CN106953662A - A mobile terminal and a coil sharing method - Google Patents

Abstract

The present invention provides a kind of mobile terminal and coil method for sharing, NFC antenna is integrated into after metal battery by solution to be covered, it can produce vortex to influence the performance of NFC antenna in metal surface, and as cell rear cover dismounts increasing for number of times, the contact performance of contact is constantly reduced, and in turn results in the problem of NFC antenna performance is reduced.The mobile terminal of the present invention includes：The transfer voice device on Mobile terminal main board is arranged at, transfer voice device includes coil and functional circuit；NFC radio circuits；Switch, switch is according to NFC open signals, connection coil and NFC radio circuits, according to NFC shutdown signals, the functional circuit of connection coil and transfer voice device.The present invention is multiplexed to the coil of transfer voice device, it can evade being integrated into NFC antenna to cover after metal battery and produce vortex and as cell rear cover dismounts increasing for number of times, the phenomenon for causing the contact of contact to reduce, effectively increases the performance of NFC antenna.

Description

A mobile terminal and a coil sharing method

technical field

The invention relates to the technical field of antenna design, in particular to a mobile terminal and a coil sharing method.

Background technique

With the popularization of mobile phones and the strengthening of functional features, many mobile phones currently integrate NFC (Near Field Communication) functions; NFC is a non-contact identification and interconnection technology that can be used in mobile devices, consumer electronics, Near-field wireless communication between devices such as PCs and smart control tools. NFC provides a simple, touch-based information interaction solution, allowing users to exchange information, access content and services simply and intuitively.

NFC is a wireless communication technology, of course, it needs the support of the antenna to complete the relevant communication functions. Because the working frequency of NFC is 13.56MHz, the wavelength of electromagnetic waves at this frequency is very long (about 22 meters), and NFC requires a short distance for reading and writing information (about 3-5 mm), so NFC antennas usually use magnetic field coupling. The coil antenna to meet the requirements of NFC.

At the same time, because users have relatively high requirements for the appearance design of the device, the current NFC antenna is often built into the device. For example, many NFC antennas of mobile phones are attached to the battery cover or battery, and the NFC antenna is connected to the On the radio frequency link of NFC.

However, current mobile phones generally adopt a metal battery back cover design. The above-mentioned way of integrating the NFC antenna into the battery back cover will greatly affect the performance of the NFC antenna. In addition, since the NFC antenna is connected to the NFC radio frequency On the link, with the increase in the number of disassembly and assembly of the battery back cover, the contact performance of the contacts will continue to deteriorate, which will reduce the performance of the NFC antenna.

Contents of the invention

The purpose of the present invention is to provide a mobile terminal and a coil sharing method to solve the problem of integrating the NFC antenna on the metal battery back cover, which will generate eddy currents on the metal surface and thus affect the performance of the NFC antenna, and will be disassembled with the battery back cover As the number of times increases, the contact performance of the contacts decreases continuously, which in turn causes the problem that the performance of the NFC antenna decreases.

In order to achieve the above object, the present invention provides a mobile terminal, including:

The sound transmission device arranged on the main board of the mobile terminal, the sound transmission device includes a coil and a functional circuit;

NFC radio frequency circuit;

A switch, the switch connects the coil and the NFC radio frequency circuit according to the NFC open signal, and connects the coil with the functional circuit of the sound transmission device according to the NFC close signal.

In order to achieve the above purpose, an embodiment of the present invention also provides a coil sharing method, which is applied to the mobile terminal as described above, and the method includes:

When the NFC radio frequency signal is detected, judge the working status of the sound transmission device;

If the sound transmission device is in a non-working state, control the coil of the sound transmission device to communicate with the NFC radio frequency circuit.

Embodiments of the present invention have the following beneficial effects:

In the above technical solution of the embodiment of the present invention, when the switch detects the NFC open signal, it connects the coil and the NFC radio frequency circuit, and when it detects the NFC close signal, it connects the coil with the functional circuit of the sound transmission device. In the embodiment of the present invention, the coil of the sound transmission device is multiplexed, and the coil of the sound transmission device arranged on the main board of the mobile terminal is used as the NFC antenna, which can avoid the eddy current generated by the NFC antenna integrated on the metal battery back cover The increase in the number of dismounting and assembling of the cover results in a decrease in the contact performance of the contacts, thereby effectively improving the performance of the NFC antenna.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments of the present invention. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention , for those skilled in the art, other drawings can also be obtained according to these drawings without paying creative labor.

