural schematic diagram of the electronic device provided in an embodiment of the present application.

[0030] Fig.19 A first principle schematic diagram of an antenna device for an electronic device provided in an embodiment of the present application.

[0031] Fig. 20 A second principle schematic diagram of the antenna device of the electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0033] The present application provides an electronic device, which may be a smart phone, a tablet computer, or a gaming device, an AR (Augmented Reality) device, an automotive device, a data storage device, an audio player, a video player, a laptop, a desktop computing device, or the like.

[0034] refer to Figure 1 , Figure 1 A first structural diagram of an electronic device 100 provided in an embodiment of the present application.

[0035] The electronic device 100 includes a display screen 11 , a housing 12 , a circuit board 13 and a battery 14 .

[0036] The display screen 11 is disposed on the housing 12 to form a display surface of the electronic device 100 for displaying images, texts, and other information. The display screen 11 may include a liquid crystal display (LCD) or an organic light-emitting diode display (OLED).

[0037] It is understandable that a cover plate may be provided on the display screen 11 to protect the display screen 11 from being scratched or damaged by water. The cover plate may be a transparent glass cover plate, so that the user can observe the content displayed on the display screen 11 through the cover plate. For example, the cover plate may be a sapphire glass cover plate.

[0038] The housing 12 is used to form the outer contour of the electronic device 100, so as to accommodate the electronic devices and functional components of the electronic device 100, and to seal and protect the electronic devices and functional components inside the electronic device. For example, the functional components of the electronic device 100, such as the circuit board, battery, motor, acceleration sensor, etc., can be arranged inside the housing 12.

[0039] The circuit board 13 is disposed inside the housing 12. The circuit board 13 may be a mainboard of the electronic device 100. One or more functional components such as a processor, an earphone jack, an acceleration sensor, a gyroscope, and a motor may be integrated on the circuit board 13. At the same time, the display screen 11 may be electrically connected to the circuit board 13 so that the display of the display screen 11 is controlled by the processor on the circuit board 13.

[0040] The battery 14 is disposed inside the housing 12. At the same time, the battery 14 is electrically connected to the circuit board 13 so that the battery 14 can power the electronic device 100. A power management circuit may be disposed on the circuit board 13. The power management circuit is used to distribute the voltage provided by the battery 14 to various electronic devices in the electronic device 100.

[0041] In some embodiments, reference Figure 2 , Figure 2 This is a rear view of the electronic device 100 provided in the embodiment of the present application.

[0042] The electronic device 100 further includes a camera module 15. The camera module 15 can be used to implement the camera function of the electronic device 100. The camera module 15 can be, for example, a rear camera module to implement the rear camera function of the electronic device 100.

[0043] In some embodiments, while referring to Figure 3 , Figure 3The first structural schematic diagram of the housing 12 of the electronic device provided in the embodiment of the present application is shown in FIG.

[0044] The metal back cover 121 can be used as a back cover of the electronic device 100, and is used to seal electronic devices or functional components such as the circuit board 13 and the battery 14 inside the electronic device 100. The material of the metal back cover 121 can include magnesium alloy, aluminum alloy and the like.

[0045] The metal frame 122 is disposed around the outer periphery of the electronic device 100, thereby forming a side frame of the electronic device 100. The material of the metal frame 122 may also include materials such as magnesium alloy, aluminum alloy, etc.

[0046] It is understandable that the shell 12 may also include a middle frame. The middle frame may be a thin plate or sheet-like structure, or it may be a hollow frame structure. The middle frame is used to provide support for the electronic devices or functional components of the electronic device 100, so as to install the electronic devices and functional components of the electronic device 100 together. Among them, the material of the middle frame may include metal or plastic, etc. It is understandable that in order to enhance the structural strength of the middle frame, metal materials such as magnesium alloy and aluminum alloy may be selected to form the middle frame. The metal back shell 121 may be connected to the middle frame, for example, by bonding, snapping, etc. The metal frame 122 may be arranged around the periphery of the middle frame to form a side frame of the electronic device 100.

[0047] In some embodiments, a camera hole 1211 is provided on the metal back shell 121. The camera hole 1211 can be used to install the camera module 15, so that the camera module 15 can collect external light through the camera hole 1211, thereby realizing the photo taking function. It can be understood that the size and shape of the camera hole 1211 can be adapted to the camera module 15.

[0048] In some embodiments, an antenna device is further provided in the electronic device 100. The antenna device is used to implement the wireless communication function of the electronic device 100, for example, it can be used to implement the Near Field Communication (NFC) function. The following describes various implementations of the antenna device integrated in the electronic device 100.

[0049] refer to Figure 4 , Figure 4 A second structural diagram of the electronic device 100 provided in an embodiment of the present application.

[0050] The electronic device 100 further includes a near field communication chip (Near Field Communication Integrated circuit, NFC IC) 21 , a first conductor structure 22 and a first metal coil 23 .

