Near field communication antenna setting method, device and electronic equipment

Abstract

The embodiment of the present invention discloses a method, device and electronic device for setting a near-field communication antenna, which is applied to the technical field of electronic devices. In the embodiment of the present invention, when setting a near-field communication antenna in an electronic device with multiple physical buttons, at least one high-frequency antenna signal end is directly set to the circuit where the physical button is located, and no separate space is required to deploy the near-field communication antenna, which saves space for near-field communication implementation. The first capacitor, the second capacitor, the first inductor and the second inductor are set in the button circuit of the electronic device through the characteristics that the capacitor blocks low-frequency signals and passes high-frequency signals, and the inductor blocks high-frequency signals and passes low-frequency signals, so that the use of the physical buttons and the use of the near-field communication antenna are independent of each other and do not interfere with each other.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic equipment, and in particular to a near field communication antenna setting method, device and electronic equipment. Background Art

[0002] Near Field Communication (NFC) is an emerging technology. Electronic devices (such as mobile phones) that use NFC technology can exchange data when they are close to each other. It is an integration of contactless radio frequency identification (RFID) and interconnection technology. By integrating the functions of inductive card readers, inductive cards and point-to-point communication on a single chip, electronic devices can be used to realize mobile payment, electronic ticketing, access control, mobile identity recognition, anti-counterfeiting and other applications.

[0003] Conventional NFC antennas are usually loop antennas wound around flexible printed circuits (FPC), which are usually designed around the back of electronic devices or under the screen. However, some electronic devices have more physical button areas, and NFC antennas cannot be deployed in these areas, making these electronic devices unable to use the NFC function. Summary of the invention

[0004] The embodiments of the present invention provide a near field communication antenna setting method, device and electronic device, which realize the deployment of an NFC antenna in a physical key area of ​​the electronic device.

[0005] An embodiment of the present invention provides a method for setting a near field communication antenna, comprising:

[0006] Determine a plurality of key circuits included in the electronic device, each key circuit comprising a physical key connected to a low-frequency drive signal terminal;

[0007] In each group of key circuits, at least one first inductor is arranged in a low-frequency path of each physical key driven by the low-frequency driving signal end;

[0008] Determine a high-frequency path formed by a plurality of the physical keys;

[0009] At least one high-frequency antenna signal terminal is connected to one of the low-frequency drive signal terminals through a corresponding first capacitor, and the high-frequency antenna signal terminal is connected to the high-frequency path, wherein physical keys not connected in the key circuit in the same high-frequency path are connected by a second capacitor, and physical keys connected in the key circuit between different high-frequency paths are connected by a second inductor.

[0010] Another aspect of the present invention provides a near field communication antenna setting device, including:

[0011] A circuit determination unit, used to determine a plurality of key circuits included in the electronic device, each key circuit comprising a physical key connected to a low-frequency drive signal terminal;

[0012] A low-frequency setting unit, used for setting at least one first inductor in a low-frequency path of each physical key driven by the low-frequency driving signal end in each group of key circuits;

[0013] A path determination unit, used to determine a high-frequency path formed by a plurality of the physical keys;

[0014] The antenna setting unit is used to set at least one high-frequency antenna signal end to be connected to a low-frequency drive signal end through a corresponding first capacitor, and to set the high-frequency antenna signal end to be connected to the high-frequency path, wherein the physical keys not connected in the key circuit in the same high-frequency path are connected by a second capacitor, and the physical keys connected in the key circuit between different high-frequency paths are connected by a second inductor.

[0015] Another aspect of an embodiment of the present invention provides an electronic device, in which a plurality of physical buttons and a near field communication antenna system are deployed;

[0016] The near field communication antenna system is formed by reusing the circuits where the multiple physical buttons are located according to the near field communication antenna setting method as described in one aspect of the embodiment of the present invention.