FIG. 1 is a schematic diagram of a first structure of a mobile terminal according to an embodiment of the present invention;

2 is a schematic structural diagram of a switch in a mobile terminal according to an embodiment of the present invention;

FIG. 3 is a working flowchart of a coil sharing method according to an embodiment of the present invention;

FIG. 4 is a second structural schematic diagram of a mobile terminal according to an embodiment of the present invention.

detailed description

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments of the present invention. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention , for those skilled in the art, other drawings can also be obtained according to these drawings without paying creative labor.

first embodiment

Embodiments of the present invention provide a mobile terminal, as shown in Figure 1, including:

The sound transmission device is arranged on the main board of the mobile terminal, and the sound transmission device includes a coil and a functional circuit. The sound transmission device here may specifically be a receiver or a loudspeaker. The functional circuitry of the receiver converts audio electrical signals into sound signals. The speaker may specifically be a speaker of the terminal, and the functional circuit of the speaker converts an electrical signal into an acoustic signal.

NFC radio frequency circuit for short-range wireless communication. The NFC radio frequency circuit is arranged on the main board of the mobile terminal. The NFC radio frequency circuit may specifically include an NFC functional circuit realizing NFC function and an NFC radio frequency matching circuit connected with the NFC functional circuit and composed of resistors, inductors and capacitors.

A switch, which connects the above-mentioned coil and the NFC radio frequency circuit according to the NFC open signal, and connects the above-mentioned coil and the functional circuit of the above-mentioned sound transmission device according to the NFC close signal.

In a specific embodiment of the present invention, the functional circuit of the sound transmission device shares the coil of the sound transmission device with the NFC radio frequency circuit, and when the user turns on the NFC function and the sound transmission device (receiver or speaker) is in a non-working state, the above-mentioned coil is connected And the NFC radio frequency circuit, when the user turns on the NFC function and the sound transmission device is in the working state, it reminds the user that the sound transmission device is currently in the working state.

Preferably, the above-mentioned sound transmission device is a receiver. Generally, when the NFC function is used, the terminal is in a state away from the human ear, and the receiver does not work, that is, when the NFC function is turned on, the scene where the receiver works is seldom, so , there will be no conflict when the sound transmission device and NFC share the coil.

Further, the mobile terminal in the embodiment of the present invention also includes:

A controller connected to the above-mentioned switch, the controller detects the NFC radio frequency signal, and when the above-mentioned sound transmission device is in a non-working state signal, the above-mentioned NFC start signal is output to the above-mentioned switch; the above-mentioned controller detects the above-mentioned NFC radio frequency signal. When the NFC radio frequency signal is not detected again within a predetermined time period, an NFC off signal is output to the switch.

Here, after the user turns on the NFC function, the controller will detect the NFC radio frequency signal. At the same time, the controller will detect whether the sound transmission device is in the working state. If the sound transmission device is in the non-working state at this time, it will output the NFC start signal to the switch , so that the switch is connected to the above-mentioned coil and the NFC radio frequency circuit; if the controller does not detect the NFC radio frequency signal again within the predetermined period of time when the above-mentioned NFC radio frequency signal is detected, then it is determined that the terminal has left the NFC card reader and other equipment, and an NFC shutdown signal is output A switch is provided, so that the switch is connected to the functional circuit of the above-mentioned coil and the above-mentioned sound transmission device according to the NFC closing signal.

Specifically, as shown in Figure 2, the switch includes:

a first switch S1 and a second switch S2;

The control end of the first switch S1 is connected to the first terminal A1 of the coil, the first switching end of the first switch S1 is connected to the first antenna interface B1 of the NFC radio frequency circuit, and the first A second switch end of the switch S1 is connected to the first antenna interface C1 of the functional circuit of the sound transmission device;

The control end of the second switch S2 is connected to the second terminal A2 of the coil, the first switching end of the second switch S2 is connected to the second antenna interface B2 of the NFC radio frequency circuit, and the second The second switch end of the two switches S2 is connected to the second antenna interface C2 of the functional circuit of the sound transmission device.

