TWM491866U - Electronic accessory - Google Patents

Description

Electronic Accessories

This creation relates to an electronic accessory, and more particularly to an electronic accessory suitable for use in a portable electronic device.

With the advancement of the times, portable electronic devices such as smart phones and tablets have become inseparable from people's lives, and smart phones and tablets almost no longer have physical buttons, but instead of touch. Perform the operation of the portable electronic device. In general, the current portable electronic device has only one or two commonly used basic buttons, such as a power switch or a volume adjustment button, for the user to operate, and the current portable electronic device has integrated touch. The control panel displays virtual buttons for text input or other operational controls, such as taking photos or talking.

It is worth noting that the size of the portable electronic device is generally small, so that the size of the virtual button displayed by the touch panel of the portable electronic device is naturally small, and it is easy to cause the user. Inconvenience in operation. As a result, a number of extended Bluetooth keyboards have appeared on the market to allow users to perform physical typing.

However, conventional Bluetooth keyboards usually require prior pairing and an additional power source (such as a built-in battery). In an environment where the Bluetooth keyboard cannot be charged, if the independent power supply of the Bluetooth keyboard is exhausted, the user will not be able to use the Bluetooth keyboard to operate the portable electronic device, which causes inconvenience to the user.

The present creative embodiment proposes an electronic accessory. The electronic component is suitable for a portable electronic device, and includes a near field communication module, a processing module, a first antenna, a second antenna, an input module, and a voltage adjustment module. The processing module is electrically connected to the near field communication (NFC) module and the input module, and the voltage adjustment module is electrically connected to the first antenna, the processing module and the near field communication module, and the second antenna Electrically connected to the near field communication module. The first antenna is configured to receive the first electromagnetic signal transmitted by the portable electronic device, and generate an inductive power source accordingly. The voltage regulation module is configured to receive the inductive power supply, and accordingly generate the working power required by the processing module, the near field communication module, and the input module. The input module is for the user to operate to generate a corresponding operation signal to the processing module. After processing the operation signal, the processing module transmits the processed operation signal to the near field communication module, and the near field communication module transmits the processed operation signal to the portable electronic device through the second antenna, This allows the user to operate the portable electronic device through the electronic accessory.

The present creative embodiment also provides another electronic accessory. The electronic accessory is suitable for a portable electronic device and includes a cover body, a base and a support portion. The first antenna and the second antenna are disposed inside the cover body, and the front surface of the cover body defines an accommodating space, wherein the accommodating space is used for accommodating the portable electronic device. One side of the base is pivotally connected to one side of the cover body, and one side of the base is provided with an input module. The support portion is pivotally connected to the back of the cover. A near field communication module, a voltage regulation module and a processing module are disposed in the cover or the base, the processing module is electrically connected to the near field communication module and the input module, and the voltage adjustment module is electrically connected to the first antenna The processing module and the near field communication module, and the second antenna is electrically connected to the near field communication module.

The present creative embodiment also provides yet another electronic accessory. The electronic accessory is suitable for a portable electronic device and includes a housing. An input module is disposed on a lower portion of the front surface of the housing, and an upper portion of the front surface of the housing defines an accommodation space, wherein the first antenna and the second antenna are disposed on an inner surface of the housing, and the housing The inner surface is located in the accommodating space, and the accommodating space is used for accommodating the portable electronic device. A near field communication module, a voltage adjustment module and a processing module are disposed within the housing. Processing module electrically connected to near field communication mode The group and the input module, the voltage adjustment module is electrically connected to the first antenna, the processing module and the near field communication module, and the second antenna is electrically connected to the near field communication module.

In summary, after the electronic component proposed by the present embodiment receives the first electromagnetic signal transmitted by the portable electronic device via the first antenna, the input module, the processing module, and the near field communication mode can be correspondingly generated. The required working power of the group can be operated without additional built-in battery. In other words, the user can still operate the portable electronic device through the electronic accessory in an environment that cannot be charged, thereby increasing the convenience of the user operating the portable electronic device.

In order to further understand the features and technical contents of this creation, please refer to the following detailed description and drawings of this creation, but these descriptions and drawings are only used to illustrate this creation, not the right to this creation. The scope is subject to any restrictions.