[0017] It can be seen that in the embodiment of the present invention, when a near-field communication antenna is set in an electronic device equipped with multiple physical buttons, at least one high-frequency antenna signal end is directly set in the circuit where the physical button is located, and there is no need to deploy the near-field communication antenna in a separate space, which saves space for near-field communication implementation. By taking advantage of the characteristics that capacitors block low-frequency signals and pass high-frequency signals, and inductors block high-frequency signals and pass low-frequency signals, a first capacitor, a second capacitor, a first inductor, and a second inductor are set in the button circuit of the electronic device, so that the use of the physical buttons and the use of the near-field communication antenna are independent of each other and do not interfere with each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 is a schematic diagram of an electronic device provided with a near field communication antenna according to an embodiment of the present invention;

[0020] Figure 2 is a flow chart of a near field communication antenna setting method provided by an embodiment of the present invention;

[0021] Figure 3a is a schematic diagram of multiple groups of key circuits in an electronic device determined in an embodiment of the present invention;

[0022] Figure 3b is a circuit diagram of a power button in an electronic device determined in an embodiment of the present invention;

[0023] Figure 4 It is a specific wiring structure after a near field communication antenna is deployed inside an electronic device in a specific application embodiment of the present invention;

[0024] Figure 5 is a schematic diagram of the circuit structure of an electronic device after a near field communication antenna is provided in a specific application embodiment of the present invention;

[0025] Figure 6 is a schematic diagram of the circuit structure of a power button provided in a specific application embodiment of the present invention;

[0026] Figure 7 It is a schematic diagram of the logical structure of a near field communication antenna setting device in an embodiment of the present invention. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0029] The embodiment of the present invention provides a near field communication antenna setting method, which is mainly used in Figure 1In the electronic device 110 shown in which multiple physical buttons 100 are deployed, such as an access lock with physical buttons, a physical button mobile phone, etc., a near field communication antenna is set in the electronic device. In this embodiment, the near field communication (hereinafter referred to as NFC) antenna is not deployed on the back or under the screen of the electronic device 110, but the circuits between the physical buttons 100 in the electronic device 110 are reused to form a unique NFC antenna. At the same time, the operation of the NFC antenna does not interfere with the use of the physical buttons 100.

[0030] like Figure 2 As shown, the near field communication antenna setting method in the embodiment of the present invention includes:

[0031] Step 101: determine a plurality of key circuits included in the electronic device, each key circuit comprising a physical key connected to a low-frequency driving signal terminal.

[0032] It can be understood that when each electronic device deploys a physical key 100, it is mainly divided into two parts, namely, the appearance part of the physical key 100 deployed on the housing of the electronic device 110 and provided for the user to press, and the circuit connection part of the physical key 100 deployed in the internal circuit system of the electronic device 110. In this way, when the user presses the appearance part of the physical key 100, the appearance part and the circuit connection part are connected, thereby connecting the circuit where the physical key 100 is located. The physical key 100 described below mainly refers to the circuit connection part of the physical key 100 in the internal circuit system of the electronic device 110.

[0033] What is determined in this step 101 is mainly the circuit connection part of the physical key 100 deployed in the internal circuit system of the electronic device 110.

[0034] Generally speaking, in order to facilitate the wiring setting and simplify the circuit of the physical key, multiple adjacent physical keys 100 can be driven by a low-frequency driving signal according to the position of the physical key 100 deployed in the electronic device 110, so that the multiple adjacent physical keys 100 can be connected to the same low-frequency driving signal terminal 120. Among all the physical keys 100, there are some special physical keys, such as physical keys that need to be set separately, etc. These physical keys can be connected to another low-frequency driving signal terminal 120 respectively. The low-frequency driving signal here refers to the low-frequency signal required when using the physical key and used to drive the physical key.

[0035] For example Figure 3aThe physical keys K2, K1, K9, K17 and K24 shown in the figure can be driven by the low-frequency drive signal of the same low-frequency drive signal terminal KROW3 respectively; the physical keys K3, K8, K10, K18 and K23 can be driven by the low-frequency drive signal of the same low-frequency drive signal terminal KROW1 respectively; the physical keys K4, K7, K11, K19 and K22 can be driven by the low-frequency drive signal of the same low-frequency drive signal terminal KROW0 respectively; the physical keys K5, K6, K12, K13 and K20 can be driven by the low-frequency drive signal of the same low-frequency drive signal terminal KROW2 respectively. The physical keys K14, K15 and K16 that need to be set separately can be driven by the low-frequency drive signal of the same low-frequency drive signal terminal KROW4 respectively. As shown in the figure Figure 3b As shown, the physical key K21 is a power key, which is driven by a power signal PWRKEY.

[0036] Step 102: in each group of key circuits, at least one first inductor is arranged in a low-frequency path of each physical key driven by a low-frequency driving signal end.

