JP2013066307A - Wireless terminal, power transmission system, and power transmission method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology for successfully receiving electric power transmission while suitably receiving a wireless signal on a wireless terminal.SOLUTION: A wireless terminal 10 comprises: a receiving section 11; a charging device section 15; and a main control section 13 which continues or stops electric power transmission by a charging stand 20 to the charging device section 15 according to a reception quality measured while the charging device section 15 receives electric power transmission from the charging stand 20 and the receiving section 11 receives a wireless signal.

Description

  The present invention relates to a wireless terminal, a power transmission system including a wireless terminal and a power transmitter, and a power transmission method between the wireless terminal and the power transmitter.

  In recent years, wireless terminals that receive wireless signals have been increasingly used, such as the scheduled start of mobile reception terrestrial broadcasting. Therefore, there is a strong demand for a wireless terminal that can suitably receive a wireless signal.

  As a technique for suitably receiving a radio signal in a radio terminal, there is a technique disclosed in Patent Document 1. The portable terminal described in Patent Document 1 is a portable terminal that receives non-contact power transmission (contactless power transmission; see Non-Patent Document 1, etc.) from a primary device, and performs information communication with other terminals through an antenna. Prior to starting, the primary side device is requested to stop execution of contactless power transmission. As a result, before information communication is performed, the execution of contactless power transmission is stopped before the occurrence of harmonic noise due to the execution of contactless power transmission, ensuring the reliability of information communication. To do.

JP 2008-206297 (published September 4, 2008)

Qi System Description Wireless Power Transfer, Volume I: Low Power, Part 1: Interface Definition, Version 1.0.2, April 2011

  However, with the technique described in Patent Document 1, the wireless terminal cannot receive power transmission while receiving a wireless signal. Therefore, a wireless terminal that continuously receives wireless signals for a long time, a wireless terminal that frequently receives wireless signals, and the like may not be able to receive sufficient power transmission.

  The present invention has been made in view of the above problems, and provides a technique for sufficiently receiving power transmission while successfully suppressing adverse effects on reception of a radio signal due to power transmission in a wireless terminal. Is the main purpose.

  In order to solve the above-described problem, a wireless terminal according to the present invention includes a receiving unit that receives a radio signal, a power receiving unit that receives power transmission from an external power transmitter, and a measuring unit that measures reception quality in the receiving unit. The power receiving means receives power transmission, and the power transmission means continues to transmit power to the power receiving means according to the reception quality measured by the measuring means when the receiving means is receiving a radio signal. Or a control means for stopping.

  According to the above configuration, the wireless terminal receives power transmission from the power transmitter and receives a wireless signal. In such wireless terminals, noise due to power transmission may adversely affect reception of wireless signals. Further, as in the technique of Patent Document 1, if the power transmission is not performed when the wireless signal is received, the wireless terminal may not be able to receive the power transmission sufficiently.

  On the other hand, the present inventor suitably determines whether or not a radio signal is being received favorably by measuring reception quality when receiving a radio signal and receiving power transmission based on a unique idea. It can be determined and power transmission is continued as long as the radio signal is favorably received, and power transmission is stopped at the wireless terminal by stopping power transmission when the radio signal cannot be favorably received. The inventors have conceived that the power transmission can be sufficiently received while successfully suppressing the adverse influence on the reception of the resulting radio signal, and have completed the invention.

  That is, according to the above configuration, by continuing or stopping the power transmission according to the reception quality, the power transmission is continued as long as the wireless signal is favorably received, and the wireless signal cannot be favorably received. There is an effect that the power transmission can be sufficiently received while the power transmission is sometimes stopped and the adverse effect on the reception of the radio signal due to the power transmission is successfully suppressed.

  In the wireless terminal according to the present invention, the power transmission is preferably contactless power transmission.

