CN111865346A - Mobile terminal and control method - Google Patents
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- CN111865346A CN111865346A CN201910345776.XA CN201910345776A CN111865346A CN 111865346 A CN111865346 A CN 111865346A CN 201910345776 A CN201910345776 A CN 201910345776A CN 111865346 A CN111865346 A CN 111865346A
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- 238000012545 processing Methods 0.000 claims abstract description 65
- 230000005670 electromagnetic radiation Effects 0.000 claims abstract description 46
- 230000008878 coupling Effects 0.000 claims abstract description 6
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- 238000004891 communication Methods 0.000 claims description 32
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
- H04B5/22—Capacitive coupling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3827—Portable transceivers
- H04B1/3833—Hand-held transceivers
- H04B1/3838—Arrangements for reducing RF exposure to the user, e.g. by changing the shape of the transceiver while in use
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
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Abstract
The disclosure provides a mobile terminal and a control method, and belongs to the technical field of electronics. The apparatus comprises: a processor, a coil and a SAR processing unit; the coil is connected with the SAR processing unit; the SAR processing unit is connected with the processor; the coil is a loudspeaker coil or an NFC coil; the coil is used for carrying out capacitive coupling with a human body part in an induction range, generating an induction signal and sending the induction signal to the SAR processing unit; the SAR processing unit is used for sending a control signal to the processor when receiving the induction signal; and the processor is used for reducing the electromagnetic radiation power of the mobile terminal according to the control signal when receiving the control signal. The embodiment of the disclosure provides a mobile terminal using an existing coil of the mobile terminal as an induction element of an SAR sensor, which does not need to add a metal coating separately, saves cost, saves a larger space for the mobile terminal, and improves flexibility.
Description
Technical Field
The present disclosure relates to the field of electronic technologies, and in particular, to a mobile terminal and a control method.
Background
SAR (Specific absorption rate) refers to the energy of electromagnetic radiation of a mobile terminal absorbed by a substance with unit mass in unit time, and is an important parameter for measuring the influence of the electromagnetic radiation of the mobile terminal on a human body. The lower the SAR, the less electromagnetic radiation energy the human body absorbs, and the higher the SAR, the more electromagnetic radiation energy the human body absorbs. The existing mobile terminal is provided with an SAR sensor to sense the human body part close to the mobile terminal, thereby realizing the purpose of reducing SAR.
Referring to fig. 1, the mobile terminal includes a SAR sensor 101 and a processor 102, the SAR sensor 101 includes a SAR processing unit 1011 and a metal coating 1012, the SAR processing unit 1011 is connected with the metal coating 1012, the metal coating 1012 is located on an inner side surface of the mobile terminal, and the SAR processing unit 1011 is connected with the processor 102. The metal coating 1012 is used as an inductive element of the SAR sensor 101, and is configured to perform capacitive coupling with a human body part within an inductive range to generate an inductive signal, and send the inductive signal to the SAR processing unit 1011, and when receiving the inductive signal, the SAR processing unit 1011 sends a control signal to the processor 102, where the control signal is used to instruct the processor 102 to reduce the electromagnetic radiation power of the mobile terminal, so as to reduce the SAR of the mobile terminal. However, the metal coating occupies a large space of the mobile terminal and also consumes excessive cost.
Disclosure of Invention
The present disclosure provides a mobile terminal and a control method, which can overcome the problems existing in the related art, and the technical scheme is as follows:
according to a first aspect provided by an embodiment of the present disclosure, a mobile terminal is provided, which includes: a processor, a coil and a SAR processing unit;
the coil is connected with the SAR processing unit;
the SAR processing unit is connected with the processor;
the coil is a loudspeaker coil or an NFC coil;
the coil is used for carrying out capacitive coupling with a human body part in an induction range, generating an induction signal and sending the induction signal to the SAR processing unit;
the SAR processing unit is used for sending a control signal to the processor when receiving the induction signal;
and the processor is used for reducing the electromagnetic radiation power of the mobile terminal according to the control signal when receiving the control signal.
