JP2012095435A - Power supply device and power supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To permit a power supply device to appropriately supply power to an electronic apparatus.SOLUTION: The power supply device transmits power to an electronic apparatus on which a battery is mounted without contact. The power supply device includes: first communication means transmitting prescribed power for charging the battery to the electronic apparatus; second communication means receiving data transmitted from the electronic apparatus; and control means transmitting the prescribed power to the electronic apparatus and preventing data from being received from the electronic apparatus when the electronic apparatus does not have the prescribed data which is not transmitted to the power supply device. When the electronic apparatus has the prescribed data, the control means transmits a command for requesting the prescribed data to the electronic apparatus, transmits the prescribed power to the electronic apparatus and receives the prescribed data from the electronic apparatus.

Description

  The present invention relates to a power supply apparatus and a power supply system that perform power supply in a non-contact manner.

  2. Description of the Related Art In recent years, a power feeding system is known that includes a power feeding device that transmits power in a contactless manner without being connected by a connector, and an electronic device that charges a battery mounted by the power transmitted from the power feeding device. In such a non-contact power supply system, a power supply apparatus that supplies power to an electronic device by using an electromagnetic resonance phenomenon is known (Patent Document 1).

JP 2010-063245 A

Conventionally, although it has been disclosed that the power supply apparatus selects an electronic device that is a specific power supply destination from a plurality of power supply destinations, it has not been disclosed how to supply power to the selected electronic device. . Further, it has not been disclosed how the power supply apparatus selects a specific power supply destination for the electronic device.
For this reason, the power supply apparatus cannot perform appropriate power supply to each electronic device.
In view of the above, an object of the present invention is to allow the power supply apparatus to perform appropriate power supply to the electronic device.

  A power supply apparatus according to the present invention is a power supply apparatus that transmits electric power to an electronic device equipped with a battery in a contactless manner, and transmits a predetermined electric power for charging the battery to the electronic device. A communication means, a second communication means for receiving data transmitted from the electronic device, and determining whether the electronic device has predetermined data that the electronic device has not transmitted to the power supply device When the first determination unit and the electronic device do not have the predetermined data, the first communication unit is controlled to transmit the predetermined power to the electronic device, and the electronic device Control means for controlling the second communication means so as not to receive data from the electronic device, and when the electronic device has the predetermined data, the control means uses a command for requesting the predetermined data. The electronic The second communication means to control the first communication means to transmit the predetermined power to the electronic device and to receive the predetermined data from the electronic device. It is characterized by controlling.

  The power supply system according to the present invention is a power supply system including an electronic device in which a battery is mounted and a power supply device that transmits power to the electronic device in a contactless manner, and the power supply device charges the battery. First communication means for transmitting predetermined power for transmission to the electronic device, second communication means for receiving data transmitted from the electronic device, and predetermined not transmitted by the electronic device to the power supply device First determination means for determining whether or not the electronic device has the data, and when the electronic device does not have the predetermined data, the predetermined power is transmitted to the electronic device. Control means for controlling the first communication means and controlling the second communication means so as not to receive data from the electronic device, and when the electronic device has the predetermined data, Control means Transmitting a command for requesting the predetermined data to the electronic device, controlling the first communication means to transmit the predetermined power to the electronic device, and from the electronic device to the predetermined data The second communication means is controlled to receive the data of the electronic device, and the electronic device has means for charging the battery according to the predetermined power received from the power supply device. To do.

  ADVANTAGE OF THE INVENTION According to this invention, this invention can make an electric power feeding apparatus perform appropriate electric power feeding with respect to an electronic device.

1 is a block diagram illustrating an example of a power feeding system in Embodiment 1. FIG. 3 is a diagram illustrating an example of a configuration of a matching circuit 103 of the power supply apparatus 100 according to the first embodiment. 3 is a flowchart illustrating an example of detection processing performed by the power supply apparatus 100 according to the first embodiment. 6 is a flowchart illustrating an example of a selection process performed by the power supply apparatus 100 according to the first embodiment. 6 is a flowchart illustrating an example of a power supply mode selection process performed by the power supply apparatus according to the first embodiment. FIG. 3 is a diagram illustrating an example of state transition of the power supply apparatus 100 according to the first embodiment. 6 is a flowchart illustrating an example of a command reception process performed by the electronic device 200 according to the first embodiment. 6 is a flowchart illustrating an example of a command reception process performed by the electronic device 200 according to the first embodiment. 6 is a flowchart illustrating an example of a command reception process performed by the electronic device 200 according to the first embodiment. 6 is a flowchart illustrating an example of error processing performed by the electronic device 200 according to the first embodiment. It is the figure which showed an example of the state transition of the electronic device 200 in Example 1. FIG.

[Example 1]
Hereinafter, Example 1 of the present invention will be described in detail with reference to the drawings. The power supply system according to the first embodiment includes a power supply apparatus 100 and an electronic device 200 as illustrated in FIG. The power supply apparatus 100 includes a power supply antenna 108 for supplying power to the electronic device 200 in a contactless manner. The electronic apparatus 200 includes a power reception antenna 201 for receiving power supplied from the power supply apparatus 100 in a contactless manner. Have.

  The power feeding apparatus 100 transmits power to the electronic device 200 through the power feeding antenna 108 in a contactless manner. The electronic device 200 charges the battery 210 connected to the electronic device 200 according to the electric power transmitted from the power supply apparatus 100 via the power receiving antenna 201 in a contactless manner. Note that the power supply apparatus 100 can transmit power without contact even when there are two or more electronic devices 200.

  The electronic device 200 may be a digital still camera, a mobile phone with a camera, a digital video camera, a music player, or the like as long as it is a device that operates with the power supplied from the battery 210.

  Note that the power supply system according to the first embodiment may be a system in which the power supply apparatus 100 transmits power to the electronic device 200 by electromagnetic induction, and the electronic device 200 receives power from the power supply apparatus 100 by electromagnetic induction. In addition, the power supply device 100 may transmit power to the electronic device 200 by electromagnetic resonance, and the electronic device 200 may receive power from the power supply device 100 by electromagnetic resonance.

  The electronic apparatus 200 according to the first embodiment can receive power from the power supply apparatus 100 when the distance between the power supply apparatus 100 and the electronic apparatus 200 is within a predetermined range. In addition, electronic device 200 cannot receive power from power supply device 100 when the distance between power supply device 100 and electronic device 200 does not exist within a predetermined range. The predetermined range is a range in which the power supply apparatus 100 and the electronic device 200 can communicate with each other.

  The power supply apparatus 100 includes an oscillator 101, a power transmission circuit 102, a matching circuit 103, a modulation / demodulation circuit 104, a CPU 105, a ROM 106, a RAM 107, a power supply antenna 108, a timer 109, a recording / reproducing unit 110, a conversion unit 111, a communication unit 112, and a display unit 113. Have

  The oscillator 101 converts a DC power supplied from an AC power source (not shown) through the converter 111 into a power corresponding to a target value determined by the CPU 105 and supplies a high frequency used to supply the electronic device 200. Oscillates.