When the controller detects the NFC radio frequency signal, and the sound transmission device is in a non-working state signal, the NFC start signal is output to the first switch and the second switch, and the first switch is turned on according to the NFC signal. , controlling the first switch end of the first switch to be connected to the first antenna interface of the NFC radio frequency circuit, and the second switch to control the first switch end of the second switch to connect to the first antenna interface of the NFC radio frequency circuit according to the NFC start signal. The second antenna interface connection of the NFC radio frequency circuit;

When the controller detects that the NFC radio frequency signal is not detected again within a predetermined period of time, the NFC off signal is output to the first switch and the second switch, and the first switch is configured according to the Said NFC close signal, control the second switching end of said first switch to be connected with the first antenna interface of the functional circuit of said sound transmission device; According to said NFC close signal of said second switch, control said The second switch end of the second switch is connected to the second antenna interface of the functional circuit of the sound transmission device. Specifically, the first output end of the NFC radio frequency matching circuit is the first antenna interface of the NFC radio frequency circuit, and the second output end of the NFC radio frequency matching circuit is the second antenna interface of the NFC radio frequency circuit.

The embodiment of the present invention utilizes the inner coil of the sound transmission device as the NFC antenna, multiplexes the multi-turn coil inside the sound transmission device, and uses the listening hole of the receiver as the radiation direction of the NFC antenna; at the same time, due to the NFC radio frequency circuit and The sound transmission device shares the coil, which avoids the problem of NFC performance degradation caused by the removal of the battery back cover.

Further, the above-mentioned sound transmission device further includes: a first antenna shrapnel respectively connected to the first terminal of the coil and one end of the first switch, and connected to the second terminal of the coil and the second switch respectively. One end of the switch is connected to the shrapnel of the second antenna.

The first antenna shrapnel and the second antenna shrapnel here are the antenna shrapnel of the sound transmission device. Using the antenna shrapnel of the sound transmission device as the feed point of the NFC antenna can effectively prevent the NFC antenna from being damaged due to the increase in the number of disassembly and assembly of the battery cover. Performance also deteriorates.

The mobile terminal of the embodiment of the present invention utilizes the internal coil multiplexing of the sound transmission device to realize the scheme of the NFC antenna, which can avoid the deficiencies in the current design of the NFC antenna on the metal mobile phone, while improving the performance and stability of the NFC antenna, it will not cause The increase in cost will not affect the appearance.

second embodiment

As shown in FIG. 3, an embodiment of the present invention also provides a coil sharing method, which is applied to the mobile terminal as described above, and the method includes:

Step 301: When an NFC radio frequency signal is detected, determine the working state of the sound transmission device.

Specifically, after the user turns on the NFC function, the mobile terminal can detect the NFC radio frequency signal. Here, by judging the working state of the sound transmission device, it is determined whether the coil of the sound transmission device is connected to the NFC radio frequency circuit or connected to the functional circuit of the sound transmission device, thereby preventing conflicts when the sound transmission device and NFC share the coil.

Step 302: If the sound transmission device is in a non-working state, control the coil of the sound transmission device to communicate with the NFC radio frequency circuit.

When the sound transmission device is in a non-working state, the NFC start signal is output to the switch, so that the switch controls the coil of the sound transmission device to communicate with the NFC radio frequency circuit according to the NFC start signal, so as to realize the exchange of NFC data, otherwise the user is reminded of the sound transmission The device is currently in a working state, realizing the purpose of sharing the coil of the sound transmission device with the NFC radio frequency circuit.

It should be noted that the above-mentioned sound transmission device is a receiver. Generally, when the NFC function is used, the terminal is in a state away from the human ear, and the receiver does not work. That is, when the NFC function is turned on, there are very few scenarios where the receiver works. , so there is no conflict when the sound transmission device and the NFC share the coil.

Further, if the sound transmission device is in a non-working state, after the step of controlling the coil of the sound transmission device to communicate with the NFC radio frequency circuit, it also includes:

If the NFC radio frequency signal is not detected again within a predetermined period of time after the NFC radio frequency signal is detected, the coil of the sound transmission device is controlled to communicate with the functional circuit of the sound transmission device.

In the embodiment of the present invention, when the NFC radio frequency signal is not detected again within the predetermined period of time when the NFC radio frequency signal is detected, the NFC closing signal is output to the switch, so that the switch connects the coil and the sound transmission device according to the NFC closing signal functional circuit.