[0037] In this embodiment, by setting the first inductor 200 in the low-frequency path, the first inductor 200 can pass low-frequency signals and block high-frequency signals. When the user presses the appearance part of the physical key from the outside of the electronic device, the appearance part of the physical key and the circuit connection part are connected, thereby connecting the circuit where the physical key 100 is located, that is, the low-frequency path. In this case, the low-frequency signal circulates in the circuit where the physical key 100 is located, and the low-frequency signal can be passed through the first inductor 200, so that the physical key 100 can be used normally.

[0038] For example Figure 4 As shown in, the low-frequency drive signal needs to pass through two second inductors L108, L106, a physical button K4 and another second inductor L105 from the low-frequency drive signal terminal KROW0 to the low-frequency drive signal terminal KCOL0; the low-frequency drive signal needs to pass through a second inductor L108, a physical button K11 and another second inductor L101 from the low-frequency drive signal terminal KROW0 to the low-frequency drive signal terminal KCOL0; the low-frequency drive signal needs to pass through a second inductor L116, a physical button K3 and another second inductor L110 from the low-frequency drive signal terminal KROW1 to the low-frequency drive signal terminal KCOL0, and so on.

[0039] Step 103, determine the high-frequency path formed by multiple physical buttons. The high-frequency path here refers to a path that can connect the high-frequency antenna signal. In this step, specifically determine the information such as each physical button included in the high-frequency path and the connection order between each physical button.

[0040] Step 104, set at least one high-frequency antenna signal terminal to be connected to a low-frequency drive signal terminal through a corresponding first capacitor, and set the high-frequency antenna signal terminal to be connected to a high-frequency path; wherein, the physical keys that are not connected in the above-mentioned key circuit in the same high-frequency path are connected by a second capacitor, and the physical keys that are connected in the above-mentioned key circuit between different high-frequency paths are connected by a second inductor. In this way, the connection between the high-frequency antenna signal and the high-frequency path constitutes a near-field communication antenna.

[0041] In this embodiment, a high-frequency path determined in the embodiment may include some or all of the physical buttons, and a high-frequency antenna signal terminal 130 may be connected to one or more high-frequency paths. Figure 4 As shown, the physical button forms two high-frequency paths, and the two high-frequency paths can be driven mainly by a high-frequency antenna signal received by a high-frequency antenna signal terminal 130. The high-frequency antenna signal here mainly refers to the high-frequency signal required for driving the path connection of the near-field communication antenna. Specifically:

[0042] A high-frequency path includes an inner circle path, and the inner circle path includes the first physical keys deployed in the inner circle of the electronic device, and the first physical keys are connected in sequence according to the positions deployed in the inner circle of the electronic device, such as physical keys K3, K8, K10, K15, K18, K19, K14, K11 and K7.

[0043] Another high-frequency path includes an outer ring path, and the outer ring path includes second physical keys arranged in the outer ring of the electronic device, and the second physical keys are connected in sequence according to the positions arranged in the outer ring of the electronic device, such as physical keys K2, K1, K9, K16, K17, K24, K23, K22, K21, K20, K13, K12, K6, K5 and K4.

[0044] In other embodiments, in order to enhance the signal strength of near-field communication, a larger number of high-frequency antenna signal terminals for receiving high-frequency antenna signals may be provided, and correspondingly, the same number of high-frequency antenna signal terminals for transmitting high-frequency antenna signals may be provided, and each high-frequency antenna signal terminal may be connected to a high-frequency path formed by some physical keys, and there is no restriction here on which physical keys are specifically connected to the high-frequency path. In this process, it is ensured as much as possible that the multiple high-frequency antenna signal terminals in the electronic device can cover all physical buttons in the electronic device when connected to the high-frequency path, so that the area of ​​the near-field communication antenna is as large as possible, thereby ensuring the signal strength of the near-field communication. A simpler setting is that there are no repeated physical buttons between the high-frequency paths connected to different high-frequency antenna signal terminals.

[0045] In addition, it should be noted that in the process of setting the high-frequency path, the connection between the physical keys that are already connected in the circuit where the physical keys are located can be directly reused, and the second capacitor 220 can be used to connect the physical keys that are not connected in the circuit where the physical keys are located.