In one possible implementation manner, the mobile terminal further includes: a decoupling circuit, the coil being connected to the decoupling circuit, the decoupling circuit being connected to the SAR processing unit;
the coil is used for sending a signal to the decoupling circuit, and the signal comprises the induction signal and a noise signal;
The decoupling circuit is used for removing the noise signal and sending the induction signal to the SAR processing unit.
In another possible implementation, the decoupling circuit is an active filter circuit, an LC filter circuit, an L-shaped filter circuit, or a pi-shaped filter circuit.
In another possible implementation, the mobile terminal further includes a housing, and the processor and the SAR processing unit are located inside the housing;
the coil is located inside the surface of the housing or on the surface of the housing.
In another possible implementation, the maximum sensing distance of the sensing range is between 5 mm and 35 mm.
In another possible implementation, the maximum sensing distance of the sensing range is 30 mm.
According to a second aspect provided by an embodiment of the present disclosure, there is provided a control method of a mobile terminal, applied to the mobile terminal of the first aspect, the method including:
the coil is capacitively coupled with a human body part in an induction range to generate an induction signal, and the induction signal is sent to the SAR processing unit;
the SAR processing unit sends a control signal to the processor when receiving the induction signal;
And when the processor receives the control signal, the electromagnetic radiation power of the mobile terminal is reduced according to the control signal.
In one possible implementation, the method further includes:
the processor sends a voice signal to the loudspeaker coil, and the loudspeaker coil plays the voice signal.
In another possible implementation, the method further includes:
the processor sends a first communication signal to the NFC coil;
when the NFC coil receives the first communication signal, a first NFC signal corresponding to the first communication signal is transmitted; alternatively, the first and second electrodes may be,
and the NFC coil receives a second NFC signal transmitted by the NFC communication equipment in the induction range and sends a second communication signal corresponding to the second NFC signal to the processor.
In another possible implementation manner, the mobile terminal further includes: a decoupling circuit, the coil being connected to the decoupling circuit, the decoupling circuit being connected to the SAR processing unit; the sending the sensing signal to the SAR processing unit includes:
the coil sends a signal to the decoupling circuit, the signal comprising the inductive signal and a noise signal;
The decoupling circuit removes the noise signal and sends the induction signal to the SAR processing unit.
The beneficial effects brought by the technical scheme provided by the embodiment of the disclosure at least comprise:
according to the mobile terminal provided by the embodiment of the disclosure, the coil is capacitively coupled with the human body part in the induction range to generate an induction signal, the induction signal is sent to the processor, and the processor reduces the electromagnetic radiation power of the mobile terminal according to the control signal, so that the SAR of the mobile terminal is reduced. The embodiment of the disclosure provides a mobile terminal using an existing coil of the mobile terminal as an induction element of an SAR sensor, which does not need to add a metal coating separately, saves cost, saves a large space for the mobile terminal, can reduce the volume of the mobile terminal or be used for configuring other electronic elements, and improves flexibility.
In the embodiment of the disclosure, the coil sends a signal to the decoupling circuit, the signal includes an induction signal and a noise signal, the decoupling circuit removes the noise signal, the induction signal is sent to the SAR processing unit, the SAR processing unit receives the induction signal, the control signal is sent to the processor, and the processor reduces the electromagnetic radiation power of the mobile terminal according to the received control signal. By arranging the decoupling circuit between the coil and the SAR processing unit, interference can be avoided, the induction signal received by the SAR processing unit is more accurate, and the human body part in the induction range can be accurately identified.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a schematic diagram illustrating a structure of a mobile terminal according to an exemplary embodiment;
FIG. 2 is a block diagram illustrating a mobile terminal according to an exemplary embodiment;
FIG. 3 is a block diagram illustrating a mobile terminal according to an exemplary embodiment;
FIG. 4 is a block diagram illustrating a mobile terminal according to an exemplary embodiment;
FIG. 5 is a block diagram illustrating a mobile terminal in accordance with an exemplary embodiment;
fig. 6 is a flowchart illustrating a control method of a mobile terminal according to an exemplary embodiment.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
Fig. 2 is a schematic structural diagram illustrating a mobile terminal according to an exemplary embodiment, where the mobile terminal may be a mobile phone, a tablet computer, or a notebook computer. As shown in fig. 2, the mobile terminal includes a processor 201, a coil 202, and a SAR processing unit 203.