  According to said structure, since a radio | wireless terminal receives electric power transmission from a power transmitter, it becomes unnecessary to connect a radio | wireless terminal and a power transmitter with a code | cord | chord etc., and can improve the freedom degree of handling of a radio | wireless terminal. In particular, in the non-contact power transmission, there is a possibility that the adverse effect on the reception of the radio signal may be increased. However, according to the present invention, the non-contact power transmission is continued or stopped according to the reception quality. As long as it is received properly, contactless power transmission is continued, and when wireless signals cannot be received properly, contactless power transmission is stopped, which adversely affects the reception of wireless signals due to power transmission. There is an effect that power transmission can be sufficiently received while being suppressed successfully.

  In the wireless terminal according to the present invention, the control means detects whether or not power can be transmitted from the power transmitter to the power receiving means, and when the receiving means is receiving a wireless signal. When it is detected that the power can be transmitted from the power transmitter to the power receiving means, the power transmission to the power receiving means is started by the power transmitter, and then according to the reception quality measured by the measuring means. Thus, it is preferable to continue or stop power transmission from the power transmitter to the power receiving means.

  According to the above configuration, when the wireless terminal is receiving a wireless signal, the wireless terminal is placed in a predetermined position on the power transmitter from a state in which power transmission is not possible. When the state changes to a possible state, first, power transmission for signal quality measurement is started. Then, the reception quality is measured in this state, and the power transmission is continued (normal power transmission is started) or the power transmission is stopped according to the result.

  As a result, when the wireless terminal is receiving the wireless signal, the power transmission can be started as long as the reception quality is ensured when the power transmission is possible.

  In the radio terminal according to the present invention, the control means uses the reception quality measured by the measurement means when the power reception means does not receive power transmission and the reception means receives a radio signal as a comparison reception quality. As a result of comparison between the reception quality measured by the measurement unit and the comparison reception quality when the power reception unit receives power transmission and the reception unit receives a radio signal. Accordingly, it is preferable to continue or stop the power transmission to the power receiving means by the power transmitter.

  Since the reception quality of a radio signal is affected by fading, reflection, and the like, it may vary even when noise due to power transmission does not occur. Here, according to the above configuration, since the reception quality when not receiving power transmission and the reception quality when receiving power transmission can be compared, the control means can be used for fading, reflection, etc. It is possible to more accurately evaluate the influence of the power transmission on the reception quality by eliminating the fluctuation caused by the change. Therefore, the effect of the present invention can be realized more suitably.

  A power transmission system according to the present invention includes the wireless terminal according to the present invention, and the power transmitter that transmits power to the power reception unit of the wireless terminal, and the power transmitter is connected to the wireless terminal. According to the control means, power transmission to the power receiving means of the wireless terminal is continued or stopped.

  According to said structure, the radio | wireless terminal can receive power transmission successfully, receiving a radio signal suitably.

  A power transmission method according to the present invention is a power transmission method between a wireless terminal that receives a wireless signal and a power transmitter that performs power transmission to the wireless terminal, wherein the wireless terminal receives power from the power transmitter. When the wireless terminal receives the transmission and receives the wireless signal, the wireless terminal measures the reception quality of the wireless signal, and the wireless terminal measures the reception quality measured in the measurement process. And a control step of continuing or stopping power transmission to the wireless terminal by the power transmitter.

  According to the above method, the wireless terminal can successfully receive power transmission while preferably receiving a wireless signal.

  ADVANTAGE OF THE INVENTION According to this invention, a radio | wireless terminal can receive electric power transmission successfully, receiving a radio signal suitably.

It is a figure which shows typically schematic structure, such as a radio | wireless terminal which concerns on one Embodiment of this invention. It is a flowchart which shows an example of the power transmission method which concerns on one Embodiment of this invention. It is a figure explaining an example of the reference | standard of determination of the reception quality in the electric power transmission method which concerns on one Embodiment of this invention. It is a flowchart which shows the other example of the electric power transmission method which concerns on one Embodiment of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

(Wireless terminal and charging stand)
FIG. 1 is a diagram schematically showing a schematic configuration of a wireless terminal and the like according to an embodiment of the present invention. As shown in FIG. 1, a wireless terminal 10 according to the present embodiment includes a receiving unit (receiving unit) 11, a quality monitoring unit (measuring unit) 12, a main control unit (control unit) 13, a charging processing unit 14, and a charging device. Unit (power receiving means) 15 and control circuit unit 16, receive a radio signal from radio station 30 and receive non-contact power transmission from charging stand (power transmitter) 20. Further, the charging stand 20 includes a charging device unit 21, a control circuit unit 22, and a charging processing unit 23. In the present embodiment, the wireless terminal 10 and the charging stand 20 constitute a power transmission system.

