WO2019146362A1 - Electronic device, power transmission device, and power transmission method - Google Patents

Abstract

A power transmission method including the following steps: a step in which a first power transmission device transmits power using first radio waves; a step in which a second power transmission device transmits power using second radio waves; a step in which an electronic device is made capable of receiving at least either the first radio waves or the second radio waves; and a step in which the first power transmission device controls the format in which power is transmitted using the first radio waves, on the basis of information pertaining to the second radio waves, if the electronic device is capable of receiving first radio waves and second radio waves.

Description

Electronic device, power transmission device, and power transmission method Cross-reference to related applications

This application claims the priority of Japanese Patent Application No. 2018-11864 filed on Jan. 26, 2018, the entire disclosure of which is incorporated herein by reference.

The present disclosure relates to an electronic device, a power transmission device, and a power transmission method.

Conventionally, a method of supplying power to an electronic device using an electromagnetic wave is known. For example, Patent Document 1 discloses a power transmitter that supplies power to a device using microwaves.

JP, 2014-223018, A

The power transmission method according to an embodiment includes the following steps.
The first power transmission apparatus performs power transmission by the first radio wave.
The second power transmission apparatus performs power transmission by the second radio wave.
Making an electronic device capable of receiving at least one of the first radio wave and the second radio wave;
The first power transmission apparatus controls an aspect of performing power transmission by the first radio wave based on information on the second radio wave when the electronic device can receive the first radio wave and the second radio wave.

The electronic device according to an embodiment receives at least one of a first radio wave transmitting power transmission from the first power transmission device and a second radio wave transmitting power transmission from the second power transmission device.
When the electronic device can receive the first radio wave and the second radio wave, the electronic device transmits information on the second radio wave to the first power transmission device, and requests power transmission by the first radio wave to the first power transmission device. Do.

The power transmission device according to one embodiment transmits power to at least one electronic device by the first radio wave.
The power transmission device transmits power by the first radio wave based on the information on the second radio wave, when the electronic device can receive the second radio wave transmitting the first radio wave and the power transmission from the other power transmission device. Control the mode of operation.

It is a figure explaining composition of a power transmission system concerning one embodiment. It is a block diagram which shows the example of schematic structure of the electronic device which concerns on one Embodiment. It is a block diagram showing an example of a schematic structure of a power transmission device concerning one embodiment. It is a figure explaining operation of a power transmission system concerning one embodiment. It is a flow chart explaining operation of a power transmission system concerning one embodiment. It is a flow chart explaining operation of a power transmission system concerning one embodiment. It is a flow chart explaining operation of a power transmission system concerning one embodiment. It is a flow chart explaining operation of a power transmission system concerning one embodiment. It is a figure explaining operation of a power transmission system concerning one embodiment.

Improvement of convenience is desired for the spread of a power transmission system including a power transmission device using wireless. The present disclosure relates to providing a highly convenient electronic device, a power transmission device, and a power transmission method. According to one embodiment, a highly convenient electronic device, a power transmission device, and a power transmission method can be provided. Hereinafter, an embodiment will be described with reference to the drawings.

FIG. 1 is a diagram showing a schematic configuration of a power transmission system 1 according to an embodiment. Hereinafter, the power transmission system 1 which concerns on one Embodiment is demonstrated.

A power transmission system 1 according to an embodiment includes a plurality of power transmission devices, as shown in FIG. FIG. 1 illustrates a first power transmission device 10 and a second power transmission device 20 as an example of the plurality of power transmission devices. The power transmission system 1 may further include other power transmission devices such as the first power transmission device 10 and the second power transmission device 20, for example.

The first power transmission device 10 and the second power transmission device 20 wirelessly transmit power to at least one electronic device 100 located within a predetermined range. As shown in FIG. 1, a range in which the first power transmission apparatus 10 can transmit power wirelessly (a range in which radio waves can reach) is shown as a first range A1. In FIG. 1, the first range A1 is shown as a range surrounded by an alternate long and short dash line. Further, as shown in FIG. 1, a range in which the second power transmission apparatus 20 can wirelessly transmit power (a range in which radio waves can reach) is shown as a second range A2. In FIG. 1, the second range A2 is shown as a range surrounded by a two-dot chain line.

Moreover, the power transmission system 1 which concerns on one Embodiment contains at least 1 electronic device 100, as shown in FIG. FIG. 1 illustrates electronic devices 100A to 100E as an example of at least one electronic device 100. Hereinafter, in the case where the electronic devices 100A to 100E are not particularly distinguished, they may be collectively referred to as the “electronic device 100” as appropriate. In the example illustrated in FIG. 1, the first power transmission apparatus 10 can wirelessly transmit power to the electronic devices 100A, 100B, 100C, and 100D located in the first range A1. Further, in the example illustrated in FIG. 1, the second power transmission apparatus 20 can wirelessly transmit power to the electronic device 100E located in the second range A2. Thus, in one embodiment, the first power transmission apparatus 10 wirelessly transmits power to at least one electronic device 100 located within the first range A1. In one embodiment, the second power transmission apparatus 20 wirelessly transmits power to at least one electronic device 100 located in the second range A2. The number of electronic devices 100 located in the first range A1 and the second range A2 may be any number.

The first power transmission device 10 and the second power transmission device 20 can be connected wirelessly within a predetermined range in which radio waves reach each other. Thereby, the 1st power transmission device 10 and the 2nd power transmission device 20 can communicate by radio. In addition, the first power transmission device 10 and the second power transmission device 20 may be connected by wire using a predetermined cable or the like. In FIG. 1, the connection between the first power transmission device 10 and the second power transmission device 20 is not shown. Here, when the first power transmission device 10 and the second power transmission device 20 are connected wirelessly, a communication method conforming to any of various communication standards may be adopted for the connection. For example, communication between the first power transmission device 10 and the second power transmission device 20 may be performed by Wi-Fi or the like. Also, for example, communication between the first power transmission device 10 and the second power transmission device 20 may be performed by Bluetooth (registered trademark), Z-wave, ZigBee, or the like.

In one embodiment, wireless communication between the first power transmission device 10 and the second power transmission device 20 may be performed using radio waves for performing the above-described power transmission. That is, in one embodiment, each of the first power transmission apparatus 10 and the second power transmission apparatus 20 may use radio waves for communication other than radio waves for power transmission, or radio waves for power transmission The radio wave for communication may be the same. For example, a first range A1 illustrated in FIG. 1 indicates a range within which radio waves transmitted by the first power transmission device 10 can reach, and a second range A2 illustrated in FIG. The range may be indicated. In this case, there is no overlap between the first range A1 and the second range A2 shown in FIG. Therefore, the first power transmission device 10 can not wirelessly transmit power to the electronic device 100E located in the second range A2. Moreover, the 2nd power transmission apparatus 20 can not communicate by radio | wireless with the electronic devices 100A, 100B, 100C, and 100D located in 1st range A1. Furthermore, the second power transmission device 20 can not wirelessly communicate with the first power transmission device 10 located in the first range A1.

As a scene where the power transmission system 1 shown in FIG. 1 is implemented, for example, a platform of a railway station or a station yard is assumed. In this case, a plurality of power transmission devices such as the first power transmission device 10 and the second power transmission device 20 may be installed at a predetermined position of a station, for example, as a power feeding device such as a power transmission station. And in this case, at least one electronic device 100 may be various electronic devices, such as a smartphone, carried by a user of the station. In such an installation mode, the user of the station can perform wireless power supply without connecting a power supply cable to a connector to various electronic devices such as a smartphone carried by each user. In this case, the wirelessly supplied power may be charged in storage batteries incorporated in various electronic devices, or may be consumed directly without being stored in various electronic devices.