The coil 202 is connected to the SAR processing unit 203, and the SAR processing unit 203 is connected to the processor 201.
The coil 202 is a winding of one or more wires, and the coil 202 has a conductive property, and may be made of metal or other conductive materials. The SAR processing unit 203 may be a chip or in other forms, and the SAR processing unit 203 can induce a human body part near the mobile terminal through the connected coil 202 and report the human body part to the processor 201.
When a human body part approaches the coil 202, a coupling capacitance is formed between the human body part and the coil 202 due to the action of the human body electric field, and a signal is generated between the human body part and the coil 202.
Therefore, when the human body part enters the induction range of the coil 202, the coil 202 and the human body part in the induction range are capacitively coupled to generate an induction signal, the induction signal is transmitted to the SAR processing unit 203, the induction signal is used for indicating that the human body part enters the induction range of the coil 202, and when the SAR processing unit 203 receives the induction signal, the control signal is transmitted to the processor 201, and the control signal is used for informing the processor 201 that the human body part enters the induction range of the coil 202. When the processor 201 receives the control signal, the electromagnetic radiation power of the mobile terminal is reduced according to the control signal, so that the SAR of the mobile terminal is small enough to meet the SAR regulations of relevant departments, and the influence of electromagnetic radiation on human bodies is reduced.
The process of generating the induction signal by the coil 202 may include: when the human body part enters the induction range of the coil 202, the coil 202 is capacitively coupled with the human body part in the induction range, the coil 202 induces the change of capacitance, when the change of the capacitance reaches a preset threshold value, an induction signal is generated, a power backoff process can be triggered based on the induction signal subsequently, and the electromagnetic radiation power of the mobile terminal is reduced.
Wherein, the induction range of the coil 202 has the maximum induction distance. For example, the maximum sensing distance of the sensing range of the coil 202 is between 5 mm and 35 mm, such as 30 mm.
The mobile terminal may further include a housing for protecting and carrying electronic components included in the mobile terminal, the processor 201 and the SAR processing unit 203 are located inside the housing, and the coil 202 is located inside a surface of the housing or on the surface of the housing, for example, the coil 202 is located at a position below the inner side of the back of the mobile terminal.
The mobile terminal further comprises an antenna unit, and the antenna unit is used for transmitting communication signals or receiving communication signals sent by other equipment through electromagnetic radiation. Because the electromagnetic radiation power refers to the energy of the electromagnetic radiation emitted by the antenna unit in unit time, and the SAR refers to the energy of the electromagnetic radiation absorbed by the substance with unit mass in unit time, the electromagnetic radiation power of the mobile terminal is reduced, the SAR of the mobile terminal can be reduced, and the influence of the electromagnetic radiation on the human body is reduced.
In one possible implementation manner, the processor 201 may preset the first power, regard the first power as the initial electromagnetic radiation power of the antenna unit, and control the antenna unit to perform electromagnetic radiation according to the first power. When the processor 201 receives the control signal, it indicates that a human body enters the induction range of the coil 202, which is equivalent to the electromagnetic radiation range of the mobile terminal, and at this time, in order to reduce the influence of the electromagnetic radiation on the human body, the first power may be reduced to the second power, and the antenna unit is controlled to perform the electromagnetic radiation according to the second power.