  The radio signal received by the radio terminal 10 from the radio station 30 is not particularly limited, and may be a broadcast signal or a radio signal constituting a part of bidirectional communication. The contents of the radio signal are not particularly limited, and may be a data signal, an audio signal, a video signal, a control signal, an authentication signal, or the like. Also, the frequency band and method of the radio signal are not particularly limited. The wireless station 30 may be a broadcasting station that performs wireless broadcasting to the wireless terminal 10, a mobile communication base station of the wireless terminal 10, or any wireless communication (including short-range wireless communication) with the wireless terminal 10. ) May be another wireless device.

  Moreover, in one Embodiment, although the radio | wireless terminal 10 may be portable terminals, such as a mobile telephone terminal, a portable information terminal, a smart phone, it is not limited to this. Moreover, the charging stand 20 should just be a thing which can transmit non-contact electric power to the radio | wireless terminal 10, and a structure in particular is not limited, The base in which the radio | wireless terminal 10 is mounted may not be sufficient.

  The receiving unit 11 includes an antenna, a matching circuit, a radio circuit, and the like, and receives a radio signal from the radio station 30.

  The quality monitoring unit 12 measures the reception quality of the radio signal received by the receiving unit 11. The quality monitoring unit 12 only needs to measure a known standard as reception quality by a known method, for example, C / N (Carrier to Noise), BER (Bit Error Rate), reception sensitivity, reception power. AGC (Auto Gain Control) or the like may be measured.

  The main control unit 13 performs a process corresponding to the content of the radio signal on the radio signal received by the receiving unit 11. The main control unit 13 also controls the charging stand 20 according to the reception quality measured by the quality monitoring unit 12. Details of the control of the charging stand 20 by the main control unit 13 will be described later. The main control unit 13 also detects whether or not the charging device unit 15 is in a chargeable state via the charging processing unit 14.

  The power transmission from the charging stand 20 to the wireless terminal 10 includes the charging device unit 21, the control circuit unit 22 and the charging processing unit 23 of the charging stand 20, and the charging device unit 15, the control circuit unit 16 and the charging process of the wireless terminal 10. This is realized by the cooperation of the unit 14.

  The charging device unit 21 is a mechanism for performing non-contact power transmission to the charging device unit 15, and includes, for example, a primary coil for non-contact power transmission. The control circuit unit 22 is a control circuit that controls the power transmission operation of the charging device unit 21, and exchanges control signals related to charging such as service information and timing information with the control circuit unit 16. The method of exchanging control signals between the control circuit unit 22 and the control circuit unit 16 is not particularly limited, and may be wired or wireless. For example, the charging device unit 15 and the charging device Wireless communication may be performed using a coil included in the unit 21. The charging processing unit 23 controls operations of the charging device unit 21 and the control circuit unit 22 so that non-contact power transmission from the charging stand 20 to the wireless terminal 10 is achieved.

  The charging device unit 15 is a mechanism for receiving non-contact power transmission from the charging device unit 21 and includes, for example, a secondary coil for non-contact power transmission. The charging device unit 15 also includes a battery for charging the electric power transmitted by the non-contact electric power. The control circuit unit 16 is a control circuit that controls the power receiving operation and the charging operation of the charging device unit 15, and exchanges control signals with the control circuit unit 22. The charging processing unit 14 controls operations of the charging device unit 21 and the control circuit unit 22 based on the control from the main control unit 13. In one embodiment, charging device unit 15 and control circuit unit 16 may be configured to be detachable as a battery pack.