Moreover, as a scene where the power transmission system 1 shown in FIG. 1 is implemented, for example, it is assumed that at least a part of a security system such as a home or an office is configured. For example, when an IoT network device is installed in a home or an office, it is possible to wirelessly feed the IoT sensor group for crime prevention for these devices. In this case, a plurality of power transmission devices such as the first power transmission device 10 and the second power transmission device 20 may be installed at a predetermined position (for example, a feeding spot) in a home or office. And in this case, at least one electronic device 100 may be an IoT sensor group or an IoT tag for crime prevention. Also in this case, the wirelessly-charged power may be charged in a storage battery incorporated in the IoT sensor group or the IoT tag, or may be consumed directly in the IoT sensor group or the IoT tag.

At least one electronic device 100 illustrated in FIG. 1 receives power transmitted from a power transmission device such as the first power transmission device 10 and / or the second power transmission device 20, for example.

In one embodiment, electronic device 100 can be any electronic device that requires power. The electronic device 100 includes, for example, a smartphone, a mobile phone, a tablet terminal, a notebook PC, an electronic dictionary, an electronic book reader, a music player, an electronic musical instrument, a pager, a game terminal, a clock, a display device, an IoT unit, an IoT sensor, an IoT tag, Etc. Also, the electronic device 100 may be, for example, a radio, a remote control, a mouse, a drone, an IC card reader, a cash register, a vending machine, or the like. The electronic device 100 is not limited to the above-described one, and can be any electronic device that can be driven by the power transmitted from the power transmission device such as the first power transmission device 10 and the second power transmission device 20.

In one embodiment, electronic device 100 may have a shape that can be accommodated, for example, in a battery holder of another electronic device. In this case, the electronic device 100 may have an external appearance, for example, in the form of a dry cell or a button cell. The other electronic device incorporating the electronic device 100 can be driven by the power supplied from the electronic device 100.

FIG. 2 is a functional block diagram showing a schematic configuration of the electronic device 100. As shown in FIG. Hereinafter, the electronic device 100 will be described. Since the electronic device 100 can be various devices as described above, the description of functions specific to each of the various devices is omitted. Hereinafter, among the functions included in the electronic device 100, functions having high relevance to the function of receiving power transmitted from the power transmission device such as the first power transmission device 10 and the second power transmission device 20 will be mainly described. Also, in the following, more detailed description will be omitted as appropriate for items that are generally known for receiving power that is transmitted by wireless.

The electronic device 100 receives wireless power from a power transmission device such as the first power transmission device 10 and / or the second power transmission device 20, for example. Specifically, the electronic device 100 receives an electromagnetic wave for power supply from, for example, the first power transmission device 10 and / or the second power transmission device 20. In the electronic device 100, the received electromagnetic waves are converted into direct current power. Thus, the electronic device 100 receives wireless power.

As shown in FIG. 2, the electronic device 100 includes a power receiving unit 120, a communication unit 121, a storage unit 130, a control unit 131, and a storage unit 140.

Power reception unit 120 receives wireless power. Specifically, the power reception unit 120 receives wireless power by generating power based on an electromagnetic wave received from the outside based on the control of the control unit 131. The power receiving unit 120 includes a positive electrode terminal and a negative electrode terminal. The positive electrode terminal is connected to the terminal on the positive electrode side of each functional unit of the electronic device 100. The negative electrode terminal is connected to the terminal on the negative electrode side of each functional unit of the electronic device 100. The power receiving unit 120 supplies the generated electric power to each functional unit of the electronic device 100 through the positive electrode terminal and the negative electrode terminal. The potential difference between the positive electrode terminal and the negative electrode terminal may be, for example, a potential difference according to the electronic device 100 to which power is supplied. Thus, the electronic device 100 can supply the power received by the power receiving unit 120 to each functional unit of the electronic device 100.

The power receiving unit 120 includes a power receiving antenna 120A and a rectifier circuit 120B. The power receiving antenna 120A receives electromagnetic waves from power transmission devices such as the first power transmission device 10 and the second power transmission device 20. The rectifier circuit 120B converts the electromagnetic wave received by the power receiving antenna 120A into DC power. The rectifier circuit 120B supplies the converted direct current power to the electronic device 100 through the positive electrode terminal and the negative electrode terminal.

The communication unit 121 performs wireless communication with an external device based on the control of the control unit 131. The communication unit 121 may communicate with power transmission devices such as the first power transmission device 10 and the second power transmission device 20, for example. Also, the communication unit 121 may communicate with another electronic device 100. The communication unit 121 may communicate with other electronic devices other than the other electronic device 100. The electronic device 100 may perform wireless communication using the power receiving antenna 120A instead of the communication unit 121. The communication unit 121 may transmit a power transmission request for requesting power transmission to power transmission devices such as the first power transmission device 10 and the second power transmission device 20, for example.

The storage unit 130 can be configured by a semiconductor memory, a magnetic memory, or the like. The storage unit 130 stores various information and / or programs for operating the electronic device 100. The storage unit 130 may also function as a work memory. In one embodiment, the storage unit 130 may store information received from a power transmission device such as the first power transmission device 10 or the second power transmission device 20, for example.

The control unit 131 is a processor that controls and manages the entire electronic device 100, including the functional blocks that constitute the electronic device 100. The control unit 131 is configured of a processor such as a central processing unit (CPU) that executes a program defining a control procedure, or a dedicated processor specialized for processing of each function. In addition, the control unit 131 may control various other functional units that constitute the electronic device 100.

Power storage unit 140 is electrically connected to the positive electrode terminal and the negative electrode terminal of power reception unit 120. Power storage unit 140 can store the power not supplied to electronic device 100 among the power received by power reception unit 120. For example, when the electronic device 100 can not receive wireless power from a power transmission device such as the first power transmission device 10 and / or the second power transmission device 20, the power stored by the power storage unit 140 can be received via the positive electrode terminal and the negative electrode terminal. , May be supplied to the electronic device 100.

FIG. 3 is a functional block diagram showing a schematic configuration of a power transmission device such as the first power transmission device 10 and the second power transmission device 20. As shown in FIG. Hereinafter, the first power transmission device 10 will be described as a representative example. The second power transmission device 20 and the other power transmission devices can also be configured similarly to the first power transmission device 10. Hereinafter, more detailed description of matters generally known for wireless power transmission will be omitted.

The first power transmission device 10 is, for example, a home gateway or a wireless power transmission system, and is installed, for example, indoors. The first power transmission device 10 transmits, for example, wireless power to the power reception unit 120 of the electronic device 100. Specifically, the first power transmission device 10 generates an electromagnetic wave for power supply. The first power transmission apparatus 10 transmits the generated electromagnetic waves to the electronic device 100 in the electronic device 100 located, for example, in the same room. In the example illustrated in FIG. 1, the first power transmission device 10 transmits an electromagnetic wave to the power reception unit 120 provided in each of the electronic devices 100A, 100B, 100C, and 100D. Further, in the example illustrated in FIG. 1, the second power transmission apparatus 20 transmits an electromagnetic wave to the power receiving unit 120 included in the electronic device 100E.

The first power transmission apparatus 10 may perform authentication with at least one electronic device 100, and may transmit an electromagnetic wave for power supply only to the power receiving unit 120 of the electronic device 100 for which the authentication is successful. This can prevent the first power transmission device 10 from supplying power to an unintended electronic device (e.g., an electronic device in a neighboring house). On the other hand, the first power transmission apparatus 10 may transmit an electromagnetic wave for power supply to the power reception unit 120 of the electronic device 100 without performing authentication with at least one electronic device 100. Thereby, the first power transmission device 10 can be installed in a public place, and the first power transmission device 10 can supply power to any electronic device.