[0046] For example Figure 5 As shown, the physical keys K2, K1 and K9 in the outer circle path are already connected physical keys in the key circuit determined in the above step 101, and can be directly reused; the physical keys K9 and K16 are connected through the second capacitor 220 (i.e., C114), and the physical keys K16 and K17 are connected through another second capacitor 220 (i.e., C111); the physical keys K17 and K24 are already connected in the key circuit determined in the above step 101, and can be directly reused; the physical keys K24 and K23, K23 and K22, K22 and K21, and K21 and K20 need to be connected by capacitors C108, C106, C101 and C107, respectively; the physical keys K20, K13, K12, K6, and K5 are already connected in the key circuit determined in the above step 101, and can be directly reused; the physical keys K5 and K4 need to be connected by capacitor C105.

[0047] Another example Figure 5 As shown, in the inner circle path, the physical keys K3, K8, and K10 are already connected in the key circuit determined in the above step 101 and can be directly reused; capacitors C109, C113, C103, C115, and C112 need to be respectively set between the physical keys K10 and K15, K15 and K18, K18 and K19, K19 and K14, and K14 and K11; the physical keys K14, K11, and K7 are already connected in the key circuit determined in the above step 101 and can be directly reused.

[0048] In this way, since the existing connection in the circuit where the physical button is located is reused in the high-frequency path, in order to prevent the use of the near-field communication antenna and the use of the physical button from interfering with each other, the path using the near-field communication antenna uses a high-frequency signal, while the path using the physical button uses a low-frequency signal. When the near-field communication antenna set in the electronic device is used, the high-frequency antenna signal is input from the high-frequency antenna signal terminal 130, and the first capacitor 210 and the second capacitor 220 can pass the high-frequency signal and block the low-frequency signal well, so that each high-frequency path is connected through the capacitor, and the low-frequency signal when the physical button is used can be blocked, so that the use of the physical button does not affect the use of the near-field communication antenna; and when the physical button is used, the low-frequency drive signal is input from the low-frequency drive signal terminal 120, and the physical button is connected through the inductor, which can block the high-frequency signal when the high-frequency antenna signal terminal 130 is used, so that the use of the near-field communication antenna does not affect the use of the physical button, so that the signals of the low-frequency path using the physical button and the high-frequency path using the near-field communication antenna do not affect each other.

[0049] In a specific embodiment, a plurality of high-frequency antenna signal terminals for receiving high-frequency antenna signals can be set in the electronic device, and the same number of high-frequency antenna signal terminals for transmitting high-frequency antenna signals can be set accordingly, so that each high-frequency antenna signal terminal 130 can be connected to a high-frequency path. The electronic device includes multiple high-frequency paths, and it is necessary to block the multiple high-frequency paths so as not to interfere with each other. If multiple physical keys that are connected in the circuit where the physical keys are located are in different high-frequency paths and need to be blocked, the second inductor 230 can be used for blocking.

[0050] For example Figure 5 As shown, the physical key K23 is connected to the physical keys K18, K10, K8, and K3 in the key path determined in the above step 101, but are in different high-frequency paths, and a second inductor 230, namely, inductors L115 and L117, is required to be added to isolate the two high-frequency paths; the physical key K22 is connected to the physical keys K19, K11, and K7 in the key path determined in the above step 101, and is required to add isolating inductors L107 and L109; the physical key K4 is connected to the physical keys K19, K11, and K7 in the key path determined in the above step 101, and are in different high-frequency paths, and a second inductor 230, namely, inductor L106, is required to be added to isolate; the physical keys K14, K15, and K16 are connected in the key path determined in the above step 101, and is required to set isolating inductors L134 and L135 between each pair.

[0051] In other specific embodiments, only one high-frequency antenna signal terminal 130 may be set in the electronic device, and correspondingly, a high-frequency antenna signal terminal for transmitting high-frequency antenna signals may also be set, and all physical buttons in the electronic device form multiple high-frequency paths, which can be connected to one of the multiple high-frequency paths through a high-frequency antenna signal terminal 130, and two adjacent pairs of high-frequency paths in the multiple high-frequency paths are connected through a third capacitor 240.

[0052] For example Figure 5 As shown, the physical key K3 and the physical key K4 belong to the inner circle path and the outer circle path respectively. When these two paths need to share a high-frequency antenna signal at a high-frequency antenna signal end, a third capacitor 240, namely capacitor C104, can be connected between the physical keys K3 and K4.