  The contactless power transmission method used in the present embodiment is not particularly limited, and may be, for example, an electromagnetic induction method, a magnetic field resonance method, an electric field coupling method, a radio wave reception method, or the like. 1 may be used. It should be noted that those skilled in the art can appropriately apply known techniques to the configuration of the charging device unit 15 and the charging device unit 21 and the configuration of the control circuit unit 16 and the control circuit unit 22 according to the non-contact power transmission method to be used. Is easy to understand. For example, in the case of an electromagnetic induction method or a magnetic field resonance method, the charging device unit 21 may include a primary coil, and the charging device unit 15 may include a secondary coil. It is only necessary to have an electrode, and if it is a radio wave reception system, it is sufficient to have an antenna and a resonance circuit.

(Effect of this embodiment)
Here, when power is transmitted from the outside to the wireless terminal 10, particularly when power is supplied by non-contact power transmission as in the present embodiment, noise (harmonic noise, power supply system) is caused by the power transmission. Floor noise, etc.) may occur. This noise may adversely affect the radio signal received by the radio terminal 10 or the radio terminal 10, and may reduce the reception quality of the radio signal. However, as in Patent Document 1, if the power transmission is not performed when the wireless signal is received, the wireless terminal may not be able to receive the power transmission sufficiently.

  On the other hand, the wireless terminal 10 according to the present embodiment continues or stops power transmission according to reception quality, so that power transmission is continued as long as the wireless signal is favorably received. Therefore, the power transmission can be sufficiently received while the adverse effect on the reception of the radio signal due to the power transmission is successfully suppressed by stopping the power transmission when the reception becomes impossible.

  Hereinafter, the operation of the wireless terminal 10 will be described in detail.

(Operation example 1 in this embodiment)
FIG. 2 is a flowchart illustrating an example of the power transmission method according to the present embodiment. In the example illustrated in FIG. 2, the wireless terminal 10 is initially in a state of continuing communication and charging (step S12). That is, the receiving unit 11 receives a radio signal (including a broadcast signal) from the radio station 30, and the charging device unit 15 receives non-contact power transmission from the charging device unit 21.

  In this state, at a predetermined timing, the wireless terminal 10 determines whether or not the reception quality satisfies a predetermined level (step S13). That is, the quality monitoring unit 12 measures the reception quality of the radio signal received by the receiving unit 11, and the main control unit 13 makes a determination based on the result.

  FIG. 3 is a diagram for explaining an example of a criterion for determining whether or not the reception quality satisfies a predetermined level in the present embodiment. As shown in FIG. 3, in one example, the main control unit 13 compares each value of the reception quality measured within a predetermined period with a threshold value (comparison reception quality), so that the reception quality is a predetermined level. It is determined whether or not the above is satisfied.

  In the example illustrated in FIG. 3, the main control unit 13 determines that the reception quality satisfies a predetermined level when the reception quality exceeds a threshold in most of the predetermined period as illustrated in FIG. As shown in FIG. 3B, when the reception quality is below the threshold in most of the predetermined period, it is determined that the reception quality does not satisfy the predetermined level. Here, for example, as shown in FIG. 3 (c), when the reception quality exceeds or falls below the threshold within a predetermined period, the main control unit 13 determines that the reception quality is not stable. It may be determined that the quality does not satisfy a predetermined level.

  Note that the main control unit 13 may compare the reception quality value measured at a certain point of time with the threshold value instead of comparing the individual reception quality values measured within a predetermined period with the threshold value. Further, the main control unit 13 may compare a statistical value such as an average value calculated from individual values of reception quality measured within a predetermined period with a threshold value.

  Further, the threshold value to be compared may be a fixed value set in advance, but it is preferable to use a value dynamically calculated based on the reception quality measured by the quality monitoring unit 12. For example, the main control unit 13 stores the reception quality measured by the quality monitoring unit 12 when the reception unit 11 receives a radio signal and the charging device unit 15 is not receiving power from the charging device unit 21. Alternatively, the reception quality may be used as a threshold value.