The first power transmission device 10 includes a control unit 40, a storage unit 42, a power transmission unit 50, an amplifier 52, a power transmission antenna 54, a communication unit 60, an amplifier 62, and a communication antenna 64.

The control unit 40 is a processor that controls and manages the entire first power transmission device 10, including the functional blocks of the first power transmission device 10. The control unit 40 is configured of a processor such as a CPU (Central Processing Unit) that executes a program defining a control procedure, or a dedicated processor specialized for the processing of each function.

The storage unit 42 can be configured by a semiconductor memory, a magnetic memory, or the like. The storage unit 42 stores various information and / or programs for operating the first power transmission apparatus 10 and the like. The storage unit 42 may also function as a work memory. The storage unit 42 may store, for example, identification information or the like of the power reception unit 120 and / or the electronic device 100 that has performed authentication. In one embodiment, the storage unit 42 may store information as to whether or not radio waves from another power transmission device such as the second power transmission device 20 have been received, as described later. In addition, when receiving a radio wave from another power transmission device such as, for example, the second power transmission device 20, the storage unit 42 may store various information related to the other power transmission device. In addition, the storage unit 42 may store, for example, information on an operation and / or process performed by the first power transmission device 10 when a radio wave from another power transmission device such as the second power transmission device 20 is received. . In the case described above, the first power transmission device 10 may receive various information from the second power transmission device 20 or the electronic device 100 and store the information in the storage unit 42.

The power transmission unit 50 transmits wireless power. Specifically, based on the control of the control unit 40, the power transmission unit 50 transmits wireless power by outputting, for example, the power supplied from a power supply such as a distribution facility as an electromagnetic wave.

The power transmission unit 50 is connected to the amplifier 52. The amplifier 52 is a power amplifier that amplifies the radio wave output from the power transmission unit 50. Also, the amplifier 52 is connected to the power transmission antenna 54. The power transmission antenna 54 transmits the radio wave amplified by the amplifier 52 to the power reception unit 110 of at least one electronic device 100. The power transmission antenna 54 may transmit the radio wave amplified by the amplifier 52 to another power transmission device such as the second power transmission device 20, for example. The power transmission unit 50 appropriately includes, for example, a functional unit such as an oscillator necessary for transmitting wireless power. In this case, the oscillator transmits wireless power by transmitting an electromagnetic wave from the power transmission antenna 54 based on the power supplied from the power supply. Thus, in one embodiment, the power transmission unit 50 performs power transmission by radio waves. Hereinafter, the radio wave for power transmission transmitted by the power transmission unit 50 of the first power transmission device 10 is appropriately referred to as a first radio wave R1. That is, the power transmission unit 50 of the first power transmission device 10 transmits power by the first radio wave R1. Also, hereinafter, a radio wave for power transmission transmitted by the power transmission unit 50 of the second power transmission device 20 will be appropriately referred to as a second radio wave R2. That is, the power transmission unit 50 of the first power transmission device 10 transmits power by the second radio wave R2.

The communication unit 60 performs wireless communication with an external device based on the control of the control unit 40. In the present embodiment, the communication unit 60 communicates with at least one of (a communication unit of) another power transmission apparatus such as the second power transmission apparatus 20 and (a communication unit 121 of) at least one electronic device 100. In one embodiment, the communication unit 60 may receive radio waves transmitted from (a communication unit of) another power transmission device such as the second power transmission device 20. The communication unit 60 may also receive, for example, a power transmission request transmitted from (the communication unit 121 of) the electronic device 100.

The communication unit 60 is connected to the amplifier 62. The amplifier 52 is a power amplifier that amplifies the radio wave output from the communication unit 60. Also, the amplifier 62 is connected to the communication antenna 64. The communication antenna 64 is at least one of (a communication unit 60 of) another power transmission apparatus such as the second power transmission apparatus 20 and at least one of (a communication unit 121 of) the at least one electronic device 100. Send to

As shown in FIG. 3, the communication unit 60 may more specifically include a transmitter 61A and a receiver 62B. The transmitter 61A transmits the signal supplied from the controller 40 via the amplifier 62 and the communication antenna 64. That is, the transmitting unit 61A transmits the signal relating to the communication through the amplifier 62 and the communication antenna 64 to (the communication unit 60 of) another power transmission apparatus such as the second power transmission apparatus 20, and at least one electronic device 100 (of It transmits to at least one of the communication units 121). The receiver 61 B also receives a signal via the communication antenna 64 and the amplifier 62, and supplies the received signal to the controller 40. That is, the receiving unit 61B relates to the communication transmitted by at least one of (the communication unit 60 of (the communication unit 60 of) another power transmission apparatus such as the second power transmission apparatus 20 and (the communication unit 121 of) the at least one electronic device 100. A signal is received via communication antenna 64 and amplifier 62. Alternatively, the receiving unit 61B may receive a signal related to communication from the communication antenna 64 without passing through the amplifier 62.

In one embodiment, the communication unit 60 may communicate by a communication method such as Bluetooth (registered trademark), Z-wave, ZigBee, and Wi-Fi. Thus, in one embodiment, the receiver 61B receives radio waves for communication transmitted from other devices.

Each of the control unit 40, the power transmission unit 50, and the communication unit 60 may include at least one processor, such as a CPU, to provide control and processing capabilities for performing various functions. Each of control unit 40, power transmission unit 50, and communication unit 60 may be realized collectively by one processor, may be realized by several processors, or may be realized by respective processors. Good. The processor may be implemented as a single integrated circuit. The integrated circuit is also referred to as an integrated circuit (IC). The processor may be implemented as a plurality of communicatively coupled integrated circuits and discrete circuits. The processor may be implemented based on various other known techniques. In one embodiment, each of the control unit 40, the power transmission unit 50, and the communication unit 60 may be configured as, for example, a CPU and a program executed by the CPU.

In FIG. 3, the power supply for supplying the power supplied to the functional units constituting the first power transmission device 10 and the configuration in which the power is supplied from the power supply to the respective functional units are not shown. In addition, first power transmission device 10 may include, for example, a power storage unit configured by a storage battery or the like. In this case, the first power transmission device 10 can store the power supplied from the power supply.

The first power transmission apparatus 10 has been described above, but as described above, the second power transmission apparatus 20 may have the same or substantially the same configuration and function.

Next, the operation of the power transmission system 1 according to an embodiment will be described.

First, an example of arrangement of the first power transmission device 10 and the second power transmission device 20 in the power transmission system 1 will be described. As described above, in FIG. 1, the range in which the first power transmission device 10 can perform power transmission by radio waves is indicated as a first range A1, and the range in which the second power transmission device 20 can perform power transmission by radio waves is the second It showed as range A2.

In this case, in the example illustrated in FIG. 1, the first power transmission apparatus 10 can perform electric power transmission to the electronic devices 100A, 100B, 100C, and 100D located in the first range A1. On the other hand, in the example illustrated in FIG. 1, the first power transmission device 10 can not transmit power by radio waves to the electronic device 100E located outside the first range A1. Moreover, in the example shown in FIG. 1, the 2nd power transmission apparatus 20 can transmit electric power with an electromagnetic wave with respect to the electronic device 100E located in 2nd range A2. On the other hand, in the example illustrated in FIG. 1, the second power transmission device 20 can not transmit electric power by radio waves to the electronic devices 100A, 100B, 100C, and 100D located outside the second range A2.