[0053] Furthermore, in other embodiments, the physical button in the electronic device includes a power button, and the high-frequency path includes the power button, and the power button is connected to the ground line through the third inductor 250 .

[0054] For example Figure 6 The figure shows a circuit structure diagram of a power button K21 in an electronic device. In addition to the inductor L136 connected between the power button K21 and its driving signal, i.e., the power signal (PWRKEY), a third inductor 250, i.e., an inductor L137, is also connected between the power button K21 and the ground line (GND).

[0055] In a specific embodiment, in order to realize the connection between the power button and two adjacent physical buttons in the high-frequency path, the physical buttons adjacent to the power button in the high-frequency path are respectively connected to the specific end of the near-field communication antenna through the fourth capacitor 260, and the power button is also connected to the specific end of the near-field communication antenna. In this way, by connecting them to the same specific end, the connection between the power button and the two adjacent physical buttons can be realized.

[0056] For example Figure 5 As shown, for the two physical buttons K22 and K20 adjacent to the power button K21, the two physical buttons K22 and K20 can be connected to a specific end (PWR_NFC) of the near-field communication antenna through capacitors C101 and C107, respectively, and the power button K21 is also connected to the specific end (PWR_NFC) of the near-field communication antenna, thereby realizing the connection between the power button K21 and the two adjacent physical buttons K22 and K20, respectively.

[0057] It can be seen that in the embodiment of the present invention, when a near-field communication antenna is set in an electronic device equipped with multiple physical buttons, at least one high-frequency antenna signal end is directly set in the circuit where the physical button is located, and there is no need to deploy the near-field communication antenna in a separate space, which saves space for near-field communication implementation. By taking advantage of the characteristics that capacitors block low-frequency signals and pass high-frequency signals, and inductors block high-frequency signals and pass low-frequency signals, a first capacitor, a second capacitor, a first inductor, and a second inductor are set in the button circuit of the electronic device, so that the use of the physical buttons and the use of the near-field communication antenna are independent of each other and do not interfere with each other.

[0058] The following is a specific application example to illustrate the near field communication antenna setting method of the present invention. Figures 4 to 6 As shown, in this embodiment, the electronic device in which the near field communication antenna is arranged includes 24 physical keys K1 to K24, such as Figure 4 As shown, the near-field communication antenna is a thick black line connected around the physical button. The near-field communication antenna effect is achieved by adding an inductor and capacitor filtering network to the circuit where the physical button is located, and connecting the outer circle of the physical button into a ring. Specifically:

[0059] (1) Determine multiple sets of key circuits included in the electronic device, each set of key circuits includes a physical key connected to a low-frequency drive signal terminal, wherein:

[0060] Physical keys K2, K1, K9, K17 and K24 can be connected to the same low-frequency drive signal terminal KROW3; physical keys K3, K8, K10, K18 and K23 can be connected to the same low-frequency drive signal terminal KROW1; physical keys K4, K7, K11, K19 and K22 can be connected to the same low-frequency drive signal terminal KROW0; physical keys K5, K6, K12, K13 and K20 can be connected to the same low-frequency drive signal terminal KROW2. Physical keys K14, K15 and K16 that need to be set separately can be connected to the same low-frequency drive signal terminal KROW4.

[0061] The physical keys in each group of key circuits can be driven by different combinations of KCOL and KROW signals. Specifically, in order to facilitate the wiring setting, the physical keys on the same vertical line or horizontal line are driven by the same KCOL signal or KROW signal to simplify the difficulty of key circuit setting. Figure 5As shown, the low-frequency drive signal of the low-frequency drive signal terminal KROW0 can drive the physical keys K4, K7, K11, K19 and K22; the low-frequency drive signal of the low-frequency drive signal terminal KROW1 can drive the physical keys K3, K8, K10, K18 and K23; the low-frequency drive signal of the low-frequency drive signal terminal KROW2 can drive the physical keys K5, K6, K12, K13 and K20; the low-frequency drive signal of the low-frequency drive signal terminal KROW3 can drive the physical keys K2, K1, K9, K17 and K24; the low-frequency drive signal of the low-frequency drive signal terminal KROW4 can drive the physical keys K14, K15 and K16. The low-frequency drive signal of the low-frequency drive signal terminal KCOL0 can drive the physical keys K4, K3, K13, K2 and K14; the low-frequency drive signal of the low-frequency drive signal terminal KCOL1 can drive the physical keys K11, K10, K12, K9 and K15; the low-frequency drive signal of the low-frequency drive signal terminal KCOL2 can drive the physical keys K22, K23, K5, K24 and K16; the low-frequency drive signal of the low-frequency drive signal terminal KCOL3 can drive the physical keys K19, K18, K20, and K17; the low-frequency drive signal of the low-frequency drive signal terminal KCOL4 can drive the physical keys K7, K8, K6, and K1.