  This is because the reception quality of a radio signal is affected by fading, reflection, and the like, and may vary even when noise due to power transmission is not generated. Therefore, by comparing the reception quality when not receiving power transmission with the reception quality when receiving power transmission, fluctuations caused by other than power transmission such as fading and reflection are canceled and received. This is because the influence of power transmission on quality can be more accurately evaluated.

  The main control unit 13 may use the reception quality measured by the quality monitoring unit 12 when it is not receiving power transmission as a threshold, or may use a statistical value such as an average value within a predetermined period as a threshold.

  When the main control unit 13 determines in step S13 that the reception quality does not satisfy the predetermined level, the process proceeds to step S14. In step S14, the main control unit 13 stops charging. Specifically, the main control unit 13 sends a control signal requesting to stop power transmission to the charging stand 20 via the charging processing unit 14 and the control circuit unit 16. The charging processing unit 23 of the charging stand 20 stops the non-contact power transmission by the charging device unit 21 when the control circuit unit 22 receives a control signal requesting to stop the power transmission.

  On the other hand, when the main control unit 13 determines in step S13 that the reception quality satisfies a predetermined level, the process returns to step S12 to continue communication and charging.

  Note that the reception quality determination (shift from step S12 to step S13) is preferably performed continuously at a constant period or an indefinite period. This is because the reception quality of the radio signal is affected by fading, reflection, etc., and may be temporarily lowered. Even if fading, reflection, etc. temporarily affect the determination of the reception quality by the main control unit 13 determining the reception quality continuously or at an indefinite period, the reception quality as a whole This is because it is possible to accurately evaluate the influence of the power transmission on the.

  On the other hand, by determining the reception quality only once for the first time from the start to the completion of charging, the main control unit 13 suppresses the power consumed for the determination of the reception quality. Electric power can also be reduced.

  The reception quality determination timing (timing for shifting from step S12 to step S13) can be set as appropriate. For example, the time when the receiving unit 11 receives a radio signal may be used as a trigger for determining the reception quality, or a certain period of time since the previous determination may be used as a trigger for determining the reception quality. The wireless terminal 10 may be in a state where it can receive power transmission from the charging stand 20 as a trigger for determining reception quality. This case will be described in detail in Operation Example 2.

  Note that the processing after the process proceeds to step S14 and charging is stopped can be set as appropriate. For example, the reception quality may be continuously determined at a constant period or an indefinite period, and charging may be resumed when the reception quality satisfies a predetermined level. That is, power transmission for reception quality confirmation may be temporarily started, and the process may return to step S13. On the other hand, in order to suppress the power consumed by the main control unit 13 for determining the reception quality, after the charging is temporarily stopped, the charging may be stopped until there is no reception for a certain period.

(Operation example 2 in this embodiment)
FIG. 4 is a flowchart illustrating another example of the power transmission method according to the present embodiment. In the example shown in FIG. 4, initially, the wireless terminal 10 continues communication and is not charged (step S <b> 22). That is, the receiving unit 11 receives a radio signal (including a broadcast signal) from the radio station 30, but the charging device unit 15 does not receive non-contact power transmission from the charging device unit 21. In this state, when the wireless terminal 10 detects a charging request (step S23), the processing after step S24 is started.

  In step S <b> 23, the main control unit 13 detects a charge request by detecting that the power can be received from the charging stand 20. The state that can receive power transmission from the charging stand 20 refers to the following state in one embodiment.

  That is, first, the charging processing unit 14 and the charging processing unit 23 detect that the charging device unit 15 and the charging device unit 21 are in a positional relationship where electric power can be transmitted. The charging processing unit 14 and the charging processing unit 23 detect, for example, that the coils included in the charging device unit 15 and the charging device unit 21 are affected by each other's magnetic field or electric field and cause voltage fluctuations. It can be detected that the charging device unit 15 and the charging device unit 21 are in a positional relationship in which power can be transmitted. Further, the positional relationship may be detected by other sensors or the like. Moreover, according to the detected positional relationship, you may move the coil etc. with which the charging device part 21 is provided to the position which can transmit non-contact electric power.