As described above, in the example of the arrangement illustrated in FIG. 1, the reach of the radio waves transmitted from the first power transmission device 10 and the second power transmission device 20 does not overlap. Therefore, the radio waves transmitted from the first power transmission device 10 and the second power transmission device 20 do not interfere, and there is no portion where the radio wave intensity becomes relatively high. Therefore, in such a case, there are few concerns such as a decrease in transmission efficiency and a failure in communication.

Next, another example of the arrangement of the first power transmission device 10 and the second power transmission device 20 in the power transmission system 1 will be described. FIG. 4 is a diagram for explaining the operation of the power transmission system 1 according to an embodiment. FIG. 4 is a diagram showing an example in which the first power transmission device 10 and the second power transmission device 20 in the power transmission system 1 are arranged to be different from those in FIG. 1. The description of FIG. 4 that is similar to that of FIG. 1 will be omitted as appropriate.

The relationship between the ranges reached by radio waves transmitted from the plurality of power transmission devices, such as the relationship between the first range A1 and the second range A2 shown in FIG. You can change it by Also, for example, even if there is no change in the number of installed power transmission devices in the power transmission system, the positions of the plurality of power transmission devices are relatively changed, thereby changing the relationship of the reach of radio waves transmitted from the plurality of power transmission devices. It can. In particular, when at least one of the first power transmission device 10 and the second power transmission device 20 is configured to be movable, the relationship between the reach of radio waves transmitted from the first power transmission device 10 and the second power transmission device 20 is easy. Can change to

In the example illustrated in FIG. 4, the ranges reached by radio waves respectively transmitted from the first power transmission device 10 and the second power transmission device 20 partially overlap. That is, in FIG. 4, the first range A1 in which the first power transmission device 10 can perform power transmission by radio waves and the second range A2 in which the second power transmission device 20 can perform power transmission by radio waves are partial. Overlap. In particular, in the example shown in FIG. 4, the electronic devices 100C and 100D are included in both the first range A1 and the second range A2. Therefore, in the example illustrated in FIG. 4, the electronic devices 100C and 100D can receive radio waves respectively transmitted from both the first power transmission device 10 and the second power transmission device 20.

As in the example shown in FIG. 4, when power transmission is performed by installing a plurality of power transmission devices, the radio waves in the portion where the radio waves interfere at overlapping positions where the radio waves transmitted from the plurality of power transmission devices reach each other. It is assumed that the strength is relatively high. As described above, when the radio wave interferes and the radio wave intensity increases, there is a concern that the power transmission efficiency may be reduced, the communication may be disturbed, and the like. Therefore, in the power transmission system 1 according to the embodiment, for example, control is performed to cope with the case where the strengths of radio waves transmitted from the plurality of power transmission devices are relatively high. Hereinafter, such control will be further described.

Hereinafter, in the power transmission system 1 as shown in FIG. 4, an operation performed by the first power transmission device 10 according to the embodiment will be described. Hereinafter, as shown in FIG. 4, the power transmission system 1 includes the first power transmission device 10 and the second power transmission device 20, and at least one electronic device 100. Also, at least one of the electronic devices 100 can receive at least one of the first radio wave R1 transmitted from the first power transmission device 10 and the second radio wave R2 transmitted from the second power transmission device 20, respectively. Do.

FIG. 5 is a flowchart illustrating an example of the operation of the first power transmission device 10 according to an embodiment. FIG. 5 illustrates an operation when the first power transmission apparatus 10 according to an embodiment performs power transmission by the first radio wave R1 (for example, to at least one electronic device 100). As an example, the first power transmission device 10 according to an embodiment performs power transmission by the first radio wave R1 when, for example, the first power transmission device 10 starts up by turning on the switch of the first power transmission device 10 or the like. You may start the action.

When the operation illustrated in FIG. 5 starts, the control unit 40 of the first power transmission device 10 determines whether communication with the communication unit 121 of at least one electronic device 100 is possible (step S1). Here, it is assumed that the electronic device 100 determined in step S1 whether communication is possible or not can receive the first radio wave R1 transmitted from the first power transmission device 10. That is, in step S1, it is determined whether or not the first power transmission device 10 can communicate with any one of the electronic devices 100 that can receive the first radio wave R1 transmitted from the first power transmission device 10.

For example, in FIG. 4, the electronic devices 100A, 100B, 100C, and 100D located in the first range A1 are the electronic devices 100 capable of receiving the first radio wave R1 transmitted from the first power transmission device 10. In this case, in step S1, the control unit 40 of the first power transmission device 10 determines whether communication with any one of the electronic devices 100A, 100B, 100C, and 100D is possible.

For example, when the communicable range of the first power transmission device 10 is the same as the first range A1 to which power can be transmitted from the first power transmission device 10, the first power transmission device 10 includes the electronic devices 100A, 100B, 100C, and 100D. Both can communicate. On the other hand, when the communicable range of the first power transmission device 10 is not the same as the first range A1 to which power can be transmitted from the first power transmission device 10, the first power transmission device 10 is any of the electronic devices 100A, 100B, 100C, 100D. Even communication is not always possible.

When it is not determined in step S1 that any electronic device 100 can communicate, the control unit 40 of the first power transmission device 10 repeats the process of step S1. That is, in this case, the control unit 40 of the first power transmission device 10 stands by until it is determined that communication with any electronic device 100 is possible. On the other hand, when it is determined in step S1 that communication with any one of the electronic devices 100 is possible, the control unit 40 of the first power transmission device 10 performs the process of step S2.

In step S2, the control unit 40 of the first power transmission device 10 communicates with the electronic device 100 determined to be communicable in step S1, and the electronic device 100 can receive the second radio wave R2 from the second power transmission device 20. It is determined whether or not. The electronic device 100 determined to be communicable in step S1 can receive the first radio wave R1 transmitted from the first power transmission device 10 as described above. In step S2, it is determined whether such an electronic device 100 can also receive the second radio wave R2 transmitted from the second power transmission device 20. That is, in step S2, the electronic device 100 with which the first power transmission device 10 has communicated is transmitted by the plurality of power transmission devices (the first power transmission device 10 and the second power transmission device 20). And it is determined whether the second radio wave R2) can be received.

For example, when the first power transmission apparatus 10 can communicate with the electronic devices 100C and 100D illustrated in FIG. 4, the electronic devices 100C and 100D are included in both the first range A1 and the second range A2. Therefore, in this case, in step S2, each of the electronic devices 100C and 100D receives the plurality of radio waves (the first radio wave R1 and the first radio wave R1) transmitted from the plurality of power transmission devices (the first power transmission device 10 and the second power transmission device 20). It is determined that the two radio waves R2) can be received. On the other hand, for example, when the first power transmission device 10 can communicate with the electronic devices 100A and 100B shown in FIG. 4, the electronic devices 100A and 100B are included in the first range A1, but in the second range A2. Not included Therefore, in this case, in step S2, each of the electronic devices 100A and 100B is configured to transmit the plurality of radio waves (the first radio wave R1 and the first radio wave R1) transmitted from the plurality of power transmission devices (the first It is not determined that the two radio waves R2) can be received.

Further, in step S2, the first power transmission apparatus 10 may exchange various types of information by communicating with the electronic device 100 determined to be communicable in step S1. For example, the first power transmission device 10 and the electronic device 100 may exchange positional information and the like with each other. Also, for example, the electronic device 100 may notify the first power transmission device 10 of the number of radio waves transmitted from the power transmission device. That is, in this case, the electronic device 100 notifies the first power transmission device 10 how many radio waves transmitted from the power transmission device can be received.