The second power may be a power preset by the processor 201, or may also be a power obtained by reducing the first power by the processor 201 according to a preset amplitude, or a power obtained by reducing the first power according to a preset ratio, where the preset amplitude is greater than 0, the preset ratio is greater than 0 and less than 1, and the preset amplitude and the preset ratio may be set according to a requirement.
In the embodiment of the present disclosure, the coil 202 and the SAR processing unit 203 together constitute a SAR sensor. As for the coil 202, the following two cases may be included:
in the first case: as shown in fig. 3, the mobile terminal includes a speaker, the speaker includes a speaker coil 2021, the coil 202 is the speaker coil 2021, and the processor 201 is connected to the speaker coil 2021, that is, the speaker coil 2021 is used as an inductive element of the SAR sensor.
The sensing range of the speaker coil 2021 may be determined according to the size, for example, the maximum size of the speaker coil 2021 in the horizontal direction is 15 mm, the maximum size in the vertical direction is 10 mm, and the sensor has a larger area, so that the sensor can reach a larger sensing range, and can be used as the sensing element of the SAR sensor.
When the voice signal needs to be played, the processor 201 sends the voice signal to the speaker coil 2021, and the speaker coil 2021 plays the voice signal.
For example, when a user triggers a music playing instruction on the mobile terminal, and the processor 201 receives the music playing instruction, acquires music data corresponding to the music playing instruction, samples the music data to obtain a voice signal, and sends the voice signal to the speaker coil 2021, and the speaker coil 2021 converts the voice signal into a sound signal for playing, thereby achieving the effect of playing music.
If a certain conductive substance is in direct current short circuit with the ground, the potential of the conductive substance is zero, and the conductive substance cannot be capacitively coupled with a human body part, so that the conductive substance cannot be used as an induction element of the SAR sensor. In the embodiment of the present disclosure, the speaker coil 2021 is not grounded, and the potential is not zero, and may be used as an inductive element of the SAR sensor.
In the second case: as shown in fig. 4, the mobile terminal includes an NFC (Near Field Communication) module, the NFC module includes an NFC coil 2022, the coil 202 is the NFC coil 2022, and the processor 201 is connected to the NFC coil 2022, that is, the NFC coil 2022 is used as an inductive element of the SAR sensor.
If a certain conductive substance is in direct current short circuit with the ground, the potential of the conductive substance is zero, and the conductive substance cannot be capacitively coupled with a human body part, so that the conductive substance cannot be used as an induction element of the SAR sensor. The NFC coil 2022 in the embodiment of the present disclosure is not grounded, and the potential is not zero, and may be used as an inductive element of the SAR sensor.
The NFC coil 2022 may not only act as an inductive element of the SAR sensor, but may also receive or transmit signals:
the process of transmitting the signal comprises:
the processor 201 sends a first communication signal to the NFC coil 2022, and when the NFC coil 2022 receives the first communication signal, the first communication signal is converted into a corresponding first NFC signal, and the first NFC signal corresponding to the first communication signal is transmitted.
For example, the mobile terminal may create a virtual bus card, when the user takes the bus, the processor 201 obtains the card number of the virtual bus card, and sends a first communication signal carrying the card number to the NFC coil 2022, and when the NFC coil 2022 receives the first communication signal, the first communication signal is converted into a corresponding first NFC signal, so that the first NFC signal carrying the card number can be transmitted, and then the card reading device configured on the bus can receive the first NFC signal, obtain the card number of the user, and deduct a money from an account corresponding to the card number.
The process of receiving a signal includes:
the communication device within the sensing range of the NFC coil 2022 transmits a second NFC signal, and the NFC coil 2022 receives the second NFC signal transmitted by the NFC communication device, converts the second NFC signal into a corresponding second communication signal, and sends the second communication signal corresponding to the second NFC signal to the processor 201.