[0062] (2) In each group of key circuits, at least one first inductor is arranged in a low-frequency path of a low-frequency driving signal end driving each physical key.

[0063] Specifically, in the button circuit, corresponding first inductors may be connected to the low-frequency driving signal terminals, and each physical button is connected to a corresponding first inductor.

[0064] For example Figure 4 and Figure 5 As shown, in the key circuit, five inductors L108, L116, L123, L127 and L133 are added to the input of each low-frequency drive signal terminal KROW0 to KROW4; the first inductors connected to each physical key K1 to K24 are: inductors L126, L124, L110, L105, L121, L118, L104, L114, L128, L111, L101, L120, L119, L130, L131, L132, L125, L113, L103, L122, L136, L102, L112 and L129.

[0065] (3) Determine the high-frequency path formed by multiple physical keys, including: inner circle path: composed of physical keys K3, K8, K10, K15, K18, K19, K14, K11 and K7; outer circle path: composed of physical keys K2, K1, K9, K16, K17, K24, K23, K22, K21, K20, K13, K12, K6, K5 and K4.

[0066] (4) In this embodiment, high-frequency antenna signal terminals NFC_3 and NFC_0 are set as high-frequency signal input and output terminals for transmitting and receiving high-frequency antenna signals. The high-frequency signal input and output terminals NFC_0 and NFC_3 are connected to the first capacitors C102 and C110 respectively, and the high-frequency antenna signal terminal is connected to a high-frequency path formed by a plurality of physical buttons. In this embodiment, the high-frequency path specifically includes an outer circle path and an inner circle path, wherein:

[0067] (41) When setting the connection between the high-frequency antenna signal end and the physical keys K2, K1, K9, K16, K17, K24, K23, K22, K21, K20, K13, K12, K6, K5 and K4 in the outer ring path, for the physical keys included in the outer ring path, the physical keys that are not connected in the existing circuit where the physical keys are located are connected through the second capacitor, which can effectively prevent low-frequency signals and pass high-frequency signals. Specifically:

[0068] In the existing circuit of physical keys, physical keys K2, K1, and K9 are already connected and can be directly reused; capacitor C114 needs to be set between physical keys K9 and K16; capacitor C111 needs to be set between physical keys K16 and K17; physical keys K17 and K24 are already connected and can be directly reused; capacitors C108, C106, C101, and C107 need to be set between physical keys K24 and K23, K23 and K22, K22 and K21, and K21 and K20, respectively; physical keys K20, K13, K12, K6, and K5 are already connected and can be directly reused; physical keys K5 and K4 need to be connected by capacitor C105.

[0069] Among them, in order to realize the connection between the power button K21 in the outer circle path and the two adjacent physical buttons K22 and K20, the two physical buttons K22 and K20 can be connected to the specific end (PWR_NFC) of the near-field communication antenna through the fourth capacitor, namely, capacitors C101 and C107, and the power button K21 is also connected to the specific end (PWR_NFC) of the near-field communication antenna, thereby realizing the connection between the power button K21 and the two adjacent physical buttons K22 and K20.

[0070] (42) When setting the connection between the high-frequency antenna signal end and the physical keys K3, K8, K10, K15, K18, K19, K14, K11 and K7 in the inner circle path, for the physical keys included in the inner circle path, the physical keys that are not connected in the existing circuit where the physical keys are located are connected through the second capacitor, which can effectively prevent low-frequency signals and pass high-frequency signals. Specifically:

[0071] The physical keys K3, K8, and K10 are already connected and can be directly reused; capacitors C109, C113, C103, C115, and C112 need to be set between the physical keys K10 and K15, K15 and K18, K18 and K19, K19 and K14, and K14 and K11 respectively; the physical keys K14, K11, and K7 are already connected and can be directly reused.