[0051] Among them, NFC IC 21 can be used to provide a differential excitation current. The differential excitation current includes two current signals. The two current signals have the same amplitude and opposite phases, or it can be understood that the two current signals differ in phase by 180 degrees. In addition, the differential excitation current is a balanced signal. It can be understood that during the transmission process, if an analog signal is directly transmitted, it is an unbalanced signal; if the original analog signal is inverted, and then the inverted analog signal and the original analog signal are transmitted at the same time, the inverted analog signal and the original analog signal are called balanced signals. Compared with unbalanced signals, balanced signals have better anti-interference performance.

[0052] The NFC IC 21 may be disposed on the circuit board 13 of the electronic device 100 , or a smaller independent circuit board may be disposed in the electronic device 100 and the NFC IC 21 may be integrated into the independent circuit board. The independent circuit board may be, for example, a flexible circuit board in the electronic device 100 .

[0053] The NFC IC 21 includes a first differential signal terminal 211 and a second differential signal terminal 212. For example, the first differential signal terminal 211 may be a positive (+) port of the NFC IC 21, and the second differential signal terminal 212 may be a negative (-) port of the NFC IC 21. The first differential signal terminal 211 and the second differential signal terminal 212 are used to provide the differential excitation current. For example, the differential excitation current provided by the NFC IC 21 may be output via the first differential signal terminal 211, and flow back to the NFC IC 21 via the second differential signal terminal 212, thereby forming a current loop.

[0054] In the description of the embodiments of the present application, it should be understood that terms such as "first" and "second" are only used to distinguish similar objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0055] The first conductor structure 22 may be a metal structure in the electronic device 100 or a metal trace on the circuit board 13. The first conductor structure 22 includes a first electrical connection point 221 and a second electrical connection point 222. The first electrical connection point 221 and the second electrical connection point 222 are arranged at intervals. The first electrical connection point 221 and the second electrical connection point 222 may be used to feed an excitation current to the first conductor structure 22. The first electrical connection point 221 is electrically connected to the first differential signal terminal 211 of the NFC IC 21. Thus, the first differential signal terminal 211 may feed a differential excitation current to the first conductor structure 22 through the first electrical connection point 221.

[0056] The first metal coil 23 may be a coil formed of a metal material such as a wire. The number of turns of the first metal coil 23 may be one turn or more turns, for example, 10 turns, 20 turns, etc. The first metal coil 23 includes two free ends, namely a first end 231 and a second end 232. The first end 231 is electrically connected to the second electrical connection point 222 of the first conductor structure 22, and the second end 232 is electrically connected to the second differential signal end 212 of the NFC IC 21.

[0057] Thus, the NFC IC 21, the first conductor structure 22, and the first metal coil 23 can form a current loop, so that the first conductor structure 22 and the first metal coil 23 can be used to jointly transmit the differential excitation current provided by the NFC IC 21 and radiate the NFC signal outward. Therefore, the first conductor structure 22 and the first metal coil 23 can serve as the NFC antenna of the electronic device 100 to realize the NFC function of the electronic device 100.

[0058] Among them, the first metal coil 23 and the first conductor structure 22 are arranged at intervals, that is, the first metal coil 23 and the first conductor structure 22 are arranged at different parts of the electronic device 100. When the first conductor structure 22 transmits the differential excitation current, it can radiate the NFC signal to the outside. The first metal coil 23 at least partially covers a part of the camera hole 1211, for example, the first metal coil 23 can partially or completely cover the area of ​​the camera hole 1211 near the NFC IC 21 side. Therefore, when the first metal coil 23 transmits the differential excitation current, it can radiate the NFC signal to the outside through the camera hole 1211.

[0059] In the embodiment of the present application, the camera hole 1211 can be centered on the metal back shell 121, or can be arranged close to the side of the metal back shell 121, that is, not centered. When the camera hole 1211 is not centered on the metal back shell 121, for example, when it is arranged close to the side of the metal back shell 121, the traditional method of arranging the NFC coil around the camera hole cannot achieve good NFC performance, and cannot provide enough space for the NFC coil to be routed on the structural stack of the electronic device. These problems can be well solved by the solution of the present application. In addition, when the camera hole 1211 is centered on the metal back shell 121, the solution of the present application can also provide good NFC performance.

[0060] In some embodiments, reference Figure 5 , Figure 5 A third structural schematic diagram of the electronic device 100 provided in an embodiment of the present application.

[0061] The electronic device 100 further includes a second conductor structure 26. The second conductor structure 26 may also be a metal structure in the electronic device 100 or a metal trace on the circuit board 13.

[0062] The second conductor structure 26 includes a third electrical connection point 261 and a fourth electrical connection point 262. The third electrical connection point 261 is electrically connected to the second end 232 of the first metal coil 23, and the fourth electrical connection point 262 is electrically connected to the second differential signal end 212 of the NFC IC 21, so that the second end 232 of the first metal coil 23 is electrically connected to the second differential signal end 212.

[0063] Therefore, the differential excitation current provided by the NFC IC 21 can be transmitted together through the first conductor structure 22, the first metal coil 23 and the second conductor structure 26, which can effectively increase the transmission path length of the differential excitation current. In addition, since the first conductor structure 22 and the second conductor structure 26 can be formed at different positions in the electronic device, the coverage range of the NFC signal can also be increased, and the area of ​​the NFC card swiping area can be increased.