  Thereafter, the charging processing unit 14 and the charging processing unit 23 authenticate whether each other is a partner of non-contact power transmission by exchanging control signals between the control circuit unit 16 and the control circuit unit 22. Then, when the authentication of the charging processing unit 23 by the charging processing unit 14 is completed, the main control unit 13 detects that the power can be received from the charging stand 20.

  In step S24, the main control unit 13 starts charging for reception quality confirmation. Specifically, the main control unit 13 sends a control signal requesting the start of power transmission to the charging stand 20 via the charging processing unit 14 and the control circuit unit 16. When the control circuit unit 22 receives a control signal for requesting the start of power transmission, the charging processing unit 23 of the charging stand 20 starts non-contact power transmission by the charging device unit 21.

  Subsequently, the main control unit 13 determines whether or not the reception quality measured by the quality monitoring unit 12 satisfies a predetermined level in a state where power transmission from the charging stand 20 is started (step S25). Determination criteria and the like are the same as those in the first operation example.

  When the main control unit 13 determines in step S25 that the reception quality does not satisfy the predetermined level, the process proceeds to step S29. In step S29, as in step S14, the main control unit 13 stops charging.

  On the other hand, when the main control unit 13 determines in step S25 that the reception quality satisfies a predetermined level, normal charging is started in step S26.

  Then, in a state where the charging is continued (step S27), the main control unit 13 determines the reception quality as in step S13 (step S28), and the charging is continued according to the result (in step S27). Or the charging is stopped (the process proceeds to step S29).

  As described above, in the present embodiment, the main control unit 13 starts determining reception quality when the main control unit 13 detects that power transmission from the charging stand 20 has been detected. By doing so, the power transmission can be sufficiently received while the adverse effect on the reception of the radio signal due to the power transmission is successfully suppressed.

(Modification)
The main control unit 13 may change the control depending on the type of radio signal received by the receiving unit 11. For example, the above-described control is performed for a radio signal having a normal level of importance, while reception of the radio signal is prioritized for a radio signal having a high importance, and power from the charging stand 20 is always given. Transmission may be stopped. In addition, for wireless signals with low importance, charging may be prioritized and power transmission from the charging stand 20 may be continued at all times. The main control unit 13 may change the control according to the amount of charge in the charging device unit 15. For example, when the amount of charge is low, power transmission from the charging stand 20 may be continued at all times.

  In the above-described embodiment, the case where the wireless terminal 10 uses the power obtained by the power transmission from the charging stand 20 for charging has been described. However, the power obtained by the power transmission from the charging stand 20 is wirelessly It may be used directly for the operation of the terminal 10.

  Moreover, although the above-mentioned embodiment demonstrated the case where the electric power transmission between the charging device part 15 and the charging device part 21 was non-contact electric power transmission, between the charging device part 15 and the charging device part 21 was demonstrated. The power transmission may be wired power transmission. Even in such a case, it is possible to suppress the adverse effect on the reception quality of the radio signal due to the floor noise of the power supply system. Can receive enough transmission.

  However, since the wireless terminal 10 is configured to receive non-contact power transmission from the charging stand 20 as in the above-described embodiment, it is not necessary to connect the wireless terminal 10 and the charging stand 20 with a cord or the like. The degree of freedom in handling the wireless terminal 10 is improved, which is preferable.

(Program and recording medium)
Finally, the main control unit 13 may be realized in hardware by a logic circuit formed on an integrated circuit (IC chip), or may be realized in software using a CPU (Central Processing Unit). Good.

  In the latter case, the main control unit 13 includes a CPU that executes instructions of a program that realizes each function, a ROM (Read Only Memory) that stores the program, a RAM (Random Access Memory) that expands the program, the program, A storage device (recording medium) such as a memory for storing various data is provided. An object of the present invention is to provide a recording medium on which a program code (execution format program, intermediate code program, source program) of a control program of the main control unit 13 which is software for realizing the above-described functions is recorded so as to be readable by a computer This can also be achieved by supplying the program to the main control unit 13 and reading and executing the program code recorded on the recording medium by the computer (or CPU or MPU).