When it is determined in step S2 that the electronic device 100 can also receive the second radio wave R2, the control unit 40 of the first power transmission device 10 performs the process of step S3. In step S3, the control unit 40 of the first power transmission device 10 first receives the information on the second radio wave R2 from the electronic device 100 that has communicated in step S2. Since the electronic device 100 that has communicated with the first power transmission device 10 in step S2 can receive the second radio wave R2 from the second power transmission device 20, various pieces of information on the second radio wave R2 can be used as the information on the second radio wave R2. It can be acquired. Here, the information of the second radio wave R2 includes, for example, the frequency of the second radio wave R2, the arrival direction of the second radio wave R2, the directivity of the second radio wave R2, the radio wave intensity of the second radio wave R2, and / or The amount of power of the power transmitted by the two radio waves R2 may be used as various information on the second radio wave R2.

In step S3, the control unit 40 of the first power transmission device 10 next controls an aspect of performing power transmission from the first power transmission device 10 by the first radio wave R1, based on the received information of the second radio wave R2. Here, in the control of the aspect in which power transmission is performed by the first radio wave R1, when the electronic device 100 can receive the first radio wave R1 and the second radio wave R2, the strengths of the radio waves of the first radio wave R1 and the second radio wave R2 are It is a control performed to prevent it from becoming too high. Specifically, the control of the aspect in which power transmission is performed by the first radio wave R1 includes, for example, turning on / off of power transmission by the first radio wave R1, reducing the output of the radio wave intensity of the first radio wave R1, and transmitting power Various control can be performed such as reduction of the amount, change of the directivity of the first radio wave R1, change of the frequency of the first radio wave R1, and the like. Some of the representative examples of such control will be described further below.

If the mode of performing power transmission is controlled by the first radio wave R1 in step S3, the control unit 40 of the first power transmission device 10 causes the first power transmission device 10 to start transmission of the first radio wave R1 in a controlled manner. The power transmission unit 50 and / or the amplifier 52 are controlled (step S4). Thereby, the first power transmission apparatus 10 can perform power transmission to the at least one electronic device 100, for example, by the first radio wave R1 whose output is controlled. Then, at least one electronic device 100 transmitted from the first power transmission apparatus 10 can receive the first radio wave R1 whose output is controlled.

On the other hand, when it is determined in step S2 that the electronic device 100 can not receive the second radio wave R2, the control unit 40 of the first power transmission device 10 performs the process of step S4 without performing the process of step S3. That is, in step S4, the control unit 40 of the first power transmission device 10 transmits the power of the first radio wave R1 without starting the transmission of the first radio wave R1. 50 and / or the amplifier 52 are controlled. In this case, in step S4, the control unit 40 of the first power transmission device 10 transmits power of the first power transmission device 10 so that transmission is started in a (normal) power transmission mode of the first radio wave R1 determined in advance. The unit 50 and / or the amplifier 52 are controlled. Thereby, the first power transmission apparatus 10 can perform power transmission to, for example, at least one electronic device 100 without controlling the mode of power transmission by the first radio wave R1, that is, by the original first radio wave R1. . And at least one electronic device 100 transmitted from the first power transmission apparatus 10 can receive the first radio wave R1 in a state where the mode of power transmission by the first radio wave R1 is not controlled.

As described above, in the embodiment, when the electronic device 100 can receive the first radio wave R1 and the second radio wave R2, the control unit 40 of the first power transmission device 10 performs the first power transmission device based on the information on the second radio wave R2. 1 Control the mode of transmitting power by radio wave R1.

For this reason, according to the first power transmission device 10 according to an embodiment, even if radio waves transmitted from a plurality of power transmission devices can be received as in the electronic devices 100C and 100D shown in FIG. Thus, the possibility of the radio wave intensity becoming high is reduced. Therefore, according to the first power transmission device 10 according to the embodiment, the concern about the reduction in the power transmission efficiency, the communication failure, and the like is reduced. According to the first power transmission apparatus 10 according to an embodiment, it is possible to expect to reduce waste from the viewpoint of resources such as power to be transmitted and / or radio waves used for power transmission. As described above, according to the first power transmission device 10 according to the embodiment, improvement in the efficiency of power transmission can be expected. Therefore, according to the 1st power transmission device 10 concerning one embodiment, the convenience of a power transmission system can be improved.

In the above, the example in the case of controlling the aspect of the electromagnetic wave transmitted to the electronic device 100 from the 1st power transmission apparatus 10 was demonstrated by the control which the 1st power transmission apparatus 10 performs. On the other hand, as described above, the second power transmission device 20 may perform the above control.

By the way, as described above, when at least one of the first power transmission device 10 and the second power transmission device 20 moves, the relationship between the reach of the radio waves transmitted from the first power transmission device 10 and the second power transmission device 20 changes easily. Do. In addition, even if the electronic device 100 moves, the relative positions of the first power transmission device 10 and the second power transmission device 20 change. In such a case, the determination result as to whether or not the electronic device 100 can receive the radio wave transmitted from at least one of the first power transmission device 10 and the second power transmission device 20 may also change. Further, the determination result as to whether or not the electronic device 100 can communicate with at least one of the first power transmission device 10 and the second power transmission device 20 may also change.

Therefore, in one embodiment, the first power transmission device 10 may periodically and repeatedly perform the process as illustrated in FIG. 5. Further, in one embodiment, the first power transmission device 10 may detect the change in the position of at least one of the first power transmission device 10, the second power transmission device 20, and the electronic device 100, as shown in FIG. Processing as shown in 5 may be performed. A change in the position of the first power transmission device 10, the second power transmission device 20, and the electronic device 100 is detected by at least one of the first power transmission device 10, the second power transmission device 20, and the electronic device 100, and the detection result May be transmitted to the first power transmission apparatus 10. Since various known techniques can be used for position detection in this case, more detailed description will be omitted.

Thus, in one embodiment, when the position of at least one of the first power transmission device 10, the second power transmission device 20, and the electronic device 100 changes, the first power transmission device 10 transmits power by the first radio wave R1. Aspects may be controlled.

According to the first power transmission device 10 according to the embodiment, the first power transmission device 10 transmits power even if the position of at least one of the first power transmission device 10, the second power transmission device 20, and the electronic device 100 changes. It is controlled such that appropriate power transmission is performed as a whole of the system 1. Therefore, according to the 1st power transmission device 10 concerning one embodiment, the convenience of a power transmission system can be improved.

By the way, when the control performed in step S3 of FIG. 5 is simultaneously performed in the first power transmission device 10 and the second power transmission device 20, depending on the arrangement of each other, it is output from both the first power transmission device 10 and the second power transmission device 20. In some cases, the output of radio waves may be reduced. In such a case, in the electronic device 100 that receives power from the first power transmission device 10 and / or the second power transmission device 20 by radio waves, the necessary power may not be received.

Therefore, in such a case, the first power transmission device 10 and the second power transmission device 20 may have predetermined priorities. The priority relation thus determined in advance may be stored, for example, in the storage unit 42 of the first power transmission device 10 and / or the second power transmission device 20. In this case, for example, in the first power transmission device 10, it is assumed that a higher priority than the second power transmission device 20 is predetermined. Further, as described above, in step S3, it is assumed that both of the first power transmission device 10 and the second power transmission device 20 can control an aspect in which power transmission is performed by radio waves. In this case, in the first power transmission apparatus 10 with high priority, control of the aspect of performing power transmission by radio waves may not be performed. On the other hand, in this case, in the second power transmission apparatus 20 with low priority, control is performed such that power is transmitted by radio waves. Moreover, when the predetermined priority is reverse, the power transmission apparatus which does not perform control of the aspect which performs power transmission with an electromagnetic wave, and the power transmission apparatus which performs control of the aspect which performs power transmission with an electromagnetic wave are reverse.