[0064] In some embodiments, reference Figure 6 , Figure 6 This is a fourth structural diagram of the electronic device 100 provided in an embodiment of the present application.

[0065] The electronic device 100 further includes a second metal coil 27. The second metal coil 27 may also be a coil formed of a metal material such as a wire, etc. The number of turns of the second metal coil 27 may also be one turn or more turns.

[0066] The second metal coil 27 includes two free ends, namely a third end 271 and a fourth end 272. The third end 271 is electrically connected to the second end 232 of the first metal coil 23, and the fourth end 272 is electrically connected to the third electrical connection point 261, so that the third electrical connection point 261 is electrically connected to the second end 232 of the first metal coil 23.

[0067] Therefore, the differential excitation current provided by the NFC IC 21 can be transmitted together through the first conductor structure 22, the first metal coil 23, the second metal coil 27 and the second conductor structure 26, which can further increase the transmission path length of the differential excitation current.

[0068] The second metal coil 27 at least partially covers a portion of the camera hole 1211. For example, the second metal coil 27 may partially or completely cover an area on one side of the camera hole 1211. Therefore, when the second metal coil 27 transmits the differential excitation current, it may also radiate the NFC signal to the outside through the camera hole 1211.

[0069] In practical applications, the first metal coil 23 and the second metal coil 27 respectively cover different areas of the camera hole 1211. For example, the first metal coil 23 can cover the right area of ​​the camera hole 1211, and the second metal coil 27 can cover the left area of ​​the camera hole 1211.

[0070] It can be understood that when the first conductor structure 22, the first metal coil 23, the second metal coil 27 and the second conductor structure 26 jointly transmit the differential excitation current provided by the NFC IC 21, the current directions in the first metal coil 23 and the second metal coil 27 can be the same, so that the NFC radiation field generated by the first metal coil 23 has the same direction as the NFC radiation field generated by the second metal coil 27. Therefore, the NFC radiation field generated by the first metal coil 23 and the NFC radiation field generated by the second metal coil 27 can be superimposed on each other to enhance the NFC field strength at the camera hole 1211, thereby improving the NFC signal strength.

[0071] It is understandable that, since the metal back shell 121 is made of metal, and metal material can shield wireless signals such as NFC signals, the NFC signal radiated by the first metal coil 23 cannot be transmitted to the outside through the metal back shell 121. At the same time, since a camera hole 1211 is required to be provided on the metal back shell 121 to install the camera module 15, the NFC signal radiated by the first metal coil 23 can be transmitted to the outside through the camera hole 1211, which can prevent the NFC signal from being shielded by the metal back shell 121, and can also prevent the additional openings on the metal back shell 121 from affecting the structural strength and aesthetics of the metal back shell 121, and can realize the NFC function through the location of the camera hole 1211.

[0072] Therefore, the electronic device 100 provided in the embodiment of the present application can radiate NFC signals outwardly through the part where the first conductor structure 22 is located, and can also radiate NFC signals outwardly through the part where the camera hole 1211 is located. Therefore, NFC signals can be radiated outwardly through different parts of the electronic device 100, thereby increasing the NFC signal radiation area of ​​the electronic device 100, and there is no need to set additional openings on the metal back shell 121, thereby ensuring the integrity of the metal back shell 121.

[0073] It can be understood that the first conductor structure 22 forms a first near field communication radiation field (first NFC radiation field) when transmitting a differential excitation current, and the first NFC radiation field can cover a certain space area around the electronic device 100. The first metal coil 23 forms a second near field communication radiation field (second NFC radiation field) when transmitting a differential excitation current, and the second NFC radiation field can also cover a certain space area around the electronic device 100. Among them, the second NFC radiation field overlaps at least partially with the first NFC radiation field. It can be understood that according to the current direction in the first conductor structure 22 and the current direction in the first metal coil 23, the second NFC radiation field and the first NFC radiation field have components in the same direction. Therefore, the range of the NFC radiation field around the electronic device 100 can be enhanced, and the NFC field strength in the overlapping area can be enhanced. Thereby, the effective reading and writing (card swiping) area of ​​the NFC antenna of the electronic device 100 can be increased, and the stability of the NFC antenna of the electronic device 100 during reading and writing (card swiping) can be improved.

[0074] For example, in actual applications, when an NFC receiver (such as a subway card reader) reads an NFC signal near the position of the first conductor structure 22, the first NFC radiation field formed by the first conductor structure 22 serves as the main radiation field, and the second NFC radiation field formed by the first metal coil 23 can compensate for the main radiation field, thereby compensating for the position where the field strength in the main radiation field is weak, so as to enhance the field strength of the entire area of ​​the main radiation field. Similarly, when the NFC receiver reads the NFC signal near the position of the first metal coil 23, that is, when the NFC signal is read near the position of the camera hole 1211, the second NFC radiation field formed by the first metal coil 23 serves as the main radiation field, and the first NFC radiation field formed by the first conductor structure 22 can compensate for the main radiation field. Therefore, any position of the NFC radiation field formed by the first conductor structure 22 and the first metal coil 23 can realize the transmission and reception of NFC signals, thereby realizing NFC communication between the electronic device 100 and other electronic devices.