  The power transmission circuit 102 generates power to be supplied to the electronic device 200 via the power feeding antenna 108 according to the frequency oscillated by the oscillator 101. The power generated by the power transmission circuit 102 is supplied to the matching circuit 103. In addition, the power generated by the power transmission circuit 102 includes first power for the power supply apparatus 100 to transmit a command for controlling the electronic device 200 to the electronic apparatus 200, and the power supply apparatus 100 to the electronic apparatus 200. And second power for charging the battery 210. The second power is higher than the first power, and when the power supply apparatus 100 transmits the second power to the electronic device 200, the power supply apparatus 100 may transmit a command to the electronic device 200. Can not. The first power is power set by the CPU 105 so that the power supply apparatus 100 can transmit a command to any electronic device.

  The CPU 105 controls the power transmission circuit 102 so that the power transmitted to the electronic device 200 is switched between the first power and the second power.

  The matching circuit 103 is a resonance circuit for performing resonance between the power feeding antenna 108 and the power receiving antenna 201 in accordance with the frequency oscillated by the oscillator 101. As shown in FIG. 2, the matching circuit 103 includes variable capacitors 301 and 302, a variable coil 303, a variable resistor 304, and the like, and performs impedance matching between the power transmission circuit 102 and the feeding antenna 108.

  The CPU 105 sets the values of the variable capacitors 301 and 302, the variable coil 303, and the variable resistor 304 of the matching circuit 103 in order to set the frequency oscillated by the oscillator 101 to a frequency at which the feeding antenna 108 and the power receiving antenna 201 resonate. To control. The frequency for resonance between the power feeding antenna 108 and the power receiving antenna 201 is hereinafter referred to as “resonance frequency f”.

  The resonance frequency f is assumed to be represented by the following mathematical formula (1). L represents the inductance of the matching circuit 103, and C represents the capacitance of the matching circuit 103.

  The CPU 105 controls the matching circuit 103 so as to change the value of the inductance L of the matching circuit 103 and the capacitance C of the matching circuit 103 so that the frequency oscillated by the oscillator 101 becomes a predetermined resonance frequency f.

The variable capacitor 301 and the variable capacitor 302 are capacitors for impedance matching. The variable capacitor 302 is also a capacitor for adjusting the resonance frequency f obtained by Expression (1).
The variable coil 303 is a coil for adjusting the resonance frequency f obtained by Expression (1).

The matching circuit 103 may further include a capacitor in addition to the variable capacitors 301 and 302, may further include a coil in addition to the variable coil 303, and may have a resistor in addition to the variable resistor 304. It may be. The resonance frequency f may be a commercial frequency of 50/60 Hz, may be 10 to several hundred kHz, or may be a frequency around 10 MHz.
Furthermore, the matching circuit 103 can also detect a change in the current flowing through the feeding antenna 108 and the voltage supplied to the feeding antenna 108.

  The modem circuit 104 modulates the power generated by the power transmission circuit 102 in accordance with a predetermined protocol in order to transmit a command to the electronic device 200. The predetermined protocol is a communication protocol such as RFID (Radio Frequency IDentification). The power generated by the power transmission circuit 102 is converted into a pulse signal by the modulation / demodulation circuit 104 as a command for communicating with the electronic device 200 and transmitted to the electronic device 200. The pulse signal transmitted to the electronic device 200 is recognized by the electronic device 200 as bit data including information of “1” and “0” by being analyzed. The command includes information for identifying the destination, a command code indicating an operation instructed by the command, and the like.

  The modem circuit 104 converts the power generated by the power transmission circuit 102 into a pulse signal by ASK (Amplitude Shift Keying) modulation using amplitude displacement. ASK modulation is modulation using amplitude displacement, and is used for communication between an IC card and a card reader that performs non-contact communication with the IC card.

  In addition, when the modem circuit 104 transmits a command to the electronic device 200, the response from the electronic device 200 to the command transmitted to the electronic device 200 according to the change in the current flowing through the feeding antenna 108 detected by the matching circuit 103. The signal can be demodulated. As a result, the modem circuit 104 can receive a response signal to the command transmitted to the electronic device 200 from the electronic device 200 by the load modulation method. The modem circuit 104 transmits a command to the electronic device 200 in accordance with an instruction from the CPU 105. Further, when the modulation / demodulation circuit 104 receives a response signal from the electronic device 200, the modulation / demodulation circuit 104 supplies the received response signal to the CPU 105.

  When connected to an AC power source (not shown), the CPU 105 controls each unit of the power supply apparatus 100 with power supplied from the AC power source (not shown) via the conversion unit 111. In addition, the CPU 105 controls the operation of each unit of the power supply apparatus 100 by executing a computer program stored in the ROM 106. The CPU 105 controls the power supplied to the electronic device 200 by controlling the power transmission circuit 102. Further, the CPU 105 transmits a command to the electronic device 200 by controlling the modulation / demodulation circuit 104.

  The ROM 106 stores information such as a computer program that controls the operation of each unit of the power supply apparatus 100 and parameters related to the operation of each unit.

  The RAM 107 is a rewritable non-volatile memory, a computer program that temporarily controls the operation of each unit of the power supply apparatus 100, information such as parameters related to the operation of each unit, information received from the electronic device 200 by the modem circuit 104, and the like Record. In addition, the RAM 107 stores a management table for managing the target to which the power supply apparatus 100 supplies power. In the management table recorded in the RAM 107, information included in the device information acquired from the electronic device 200 by the power supply apparatus 100 is registered.

  The power feeding antenna 108 is an antenna for transmitting the power generated by the power transmission circuit 102 to the electronic device 200 to the electronic device 200.

  The timer 109 measures the current time, the time related to the operation performed in each unit, and the like. A threshold value for the timer 109 is recorded in advance in the ROM 106.

  The recording / reproducing unit 110 records video data, audio data, and the like received from the electronic device 200 via the communication unit 112 in the recording medium 110a. The recording / reproducing unit 110 can also read video data, audio data, and the like from the recording medium 110 a and supply them to the RAM 107, the communication unit 112 and the display unit 113. Note that the recording medium 110 a may be a hard disk, a memory card, or the like, and may be a built-in power supply apparatus 100 or an external recording medium that is detachable from the power supply apparatus 100.