According to the first power transmission device 10 according to an embodiment, even if control is performed independently in each of the plurality of power transmission devices, each of the plurality of power transmission devices is controlled such that appropriate power transmission is performed as a whole Be done. Therefore, according to the 1st power transmission device 10 concerning one embodiment, the convenience of a power transmission system can be improved.

Hereinafter, some representative examples of the control performed in step S3 shown in FIG. 5 will be described.
Hereinafter, an example at the time of controlling an aspect which performs power transmission by the 1st electric wave R1 in Step S3 shown in Drawing 5 is explained.

(One embodiment)
FIG. 6 is a flowchart for explaining an example of control performed in step S3 shown in FIG. 6 shows a plurality of radio waves (first radio waves R1 and R1) transmitted by the electronic device 100 from the plurality of power transmission devices (the first power transmission device 10 and the second power transmission device 20) in step S2 of the flowchart shown in FIG. A process performed when it is determined that the second radio wave R2) can be received is shown.

When the process shown in FIG. 6 starts, the control unit 40 of the first power transmission device 10 determines whether the amount of power transmission by the second radio wave R2 transmitted from the second power transmission device 20 is larger than a predetermined value. (Step S11). Here, the amount of power transmission of the second radio wave R2 transmitted from the second power transmission apparatus 20 may be received as information of the second radio wave R2 from the electronic device 100 communicated in step S2 shown in FIG. Further, the control unit 40 of the first power transmission device 10 may store, for example, the power amount of the power transmission by the second radio wave R2 received in this manner in the storage unit 42. Further, the predetermined value of the amount of power to be compared at the time of the determination in step S11 may be stored in the storage unit 42 in advance appropriately set. Moreover, the control part 40 of the 1st power transmission apparatus 10 may calculate such a predetermined value suitably.

Further, in another example of step S11, the amount of power transmission of the second radio wave R2 transmitted from the second power transmission device 20 and the amount of power transmission of the first radio wave R1 transmitted from the first power transmission device 10 It may be determined whether or not the sum of is larger than a predetermined value.

When the amount of power transmission by the second radio wave R2 is larger than the predetermined value in step S11, the control unit 40 of the first power transmission device 10 reduces the amount of power that the first power transmission device 10 transmits by the first radio wave R1. (Step S12). In step S12, for example, the control unit 40 may control the power transmission unit 50 and / or the amplifier 52 so as to reduce the amount of power transmitted from the power transmission antenna 54 by the first radio wave R1.

Here, for example, when the amount of power transmission by the second radio wave R2 is larger than a predetermined value, the control unit 40 may reduce the amount of power transmitted by the first radio wave R1 by a predetermined degree. . In this case, the correlation between the predetermined value of the electric energy and the degree to which the electric energy of the electric power transmitted by the first radio wave R1 is reduced may be stored in advance in the storage unit 42 or externally by the receiving unit 61B or the like. It may be received from a server or the like. The correlation may be calculated by the control unit 40 from the amount of power transmission by the second radio wave R <b> 2 based on a predetermined arithmetic expression.

Further, in step S12, the control unit 40 determines the extent to which the amount of power of the power transmitted by the first radio wave R1 is reduced according to the extent to which the amount of power transmission by the second radio wave R2 exceeds the predetermined value. It is also good.

On the other hand, when the amount of power transmission by the second radio wave R2 is not larger than the predetermined value in step S11, the control unit 40 of the first power transmission device 10 ends the process shown in FIG. 6 without performing the process of step S12. Do.

Thus, in one embodiment, when the electronic device 100 can receive the first radio wave R1 and the second radio wave R2, the amount of power transmitted by the second radio wave R2 is greater than a predetermined value in the first power transmission device 10 When it is large, the aspect of transmitting power by the first radio wave R1 may be controlled. Further, in this case, when the electronic device 100 can receive the first radio wave R1 and the second radio wave R2, the first power transmission device 10 may control to reduce the amount of power transmission by the first radio wave R1.

According to the first power transmission device 10 according to an embodiment, when the amount of power transmitted by the second radio wave R2 is larger than a predetermined value, that is, relatively large, the amount of power transmission by the first radio wave R1 is reduced. On the other hand, according to the first power transmission device 10 according to one embodiment, when the amount of power transmitted by the second radio wave R2 is not larger than a predetermined value, that is, relatively large, the amount of power transmission by the first radio wave R1 is I will not lower it.

For this reason, according to the first power transmission device 10 according to an embodiment, even when radio waves transmitted from a plurality of power transmission devices can be received as in the electronic device 100C shown in FIG. Thus, the possibility of the radio wave intensity becoming high is reduced. Therefore, according to the first power transmission device 10 according to the embodiment, the concern about the reduction in the power transmission efficiency, the communication failure, and the like is reduced. According to the first power transmission apparatus 10 according to an embodiment, it is possible to expect to reduce waste from the viewpoint of resources such as power to be transmitted and / or radio waves used for power transmission. As described above, according to the first power transmission device 10 according to the embodiment, improvement in the efficiency of power transmission can be expected. Therefore, according to the 1st power transmission device 10 concerning one embodiment, the convenience of a power transmission system can be improved. Furthermore, in the power transmission system 1 according to the embodiment, the first power transmission device 10 and the second power transmission device 20 do not perform direct communication. Therefore, according to the power transmission system 1 according to an embodiment, the convenience of the power transmission system can be obtained even when the first power transmission device 10 and the second power transmission device 20 can not communicate wirelessly (for example, due to isolation). Can be enhanced.

In the above, the example in the case of reducing the output of the electromagnetic wave transmitted from the 1st power transmission apparatus 10 was demonstrated by the control which the 1st power transmission apparatus 10 performs. On the other hand, as described above, the second power transmission device 20 may perform the above control.

In addition, for simplifying the example illustrated in FIG. 6, for example, the process illustrated in step S11 may be skipped. That is, when the electronic device 100 can receive a plurality of radio waves transmitted from a plurality of power transmission devices in step S2 shown in FIG. 5, the power of power transmission by the first radio wave R1 as in step S12 shown in FIG. The amount may be reduced.

(One embodiment)
FIG. 7 is a flow chart for explaining another example of control performed in step S3 shown in FIG. Also in FIG. 7, in step S2 of the flowchart illustrated in FIG. 5, the electronic device 100 transmits a plurality of radio waves (first radio wave R1 and a plurality of radio waves R1 and A process performed when it is determined that the second radio wave R2) can be received is shown. Hereinafter, the description of the same contents as or the contents of the same contents as the description in FIG. 6 will be simplified or omitted as appropriate.

When the process shown in FIG. 7 starts, the control unit 40 of the first power transmission device 10 performs the same process as step S11 shown in FIG. In addition, as a simpler example, for example, the process shown in step S11 may be skipped as in the case shown in FIG.

When the amount of power transmission by the second radio wave R2 is larger than the predetermined value in step S11, the control unit 40 of the first power transmission device 10 changes the directivity of the first radio wave R1 transmitted from the first power transmission device 10 ( Step S22). Therefore, in one embodiment, the power transmission antenna 54 provided in the first power transmission device 10 may be configured by, for example, an array antenna. Further, in this case, the control unit 40 of the first power transmission device 10 controls the directivity of the first radio wave R1 transmitted from the power transmission antenna 54 (array antenna) so as to be changed by a technique such as beam forming. Specifically, the control unit 40 may appropriately control at least one of the power transmission unit 50, the amplifier 52, and the power transmission antenna 54.