[0075] In some embodiments, reference Figure 7 , Figure 7A schematic structural diagram of a camera module 15 of an electronic device provided in an embodiment of the present application.

[0076] The camera module 15 includes one or more cameras 151 and a non-metallic element 152. The number of cameras 151 may be, for example, 1, 2, 3, or 4, etc. The non-metallic element 152 may be, for example, a non-metallic decorative ring, such as a plastic decorative ring, and the non-metallic decorative ring 152 may be disposed on the periphery of one or more cameras 151.

[0077] The first metal coil 23 at least partially covers a portion of the non-metallic element 152, for example, the first metal coil 23 at least partially covers a portion of the non-metallic decorative ring. Thus, when the first metal coil 23 transmits the differential excitation current, the radiated NFC signal can be transmitted to the outside through the covered portion of the non-metallic element 152, so as to realize NFC communication between the electronic device 100 and other electronic devices.

[0078] In some embodiments, reference Figure 8 , Figure 8 This is a schematic diagram of a second structure of the housing 12 of the electronic device provided in an embodiment of the present application.

[0079] Among them, a metal branch 1221 is formed on the metal frame 122 of the housing 12, for example, a metal branch 1221 of a magnesium alloy or an aluminum alloy can be formed. The metal branch 1221 can form the first conductor structure 22. Therefore, the first conductor structure 22 can be formed by the metal frame 122 of the electronic device 100, and there is no need to separately set the first conductor structure or the NFC antenna in the electronic device 100, so the reuse of the metal frame 122 can be achieved, simplifying the design of the NFC antenna.

[0080] For example, in some embodiments, a first slit 1222 and a second slit 1223 may be spaced apart on the metal frame 122, and both the first slit 1222 and the second slit 1223 penetrate the metal frame 122. Thus, the metal branch 1221 may be formed between the first slit 1222 and the second slit 1223.

[0081] In some embodiments, reference Fig. 9 , Fig. 9 This is a fifth structural diagram of the electronic device 100 provided in an embodiment of the present application.

[0082] The number of turns of the first metal coil 23 is one turn, and the first metal coil 23 can be understood as an unclosed coil, and there is no overlapping portion between the two ends of the first metal coil 23. The one turn of the first metal coil 23 covers a partial area of ​​the camera hole 1211. For example, in practical applications, the first metal coil 23 can be a straight section of wire or a section of printed circuit.

[0083] When the NFC IC 21, the first conductor structure 22 and the first metal coil 23 form a current loop, the current direction can be as follows: Fig. 9 The current flowing through the first metal coil 23 can be denoted as I1, and the direction of I1 flows from the first conductor structure 22 to the NFC IC 21 via the first metal coil 23.

[0084] It can be understood that in actual applications, when the number of turns of the first metal coil 23 is one turn, the first metal coil 23 can be distributed in the non-metallic area as much as possible, and the wire diameter of the first metal coil 23 or the flexible circuit board carrying the first metal coil 23 can be set as wide as possible to enhance the current intensity, thereby enhancing the field strength of the NFC radiation field generated by the first metal coil 23 to enhance the NFC signal strength.

[0085] In some embodiments, while referring to Fig.10 and Fig.11 , Fig.10 A sixth structural diagram of the electronic device 100 provided in an embodiment of the present application is shown in FIG. Fig.11 A schematic diagram of the structure of a first metal coil 23 of an electronic device provided in an embodiment of the present application.

[0086] The number of turns of the first metal coil 23 is multiple, such as 10 turns, 20 turns, etc. When the number of turns of the first metal coil 23 is multiple, the first metal coil 23 can be understood as a closed coil, and there is an overlapping part between the two ends of the first metal coil 23. The multiple turns of the first metal coil 23 form a first coil portion 233 and a second coil portion 234, and each coil in the first coil portion 233 is connected end to end with each coil in the second coil portion 234. The first coil portion 233 covers a part of the camera hole 1211, and the second coil portion 234 covers a part of the metal back shell 121.

[0087] When the NFC IC 21, the first conductor structure 22, and the first metal coil 23 form a current loop, current flows through both the first coil portion 233 and the second coil portion 234. For example, the current flowing through the first coil portion 233 is recorded as I1, and the current flowing through the second coil portion 234 is recorded as I2. It can be understood that the direction of the current I1 in the first coil portion 233 is opposite to the direction of the current I2 in the second coil portion 234. For example, the direction of the current I1 is from the first conductor structure 22 toward the first metal coil 23, and the direction of the current I2 is from the first metal coil 23 toward the first conductor structure 22. The current directions when the NFC IC 21, the first conductor structure 22, and the first metal coil 23 form a current loop are as follows: Fig.10 In the direction indicated by the arrow.

[0088] It is understandable that, since the second coil portion 234 covers a partial area of ​​the metal back shell 121, that is, the distance between the second coil portion 234 and the partial area of ​​the metal back shell 121 covered is very close, when the current I2 flows through the second coil portion 234, the partial area of ​​the metal back shell 121 covered by the second coil portion 234 will generate an induced current, such as an eddy current, under the action of the current I2, and the induced current can be recorded as I3. It is understandable that the direction of the induced current I3 is opposite to the direction of the current I2 flowing through the second coil portion 234, and therefore the direction of the induced current I3 is the same as the direction of the current I1 flowing through the first coil portion 233.