In the coil sharing method of the embodiment of the present invention, when an NFC radio frequency signal is detected, the working state of the sound transmission device is judged; if the sound transmission device is in a non-working state, the coil of the sound transmission device is controlled to communicate with the NFC radio frequency circuit, The NFC function is realized by multiplexing the multi-turn coil inside the sound transmission device, and there is no need to integrate the NFC antenna on the metal battery back cover, thus avoiding the eddy current generated by integrating the NFC antenna on the metal battery back cover and the disassembly and assembly of the battery back cover The increase in the number of times results in a decrease in the contactability of the contacts, thereby effectively improving the performance of the NFC antenna.

third embodiment

As shown in FIG. 4 , it is another structural block diagram of the mobile terminal according to the embodiment of the present invention. The mobile terminal 400 shown in FIG. 4 includes a radio frequency (Radio Frequency, RF) circuit 410, a memory 420, an input unit 430, a display unit 440, a processor 460, an audio circuit 470, a WiFi (Wireless Fidelity) module 480 and a power supply 490, the The mobile terminal also includes a sound transmission device and a switch, the sound transmission device includes a coil and a functional circuit, and the radio frequency circuit includes an NFC radio frequency circuit.

Wherein, the input unit 430 can be used for receiving number or character information input by the user, and generating signal input related to the user setting and function control of the mobile terminal 400 . Specifically, in the embodiment of the present invention, the input unit 430 may include a touch panel 431 . The touch panel 431, also referred to as a touch screen, can collect user's touch operations on or near it (such as the user's operation on the touch panel 431 using any suitable object or accessory such as a finger, a stylus), and The specified program drives the corresponding connected device. Optionally, the touch panel 431 may include two parts, a touch detection device and a touch controller. Among them, the touch detection device detects the user's touch orientation, and detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact coordinates, and sends it to the to the processor 460, and can receive and execute commands sent by the processor 460. In addition, the touch panel 431 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 431, the input unit 430 may also include other input devices 432, which may include but not limited to physical keyboards, function keys (such as volume control buttons, switch buttons, etc.), trackballs, mice, joysticks, etc. one or more of.

Wherein, the display unit 440 can be used to display information input by the user or provided to the user and various menu interfaces of the mobile terminal 400 . The display unit 440 may include a display panel 441, and optionally, the display panel 441 may be configured in the form of an LCD or an organic light-emitting diode (Organic Light-Emitting Diode, OLED).

It should be noted that the touch panel 431 can cover the display panel 441 to form a touch display screen. When the touch display screen detects a touch operation on or near it, it is sent to the processor 460 to determine the type of the touch event, and then the processor The 460 provides corresponding visual output on the touch display screen according to the type of the touch event.

The touch display screen includes an application program interface display area and a common control display area. The arrangement of the display area of the application program interface and the display area of the commonly used controls is not limited, and may be an arrangement in which the two display areas can be distinguished, such as vertical arrangement, left-right arrangement, and the like. The application program interface display area can be used to display the interface of the application program. Each interface may include at least one interface element such as an icon of an application program and/or a widget desktop control. The application program interface display area can also be an empty interface without any content. The commonly used control display area is used to display controls with a high usage rate, for example, application icons such as setting buttons, interface numbers, scroll bars, and phonebook icons.

Wherein the processor 460 is the control center of the mobile terminal 400, utilizes various interfaces and lines to connect the various parts of the whole mobile phone, runs or executes the software programs and/or modules stored in the first memory 421, and calls the software programs and/or modules stored in the second memory 421. The data in the memory 422 executes various functions of the mobile terminal 400 and processes data, so as to monitor the mobile terminal 400 as a whole. Optionally, the processor 460 may include one or more processing units.

Wherein, the switch connects the coil and the NFC radio frequency circuit according to the NFC open signal, and connects the coil with the functional circuit of the sound transmission device according to the NFC close signal.

Optionally, the above mobile terminal also includes:

The controller connected with the switch, the controller detects the NFC radio frequency signal, and when the sound transmission device is in a non-working state signal, the NFC start signal is output to the switch; the controller detects outputting the NFC off signal to the switch when the NFC radio frequency signal is not detected again within a predetermined time period of the NFC radio frequency signal.

Optionally, the switch includes:

a first switch and a second switch;

The control end of the first switch is connected to the first terminal of the coil, the first switch end of the first switch is connected to the first antenna interface of the NFC radio frequency circuit, and the first switch end is connected to the first antenna interface of the NFC radio frequency circuit. The second switching end is connected to the first antenna interface of the functional circuit of the sound transmission device;

The control end of the second switch is connected to the second terminal of the coil, the first switch end of the second switch is connected to the second antenna interface of the NFC radio frequency circuit, and the second switch end is connected to the second antenna interface of the NFC radio frequency circuit. The second switching end is connected to the second antenna interface of the functional circuit of the sound transmission device.

Optionally, the sound transmission device further includes: a first antenna shrapnel respectively connected to the first terminal of the coil and the control terminal of the first switch, and respectively connected to the second terminal of the coil and the control terminal of the first switch. The second antenna shrapnel connected to the control end of the second switch.