When an AC power supply (not shown) is connected, the conversion unit 111 converts AC power supplied from the AC power supply (not shown) into DC power, and supplies the converted DC power to the entire power supply apparatus 100.
The communication unit 112 can transmit video data and audio data stored in the RAM 107 and the recording medium 110 a to the electronic device 200, and can receive video data and audio data transmitted from the electronic device 200. For example, the communication unit 112 may transmit and receive video data and audio data using a serial bus interface such as USB (Universal Serial Bus) or an interface such as HDMI. Further, the communication unit 112 may transmit and receive video data and audio data by communication conforming to a wireless communication method. Further, for example, the communication unit 112 may perform transmission and reception of video data and audio data by modulating the signals to signals conforming to the 802.11a, b, g, and n standards defined in the wireless LAN standard. . Note that the communication unit 112 receives video data and audio data from the electronic device 200, receives video data and audio data even when a command is transmitted from the power supply apparatus 100 to the electronic device 200 by the modem circuit 104. Audio data can be transmitted to the electronic device 200. The communication unit 112 can transmit the video data and audio data supplied from the recording / reproducing unit 110 to the electronic device 200 when the video data and audio data are supplied from the recording / reproducing unit 110.

  The display unit 113 displays video data read from the recording medium 110 a by the recording / reproducing unit 110, icons indicating the operating state of the power supply apparatus 100, and the like. The display unit 113 may display video data received from the electronic device 200 by the communication unit 112. The display unit 113 can display the video data supplied from the recording / reproducing unit 110 when the video / audio data is supplied from the recording / reproducing unit 110.

  The power supply apparatus 100 may further include a speaker unit (not shown). A speaker unit (not shown) may output audio data read from the recording medium 110 a by the recording / reproducing unit 110 and audio data received from the electronic device 200 by the communication unit 112.

The power supply apparatus 100 has a first power supply mode and a second power supply mode as power supply modes. The first power supply mode is a mode in which the power supply apparatus 100 transmits only one of the first power and the second power to the electronic device 200. In addition, the second power supply mode refers to the case where the power supply apparatus 100 transmits one of the first power and the second power to the electronic device 200 while the power supply apparatus 100 transmits the electronic power via the communication unit 112. This is a mode for transmitting / receiving video data and audio data to / from the device 200.
A unit including at least the power transmission circuit 102, the matching circuit 103, and the modulation / demodulation circuit 104 is referred to as a “first communication unit”, and the communication unit 112 is referred to as a “second communication unit”.

  Next, the electronic device 200 will be described. The electronic device 200 includes a power receiving antenna 201, a matching circuit 202, a rectifying / smoothing circuit 203, a modem circuit 204, a CPU 205, a ROM 206, a RAM 207, a regulator 208, a charging control unit 209, a battery 210, a timer 211, a communication unit 212, and an imaging unit 213. Have.

The power receiving antenna 201 is an antenna for receiving the power supplied from the power supply apparatus 100.
The matching circuit 202 is a resonance circuit for performing impedance matching so that the power receiving antenna 201 resonates at the same frequency as the resonance frequency f of the power supply apparatus 100. The matching circuit 202 includes a variable capacitor, a variable coil, a variable resistor, and the like. The CPU 205 controls the capacitance value of the variable capacitor, the inductance value of the variable coil, and the impedance value of the variable resistor so that the power receiving antenna 201 resonates at the same frequency as the resonance frequency f of the power supply apparatus 100. .

  The rectifying / smoothing circuit 203 removes a command and noise from the power received by the power receiving antenna 201 and generates DC power for charging the battery 210. Further, the rectifying / smoothing circuit 203 supplies the generated DC power to the regulator 208. The rectifying / smoothing circuit 203 supplies the command removed from the power received by the power receiving antenna 201 to the modulation / demodulation circuit 204.

  The modem circuit 204 analyzes the command supplied from the rectifying / smoothing circuit 203 according to the power supply apparatus 100 and a predetermined communication protocol, and supplies the command analysis result to the CPU 105.

  The CPU 205 determines what command the command received by the modem circuit 204 is based on the analysis result supplied from the modem circuit 204, and performs the process specified by the command code corresponding to the received command. .

  In addition, the CPU 205 controls the operation of each unit of the electronic device 200 by executing a computer program stored in the ROM 206. The CPU 205 can also manage whether video data and audio data recorded in the RAM 207 and the recording medium 213 b of the electronic device 200 are transmitted to the power supply apparatus 100. The CPU 205 records transmission information indicating video data and audio data that the communication unit 212 has already transmitted to the power supply apparatus 100 in the RAM 207, and has not yet transmitted video data and audio data that the communication unit 212 has not transmitted to the power supply apparatus 100. Information is recorded in the RAM 207.

  The ROM 206 stores information such as a computer program that controls the operation of each unit of the electronic device 200 and parameters related to the operation of each unit. In addition, device information of the electronic device 200, power reception capability information of the electronic device 200, display data, and the like are recorded in the ROM 206. The device information of the electronic device 200 includes an identification ID of the electronic device 200, a manufacturer name, a device name, a manufacturing date, and means for receiving power transmitted from the power supply device 100 in a contactless manner. Information indicating whether or not it has is included. The means for receiving power transmitted from the power supply apparatus 100 in a non-contact manner is hereinafter referred to as “power receiving means”. Note that the power receiving means includes at least the power receiving antenna 201. In addition to the power receiving antenna 201, the power receiving means may further include a matching circuit 202, a rectifying / smoothing circuit 203, a modem circuit 204, and the like.

  The power reception capability information of the electronic device 200 includes information indicating power that can be received by the electronic device 200 at maximum and information indicating power that can be received by the electronic device 200 at the minimum. Furthermore, the power reception capability information of the electronic device 200 includes information indicating power necessary for the electronic device 200 to communicate with the power supply apparatus 100 by a command. Further, the power reception capability information of the electronic device 200 includes information indicating the power required for the electronic device 200 to operate the communication unit 212, information indicating the power required for the electronic device 200 to charge, and the electronic device 200. Information indicating whether or not the battery has a charging function is included. Furthermore, the power reception capability information of the electronic device 200 includes information indicating power necessary for the electronic device 200 to operate the imaging unit 213.

  The RAM 207 is a rewritable nonvolatile memory, and records a computer program that temporarily controls the operation of each unit of the power supply apparatus 100, information such as parameters regarding the operation of each unit, information transmitted from the power supply apparatus 100, and the like.

  The regulator 208 performs control so that the voltage of the DC power supplied from the rectifying / smoothing circuit 203 becomes a voltage value set by the CPU 205. Note that the DC power controlled to have the voltage value set by the CPU 205 from the rectifying / smoothing circuit 203 via the regulator 208 is supplied to the charging control unit 209.

  Further, the regulator 208 controls so that the voltage of the power supplied from the battery 210 becomes a voltage value set by the CPU 205. The DC power controlled so as to have a voltage value set by the CPU 205 from the battery 210 via the regulator 208 is supplied to at least the CPU 205, ROM 206 and RAM 207.