[0089] When the first coil portion 233 transmits the differential excitation current, it radiates the NFC signal outward, thereby generating an NFC radiation field, such as a third NFC radiation field, which can cover a certain space area around the electronic device 100. When the partial area of ​​the metal back shell 121 covered by the second coil portion 234 transmits the induced current I3, the partial area will also radiate the NFC signal outward, thereby generating an NFC radiation field, such as a fourth NFC radiation field, which can also cover a certain space area around the electronic device 100. Among them, the fourth NFC radiation field overlaps at least partially with the third NFC radiation field. It can be understood that since the direction of the induced current I3 is the same as the direction of the current I1 flowing through the first coil portion 233, the direction of the fourth NFC radiation field is the same as the direction of the third NFC radiation field. Therefore, the fourth NFC radiation field and the third NFC radiation field can be superimposed on each other, thereby further enhancing the range of the NFC radiation field around the electronic device 100, and enhancing the NFC field strength in the overlapping area. Thereby, the effective reading and writing (card swiping) area of ​​the NFC antenna of the electronic device 100 can be further increased, and the stability of the NFC antenna of the electronic device 100 during reading and writing (card swiping) can be improved.

[0090] In some embodiments, reference Fig.12 , Fig.12 This is a seventh structural diagram of the electronic device 100 provided in an embodiment of the present application.

[0091] The electronic device 100 also includes a flexible printed circuit (FPC) 241. The FPC 241 is electrically connected to the circuit board 13. The FPC 241 may be, for example, a structure such as an FPC for a display screen, an FPC for a camera, an FPC for a motor, or an independent FPC for realizing the function of an NFC antenna. The FPC 241 may be fixed in the housing of the electronic device 100. A metal trace is provided on the FPC 241, and the metal trace is used to transmit signals, for example, control signals for a display screen, control signals for a camera, control signals for a motor, etc. The metal trace on the FPC 241 forms the first metal coil 23. Therefore, the first metal coil 23 can be formed by the metal trace on the existing FPC in the electronic device 100, without the need to separately set up the first metal coil, and the function reuse of the FPC can be realized, so the design of the NFC antenna can be further simplified.

[0092] In some embodiments, reference Fig.13 , Fig.13 A schematic structural diagram of a first metal coil 23, a flexible circuit board 241, and a radiation field enhancer 242 of an electronic device provided in an embodiment of the present application.

[0093] The electronic device 100 also includes a radiation field enhancer 242. The material of the radiation field enhancer 242 may include an insulating material. For example, the radiation field enhancer 242 may include a ferrite layer. The ferrite layer is formed of a ferrite material, and the ferrite material may be a nickel-copper-zinc system material having a specified content of iron oxide, copper oxide, zinc oxide, and nickel oxide. In addition, the ferrite material may also include some auxiliary materials, such as a specified content of bismuth oxide, silicon oxide, magnesium oxide, cobalt oxide, and the like. The radiation field enhancer 242 may be used to enhance the strength of the NFC radiation field.

[0094] The radiation field enhancer 242 is disposed on one side of the FPC 241, for example, on the side of the FPC 241 that radiates the NFC signal to the outside, and the radiation field enhancer 242 abuts against the FPC 241. The radiation field enhancer 242 can be used to enhance the strength of the NFC radiation field generated when the first metal coil 23 transmits the differential excitation current, thereby enhancing the strength of the NFC signal radiated by the first metal coil 23 to the outside, thereby improving the performance of the NFC antenna.

[0095] In some embodiments, reference Fig.14 , Fig.14 This is a schematic diagram of the eighth structure of the electronic device 100 provided in the embodiment of the present application.

[0096] The electronic device 100 further includes a ground plane 251 and a metal connector 252. The ground plane 251 is used to form a common ground. The ground plane 251 can be formed by a conductor, a printed circuit, or a metal printed layer in the electronic device 100. For example, the ground plane 251 can be arranged on a circuit board 13 of the electronic device 100. For another example, the ground plane 251 can also be formed by a middle frame of a metal material. The metal connector 252 can be a rib formed by a metal material such as a magnesium alloy, an aluminum alloy, or the like.

[0097] The first conductor structure 22 further includes a grounding point 223, which is used to achieve grounding of the first conductor structure 22. The grounding point 223 is located between the first electrical connection point 221 and the second electrical connection point 222. It can be understood that when the first conductor structure 22 is grounded, the intensity of the NFC signal radiated by the first conductor structure 22 can be enhanced compared to when the first conductor structure 22 is not grounded, thereby enhancing the performance of the NFC antenna.

[0098] The grounding point 223 is connected to the grounding plane 251 through the metal connector 252 to achieve grounding of the first conductor structure 22. For example, in practical applications, the grounding plane 251 may be a middle frame, the first conductor structure 22 may be a metal branch formed on the metal frame 122, and the metal connector 252 may be a rib formed between the middle frame and the metal frame 122. On the one hand, the first conductor structure 22 may be grounded through the rib, and on the other hand, the connection stability between the middle frame and the metal frame 122 may be enhanced through the rib.