[0072] (5) In this embodiment, since the two high-frequency paths share a high-frequency antenna signal terminal for inputting the high-frequency antenna signal, a third capacitor needs to be provided to connect the two paths, specifically:

[0073] A capacitor C104 is provided between the physical key K4 in the outer circle path and the physical key K3 in the inner circle path.

[0074] (6) For the other physical keys in the two high-frequency paths except the physical keys connected to the third capacitor, it is necessary to block the physical keys connected between the two high-frequency paths in the existing circuit. Specifically:

[0075] It is necessary to add isolation inductors L115 and L117 between the physical key K23 and the physical keys K18, K10, K8, and K3; it is necessary to add isolation inductors L107 and L109 between the physical key K22 and the physical keys K19, K11, and K7; it is necessary to add isolation inductor L106 between the physical key K4 and the physical keys K19, K11, and K7; isolation inductors L134 and L135 are set in pairs between the physical keys K14, K15, and K16.

[0076] In addition, five inductors L108, L116, L123, L127 and L133 need to be added to the input of each low-frequency drive signal terminal KROW0 to KROW4 for blocking.

[0077] It should be noted that in this embodiment, when deploying a near-field communication antenna in an electronic device, it is necessary to add routing on the circuit board where the internal circuit of the electronic device is located, specifically, to add routing of the high-frequency antenna signal end and the inductor and capacitor filtering network. Some routings are directly added to the surface of the circuit board, while some routings need to be added to the inner layer of the circuit board in order to avoid other routings on the surface of the circuit board, so that the inner layer of the circuit board and the surface of the circuit board are connected.

[0078] For example Figure 4 As described above, the two trace ends 140 on the circuit board need to be directly connected, but if a directly connected trace is added directly on the surface of the circuit board, it will affect the capacitor C104, and a trace connecting the two trace ends 140 needs to be added on the inner layer of the circuit board.

[0079] An embodiment of the present invention also provides an electronic device, in which multiple physical buttons and a near-field communication antenna system are deployed. The near-field communication antenna system is formed by reusing the circuits where multiple physical buttons are located according to the above-mentioned near-field communication antenna setting method, which will not be described in detail here.

[0080] The embodiment of the present invention also provides a near field communication antenna setting device, the logical structure diagram of which is as follows: Figure 7 As shown, including:

[0081] The circuit determination unit 30 is used to determine a plurality of key circuit groups included in the electronic device, each key circuit group including a physical key connected to the low-frequency driving signal terminal.

[0082] The low-frequency setting unit 31 is used to set at least one first inductor in the low-frequency path of each physical key driven by the low-frequency driving signal end in each group of key circuits determined by the circuit determination unit 30.

[0083] The path determination unit 32 is used to determine a high-frequency path formed by a plurality of physical keys.

[0084] The path determination unit 32 is specifically configured to determine at least one high-frequency path formed by the multiple physical keys according to the positions where the multiple physical keys are deployed in the electronic device. Specifically:

[0085] On the one hand, the high-frequency path includes an inner circle path, the inner circle path includes a first physical key deployed in the inner circle of the electronic device, and the first physical key is connected in sequence according to the position deployed in the inner circle of the electronic device. On the other hand, the high-frequency path includes an outer circle path, the outer circle path includes a second physical key deployed in the outer circle of the electronic device, and the second physical key is connected in sequence according to the position deployed in the outer circle of the electronic device.

[0086] The antenna setting unit 33 is used to set at least one high-frequency antenna signal terminal to be connected to one of the low-frequency drive signal terminals through a corresponding first capacitor, and to set the high-frequency antenna signal terminal to be connected to the high-frequency path determined by the path determination unit 32, wherein the physical keys not connected in the key circuit in the same high-frequency path are connected by a second capacitor, and the physical keys connected in the key circuit between different high-frequency paths are connected by a second inductor.

[0087] In one case, when the antenna setting unit 33 sets the high-frequency antenna signal end to be connected to the high-frequency path, it is specifically used to set a plurality of high-frequency antenna signal ends, and each high-frequency antenna signal end is correspondingly connected to a high-frequency path.

[0088] In another case, when the antenna setting unit 33 sets the high-frequency antenna signal end to be connected to the high-frequency path, it is specifically used to set a high-frequency antenna signal end, and the high-frequency antenna signal end is connected to one of the multiple high-frequency paths, and two adjacent high-frequency paths among the multiple high-frequency paths are connected through a third capacitor.