  Further, the regulator 208 controls so that the voltage of power supplied from an AC power source (not shown) becomes a voltage value set by the CPU 205. Direct current power controlled so as to have a voltage value set by the CPU 205 from an AC power source (not shown) via the regulator 208 is supplied to at least the CPU 205, ROM 206, and RAM 207.

  Charging control unit 209 charges battery 210 when DC power is supplied from regulator 208. In addition, the charging control unit 209 periodically detects information indicating the remaining capacity of the attached battery 210 and supplies the information to the CPU 205. The CPU 205 records information indicating the remaining capacity of the battery 210 supplied from the charging control unit 209 (hereinafter referred to as “remaining capacity information”) in the RAM 207.

The battery 210 is a battery that can be attached to and detached from the electronic device 200. The battery 210 is a rechargeable secondary battery, such as a lithium ion battery. The battery 210 can supply power to each part of the electronic device 200.
The timer 211 measures the current time, the time related to operations performed in each unit, and the like. The threshold value for the timer 211 is recorded in the ROM 206 in advance.

  The communication unit 212 can transmit video data and audio data recorded in the ROM 206 and the recording medium 213 b to the power supply apparatus 100, and can receive video data and audio data from the power supply apparatus 100. For example, the communication unit 212 transmits and receives video data and audio data using a serial bus interface such as USB. Further, for example, the communication unit 212 may perform transmission and reception of video data and audio data by modulating the signal to a signal conforming to the 802.11a, b, g, and n standards defined as a wireless LAN.

  The imaging unit 213 includes an imaging device, an image processing unit, an encoding control unit, a recording unit 213a, a recording medium 213b, and the like. The imaging unit 213 captures video data from the subject, and records video data such as a still image and a moving image obtained from the result of the recording on the recording medium 213b. Furthermore, the imaging unit 213 may have a configuration necessary for photographing the subject in the electronic device 200.

Note that the power feeding antenna 108 and the power receiving antenna 201 may be a helical antenna or a planar antenna such as a meander line antenna.
Also, in the system in which the power supply apparatus 100 supplies power to the electronic apparatus 200 in a non-contact manner by providing the electrode in the power supply apparatus 100 instead of the power supply antenna 108 and providing the electrode in the electronic apparatus 200 instead of the power reception antenna 201. The present invention can be applied.
The present invention can also be applied to a system in which the power supply apparatus 100 supplies electric power to the electronic device 200 in a non-contact manner by electric field coupling.
In the first embodiment, the power supply apparatus 100 transmits power to the electronic device 200 in a contactless manner, and the electronic apparatus 200 receives power from the power supply device 100 in a contactless manner. "May be rephrased as" wireless ".

(Detection process)
The detection process performed by the power supply apparatus 100 will be described with reference to the flowchart of FIG. The detection process illustrated in FIG. 3 is a process performed by the power supply apparatus 100 when the power supply apparatus 100 is powered on and the operation mode of the power supply apparatus 100 is in a mode for starting power supply.

  In S <b> 301, the CPU 105 transmits the first power to detect whether the distance between the power supply apparatus 100 and the electronic device 200 is within a predetermined range, the oscillator 101, the power transmission circuit 102, and The matching circuit 103 is controlled. In this case, the flowchart proceeds from S301 to S302.

  In S <b> 302, the CPU 105 determines whether the current flowing through the power feeding antenna 108 detected by the matching circuit 103 is greater than or equal to a predetermined value, so that the distance between the power feeding apparatus 100 and the electronic device 200 is within a predetermined range. It is determined whether or not to do.

  When the current flowing through the power feeding antenna 108 is lower than a predetermined value, the CPU 105 determines that the distance between the power feeding apparatus 100 and the electronic device 200 does not exist within a predetermined range. In this case (No in S302), the flowchart proceeds from S302 to S311. When the current flowing through the power feeding antenna 108 is equal to or greater than a predetermined value, the CPU 105 determines that the distance between the power feeding apparatus 100 and the electronic device 200 is within a predetermined range. In this case (Yes in S302), the flowchart proceeds from S302 to S303. Note that whether or not the distance between the power supply apparatus 100 and the electronic device 200 is within a predetermined range may be determined by a method other than the determination based on the current flowing through the power supply antenna 108. For example, the power supply apparatus 100 may transmit a command for confirming that the electronic device 200 exists within a predetermined range to the electronic device 200. In this case, the power supply apparatus 100 determines whether or not the distance between the power supply apparatus 100 and the electronic device 200 is within a predetermined range depending on whether or not a response signal corresponding to the command is received from the electronic device 200. You may judge.

  In S303, the CPU 105 transmits / receives a first command for requesting device information of a plurality of electronic devices including the electronic device 200 determined to be within the predetermined range in S302 to the electronic device 200. 104 is controlled. Further, the CPU 105 controls the modulation / demodulation circuit 104 so as to receive a response signal corresponding to the first command. When the CPU 105 determines that the modulation / demodulation circuit 104 has received the response signal corresponding to the first command, the process proceeds from S303 to S304. Note that the power supply apparatus 100 receives a response signal corresponding to the first command from the plurality of electronic devices when the plurality of electronic devices exist within a predetermined range. When the CPU 105 determines that the modem circuit 104 has not received a response signal corresponding to the first command, the process proceeds from S303 to S311. The CPU 105 acquires device information from the response signal corresponding to the first command received by the modulation / demodulation circuit 104, and records it all in the management table of the RAM 107 so that it can be identified for each electronic device.

  In step S304, the CPU 105 determines whether the electronic device 200 can receive the power transmitted from the power supply apparatus 100 in a contactless manner from the device information included in the response signal to the first command received in step S303. The CPU 105 determines whether or not the information indicating that the electronic device 200 has a power receiving unit is included in the device information received in S303 (second determination). When the information indicating that the electronic device 200 has a power receiving unit is not included in the device information, the CPU 105 determines that the electronic device 200 cannot receive the power transmitted from the power supply apparatus 100 in a contactless manner. In this case (No in S304), the flowchart proceeds from S304 to S311. When the electronic device 200 includes information indicating that the electronic device 200 has power receiving means in the device information, the CPU 105 determines that the electronic device 200 can receive the power transmitted from the power supply apparatus 100 in a contactless manner. . In this case (Yes in S304), the flowchart proceeds from S304 to S305. When there are a plurality of electronic devices for the power supply apparatus 100 and all the electronic devices have power receiving means (Yes in S304), the process proceeds from S304 to S305. If there is at least one electronic device that does not have a power receiving unit for the power supply apparatus 100 (No in S304), the process proceeds from S304 to S311.