[0099] In some embodiments, reference Fig.15 , Fig.15 This is a ninth structural diagram of the electronic device 100 provided in an embodiment of the present application.

[0100] The metal connector 252 is provided with a slit 2521, which divides the metal connector 252 into two parts, namely, a first part 2522 and a second part 2523. The first part 2522 can supply the current on the first conductor structure 22 back to the ground, and the second part 2523 can supply the current returned to the ground to flow back to the first conductor structure 22. The current on the first part 2522 returning to the ground is greater than the current on the second part 2523 flowing back to the first conductor structure 22.

[0101] It can be understood that since the metal connector 252 is divided into the first part 2522 and the second part 2523 by the gap 2521, the second part 2523 can allow part of the return current to flow back to the first conductor structure 22, thereby reducing the final return current to the ground, that is, reducing the current loss of the first conductor structure 22 when transmitting the differential excitation current, so that the field strength of the NFC radiation field generated by the first conductor structure 22 when transmitting the differential excitation current can be increased, thereby enhancing the NFC signal strength.

[0102] In some embodiments, reference Fig.16 , Fig.16 This is a tenth structural schematic diagram of the electronic device 100 provided in an embodiment of the present application.

[0103] The electronic device 100 also includes a non-near field communication chip IC1. IC1 can be one of a cellular communication chip, a Wi-Fi (Wireless Fidelity) chip, a GPS (Global Positioning System) chip, and a BT (Bluetooth) chip. IC1 is used to provide a non-near field communication excitation current. Accordingly, the non-near field communication excitation current can be one of a cellular communication excitation current, a Wi-Fi communication excitation current, a GPS communication excitation current, and a BT communication excitation current. Among them, the non-near field communication chip IC1 can be set on the circuit board 13 of the electronic device 100, or it can also be integrated on an independent circuit board in the electronic device 100.

[0104] The first conductor structure 22 also includes a fifth electrical connection point 224. The fifth electrical connection point 224 can also be used to feed an excitation current to the first conductor structure 22. The fifth electrical connection point 224 can be arranged between the first electrical connection point 221 and the second electrical connection point 222. Among them, the fifth electrical connection point 224 is electrically connected to the non-near field communication chip IC1. Thus, the non-near field communication chip IC1 can feed a non-near field communication excitation current to the first conductor structure 22 through the fifth electrical connection point 224. The first conductor structure 22 can also be used to transmit the non-near field communication excitation current and radiate a corresponding wireless signal to the outside to achieve a corresponding communication function.

[0105] Therefore, the non-near field communication chip IC1 and the NFC IC 21 can reuse the first conductor structure 22, so that the first conductor structure 22 can simultaneously realize the functions of two antennas, thereby reducing the number of antennas in the electronic device 100, which is beneficial to the overall antenna design of the electronic device 100.

[0106] In some embodiments, reference Fig.17 , Fig.17This is an eleventh structural diagram of the electronic device 100 provided in an embodiment of the present application.

[0107] The electronic device 100 further includes a first matching circuit M1 and a second matching circuit M2. The matching circuit may also be referred to as a matching network, a tuning circuit, a tuning network, etc. It is understandable that the first matching circuit M1 and the second matching circuit M2 may both include a circuit composed of capacitors and inductors connected in series or in parallel.

[0108] The NFC IC 21 is electrically connected to the first conductor structure 22 and the first metal coil 23 through the first matching circuit M1. In some embodiments, the first electrical connection point 221 of the first conductor structure 22 is electrically connected to the first differential signal terminal 211 of the NFC IC 21 through the first matching circuit M1. The second terminal 232 of the first metal coil 23 is electrically connected to the second differential signal terminal 212 of the NFC IC 21 through the first matching circuit M1. The first matching circuit M1 is used to match the impedance when the first conductor structure 22 and the first metal coil 23 transmit the differential excitation current.

[0109] In some embodiments, the first matching circuit M1 includes a first input terminal P1, a second input terminal P2, a first output terminal P3, and a second output terminal P4. The first input terminal P1 is electrically connected to the first differential signal terminal 211. The second input terminal P2 is electrically connected to the second differential signal terminal 212. The first output terminal P3 is electrically connected to the first electrical connection point 221 of the first conductor structure 22. The second output terminal P4 is electrically connected to the second end 232 of the first metal coil 23.

[0110] The fifth electrical connection point 224 of the first conductor structure 22 is electrically connected to the non-near field communication chip IC1 through the second matching circuit M2. The second matching circuit M2 is used to match the impedance of the first conductor structure 22 when transmitting the non-near field communication excitation current.

[0111] In some embodiments, reference Fig.18 , Fig.18 This is a twelfth structural diagram of the electronic device 100 provided in an embodiment of the present application.

[0112] The electronic device 100 further includes a first filter circuit LC1, a second filter circuit LC2 and a third filter circuit LC3. The filter circuit may also be referred to as a filter network. It is understandable that the first filter circuit LC1, the second filter circuit LC2 and the third filter circuit LC3 may include a circuit composed of a series or parallel connection of capacitors and inductors.