10, 30‧‧‧ Electronic accessories

20‧‧‧Portable electronic devices

11‧‧‧ Cover

12‧‧‧Base

13‧‧‧Fixed parts

31‧‧‧Shell

110, 310‧‧‧ accommodating space

111, 311‧‧‧ perforation

112‧‧‧Snap Department

113‧‧‧Slip mat

114‧‧‧first antenna

115‧‧‧second antenna

120‧‧‧Input module

121‧‧‧Processing module

122‧‧‧ Near Field Communication Module

123‧‧‧Voltage adjustment module

E1‧‧‧first electromagnetic signal

E2‧‧‧second electromagnetic signal

P‧‧‧Induction power supply

P1‧‧‧First working power supply

P2‧‧‧Second working power supply

P3‧‧‧ third working power supply

S1‧‧‧ operation signal

S2‧‧‧ processed signal

S3‧‧‧ Near Field Communication Signal

1A is a schematic view of an electronic accessory of the present embodiment.

FIG. 1B is a schematic diagram of an electronic component and a portable electronic device according to an embodiment of the present invention.

2 is a block diagram of an electronic accessory according to an embodiment of the present invention.

3A is a schematic view of an electronic accessory of another embodiment of the present invention.

FIG. 3B is a schematic diagram of an electronic component and a portable electronic device according to another embodiment of the present invention.

Various illustrative embodiments are described more fully hereinafter with reference to the accompanying drawings. However, the inventive concept may be embodied in many different forms and should not be construed as being limited to the illustrative embodiments set forth herein. Rather, these exemplary embodiments are provided so that this description will be thorough and complete, and the scope of the inventive concept will be fully conveyed to those skilled in the art. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity. Similar number Always indicate similar components.

It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, such elements are not limited by the terms. These terms are used to distinguish one element from another. Thus, a first element discussed below could be termed a second element without departing from the teachings of the inventive concept. As used herein, the term "and/or" includes any of the associated listed items and all combinations of one or more.

The present invention provides an electronic accessory, which can receive a first electromagnetic signal transmitted by the portable electronic device via its first antenna, convert the first electromagnetic signal into an inductive power source, and inductive power supply. It is transmitted to the voltage regulating module to generate the working power required by the processing module, the near field communication module and the input module of the electronic accessory. After the input module obtains the required working power, the user can operate the input module to generate a corresponding operation signal, and then the operation signal processed by the processing module can pass through the near field communication module and the second antenna. It is transmitted to the portable electronic device. Therefore, the user can operate the portable electronic device through the electronic accessory.

[Embodiment of Electronic Accessories]

Please refer to FIG. 1A and FIG. 1B simultaneously. FIG. 1A is a schematic diagram of an electronic component according to an embodiment of the present invention. FIG. 1B is a schematic diagram of an electronic component and a portable electronic device according to an embodiment of the present invention. In this embodiment, the electronic accessory 10 can be an extended keyboard, but the creation does not limit the type of the electronic accessory 10. The electronic component 10 includes a cover 11 , a base 12 , and a support frame 13 . One side of the cover 11 is pivotally connected to one side of the base 12 , and one side of the support frame 13 is pivotally connected to a back of the cover 11 . .

The cover 11 is rotatable relative to the base 12 to change the angle with the base 12 to achieve the function of opening. A front side of the cover 11 can accommodate a portable electronic device 20. In this embodiment, the front surface of the cover 11 defines an accommodation space 110, and the cover 11 has a through hole 111 and a buckle portion 112. The accommodating space 110 is used for accommodating the portable electronic device 20 . The through hole 111 is a rear camera lens that exposes the portable electronic device 20. The latching portion 112 is formed on the edge of the cover and is bent inwardly to securely latch the portable electronic device 20 in the accommodating space 110. In this embodiment, portable The electronic device 20 can be a smart phone, a tablet computer or an e-book with Near Field Communication (NFC) function, but the present embodiment is not limited thereto.

It is worth mentioning that the slidable pad 113 can be further disposed in the accommodating space 110 to provide a better anti-slip effect when the portable electronic device 20 having a smaller size is placed on the surface of the accommodating space 110. The portable electronic device 20 is not required to be buckled by the latching portion 112.