For example, the mobile terminal may be used as a contactless card reader, when a bank card with an NFC function is in an induction range of the NFC coil 2022, the NFC coil 2022 receives a second NFC signal transmitted by the bank card, and the second NFC signal carries a bank card number, so that the NFC coil 2022 converts the second NFC signal into a second communication signal, and sends the second communication signal to the processor 201, and the processor 201 can obtain the bank card number.
According to the mobile terminal provided by the embodiment of the disclosure, the coil 202 is capacitively coupled with a human body part in an induction range to generate an induction signal, and the induction signal is sent to the processor 201, and the processor 201 reduces the electromagnetic radiation power of the mobile terminal according to the control signal, so that the SAR of the mobile terminal is reduced. The embodiment of the disclosure provides a mobile terminal using an existing coil of the mobile terminal as an induction element of an SAR sensor, which ensures a larger induction range, does not need to add a metal coating separately, saves cost, saves a larger space for the mobile terminal, can reduce the volume of the mobile terminal or be used for configuring other electronic elements, and improves flexibility.
Compared with the method that the antenna in the mobile terminal is used as an induction element of the SAR sensor, the SAR processing unit is connected into a matching circuit of the antenna and electrically connected with the antenna, because the metal body of the antenna is in direct current short circuit to the ground, a capacitor needs to be connected in series at the end, close to the antenna, of the matching circuit to realize the direct current short circuit of the antenna to the ground, and meanwhile, an inductor connected to the ground in parallel is added behind the capacitor to shield the influence of a signal source on the induction capacitor; because the working frequency of the antenna is higher, the added circuit elements can bring certain influence on the performance of the antenna; the additional Circuit occupies a PCB (Printed Circuit Board) space, which brings a certain limitation to the PCB design of the antenna. The embodiment of the disclosure provides a mobile terminal using an existing coil of the mobile terminal as an inductive element of an SAR sensor, the coil is a metal which is not short-circuited directly to the ground, and no other element is required to be added, so that the influence on the performance of inherent elements such as an antenna in the mobile terminal and the limitation on design are avoided.
In another possible implementation manner, when the human body part leaves the induction range of the coil 202, the coil 202 and the human body part do not perform capacitive coupling any more, and no induction signal is generated any more, the processor 201 does not receive a control signal any more, and it can be determined that the human body part has left the induction range of the coil 202 at this time, so that the electromagnetic radiation power of the mobile terminal is increased, and thus it is ensured that the mobile terminal can keep high-power operation when the human body part leaves.
For example, if the processor 201 reduces the electromagnetic radiation power from the first power to the second power when the human body part enters the induction range of the coil 202, the processor 201 increases the electromagnetic radiation power from the second power to the first power when the human body part leaves the induction range of the coil 202, and controls the antenna unit to perform the electromagnetic radiation according to the first power.
The transceiving performance of the antenna unit is related to the electromagnetic radiation power, the greater the electromagnetic radiation power adopted by the antenna unit is, the stronger the transceiving performance is, and the smaller the electromagnetic radiation power adopted is, the worse the transceiving performance is. In addition, SAR is also related to electromagnetic radiation power, the lower the SAR, the less electromagnetic radiation energy absorbed by the human body, the higher the electromagnetic radiation power, the higher the SAR, the more electromagnetic radiation energy absorbed by the human body.
Therefore, the receiving and transmitting performance and the SAR of the antenna unit are comprehensively considered, and the mobile terminal detects whether the human body part is close to the mobile terminal or not by arranging the SAR sensor, so that higher electromagnetic radiation power can be adopted when the human body part is not close to the mobile terminal, and the receiving and transmitting performance of the antenna unit is ensured. When the human body part is close to the mobile terminal, the electromagnetic radiation power is reduced, and the influence of the electromagnetic radiation on the human body is avoided as much as possible by adopting lower electromagnetic radiation power.