[0113] The first filter circuit LC1 is disposed between the first differential signal terminal 211 and the first input terminal P1. The first filter circuit LC1 is used to filter out the first interference signal between the first differential signal terminal 211 and the first input terminal P1. The first interference signal is an electrical signal other than the differential excitation current provided by the NFC IC 21.

[0114] The second filter circuit LC2 is disposed between the second differential signal terminal 212 and the second input terminal P2. The second filter circuit LC2 is used to filter out the second interference signal between the second differential signal terminal 212 and the second input terminal P2. The second interference signal is an electrical signal other than the differential excitation current provided by the NFC IC 21.

[0115] The third filter circuit LC3 is arranged between the non-near field communication chip IC1 and the second matching circuit M2. The third filter circuit LC3 is used to filter the third interference signal between the non-near field communication chip IC1 and the second matching circuit M2. The third interference signal is an electrical signal other than the non-near field communication excitation current provided by the non-near field communication chip IC1.

[0116] In some embodiments, reference Fig.19 , Fig.19 A first principle schematic diagram of the antenna device of the electronic device 100 provided in an embodiment of the present application.

[0117] The first matching circuit M1 may include, for example, capacitors C1, C2, C3, C4, C5, and C6. Among them, capacitor C1 is connected in series with the first differential signal terminal 211 of NFCIC 21, and capacitor C2 is connected in series with the second differential signal terminal 212 of NFC IC 21. Capacitor C3 is connected in series with capacitor C4, and after the series connection, it is connected in parallel with NFC IC 21, and capacitor C3 and capacitor C4 are grounded. Capacitor C5 is connected in series with capacitor C6, and after the series connection, it is connected in parallel with NFC IC 21, and capacitor C5 and capacitor C6 are grounded. It can be understood that the capacitance values ​​of capacitors C1, C2, C3, C4, C5, and C6 can be set according to actual needs.

[0118] The first filter circuit LC1 may include, for example, an inductor L1 and a capacitor C7. The inductor L1 is connected in series between the first differential signal terminal 211 and the first matching circuit M1, and the capacitor C7 is connected in parallel with the NFC IC 21 and grounded. It can be understood that the inductance value of the inductor L1 and the capacitance value of the capacitor C7 can be set according to actual needs.

[0119] The second filter circuit LC2 may include, for example, an inductor L2 and a capacitor C8. The inductor L2 is connected in series between the second differential signal terminal 212 and the first matching circuit M1, and the capacitor C8 is connected in parallel with the NFC IC 21 and grounded. It can be understood that the inductance value of the inductor L2 and the capacitance value of the capacitor C8 can be set according to actual needs.

[0120] The second matching circuit M2 may include, for example, capacitors C9 and C10. The capacitor C9 is connected in series between the fifth electrical connection point 224 of the first conductor structure 22 and the non-near field communication chip IC1, and the capacitor C10 is connected in parallel with the non-near field communication chip IC1 and grounded. It can be understood that the capacitance values ​​of the capacitors C9 and C10 can be set according to actual needs.

[0121] The third filter circuit LC3 may include, for example, an inductor L3 and a capacitor C11. The inductor L3 is connected in series between the non-near field communication chip IC1 and the second matching circuit M2, and the capacitor C11 is connected in parallel with the non-near field communication chip IC1 and grounded. It can be understood that the inductance value of the inductor L3 and the capacitance value of the capacitor C11 can be set according to actual needs.

[0122] In some embodiments, reference Fig. 20 , Fig. 20 A second principle schematic diagram of the antenna device of the electronic device 100 provided in an embodiment of the present application.

[0123] Fig. 20 and Fig.19 The difference is that the first matching circuit M1 only includes capacitors C1, C2, C3, and C5. Among them, capacitor C1 is connected in series with the first differential signal terminal 211 of NFC IC 21, and capacitor C2 is connected in series with the second differential signal terminal 212 of NFC IC 21. Capacitor C3 is connected in parallel with NFC IC 21, and capacitor C5 is also connected in parallel with NFC IC 21. It can be understood that the capacitance values ​​of capacitors C1, C2, C3, and C5 can be set according to actual needs.

[0124] The electronic device provided by the embodiment of the present application is described in detail above. The principle and implementation method of the present application are described in detail using specific examples herein, and the description of the above embodiments is only used to help understand the present application. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as limiting the present application.

Claims

1. An electronic device, characterized in that: include: A metal back shell, wherein a camera hole is provided on the metal back shell, and the camera hole is used to install a camera module; A near field communication chip, comprising a first differential signal terminal and a second differential signal terminal, wherein the first differential signal terminal and the second differential signal terminal are used to provide a differential excitation current; a first conductor structure, the first conductor structure comprising a first electrical connection point, a second electrical connection point and a ground point, the first electrical connection point being electrically connected to the first differential signal terminal; a first metal coil, wherein the first metal coil at least partially covers a portion of the camera hole, a first end of the first metal coil is electrically connected to the second electrical connection point, and a second end of the first metal coil is electrically connected to the second differential signal end; wherein the first conductor structure and the first metal coil are used to transmit the differential excitation current together, and the first metal coil radiates a near field communication signal to the outside through the camera hole; and A metal connector, wherein the metal connector is respectively connected to the grounding point and the grounding plane to realize grounding of the first conductor structure; a gap is provided on the metal connector, and the gap divides the metal connector into a first part and a second part, the first part is used to supply the current on the first conductor structure back to the ground, and the second part is used to supply the current returned to the ground to flow back to the first conductor structure; wherein the current on the first part returning to the ground is greater than the current on the second part flowing back to the first conductor structure.