  In step S <b> 305, the CPU 105 controls the modulation / demodulation circuit 104 so as to transmit the second command for requesting the power reception capability information of the electronic device 200 to the electronic device 200. Further, the CPU 105 controls the modulation / demodulation circuit 104 so as to receive a response signal corresponding to the second command. When the CPU 105 determines that the modem circuit 104 has received a response signal corresponding to the second command, the process proceeds from S305 to S306. If the CPU 105 determines that the modem circuit 104 has not received a response signal corresponding to the second command, the process proceeds from S305 to S311.

  In step S <b> 306, the CPU 105 controls the modulation / demodulation circuit 104 so as to transmit power supply capability information indicating power transmitted from the power supply apparatus 100 to the electronic device 200. The power supply capability information includes information indicating the power transmitted from the power supply apparatus 100 to the electronic device 200 as the first power and information indicating the power transmitted from the power supply apparatus 100 to the electronic device 200 as the second power. . When the power supply capability information is transmitted to the electronic device 200, the flowchart proceeds from S306 to S307.

  In step S <b> 307, the CPU 105 controls the modulation / demodulation circuit 104 to transmit a third command for requesting the remaining capacity information of the electronic device 200 to the electronic device 200. Further, the CPU 105 controls the modulation / demodulation circuit 104 so as to receive a response signal corresponding to the third command. When the CPU 105 determines that the modem circuit 104 has not received a response signal corresponding to the third command, the process proceeds from S307 to S311. When the CPU 105 determines that the modem circuit 104 has received a response signal corresponding to the third command, the process proceeds from S307 to S308.

  In step S <b> 308, the CPU 105 transmits / receives a fourth command for requesting untransmitted information indicating video data and audio data that the electronic device 200 has not transmitted to the power supply apparatus 100 to the electronic device 200. 104 is controlled. Further, the CPU 105 controls the modulation / demodulation circuit 104 so as to receive a response signal corresponding to the fourth command. The video data that the electronic device 200 has not transmitted to the power supply apparatus 100 is, for example, video data captured by the electronic device 200 or video data recorded on the electronic device 200. Note that video data that the electronic device 200 has not transmitted to the power supply apparatus 100 is hereinafter referred to as “predetermined video data”. When the CPU 105 determines that the modem circuit 104 has not received a response signal corresponding to the fourth command, the process proceeds from S308 to S311. If the CPU 105 determines that the modem circuit 104 has received a response signal corresponding to the fourth command, the process proceeds from S308 to S309. The response signal corresponding to the fourth command includes untransferred information.

  In S309, the CPU 105 determines whether or not the processes in S305 to S308 have been performed on all the electronic devices recorded in the management table of the RAM 107 in S303. If the CPU 105 determines that the processing of S305 to S308 has not been performed on all the electronic devices recorded in the management table of the RAM 107 (No in S309), the flowchart returns from S309 to S305. If it is determined by the CPU 105 that the processing of S305 to S308 has been performed on all electronic devices recorded in the management table of the RAM 107 (Yes in S309), the process proceeds from S309 to S310.

  In S <b> 310, the CPU 105 performs a selection process for selecting one electronic device to be fed from the electronic devices recorded in the management table of the RAM 107. When the selection process is performed, this flowchart ends.

  In step S <b> 311, the CPU 105 controls the oscillator 101, the power transmission circuit 102, and the matching circuit 103 to stop transmission of the first power to the electronic device 200. In this case, this flowchart ends.

(Selection process)
The selection process in S310 performed by the power supply apparatus 100 will be described using the flowchart of FIG.
In S401, the CPU 105 determines whether there is an electronic device having predetermined video data among the electronic devices recorded in the management table of the RAM 107 according to the untransmitted information acquired in S308 ( First determination). If the CPU 105 determines that there is at least one electronic device having predetermined video data among the electronic devices recorded in the management table of the RAM 107 (Yes in S401), the process proceeds from S401 to S403. If the CPU 105 determines that there is no electronic device having predetermined video data among the electronic devices recorded in the management table of the RAM 107 (No in S401), the process proceeds from S401 to S402.

  In S <b> 402, the CPU 105 selects one electronic device to be fed by the power feeding apparatus 100 from among a plurality of electronic devices including the electronic device 200 recorded in the management table of the RAM 107 according to the remaining capacity of the battery. . In S402, the CPU 105 calculates the remaining capacity of the battery connected to each electronic device from the remaining capacity information acquired in S307, and compares the remaining capacity of each battery. As a result of the comparison, the CPU 105 selects an electronic device to which a battery with the smallest remaining capacity is connected among the remaining capacity of each battery as a power supply target of the power supply apparatus 100. For example, when the electronic device 200 is selected as a power supply target by the CPU 105, the CPU 105 transmits a fifth command for notifying that the electronic device 200 has been selected as a power supply target to the electronic device 200. The modem circuit 104 is controlled. The CPU 105 determines whether or not the modulation / demodulation circuit 104 has received a response signal corresponding to the fifth command. When the CPU 105 determines that the modulation / demodulation circuit 104 has received a response signal corresponding to the fifth command, the CPU 105 is subject to power supply to the identification ID of the electronic device 200 recorded in the management table of the RAM 107. Set a flag to indicate. In this case, this flowchart ends.

  In S403, the CPU 105 determines whether there are a plurality of electronic devices having predetermined video data among the electronic devices recorded in the management table of the RAM 107, according to the untransmitted information acquired in S308. When the CPU 105 determines that there are a plurality of electronic devices having predetermined video data among the electronic devices recorded in the management table of the RAM 107 (Yes in S403), the process proceeds from S403 to S404. When the CPU 105 determines that there is one electronic device having predetermined video data among the electronic devices recorded in the management table of the RAM 107 (No in S403), the process proceeds from S403 to S405.

  In S <b> 404, the CPU 105 is a power supply target of the power supply apparatus 100 from among a plurality of electronic devices having the predetermined video data determined in S <b> 403 according to the remaining capacity of the battery to which each electronic device is connected. Select one electronic device. In S404, the CPU 105 calculates the remaining capacity of the battery connected to each electronic device from the remaining capacity information acquired in S307, and compares the remaining capacity of each battery. As a result of the comparison, the CPU 105 selects, as the power supply target of the power supply apparatus 100, an electronic device to which the battery with the smallest remaining capacity is connected among the remaining capacity of each battery and has predetermined video data. For example, when the electronic device 200 is selected as a power supply target by the CPU 105, the CPU 105 controls the modulation / demodulation circuit 104 so as to transmit the fifth command to the electronic device 200. The CPU 105 determines whether or not the modulation / demodulation circuit 104 has received a response signal corresponding to the fifth command.

  When the CPU 105 determines that the modulation / demodulation circuit 104 has received a response signal corresponding to the fifth command, the CPU 105 is subject to power supply to the identification ID of the electronic device 200 recorded in the management table of the RAM 107. Set a flag to indicate. In this case, this flowchart ends.