In another possible implementation, the mobile terminal further includes a decoupling circuit 204, as shown in fig. 5, the coil 202 is connected to the decoupling circuit 204, the decoupling circuit 204 is connected to the SAR processing unit 203, and the decoupling circuit 204 is used for isolating mutual interference between the speaker or the NFC module and the SAR processing unit 203.
When the coil 202 is capacitively coupled to a human body part within the sensing range to generate a sensing signal, a noise signal other than the sensing signal may exist on the coil 202, such as an interference signal generated by other components in the mobile terminal, a voice signal on the speaker coil, a communication signal on the NFC coil, and the like. When the coil 202 sends a signal to the decoupling circuit, the signal may include an induction signal and a noise signal, the decoupling circuit 204 receives the signal, removes the noise signal to obtain the induction signal, and sends the induction signal to the SAR processing unit 203, so that interference caused by the noise signal is avoided. After that, the SAR processing unit 203 receives the sensing signal and sends a control signal to the processor 201, and the processor 201 reduces the electromagnetic radiation power of the mobile terminal according to the received control signal.
The decoupling circuit 204 may be an active filter circuit, an LC (inductance capacitance) filter circuit, an L-shaped filter circuit, or a pi-shaped filter circuit.
In the embodiment of the disclosure, the coil sends a signal to the decoupling circuit, the signal includes an induction signal and a noise signal, the decoupling circuit removes the noise signal, the induction signal is sent to the SAR processing unit, the SAR processing unit receives the induction signal, the control signal is sent to the processor, and the processor reduces the electromagnetic radiation power of the mobile terminal according to the received control signal. By arranging the decoupling circuit between the coil and the SAR processing unit, interference can be avoided, the induction signal received by the SAR processing unit is more accurate, and the human body part in the induction range can be accurately identified.
Fig. 6 is a flowchart illustrating a control method of a mobile terminal according to an exemplary embodiment, where the method is applied to the mobile terminal illustrated in the above embodiment, as illustrated in fig. 6, and the method includes:
in step 601, the coil is capacitively coupled to a human body part within the sensing range to generate a sensing signal, and the sensing signal is transmitted to the SAR processing unit.
In step 602, the SAR processing unit sends a control signal to the processor when receiving the sensing signal.
In step 603, when the processor receives the control signal, the processor reduces the electromagnetic radiation power of the mobile terminal according to the control signal.
In one possible implementation, the method further comprises:
the processor sends a voice signal to the speaker coil, and the speaker coil plays the voice signal.
In another possible implementation, the method further includes:
the processor sends a first communication signal to the NFC coil, and the NFC coil sends a first NFC signal corresponding to the first communication signal when receiving the first communication signal.
Or the NFC coil receives a second NFC signal transmitted by the NFC communication equipment in the induction range, and sends a second communication signal corresponding to the second NFC signal to the processor.
In another possible implementation manner, the mobile terminal further includes: the coil is connected with the decoupling circuit, and the decoupling circuit is connected with the SAR processing unit; sending an induction signal to a SAR processing unit, comprising: the coil sends a signal to the decoupling circuit, the signal including an inductive signal and a noise signal.
The decoupling circuit removes noise signals and sends induction signals to the SAR processing unit.
According to the method provided by the embodiment of the disclosure, the coil is capacitively coupled with the human body part in the induction range to generate an induction signal, the induction signal is sent to the processor, and the processor reduces the electromagnetic radiation power of the mobile terminal according to the control signal, so that the SAR of the mobile terminal is reduced. The embodiment of the disclosure provides a control method of a mobile terminal, which uses an existing coil of the mobile terminal as an inductive element of an SAR sensor, without adding a metal coating separately, thereby saving cost, saving a larger space for the mobile terminal, reducing the volume of the mobile terminal or configuring other electronic elements by the saved space, and improving flexibility.