One side of the base 12 is provided with an input module 120 for the user to perform text input or other operational functions, such as video game character operations or general data selection and setting. The input module 120 can be a keyboard module having a plurality of buttons. However, the present invention is not limited thereto. The input module 120 can also be an input device with a lower operating current (for example, less than 1 milliamperes). The support frame 13 is rotatable relative to the back surface of the base 12 for supporting the cover body 11.

In this embodiment, when the user places the portable electronic device 20 in the accommodating space 110, the user can operate the input module 120 to perform text input or other operation functions of the portable electronic device 20. There is no need to insert a battery inside the electronic component 10, and the pairing between the electronic component 10 and the portable electronic device 20 is not required in advance.

In detail, please refer to FIG. 1A, FIG. 1B and FIG. 2 simultaneously. FIG. 2 is a block diagram of the electronic accessory according to the embodiment of the present invention. The electronic component 10 further includes a first antenna 114, a second antenna 115, a processing module 121, a near field communication module 122, and a voltage adjustment module 123. The processing module 121 is electrically connected to the near field communication module 122, the voltage adjustment module 123, and the input module 120. The near field communication module 122 is electrically connected to the second antenna 115 and the voltage adjustment module 123. The voltage adjustment module 123 is electrically connected to the first antenna 114.

In this embodiment, the electronic component 10 receives the first electromagnetic signal E1 transmitted by the portable electronic device 20 via the first antenna 115 to generate a processing module 121 and a near field communication module through the voltage adjustment module 123. The working power required by the group 122 and the input module 120 (that is, the first to third working power sources P1 to P3), after which the user can pass through The input module 120 of the electronic component 10 operates the portable electronic device 20.

The base 12 is disposed with the front side of the input module 120 opposite to the front surface of the cover 11 . Therefore, when the cover 11 is opened corresponding to the base 12 and the portable electronic device 20 is placed in the accommodating space 110 , the user will The input module 120 is operable to generate a corresponding operational signal S1, wherein the operational signal S1 can be an encoded signal.

The processing module 121 is disposed inside the cover 11 or the base 12, and the processing module 121 is a microcontroller for receiving the operation signal S1 from the input module 120 for processing. The processed operation signal S2, wherein the processed operation signal S2 can be a decoded signal. In this embodiment, the processing module 121 uses the MSP430FR5739 developed by Texas Instruments (TI), and its operating voltage is 3.3V and the operating current is 81.4μA. However, the present embodiment does not limit the possible aspect of the processing module 121. And its location.

The near field communication module 122 is disposed inside the cover 11 or the base 12, and the near field communication module 122 can be an NFC module for receiving the operation signal S2 processed by the processing module 121 to correspond to A near field communication signal S3 is generated. In this embodiment, the near field communication module 122 uses the RF430CL330H developed by Texas Instruments, and its working voltage is 3.3V and the operating current is 450μA, wherein the near field communication module 122 and the processing module 121 need to perform data transmission. The operating current is 250 μA, and the operating current required for the near field communication signal S3 for wireless transmission is 200 μA, and the operating current of the near field communication module 122 is the sum of the two, but the present embodiment does not limit the near field. Possible aspects of the communication module 122 and their setting positions.

In this embodiment, the first antenna 114 and the second antenna 115 are respectively coiled wires formed by winding metal wires, both of which are buried inside the cover 11 , and the first antenna 114 surrounds the second antenna. 115, the first antenna 114 and the second antenna 115 are formed in a concentric arrangement. Please note that the type and relative arrangement of the first antenna 114 and the second antenna 115 are not intended to limit the present creation.

In this embodiment, the first antenna 114 is configured to receive the first electromagnetic signal E1 transmitted by the portable electronic device 20 and correspondingly generate the inductive power source P, and the second antenna. 115 is configured to receive the near field communication signal S3 to excite the second electromagnetic signal E2 to be received by the portable electronic device 20.

The voltage regulating module 123 is disposed inside the cover 11 or the base 12, and the voltage regulating module 123 is a low dropout regulator (LDO) for receiving the inductive power P to generate corresponding The first working power P1 and the second working power P2, wherein the first working power P1 and the second working power P2 are working power supplies required for the processing module 121 and the near field communication module 122 to operate respectively. In addition, after receiving the second working power P2, the processing module 121 can provide the third working power P3 to the input module 120 through its universal input/output port. In the present embodiment, the voltage adjustment module 123 uses the TPS70933 developed by Texas Instruments, but the present embodiment does not limit the possible aspects of the voltage regulation module 123 and its setting position.