  In step S <b> 405, the CPU 105 selects the electronic device 200 having predetermined video data as a power supply target of the power supply apparatus 100. For example, when the electronic device 200 having predetermined video data is selected as a power supply target by the CPU 105, the CPU 105 controls the modulation / demodulation circuit 104 to transmit the fifth command to the electronic device 200. The CPU 105 determines whether or not the modulation / demodulation circuit 104 has received a response signal corresponding to the fifth command. In this case, the CPU 105 selects the electronic device 200 as a power supply target of the power supply apparatus 100 without comparing the remaining capacity of each battery. When the CPU 105 determines that the modulation / demodulation circuit 104 has received a response signal corresponding to the fifth command, the CPU 105 is subject to power supply to the identification ID of the electronic device 200 recorded in the management table of the RAM 107. Set a flag to indicate. In this case, this flowchart ends.

(Power supply mode selection process)
The power supply mode selection process performed by the power supply apparatus 100 will be described with reference to the flowchart of FIG.

  The power supply mode selection process illustrated in FIG. 5 is a process performed by the power supply apparatus 100 for the electronic device selected as the power supply target in the selection process of S310 when the selection process of S310 is performed. In the first embodiment, a case where the electronic device 200 is selected by the power supply apparatus 100 as a power supply target by the selection process in S310 will be described below as an example.

  In step S <b> 501, the CPU 105 controls the modulation / demodulation circuit 104 to transmit a sixth command for requesting number information indicating the number of power receiving units included in the electronic device 200 to the electronic device 200. When the electronic device 200 has two or more power receiving means, the electronic device 200 includes the power receiving antenna 201, the matching circuit 202, the rectifying / smoothing circuit 203, and the modulation / demodulation circuit 204, and the battery 210 has the power receiving antenna, matching circuit, and rectifier. This is a state having a smoothing circuit and a modulation / demodulation circuit. If the CPU 105 determines that the modem circuit 104 has received a response signal corresponding to the sixth command, the process proceeds from S501 to S502.

  In step S <b> 502, the CPU 105 determines whether or not the electronic device 200 has two or more power receiving units according to the number information included in the response signal corresponding to the sixth command. If the CPU 105 determines that the electronic device 200 has two or more power receiving means according to the number information included in the response signal corresponding to the sixth command (Yes in S502), this flowchart is changed from S502. The process proceeds to S503. When the CPU 105 determines that the electronic device 200 has one power receiving unit according to the number information included in the response signal corresponding to the fifth command, the electronic device 200 has two or more power receiving units. It is determined that there is no. In this case (No in S502), the flowchart proceeds from S502 to S504. The case where the electronic device 200 has one power receiving means is, for example, a state where the electronic device 200 includes a power receiving antenna 201, a matching circuit 202, a rectifying / smoothing circuit 203, and a modem circuit 204. In this case, the battery 210 does not include a power receiving antenna, a matching circuit, a rectifying / smoothing circuit, and a modem circuit. As another example, the electronic device 200 does not include the power receiving antenna 201, the matching circuit 202, the rectifying / smoothing circuit 203, and the modulation / demodulation circuit 204, but the battery 210 includes the power receiving antenna, the matching circuit, the rectifying / smoothing circuit, and the modulation / demodulation circuit. It is the state which has.

  In step S503, the CPU 105 enables any one of the two or more power receiving units included in the electronic device 200 in step S502 and disables the other power receiving units. Therefore, the CPU 105 controls the modulation / demodulation circuit 104 so as to transmit to the electronic device 200 a seventh command for requesting to invalidate the power receiving means other than the selected power receiving means. When the CPU 105 determines that the modulation / demodulation circuit 104 has received a response signal corresponding to the seventh command, the process proceeds from S503 to S504.

  In step S <b> 504, the CPU 105 controls the modulation / demodulation circuit 104 to transmit an eighth command for requesting display data for visually identifying the electronic device 200 to the electronic device 200. The display data for visually identifying the electronic device 200 includes video data such as an icon indicating the operation state of the electronic device 200, an icon indicating the shape of the electronic device 200, and a GUI of the electronic device 200. When the CPU 105 determines that the modem circuit 104 has received a response signal corresponding to the eighth command, the process proceeds from S504 to S505. The CPU 105 acquires display data included in the response signal corresponding to the eighth command, records it in the RAM 107, and displays it on the display unit 113 or an external display device. This allows the user to visually identify the electronic device that is currently the target of power supply.

  In step S505, the CPU 105 determines whether the electronic device 200 has predetermined video data according to the untransmitted information acquired in step S308. When the CPU 105 determines that the electronic device 200 has predetermined video data (Yes in S505), the process proceeds from S505 to S507. When the CPU 105 determines that the electronic device 200 does not have the predetermined video data (No in S505), the process proceeds from S505 to S506.

  In step S506, the CPU 105 sets the power supply mode of the power supply apparatus 100 to be the first power supply mode. When the power supply apparatus 100 is set to be in the first power supply mode, the CPU 105 performs a first power supply process for transmitting the second power to the electronic device 200. In this case, this flowchart ends.

  In step S507, the CPU 105 sets the power supply mode of the power supply apparatus 100 to be the second power supply mode. When the power supply mode of the power supply apparatus 100 is set to be the second power supply mode, the CPU 105 transmits the second power to the electronic device 200 and receives predetermined video data from the electronic device 200. The second power supply process is performed. In this case, this flowchart ends.

  When the power supply mode of the power supply apparatus 100 is either the first power supply mode or the second power supply mode, the power supply apparatus 100 transmits a ninth command for notifying the start of power supply to the electronic device 200. Thus, the electronic device 200 is controlled to start charging the battery 210. In addition, when the CPU 105 determines that the battery 210 is fully charged, the power supply apparatus 100 transmits a tenth command for notifying the stop of power supply to the electronic device 200, thereby the battery 210. The electronic device 200 is controlled to stop charging.

  When the power supply mode of the power supply apparatus 100 is the second power supply mode, the power supply apparatus 100 supplies the predetermined video data by transmitting an eleventh command for requesting the predetermined video data to the electronic device 200. The electronic device 200 is controlled to transmit to the device 100. When the CPU 105 determines that the transmission of the predetermined video data from the electronic device 200 has ended, the power supply apparatus 100 issues a twelfth command for requesting the stop of the transmission of the predetermined video data to the electronic device. 200. As a result, the power supply apparatus 100 controls the electronic device 200 so as to stop transmission of predetermined video data. Further, when the power supply mode of the power supply apparatus 100 is the second power supply mode, the power supply apparatus 100 may display predetermined video data received from the electronic device 200 on the display unit 113 or an external display apparatus. .