For example, in step S22, the control unit 40 may change the directivity of the first radio wave R1 so that the output of the first radio wave R1 corresponding to the direction of the electronic device 100 is reduced. In this case, the control unit 40 of the first power transmission device 10 may first determine the arrival direction of the radio wave transmitted from the electronic device 100 by following the path of the radio wave of communication transmitted from the electronic device 100. The control unit 40 may also determine the direction of the electronic device 100 based on the information acquired from the electronic device 100 in step S2. When the direction of the electronic device 100 is determined, the control unit 40 sets at least one of the power transmission unit 50, the amplifier 52, and the power transmission antenna 54 such that the output of the first radio wave R1 in the direction corresponding to that direction is reduced. Control. Thus, in step S22, the control unit 40 changes the directivity of the first radio wave R1 transmitted from the first power transmission device 10. Various known techniques may be used to change the directivity of radio waves by beamforming or the like using an array antenna. For this reason, more detailed description is omitted.

Here, for example, when the direction of the electronic device 100 is determined, the control unit 40 may determine the directivity of the first radio wave R1 to the directivity defined in advance. At the time of such determination, the correlation between the determined direction of the electronic device 100 and the direction and / or the degree of changing the directivity of the first radio wave R1 may be stored in the storage unit 42 in advance. , And may be received from an external server or the like by the receiving unit 61B or the like. The correlation may be calculated by the control unit 40 from the determined direction of the electronic device 100 based on a predetermined arithmetic expression.

On the other hand, when the amount of power transmission by the second radio wave R2 is not larger than the predetermined value in step S11, the control unit 40 of the first power transmission device 10 ends the process shown in FIG. 6 without performing the process of step S12. Do.

Thus, in one embodiment, the first power transmission apparatus 10 may change the directivity of the first radio wave R1 when the electronic device 100 can receive the first radio wave R1 and the second radio wave R2. In this case, the first power transmission apparatus 10 may change the directivity of the first radio wave R1 so that the output of the first radio wave R1 corresponding to the direction of the electronic device 100 is reduced.

According to the first power transmission device 10 according to one embodiment, when the amount of power transmitted by the second radio wave R2 is larger than a predetermined value, ie, relatively large, the directivity of the first radio wave R1 is changed. On the other hand, according to the first power transmission device 10 according to one embodiment, the directivity of the first radio wave R1 is not changed when the amount of power transmitted by the second radio wave R2 is not larger than a predetermined value, that is, relatively large. .

For this reason, according to the first power transmission device 10 according to an embodiment, even when radio waves transmitted from a plurality of power transmission devices can be received as in the electronic device 100C shown in FIG. Thus, the possibility of the radio wave intensity becoming high is reduced. Therefore, according to the first power transmission device 10 according to the embodiment, the concern about the reduction in the power transmission efficiency, the communication failure, and the like is reduced. According to the first power transmission apparatus 10 according to an embodiment, it is possible to expect to reduce waste from the viewpoint of resources such as power to be transmitted and / or radio waves used for power transmission. As described above, according to the first power transmission device 10 according to the embodiment, improvement in the efficiency of power transmission can be expected. Therefore, according to the 1st power transmission device 10 concerning one embodiment, the convenience of a power transmission system can be improved. Furthermore, in the power transmission system 1 according to the embodiment, the first power transmission device 10 and the second power transmission device 20 do not perform direct communication. Therefore, according to the power transmission system 1 according to an embodiment, the convenience of the power transmission system can be obtained even when the first power transmission device 10 and the second power transmission device 20 can not communicate wirelessly (for example, due to isolation). Can be enhanced.

In the above, the example in the case of reducing the output of the electromagnetic wave transmitted from the 1st power transmission apparatus 10 was demonstrated by the control which the 1st power transmission apparatus 10 performs. On the other hand, as described above, the second power transmission device 20 may perform the above control.

(One embodiment)
FIG. 8 is a flow chart for explaining another example of control performed in step S3 shown in FIG. Also in FIG. 8, in step S2 of the flowchart illustrated in FIG. 5, the electronic device 100 transmits a plurality of radio waves (first radio wave R1 and a plurality of radio waves R1 and A process performed when it is determined that the second radio wave R2) can be received is shown. Hereinafter, the description of the same content or the content of the same content as the description in FIG. 6 or FIG. 7 will be simplified or omitted as appropriate.

When the process shown in FIG. 8 starts, the control unit 40 of the first power transmission device 10 performs the same process as step S11 shown in FIG. In addition, as a simpler example, for example, the process shown in step S11 may be skipped as in the case shown in FIG.

If the amount of power transmission by the second radio wave R2 is larger than the predetermined value in step S11, the process of step S32 is performed. In step S32, if the control unit 40 of the first power transmission device 10 has a frequency of the first radio wave R1 transmitted from the first power transmission device 10 different from the frequency of the second radio wave R2 transmitted by the power transmission unit of the second power transmission device 20. Let For example, in step S32, when the frequency of the first radio wave R1 and the frequency of the second radio wave R2 are both N Hz, the control unit 40 sets the frequency of the first radio wave R1 to other than N Hz. Set to frequency. Here, frequencies other than N [Hz] set as the frequency of the first radio wave R1 may be defined in advance and stored in the storage unit 42.

In order to perform the process of step S32, the control unit 40 of the first power transmission device 10 may determine the frequency of the second radio wave R2. In addition, the control unit 40 may determine the frequency of the second radio wave R2 based on the information acquired from the electronic device 100 in step S2 illustrated in FIG. In addition, the frequency of the second radio wave R2 may be received as information of the second radio wave R2 from the electronic device 100 communicated in step S2 shown in FIG. When the frequency of the second radio wave R2 is determined, the control unit 40 determines whether the frequency of the second radio wave R2 is different from the frequency of the first radio wave R1. When the frequency of the second radio wave R2 is the same as the frequency of the first radio wave R1, the control unit 40 changes the frequency of the first radio wave R1. In this case, the control unit 40 sets the frequency of the first radio wave R1 to be different from the frequency of the second radio wave R2. On the other hand, when the frequency of the second radio wave R2 is different from the frequency of the first radio wave R1, the control unit 40 does not change the setting of the frequency of the first radio wave R1. When making the frequency of a plurality of radio waves different, various known techniques may be used. For this reason, more detailed description is omitted.

On the other hand, when the amount of power transmission by the second radio wave R2 is not larger than the predetermined value in step S11, the control unit 40 of the first power transmission device 10 ends the process shown in FIG. 6 without performing the process of step S12. Do.

Thus, in one embodiment, when the electronic device 100 can receive the first radio wave R1 and the second radio wave R2, if the first power transmission device 10 has a frequency of the first radio wave R1 different from that of the second radio wave R2. You may

According to the first power transmission device 10 according to one embodiment, when the amount of power transmitted by the second radio wave R2 is larger than a predetermined value, ie, relatively large, the frequency of the first radio wave R1 is set to the frequency of the second radio wave R2. Make it different. On the other hand, according to the first power transmission device 10 according to an embodiment, when the amount of power transmitted by the second radio wave R2 is not larger than a predetermined value, that is, relatively large, the frequency of the first radio wave R1 is set to the second radio wave. Not different from the frequency of R2.