It is worth mentioning that the electronic component 10 further includes a first circuit substrate (not shown) and a soft bus bar (not shown). The first circuit substrate can be a printed circuit board (PCB), a flexible printed circuit board (FPC) or a circuit board of other materials, and the first antenna 114 is disposed on the second day. Line 115, processing module 121, near field communication module 122, and voltage regulation module 123. The flexible bus bar is electrically connected to the input module 120 and the processing module 121.

However, the electronic component may have a second circuit substrate (not shown), and only the first antenna 114 and the second antenna 115 are disposed on the first circuit substrate, and the processing module 121, The near field communication module 122 and the voltage adjustment module 123 can be disposed on the second circuit substrate, that is, the creation does not limit the first antenna 114, the second antenna 115, the processing module 121, and the near field communication. The module 122 and the voltage adjustment module 123 are disposed on a single circuit substrate or respectively disposed on a plurality of circuit substrates. In addition, the input module 120 is electrically connected to the processing module 121 through a flexible bus bar (not shown), and the first antenna 114 and the second antenna 115 are respectively electrically transmitted through a flexible bus bar (not shown). The voltage regulation module 123 and the near field communication module 122 are connected. It is worth mentioning that the second circuit substrate can be a printed circuit board, a flexible printed circuit board or a circuit board of other materials.

In this embodiment, before the portable electronic device 20 is placed inside the accommodating space 110, the user must first activate the near field communication function of the portable electronic device 20 to excite the first electromagnetic signal E1. After the user places the portable electronic device 20 inside the accommodating space 110, the first antenna 114 generates the inductive power source P after receiving the first electromagnetic signal E1 according to the principle of electromagnetic induction.

After the first antenna 114 receives the first electromagnetic signal E1 and generates the inductive power P, the voltage adjustment module 123 receives the inductive power P and correspondingly generates the first working power P1 to the processing module 121 and the second working power P2 to the processing mode. The group 121 and the near field communication module 122, the input module 120 passes through the processing module 121 to obtain a required working power, for example, a third working power source P3, whereby the electronic component 10 can be configured without additional batteries. It is to be noted that, in this embodiment, the input module 120 can be further electrically connected to the voltage regulating module 123 to obtain the required working power directly from the voltage regulating module 123.

Next, when the user presses the button on the input module 120, the input module 120 correspondingly transmits the operation signal S1 to the processing module 121, and causes the processing module 121 to generate the processed operation signal S2 to the near field communication module. 122. Then, the near field communication module 122 transmits the operation signal S3 to the second antenna 115, and the second antenna 115 converts the operation signal S3 into the second electromagnetic wave signal E2 and transmits it to the portable electronic device 20 to complete the portable type. Text input or other operational functions of the electronic device 20. Further, the near field communication module 122 first performs processing such as modulation of the processed operation signal S2 to generate a near field communication signal S3 to the second antenna 115, so that the second antenna 115 is excited. The second electromagnetic wave signal E2 is described.

It can be seen from the above that the electronic component 10 proposed in the present embodiment does not need to be connected to the portable electronic device in advance by providing the near field communication module 122 and the second antenna 115 disposed therein. The pairing 20 can perform wireless signal transmission with the portable electronic device 20.

In addition, it is worth noting that since the processing module 121 and the near field communication module 122 inside the electronic component 10 both use a low power consumption IC, as described above, the processing mode The operating voltages of the group 121 and the near field communication module 122 are both 3.3V, and the operating currents of the processing module 121 and the near field communication module 122 are 81.4μA and 450μA, respectively, so the operating voltage of the entire electronic component 10 is 3.3V. The operating current of the electronic component 10 is only 531.4 uA, that is, the operating current required by the electronic component 10 proposed in the present embodiment is less than 1 mA. That is, since the electronic accessory 10 proposed in the present embodiment is a low-power extended keyboard, the electronic component 10 does not need to be additionally configured with a battery, and only needs to be received by the first antenna 114 by the portable electronic device. The first electromagnetic signal E1 excited by 20 can generate the working power required for each component in the electronic component 10. Compared with the conventional Bluetooth keyboard, the electronic accessory 10 proposed in the present embodiment does not need to be paired in advance, and does not need to be additionally provided with a battery, which is convenient in use and can achieve energy saving effect.