By arranging the decoupling circuit between the coil and the SAR processing unit, interference can be avoided, the induction signal received by the SAR processing unit is more accurate, and the human body part in the induction range can be accurately identified.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (10)
1. A mobile terminal, characterized in that the mobile terminal comprises: a processor, a coil and a SAR processing unit;
the coil is connected with the SAR processing unit;
The SAR processing unit is connected with the processor;
the coil is a loudspeaker coil or an NFC coil;
the coil is used for carrying out capacitive coupling with a human body part in an induction range, generating an induction signal and sending the induction signal to the SAR processing unit;
the SAR processing unit is used for sending a control signal to the processor when receiving the induction signal;
and the processor is used for reducing the electromagnetic radiation power of the mobile terminal according to the control signal when receiving the control signal.
2. The mobile terminal of claim 1, wherein the mobile terminal further comprises: a decoupling circuit, the coil being connected to the decoupling circuit, the decoupling circuit being connected to the SAR processing unit;
the coil is used for sending a signal to the decoupling circuit, and the signal comprises the induction signal and a noise signal;
the decoupling circuit is used for removing the noise signal and sending the induction signal to the SAR processing unit.
3. The mobile terminal of claim 2, wherein the decoupling circuit is an active filter circuit, an LC filter circuit, an L-filter circuit, or a pi-filter circuit.
4. The mobile terminal of claim 1, further comprising a housing, the processor and the SAR processing unit being located inside the housing;
the coil is located inside the surface of the housing or on the surface of the housing.
5. The mobile terminal of claim 1, wherein a maximum sensing distance of the sensing range is between 5 mm and 35 mm.
6. The mobile terminal of claim 5, wherein a maximum sensing distance of the sensing range is 30 mm.
7. A control method of a mobile terminal, applied to the mobile terminal of any one of claims 1 to 6, the method comprising:
the coil is capacitively coupled with a human body part in an induction range to generate an induction signal, and the induction signal is sent to the SAR processing unit;
the SAR processing unit sends a control signal to the processor when receiving the induction signal;
and when the processor receives the control signal, the electromagnetic radiation power of the mobile terminal is reduced according to the control signal.
8. The method of claim 7, further comprising:
The processor sends a voice signal to the loudspeaker coil, and the loudspeaker coil plays the voice signal.
9. The method of claim 7, further comprising:
the processor sends a first communication signal to the NFC coil;
when the NFC coil receives the first communication signal, a first NFC signal corresponding to the first communication signal is transmitted; alternatively, the first and second electrodes may be,
and the NFC coil receives a second NFC signal transmitted by the NFC communication equipment in the induction range and sends a second communication signal corresponding to the second NFC signal to the processor.
10. The method of claim 7, wherein the mobile terminal further comprises: a decoupling circuit, the coil being connected to the decoupling circuit, the decoupling circuit being connected to the SAR processing unit; the sending the sensing signal to the SAR processing unit includes:
the coil sends a signal to the decoupling circuit, the signal comprising the inductive signal and a noise signal;
the decoupling circuit removes the noise signal and sends the induction signal to the SAR processing unit.
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| CN201910345776.XA CN111865346A (en) | 2019-04-26 | 2019-04-26 | Mobile terminal and control method |
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| CN201910345776.XA CN111865346A (en) | 2019-04-26 | 2019-04-26 | Mobile terminal and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112422724A (en) * | 2020-11-20 | 2021-02-26 | 维沃移动通信有限公司 | Circuit structure, control method, device, electronic equipment and readable storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112422724A (en) * | 2020-11-20 | 2021-02-26 | 维沃移动通信有限公司 | Circuit structure, control method, device, electronic equipment and readable storage medium |
| CN113612875A (en) * | 2021-09-16 | 2021-11-05 | 上海锐伟电子科技有限公司 | Radiation control circuit and communication equipment |
| CN113612875B (en) * | 2021-09-16 | 2022-09-30 | 上海锐伟电子科技有限公司 | Radiation control circuit and communication equipment |
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Application publication date: 20201030 |