2. The electronic device according to claim 1, characterized in that: The first conductor structure forms a first near field communication radiation field when transmitting the differential excitation current, and the first metal coil forms a second near field communication radiation field when transmitting the differential excitation current, and the second near field communication radiation field at least partially overlaps with the first near field communication radiation field.

3. The electronic device according to claim 1, characterized in that: The first metal coil has multiple turns, and the multiple turns of the first metal coil form a first coil portion and a second coil portion. The first coil portion covers a partial area of ​​the camera hole, and the second coil portion covers a partial area of ​​the metal back shell. The direction of the current in the first coil portion is opposite to the direction of the current in the second coil portion.

4. The electronic device according to claim 3, characterized in that: The partial area of ​​the metal rear shell generates an induced current under the action of the current in the second coil part, and the direction of the induced current is the same as the direction of the current in the first coil part.

5. The electronic device according to claim 4, characterized in that: The first coil portion generates a third near field communication radiation field when transmitting the differential excitation current, and generates a fourth near field communication radiation field when the induced current is transmitted in the metal back shell, and the fourth near field communication radiation field at least partially overlaps with the third near field communication radiation field.

6. The electronic device according to claim 1, characterized in that: The number of turns of the first metal coil is one turn, and the one turn of the first metal coil covers a partial area of ​​the camera hole.

7. The electronic device according to any one of claims 1 to 6, characterized in that: Also includes: A flexible circuit board is provided with metal traces on the flexible circuit board, and the metal traces form the first metal coil.

8. The electronic device according to claim 7, characterized in that: Also includes: A radiation field enhancer is provided on one side of the flexible circuit board, and is used to enhance the intensity of the near field communication radiation field generated when the first metal coil transmits the differential excitation current.

9. The electronic device according to any one of claims 1 to 6, characterized in that: Also includes: a second conductor structure, the second conductor structure comprising a third electrical connection point and a fourth electrical connection point, the third electrical connection point being electrically connected to the second end of the first metal coil, and the fourth electrical connection point being electrically connected to the second differential signal end, so that the second end of the first metal coil is electrically connected to the second differential signal end; The first conductor structure, the first metal coil and the second conductor structure are used to transmit the differential excitation current together.

10. The electronic device according to claim 9, characterized in that: Also includes: a second metal coil, wherein the second metal coil at least partially covers a portion of the camera hole, a third end of the second metal coil is electrically connected to the second end of the first metal coil, and a fourth end of the second metal coil is electrically connected to the third electrical connection point, so that the third electrical connection point is electrically connected to the second end of the first metal coil; The first conductor structure, the first metal coil, the second metal coil and the second conductor structure are used to jointly transmit the differential excitation current, and the first metal coil and the second metal coil cover different areas of the camera hole.

11. The electronic device according to any one of claims 1 to 6, characterized in that: Also includes: A camera module is installed in the camera hole, the camera module includes a non-metallic element, and the first metal coil at least partially covers a portion of the non-metallic element.

12. The electronic device according to claim 11, characterized in that: The camera module is a rear camera module.

13. The electronic device according to any one of claims 1 to 6, characterized in that: The grounding point is located between the first electrical connection point and the second electrical connection point.

14. The electronic device according to any one of claims 1 to 6, characterized in that: Also includes: A first matching circuit, wherein the first electrical connection point is electrically connected to the first differential signal end through the first matching circuit, and the second end of the first metal coil is electrically connected to the second differential signal end through the first matching circuit, and the first matching circuit is used to match the impedance of the first conductor structure and the first metal coil when transmitting the differential excitation current.

15. The electronic device according to claim 14, characterized in that: The first matching circuit includes a first input terminal, a second input terminal, a first output terminal and a second output terminal; The first input terminal is electrically connected to the first differential signal terminal, the second input terminal is electrically connected to the second differential signal terminal, the first output terminal is electrically connected to the first electrical connection point, and the second output terminal is electrically connected to the second end of the first metal coil.

16. The electronic device according to any one of claims 1 to 6, characterized in that: Also includes: A non-near field communication chip, used for providing a non-near field communication excitation current; The first conductor structure further includes a fifth electrical connection point, the fifth electrical connection point is electrically connected to the non-near field communication chip, and the first conductor structure is also used to transmit the non-near field communication excitation current.

17. The electronic device according to claim 16, characterized in that: Also includes: A second matching circuit, wherein the fifth electrical connection point is electrically connected to the non-near field communication chip through the second matching circuit, and the second matching circuit is used to match the impedance of the first conductor structure when transmitting the non-near field communication excitation current.

18. The electronic device according to any one of claims 1 to 6, characterized in that: Also includes: A metal frame having metal branches formed thereon, wherein the metal branches form the first conductor structure.

19. The electronic device according to claim 18, characterized in that: The metal frame is provided with a first gap and a second gap at intervals, and the metal branch is formed between the first gap and the second gap.

Images