[Another embodiment of an electronic component]

Please refer to FIG. 3A and FIG. 3B simultaneously. FIG. 3A is a schematic diagram of an electronic component according to another embodiment of the present invention. FIG. 3B is a schematic diagram of an electronic component and a portable electronic device according to another embodiment of the present invention. In the embodiment, the electronic accessory 30 can be a keyboard protective case, but the creation does not limit the type of the electronic accessory 30. The electronic component 30 includes a housing 31 having an upper portion of the front surface defining an accommodation space 310 and an upper portion of the front surface of the front surface having an input module 120. The accommodating space 310 is used for accommodating the portable electronic device 20 . In addition, the housing 31 has a through hole 311 that exposes a front camera lens of the portable electronic device 20.

In this embodiment, the electronic component 30 also includes a first antenna 114, a second antenna 115, a processing module 121, a near field communication module 122, and a voltage adjustment module 123, and with respect to the first antenna 114, The electrical connection relationship between the second antenna 115, the input module 120, the processing module 121, the near field communication module 122, and the voltage regulation module 123 is also as described in the embodiment of FIG. This embodiment is not described here. It is to be noted that the first antenna 114 and the second antenna 115 are disposed on an inner surface of the housing 31, and the inner surface is located in the accommodating space 310, and the processing module 121 and the near field communication module are Both the 122 and the voltage regulation module 123 are disposed inside the casing 31.

It is worth mentioning that the electronic component 30 further includes a circuit substrate (not shown) and a soft bus bar. In this embodiment, the circuit board is disposed in the housing 31, and is provided with a first antenna 114, a second antenna 115, a processing module 121, a near field communication module 122, and a voltage adjustment module 123. The input module 120 is electrically connected to the processing module 121 through the flexible bus bar. However, the input module 120 can be electrically connected to the voltage adjustment module 123 through the flexible bus bar to obtain the required working power directly from the voltage adjustment module 123 without passing through the processing module 121. To get the power you need.

When the user places the portable electronic device 30 in the accommodating space 310, the user can operate the input module 320 to perform text input or other operation functions without inserting a battery inside the electronic component 30. And the pairing between the electronic accessory 30 and the portable electronic device 20 is not required in advance.

[Effects of possible examples]

In summary, the electronic component proposed by the present embodiment can receive the first electromagnetic signal transmitted by the portable electronic device via the first antenna, and then generate and adjust the first electromagnetic signal by using the voltage adjustment module. The working power required for the input module, the processing module and the near field communication module enables the electronic component to operate without additional battery loading. After the processing module and the near field communication module obtain the required working power, the user can operate the electronic accessory proposed in the present embodiment to perform near field wireless communication with the portable electronic device without prior matching. . In other words, the user only needs to place the portable electronic device in the accommodating space of the electronic component, and the portable electronic device can be operated directly through the electronic component. In addition, even in an environment where charging is impossible, since the electronic component does not need to use a battery, the user can operate the portable electronic device through the electronic accessory.

However, the drawings and descriptions disclosed above are only examples of the present invention, but they are not intended to limit the creation. Anyone skilled in the art can make various changes and retouches according to the above description, that is, Dafanyi The simple equivalent changes and modifications made by the scope of this patent application and the content of the creative description are still covered by this creation patent. Within the scope.

10‧‧‧Electronic accessories

114‧‧‧first antenna

115‧‧‧second antenna

120‧‧‧Input module

121‧‧‧Processing module

122‧‧‧ Near Field Communication Module

123‧‧‧Voltage adjustment module

E1‧‧‧first electromagnetic signal

E2‧‧‧second electromagnetic signal

P‧‧‧Induction power supply

P1‧‧‧First working power supply

P2‧‧‧Second working power supply

P3‧‧‧ third working power supply

S1‧‧‧ operation signal

S2‧‧‧ processed signal

S3‧‧‧ Near Field Communication Signal

Claims (15)