  The detection process shown in FIG. 3, the selection process shown in FIG. 4, and the power supply mode selection process shown in FIG. 5 can be realized by the CPU 105 executing a computer program stored in the ROM 106. When the processing shown in FIGS. 3 to 5 is performed, the CPU 105 detects whether or not an AC power source (not shown) is connected to the electronic device 200. Further, when the processing shown in FIGS. 3 to 5 is performed, the CPU 105 detects whether or not an abnormal current flows through the feeding antenna 108. When the processing shown in FIGS. 3 to 5 is performed, the CPU 105 detects whether an error has occurred in the power supply apparatus 100. Note that the error in this case may be an error that occurs inside the power supply apparatus 100 or a communication error that occurs between the power supply apparatus 100 and the electronic device 200.

  When the processing shown in FIGS. 3 to 5 is performed, when the CPU 105 detects that an AC power source (not shown) is connected to the electronic device 200, the CPU 105 transmits the first power and the second power to the electronic device. The power supply apparatus 100 is controlled so as not to be transmitted to 200. Further, when the processing shown in FIGS. 3 to 5 is performed, when the CPU 105 detects that an abnormal current flows through the power feeding antenna 108, the CPU 105 uses the first power and the second power as electronic data. The power supply apparatus 100 is controlled not to transmit to the device 200. 3 to 5, when the CPU 105 detects that an error has occurred in the power supply apparatus 100, the CPU 105 supplies the first power and the second power to the electronic device 200. The power feeding apparatus 100 is controlled so as not to transmit.

(State transition diagram of power supply apparatus 100)
The state transition of the power supply apparatus 100 according to the first embodiment will be described with reference to the state transition diagram of FIG. In the state transition diagram shown in FIG. 6, a state 600 is a mode in which the operation mode of the power supply apparatus 100 starts power supply, and is a state in which an AC power source (not shown) and the power supply apparatus 100 are connected. When the power supply apparatus 100 is in a power-on state and power is supplied to the CPU 105 from an AC power source (not shown) via the conversion unit 111, the power supply apparatus 100 transitions from the state 600 to the state 601.

  In state 601, the power supply apparatus 100 stops the operation of the power transmission circuit 102 so as not to generate power to be transmitted to the electronic device 200. In this case, the power supply apparatus 100 waits until the predetermined time is measured by the timer 109, and when the predetermined time is measured by the timer 109, the power supply apparatus 100 sets the power transmission circuit 102 to transmit the first power to the electronic device 200. Make it work. In this case, the state 601 transits to the state 602. The fixed time is a threshold value of the timer 109 recorded in the ROM 106 in advance.

  In the state 602, the power supply apparatus 100 determines whether or not the distance between the power supply apparatus 100 and the electronic device 200 is within a predetermined range. When the power supply apparatus 100 determines that the distance between the power supply apparatus 100 and the electronic device 200 is not within the predetermined range, the power supply apparatus 100 transitions from the state 602 to the state 601. Furthermore, when the power supply apparatus 100 determines that the distance between the power supply apparatus 100 and the electronic device 200 is within a predetermined range, the power supply device 100 transmits a first command to the electronic device 200. The power supply apparatus 100 determines whether or not the electronic device 200 has a power receiving unit from a response signal to the first command received by the modulation / demodulation circuit 104 from the electronic device 200. When the power supply apparatus 100 determines that the electronic device 200 has a power receiving unit, the power supply apparatus 100 transitions from the state 602 to the state 603. When the power supply apparatus 100 determines that the electronic device 200 does not have a power receiving unit, the power supply apparatus 100 transitions from the state 602 to the state 601. When the power supply apparatus 100 determines that the modem circuit 104 has not received a response signal to the first command, the power supply apparatus 100 transitions from the state 602 to the state 601.

  In the state 603, the power supply apparatus 100 transmits the second command, the third command, and the fourth command to the electronic device 200 determined to be within the predetermined range in the state 602. The power supply apparatus 100 acquires the power reception capability information of the electronic device 200 from the response signal to the second command received by the modulation / demodulation circuit 104. The power supply apparatus 100 acquires the remaining capacity information from the response signal to the third command received by the modulation / demodulation circuit 104. The power supply apparatus 100 acquires untransmitted information from the response signal to the fourth command received by the modem circuit 104. Furthermore, the power supply apparatus 100 selects whether or not the electronic device 200 is a power supply target according to the power reception capability information and the remaining capacity information of the electronic device 200 acquired from the electronic device 200. Furthermore, the power supply apparatus 100 selects whether to supply power in the first power supply mode or in the second power supply mode to the electronic device selected as the power supply target according to the untransmitted information. Hereinafter, a case where the electronic device 200 is selected as a power supply target of the power supply apparatus 100 will be described as an example.

  When the operation mode of the power supply apparatus 100 is selected as the first power supply mode, the power supply apparatus 100 transitions from the state 603 to the state 604. When the operation mode of the power supply apparatus 100 is selected as the second power supply mode, the power supply apparatus 100 transitions from the state 603 to the state 607.

  In the state 604, the power supply apparatus 100 sends a command for adjusting the second power to be transmitted to the electronic device 200, a command for setting the electronic device 200 to a state where the battery 210 can be charged, and the like. 200 is transmitted. When the power supply apparatus 100 determines that the modulation / demodulation circuit 104 has received a response signal to each command, the power supply apparatus 100 performs a process for adjusting the second power and a process for setting the electronic device 200 to a state where the battery 210 can be charged. Do. When the power supply apparatus 100 performs a process for adjusting the second power and a process for making the electronic device 200 in a state where the battery 210 can be charged, the power supply apparatus 100 sends a ninth command to the electronic device. 200 is transmitted. In this case, the power supply apparatus 100 transitions from the state 604 to the state 605. When the power supply apparatus 100 determines that the electronic device 200 cannot be charged to the battery 210, the power supply apparatus 100 transitions from the state 604 to the state 611. When the power supply apparatus 100 determines that the modulation / demodulation circuit 104 has not received a response signal to each command, the power supply apparatus 100 transitions from the state 604 to the state 611. In addition, when the power feeding apparatus 100 detects that the current flowing through the power feeding antenna 108 detected by the matching circuit 103 has suddenly changed, the power feeding apparatus 100 transitions from the state 604 to the state 611.

  In the state 605, the power supply apparatus 100 transmits the third command to the electronic device 200. The power supply apparatus 100 determines whether or not the battery 210 is fully charged according to the remaining capacity information included in the response signal to the third command. When the power supply apparatus 100 determines that the battery 210 is fully charged, the power supply apparatus 100 transitions from the state 605 to the state 611. When the power supply apparatus 100 determines that the current flowing through the power supply antenna 108 detected by the matching circuit 103 has suddenly changed when the modem circuit 104 receives a response signal to the third command, Transition from 605 to state 611 is made. When the error signal is included in the response signal to the third command received by the modem circuit 104, the power supply apparatus 100 determines that a communication error has occurred between the communication unit 112 and the communication unit 212. When the power supply apparatus 100 determines that a communication error has occurred between the communication unit 112 and the communication unit 212, the power supply device 100 transitions from the state 605 to the state 611. When the power supply apparatus 100 does not transition from the state 605 to the state 611, that is, when the power supply apparatus 100 determines that the battery 210 is not fully charged, the power supply apparatus 100 waits until a predetermined time is measured by the timer 109. The power supply apparatus 100 transitions from the state 605 to the state 606 when a predetermined time is measured by the timer 109.