Optionally, the sound transmission device is a receiver.

Optionally, the NFC radio frequency circuit is arranged on the main board of the mobile terminal.

In the mobile terminal 400 of the embodiment of the present invention, when the switch detects the NFC open signal, it connects the coil and the NFC radio frequency circuit, and when it detects the NFC close signal, it connects the coil with the functional circuit of the sound transmission device. In the embodiment of the present invention, the coil of the sound transmission device is multiplexed, and the coil of the sound transmission device arranged on the main board of the mobile terminal is used as the NFC antenna, which can avoid the eddy current generated by the NFC antenna integrated on the metal battery back cover The increase in the number of dismounting and assembling of the cover results in a decrease in the contact performance of the contacts, thereby effectively improving the performance of the NFC antenna.

The mobile terminal of the present invention may be a terminal such as a mobile phone, a tablet computer, a personal digital assistant (Personal Digital Assistant, PDA), or a vehicle-mounted computer.

The mobile terminal 400 can implement various processes implemented by the mobile terminal in the foregoing embodiments, and details are not described here to avoid repetition.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the embodiments provided in this application, it should be understood that the disclosed devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: various media capable of storing program codes such as U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be realized by controlling related hardware through a computer program, and the program can be stored in a computer-readable storage medium, the program During execution, it may include the processes of the embodiments of the above-mentioned methods. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM) and the like.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (10)

1. a kind of mobile terminal, it is characterised in that including：

The transfer voice device on Mobile terminal main board is arranged at, the transfer voice device includes coil and functional circuit；

NFC radio circuits；

Switch, the switch connects the coil and the NFC radio circuits according to NFC open signals, is closed and believed according to NFC Number, connect the functional circuit of the coil and the transfer voice device.

2. mobile terminal according to claim 1, it is characterised in that also include：

The controller being connected is switched with described, the controller detects NFC radiofrequency signals, and the transfer voice device is in During the signal of off working state, the NFC open signals are exported to the switch；The controller is penetrated detecting the NFC When not detecting NFC radiofrequency signals again in the predetermined amount of time of frequency signal, the NFC shutdown signals are exported to the switch.

3. mobile terminal according to claim 1, it is characterised in that the switch includes：

First switching switch and the second switching switch；

The control end of the first switching switch is connected with the first terminal of the coil, and the first of the first switching switch cuts Change end to be connected with the first antenna interface of the NFC radio circuits, the second switch terminal and the sound of the first switching switch The first antenna interface connection of the functional circuit of sound transmission apparatus；

The control end of the second switching switch is connected with the Second terminal of the coil, and the first of the second switching switch cuts Change end to be connected with the second antennal interface of the NFC radio circuits, the second switch terminal and the sound of the second switching switch The second antennal interface connection of the functional circuit of sound transmission apparatus.

4. mobile terminal according to claim 3, it is characterised in that the transfer voice device also includes：Respectively with institute State coil the first terminal and it is described first switching switch control end connection first antenna shell fragment and respectively with the coil Second terminal and it is described second switching switch control end connection the second antenna shrapnel.

5. mobile terminal according to claim 3, it is characterised in that the NFC radio circuits include NFC function circuit and The NFC radio frequency matching circuits being connected with the NFC function circuit.

6. mobile terminal according to claim 5, it is characterised in that the first output end of the NFC radio frequency matching circuits For the first antenna interface of the NFC radio circuits, the second output end of the NFC radio frequency matching circuits is the NFC radio frequencies Second antennal interface of circuit.

7. mobile terminal according to claim 1, it is characterised in that the transfer voice device is receiver.

8. mobile terminal according to claim 1, it is characterised in that the NFC radio circuits are arranged at described mobile whole Hold on mainboard.

9. a kind of coil method for sharing, applied to the mobile terminal as described in claim any one of 1-8, it is characterised in that institute The method of stating includes：

When detecting NFC radiofrequency signals, the working condition of transfer voice device is judged；

If the transfer voice device is in off working state, the coil and NFC radio frequency electricals of the transfer voice device are controlled Road is connected.

10. coil method for sharing according to claim 9, it is characterised in that if the transfer voice device is in non-work Make state, then control after the step of coil of the transfer voice device is connected with NFC radio circuits, also include：

NFC radiofrequency signals are not detected again in the predetermined amount of time for detecting the NFC radiofrequency signals, then control the sound The coil of sound transmission apparatus is connected with the functional circuit of the transfer voice device.