An electronic component, which is suitable for a portable electronic device, the electronic component includes: a near field communication module; a processing module electrically connected to the near field communication module; and a first antenna for receiving the a first electromagnetic signal transmitted by the portable electronic device, and correspondingly generating an inductive power supply; an input module electrically connected to the processing module; a voltage regulating module electrically connected to the first antenna, the processing The module and the near field communication module are configured to receive the inductive power supply, and generate the processing module, the near field communication module and the working power required by the input module; and a second antenna, electrical Connecting the near field communication module; wherein the input module is configured to be operated by a user to generate a corresponding operation signal to the processing module, and the processing module processes the operation signal and then processes the The operation signal is transmitted to the near field communication module, and the near field communication module transmits the processed operation signal to the portable electronic device through the second antenna, thereby allowing the user to transmit the Electronic accessories to operate the portable battery Device. The electronic accessory of claim 1, wherein the near field communication module converts the processed operation signal into a near field communication signal, and the second antenna receives the near field communication signal, thereby exciting a first The electromagnetic signal is received by the portable electronic device. The electronic accessory of claim 1, wherein the operation signal is an encoded signal, and the processing module performs decoding processing on the encoded signal to generate a decoded signal. The electronic accessory of claim 1, further comprising a cover body, a base and a support portion, wherein the first antenna and the second antenna are disposed in the cover body, and the base One side of the cover is pivotally connected to a side of the cover, and the support is pivotally connected to a back of the cover. A front surface of the cover defines an accommodating space for accommodating the portable An electronic device, and the input module is disposed on one side of the base, wherein the surface of the base is opposite to the front surface of the cover. The electronic component of claim 4, wherein the first antenna and the second antenna are respectively a first coil antenna and a second coil antenna, and the first coil antenna surrounds the second coil antenna. The electronic component of claim 4, further comprising a first circuit substrate, the first antenna and the second antenna are disposed on the first circuit substrate, and the first circuit substrate is disposed on the cover within. The electronic component of claim 6, further comprising a flexible bus bar, the near field communication module, the processing module and the voltage adjustment module are disposed on the first circuit substrate, and the input module The processing module is electrically connected through the flexible bus bar. The electronic component of claim 6, further comprising a second circuit substrate and a flexible bus bar, the second circuit substrate being disposed in the base, and the near field communication module, the processing module, and the The voltage adjustment module is disposed on the second circuit substrate, the first antenna is electrically connected to the voltage adjustment module through the flexible bus bar, and the second antenna is electrically connected to the second bus through the flexible bus bar Near field communication module. The electronic component of claim 1, further comprising a casing disposed in a lower half of a front surface of the casing, wherein an upper portion of the front surface of the casing defines an accommodation space The first antenna and the second antenna are disposed on an inner surface of the housing, the inner surface of the housing is located in the accommodating space, and the accommodating space is used for accommodating the portable Electronic device. The electronic component of claim 9, further comprising a first circuit substrate, the first antenna and the second antenna are disposed on the first circuit substrate, and the first circuit substrate is disposed on the housing within. The electronic component of claim 10, further comprising a flexible bus bar, the near field communication module, the processing module and the voltage adjustment module are disposed on the first circuit substrate, and the input module The processing module is electrically connected through the flexible bus bar. The electronic accessory of claim 1 wherein the electronic component requires an operating current of less than 1 milliamperes. The electronic accessory of claim 1, wherein the input module is a keyboard module. An electronic component, which is suitable for a portable electronic device, comprising: a cover body having a first antenna and a second antenna disposed therein, and a front surface defining an accommodating space, wherein the accommodating space is used for Having the portable electronic device; a base, one side of which is pivotally connected to one side of the cover body, and one side of which is provided with an input module; and a supporting portion pivotally connected to a back surface of the cover body; A near field communication module, a voltage regulation module and a processing module are disposed in the cover or the base, and the processing module is electrically connected to the near field communication module and the input module. The voltage adjustment module is electrically connected to the first antenna, the processing module and the near field communication module, and the second antenna is electrically connected to the near field communication module. An electronic component, which is applicable to a portable electronic device, comprising: a casing, wherein a lower portion of a front surface is provided with an input module, and an upper portion of the front surface defines an accommodation space, wherein the first An antenna and a second antenna are disposed on an inner surface of the housing, the inner surface of the housing is located in the accommodating space, and the accommodating space is used for accommodating the portable electronic device; a near field communication module, a voltage regulation module and a processing module are disposed in the housing, the processing module is electrically connected to the near field communication module and the input The voltage adjustment module is electrically connected to the first antenna, the processing module and the near field communication module, and the second antenna is electrically connected to the near field communication module.