[0089] Furthermore, the physical buttons include a power button, and the high-frequency path includes the power button, and the antenna setting unit 33 is also connected between the power button and the ground wire through a third inductor.

[0090] The antenna setting unit 33 also connects the physical buttons adjacent to the power button in the high-frequency path to the specific end of the near-field communication antenna through the fourth capacitor; the power button is connected to the specific end of the near-field communication antenna.

[0091] It can be seen that when the near-field communication antenna setting device of this embodiment is used to set the near-field communication antenna in an electronic device equipped with multiple physical buttons, at least one high-frequency antenna signal end is directly set to the circuit where the physical button is located, and there is no need to deploy the near-field communication antenna in a separate space, which saves space for near-field communication implementation. By taking advantage of the characteristics that capacitors block low-frequency signals and pass high-frequency signals, and inductors block high-frequency signals and pass low-frequency signals, a first capacitor, a second capacitor, a first inductor, and a second inductor are set in the button circuit of the electronic device, so that the use of the physical buttons and the use of the near-field communication antenna are independent of each other and do not interfere with each other.

[0092] A person skilled in the art may understand that all or part of the steps in the various methods of the above embodiments may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which may include: a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, etc.

[0093] The above is a detailed introduction to the near-field communication antenna setting method, device and electronic device provided in the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for general technicians in this field, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A method for setting a near field communication antenna, characterized in that: include: Determine a plurality of key circuits included in the electronic device, each key circuit comprising a physical key connected to a low-frequency drive signal terminal and a circuit connection portion of the physical key deployed in an internal circuit system of the electronic device; In each group of the key circuits, at least one first inductor is arranged in the low-frequency path of each physical key driven by the low-frequency driving signal end; wherein the low-frequency path refers to a path connecting the low-frequency signal corresponding to the circuit where the physical key is located; Determine a high-frequency path formed by the plurality of physical buttons; wherein the high-frequency path refers to a path connected to a high-frequency antenna signal, and the high-frequency antenna signal refers to a high-frequency signal required for connecting the path for driving a near-field communication antenna; At least one high-frequency antenna signal terminal is connected to one of the low-frequency drive signal terminals through a corresponding first capacitor, and the high-frequency antenna signal terminal is connected to the high-frequency path, wherein the physical keys that are not connected in the key circuit in the same high-frequency path are connected by a second capacitor, and the physical keys that are connected in the key circuit between different high-frequency paths are connected by a second inductor; The step of determining a high-frequency path formed by a plurality of physical keys specifically includes: Determining at least one high-frequency path formed by the plurality of physical keys according to positions where the plurality of physical keys are deployed in the electronic device; The high-frequency path includes an inner circle path, the inner circle path includes first physical keys arranged in the inner circle of the electronic device, and the first physical keys are connected in sequence according to the positions arranged in the inner circle of the electronic device; The high-frequency path includes an outer ring path, and the outer ring path includes second physical keys deployed in the outer ring of the electronic device. The second physical keys are connected in sequence according to the positions deployed in the outer ring of the electronic device.

2. The method according to claim 1, characterized in that The step of setting the high-frequency antenna signal end to be connected to the high-frequency path specifically includes: A plurality of high-frequency antenna signal terminals are provided, and each high-frequency antenna signal terminal is correspondingly connected to a high-frequency path.

3. The method according to claim 1, characterized in that The step of setting the high-frequency antenna signal end to be connected to the high-frequency path specifically includes: A high-frequency antenna signal terminal is provided, and the high-frequency antenna signal terminal is connected to one of the multiple high-frequency paths, and two adjacent high-frequency paths among the multiple high-frequency paths are connected via a third capacitor.

4. The method according to claim 1, characterized in that The physical button includes a power button, and the high-frequency path includes the power button, and further includes: The power button and the ground wire are connected via a third inductor.

5. The method according to claim 4, characterized in that Also includes: The physical buttons adjacent to the power button in the high-frequency path are respectively connected to specific ends of the near-field communication antenna through fourth capacitors; the power button is connected to the specific ends, wherein the specific ends are used to realize the connection between the power button and two adjacent physical buttons.

6. An electronic device, characterized in that: Deploy a plurality of physical buttons and a near field communication antenna system on the electronic device; The near field communication antenna system is a near field communication antenna system formed by multiplexing the circuits where the multiple physical buttons are located according to the near field communication antenna setting method as described in any one of claims 1 to 5.

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