For this reason, according to the first power transmission device 10 according to an embodiment, even when radio waves transmitted from a plurality of power transmission devices can be received as in the electronic device 100C shown in FIG. Thus, the possibility of the radio wave intensity becoming high is reduced. Therefore, according to the first power transmission device 10 according to the embodiment, the concern about the reduction in the power transmission efficiency, the communication failure, and the like is reduced. According to the first power transmission apparatus 10 according to an embodiment, it is possible to expect to reduce waste from the viewpoint of resources such as power to be transmitted and / or radio waves used for power transmission. As described above, according to the first power transmission device 10 according to the embodiment, improvement in the efficiency of power transmission can be expected. Therefore, according to the 1st power transmission device 10 concerning one embodiment, the convenience of a power transmission system can be improved. Furthermore, in the power transmission system 1 according to the embodiment, the first power transmission device 10 and the second power transmission device 20 do not perform direct communication. Therefore, according to the power transmission system 1 according to an embodiment, the convenience of the power transmission system can be obtained even when the first power transmission device 10 and the second power transmission device 20 can not communicate wirelessly (for example, due to isolation). Can be enhanced.

In the above, the example in the case of reducing the output of the electromagnetic wave transmitted from the 1st power transmission apparatus 10 was demonstrated by the control which the 1st power transmission apparatus 10 performs. On the other hand, as described above, the second power transmission device 20 may perform the above control.

Also in each of the embodiments described above, the priority relationship between the first power transmission device 10 and another power transmission device such as the second power transmission device 20 may be determined in advance. The power transmission unit 50 of the first power transmission device 10 transmits power by the first radio wave R1 based on the priority defined between the first power transmission device 10 and another power transmission device such as the second power transmission device 20, for example. Control the manner in which the

Although the present disclosure has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various changes or modifications based on the present disclosure. Therefore, it should be noted that these variations or modifications are included in the scope of the present disclosure. For example, the functions included in each functional unit can be rearranged so as not to be logically contradictory. A plurality of functional units may be combined or divided into one. The embodiments according to the present disclosure described above are not limited to the implementation according to each of the embodiments described respectively, and may be implemented by combining the features or omitting some of them as appropriate. .

For example, in the embodiment described above, an example in which the power transmission system 1 includes two power transmission devices, such as the first power transmission device 10 and the second power transmission device 20 has been described. However, in one embodiment, the power transmission system 1 may include the third power transmission device 30, as shown in FIG. In this case, the third power transmission device 30 transmits power to the at least one electronic device 100 by the third radio wave R3. Also in the power transmission system 1 as shown in FIG. 9, when the electronic device 100 can receive the first radio wave R1, the second radio wave R2, and the third radio wave R3 in step S2 of FIG. Control may be performed in the same manner as shown in step S3 of FIG. In this case, in step S3 shown in FIG. 5, the first power transmission device 10 controls the mode in which power is transmitted by the first radio wave R1 based on the information on the second radio wave R2 and the information on the third radio wave R3. Good.

Thus, in one embodiment, the power transmission system 1 may include the third power transmission device 30 that transmits power to the electronic device 100 by the third radio wave R3. In this case, when the electronic device 100 can receive the first radio wave R1, the second radio wave R2, and the third radio wave R3, the first power transmission device 10 is based on the information on the second radio wave R2 and the information on the third radio wave R3. It is also possible to control an aspect in which power transmission is performed by the first radio wave R1. According to the power transmission system 1 according to one embodiment, even if control is performed independently in each of three or more power transmission devices, each of the three or more power transmission devices performs appropriate power transmission as a whole Controlled by Therefore, according to the power transmission system 1 which concerns on one Embodiment, the convenience of a power transmission system can be improved.

Moreover, the embodiment described above is not limited to the implementation as the power transmission system 1. The embodiment described above may be implemented, for example, as a power transmission device such as the first power transmission device 10 or the second power transmission device 20 included in the power transmission system 1. In particular, the above-described embodiment may be implemented by, for example, a power transmission device (independently) such as the first power transmission device 10 included in the power transmission system 1. Also, the embodiment described above may be implemented as a program executed by a power transmission device such as the first power transmission device 10 or the second power transmission device 20 included in the power transmission system 1, for example. Also, the above-described embodiment may be implemented as an electronic device such as at least one electronic device 100 included in the power transmission system 1, for example. Furthermore, the embodiment described above may be implemented, for example, as a power transmission method of a power transmission device such as the first power transmission device 10 or the second power transmission device 20 included in the power transmission system 1.

DESCRIPTION OF SYMBOLS 1 1 power transmission system 10 1st power transmission apparatus 20 2nd power transmission apparatus 30 3rd power transmission apparatus 40 control part 42 storage part 50 power transmission part 52 amplifier 54 power transmission antenna 60 communication part 61A transmission part 61B receiving part 62 amplifier 64 communication antenna 100A-100E electronic Device 120 Power receiving unit 120A Power receiving antenna 120B Rectifier circuit 121 Communication unit 130 Storage unit 131 Control unit 140 Power storage unit

Claims (10)

1. The first power transmission device performs power transmission by the first radio wave;
   The second power transmission apparatus performs power transmission by the second radio wave;
   Enabling an electronic device to receive at least one of the first radio wave and the second radio wave;
   The first power transmission apparatus controls an aspect of performing power transmission by the first radio wave based on information on the second radio wave when the electronic device can receive the first radio wave and the second radio wave; ,
   Power transmission methods, including:
2. The first power transmission apparatus transmits power by the first radio wave when the amount of power transmitted by the second radio wave is larger than a predetermined value when the electronic device can receive the first radio wave and the second radio wave. The power transmission method according to claim 1, which controls an aspect of performing.
3. 3. The power transmission method according to claim 1, wherein the first power transmission device reduces the amount of power for power transmission by the first radio wave when the electronic device can receive the first radio wave and the second radio wave.
4. The power transmission method according to claim 1 or 2, wherein the first power transmission apparatus changes the directivity of the first radio wave when the electronic device can receive the first radio wave and the second radio wave.
5. The power transmission method according to claim 4, wherein the first power transmission device changes the directivity of the first radio wave such that the output of the first radio wave corresponding to the direction of the electronic device is reduced.
6. The said 1st power transmission apparatus makes the frequency of a said 1st electromagnetic wave different from the frequency of a said 2nd electromagnetic wave, when the said electronic device can receive the said 1st electromagnetic wave and a said 2nd electromagnetic wave. Power transmission method.
7. The first power transmission device controls an aspect of performing power transmission by the first radio wave, when the position of at least one of the first power transmission device, the second power transmission device, and the electronic device changes. The power transmission method according to any one of 6.
8. The third power transmission device includes the step of transmitting power to the electronic device by the third radio wave,
   When the electronic device can receive the first radio wave, the second radio wave, and the second radio wave, the first power transmission device is configured based on the information on the second radio wave and the information on the third radio wave. The power transmission method according to any one of claims 1 to 7, wherein an aspect of performing power transmission by the first radio wave is controlled.
9. An electronic device that receives at least one of a first radio wave transmitting power transmission from a first power transmission device and a second radio wave transmitting power transmission from a second power transmission device,
   The electronic device transmits information on the second radio wave to the first power transmission device and requests power transmission by the first radio wave to the first power transmission device when the first radio wave and the second radio wave can be received.
10. A power transmission device for transmitting power to at least one electronic device by a first radio wave, comprising:
    When the electronic device is capable of receiving the first radio wave and the second radio wave transmitting power transmission from the other power transmission device, control is performed on the aspect of performing power transmission by the first radio wave based on the information on the second radio wave. , Power transmission device.

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