  Examples of the recording medium include tapes such as magnetic tapes and cassette tapes, magnetic disks such as floppy (registered trademark) disks / hard disks, and disks including optical disks such as CD-ROM / MO / MD / DVD / CD-R. IC cards (including memory cards) / optical cards, semiconductor memories such as mask ROM / EPROM / EEPROM / flash ROM, PLD (Programmable logic device), FPGA (Field Programmable Gate Array), etc. Logic circuits can be used.

  The main control unit 13 may be configured to be connectable to a communication network, and the program code may be supplied via the communication network. The communication network is not particularly limited as long as it can transmit the program code. For example, the Internet, intranet, extranet, LAN, ISDN, VAN, CATV communication network, virtual private network, telephone line network, mobile communication network, satellite communication network, and the like can be used. The transmission medium constituting the communication network may be any medium that can transmit the program code, and is not limited to a specific configuration or type. For example, even with wired lines such as IEEE 1394, USB, power line carrier, cable TV line, telephone line, and ADSL (Asymmetric Digital Subscriber Line) line, infrared rays such as IrDA and remote control, Bluetooth (registered trademark), IEEE 802.11 wireless, HDR ( It can also be used by radio such as High Data Rate (NFC), Near Field Communication (NFC), Digital Living Network Alliance (DLNA), mobile phone network, satellite line, and digital terrestrial network.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention.

  The present invention can be used in the field of manufacturing wireless terminals and related products (for example, a charging stand) of the wireless terminals.

10 wireless terminal 11 receiving unit (receiving means)
12 Quality monitoring section (measuring means)
13 Main control unit (control means)
14 Charging Processing Unit 15 Charging Device Unit (Power Receiving Unit)
16 Control circuit unit 20 Charging stand (power transmitter)
21 charging device unit 22 control circuit unit 23 charging processing unit 30 radio station

Claims (6)

Receiving means for receiving a radio signal;
A power receiving means for receiving power transmission from an external power transmitter;
Measuring means for measuring reception quality in the receiving means;
Depending on the reception quality measured by the measurement means when the power reception means receives power transmission and the reception means is receiving a radio signal, the power transmission to the power reception means is continued or stopped by the power transmitter. A wireless terminal.   The wireless terminal according to claim 1, wherein the power transmission is contactless power transmission. The control means includes
Detecting whether it is in a state where power can be transmitted from the power transmitter to the power receiving means;
When the receiving means is receiving a radio signal, when it is detected that power can be transmitted from the power transmitter to the power receiving means, the power transmitter is caused to start power transmission to the power receiving means. 2. The wireless terminal according to claim 1, wherein power transmission to the power receiving means by the power transmitter is continued or stopped according to the reception quality measured by the measuring means. The control means includes
Storing the reception quality measured by the measurement unit when the power reception unit does not receive power transmission and the reception unit is receiving a radio signal, as a reception quality for comparison;
The power transmitter according to a result of comparing the reception quality measured by the measurement unit and the reception quality for comparison when the power reception unit receives power transmission and the reception unit receives a radio signal. The wireless terminal according to claim 1, wherein power transmission to the power receiving unit is continued or stopped. A wireless terminal according to claim 1;
The power transmitter for transmitting power to the power receiving means of the wireless terminal,
The power transmission system, wherein the power transmitter is configured to continue or stop power transmission to the power receiving means of the wireless terminal according to the control means of the wireless terminal. A power transmission method between a wireless terminal that receives a wireless signal and a power transmitter that transmits power to the wireless terminal,
A measurement step in which when the wireless terminal receives power transmission from the power transmitter and the wireless terminal receives a wireless signal, the wireless terminal measures reception quality of the wireless signal;
And a control step of causing the wireless terminal to continue or stop power transmission to the wireless terminal according to the reception quality measured in the measurement step. .

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