  In the state 606, the power supply apparatus 100 transmits the second power to the electronic device 200. The power supply apparatus 100 adjusts the second power according to the power reception capability information acquired from the electronic device 200. In addition, the power supply apparatus 100 may adjust the second power according to the remaining capacity information of the battery 210. In this case, the power supply apparatus 100 waits until a predetermined time is measured by the timer 109, and transitions from the state 606 to the state 605 when the predetermined time is measured by the timer 109. When the power supply apparatus 100 determines that the current flowing through the power supply antenna 108 detected by the matching circuit 103 has suddenly changed until the predetermined time is measured by the timer 109, the state changes from the state 606 to the state 605. Transition. When the power supply apparatus 100 transitions from the state 606 to the state 605, the power supply apparatus 100 causes the power transmitted from the power supply apparatus 100 to the electronic device 200 to be the first power. Similarly, when the power supply apparatus 100 transitions from the state 606 to the state 604, the power supply apparatus 100 causes the power transmitted from the power supply apparatus 100 to the electronic device 200 to be the first power.

  In the state 607, the power supply apparatus 100 instructs the electronic device 200 to check whether or not the communication unit 212 of the electronic device 200 can transmit video data and audio data to the power supply apparatus 100. The command is transmitted to the electronic device 200. The power supply apparatus 100 determines whether or not the electronic device 200 can transmit video data and audio data to the power supply apparatus 100 according to response signals to the commands received by the modulation / demodulation circuit 104 from the electronic device 200. When it is determined that the communication unit 212 can transmit video data and audio data to the power supply apparatus 100 and the remaining capacity of the battery 210 is larger than the predetermined remaining capacity, the power supply apparatus 100 uses the second power. Do not transmit to the electronic device 200. In this case, the power supply apparatus 100 transmits the first power to the electronic device 200, but does not transmit the second power to the electronic device 200, and receives predetermined video data from the electronic device 200 by the communication unit 112. Do processing. In this case, the power supply apparatus 100 proceeds from the state 607 to the state 610.

  When the power supply apparatus 100 determines that the communication unit 212 can transmit video data and audio data to the power supply apparatus 100 and determines that the remaining capacity of the battery 210 is equal to or less than a predetermined remaining capacity, the power supply apparatus 100 supplies the second power. The battery 210 is charged by transmitting to the electronic device 200. In this case, the power supply apparatus 100 performs processing for receiving predetermined video data from the electronic device 200 by the communication unit 112 while transmitting the second power to the electronic device 200. In this case, the power supply apparatus 100 proceeds from the state 607 to the state 608.

  When the communication unit 212 determines that the remaining capacity of the battery 210 is equal to or less than a predetermined remaining capacity when the communication unit 212 cannot transmit video data or audio data to the power supply apparatus 100, the power supply apparatus 100 performs electronic device The predetermined video data is not received from 200. In this case, the communication unit 112 does not perform processing for receiving predetermined video data from the electronic device 200, but the battery 210 is charged by transmitting the second power to the electronic device 200. In this case, the power supply apparatus 100 transitions from the state 607 to the state 604.

  In the state 608, the power supply apparatus 100 transmits the eleventh command and the third command to the electronic device 200. The power supply apparatus 100 controls the electronic device 200 to transmit predetermined video data to the power supply apparatus 100 by transmitting the eleventh command to the electronic apparatus 200. Furthermore, the power supply apparatus 100 determines whether or not the battery 210 is fully charged according to the remaining capacity information included in the response signal to the third command received by the modem circuit 104. During this time, the communication unit 112 receives the predetermined video data transmitted from the communication unit 212, and records the received predetermined video data on the recording medium 110a. During this time, the power supply apparatus 100 determines whether or not reception of predetermined video data transmitted from the communication unit 212 is completed, and determines whether or not a communication error has occurred between the communication unit 112 and the communication unit 212. judge. When the power supply apparatus 100 determines that the reception of the predetermined video data transmitted from the communication unit 212 has been completed and determines that the battery 210 is fully charged, the power supply apparatus 100 transitions from the state 608 to the state 611. When the power supply apparatus 100 determines that a communication error has occurred between the communication unit 112 and the communication unit 212, the power supply device 100 transitions from the state 608 to the state 611. When the power supply apparatus 100 determines that the current flowing through the power supply antenna 108 detected by the matching circuit 103 has changed abruptly, the power supply apparatus 100 transitions from the state 608 to the state 611.

  When the power supply apparatus 100 determines that the reception of the predetermined video data transmitted from the communication unit 212 is not completed, the power supply apparatus 100 waits until a predetermined time elapses with the timer 109. Further, even when it is determined that the battery 210 is not fully charged, the power supply apparatus 100 stands by until a predetermined time elapses by the timer 109. When the predetermined time is measured by the timer 109, the power supply apparatus 100 transitions from the state 608 to the state 609. Note that the communication unit 112 continues to receive predetermined video data transmitted from the communication unit 212 until a predetermined time is measured by the timer 109.

  In the state 609, the power supply apparatus 100 transmits a ninth command to the electronic device 200. As a result, the power supply apparatus 100 receives predetermined video data transmitted from the electronic device 200 while transmitting the second power to the electronic device 200. In this case, the apparatus waits until the predetermined time is measured by the timer 109, and when the predetermined time is measured by the timer 109, the power supply apparatus 100 transitions from the state 609 to the state 608. If the power supply apparatus 100 determines that the current flowing through the power supply antenna 108 detected by the matching circuit 103 has suddenly changed until the predetermined time is measured by the timer 109, the state changes from state 609 to state 608. Transition. When the power supply apparatus 100 transitions from the state 609 to the state 608, the CPU 105 controls the power transmitted from the power supply apparatus 100 to the electronic device 200 to be the first power.

  In the state 610, the power supply apparatus 100 transmits the eleventh command to the electronic device 200. When the power supply apparatus 100 determines that the modulation / demodulation circuit 104 has received a response signal corresponding to the eleventh command from the electronic device 200, the communication unit 112 receives predetermined video data transmitted from the communication unit 212. The communication unit 112 is controlled. Further, in this case, the power supply apparatus 100 controls the recording / reproducing unit 110 to record the predetermined video data received by the communication unit 112 on the recording medium 110a. In this case, the power supply apparatus 100 transitions from the state 610 to the state 602.

In the state 611, the power supply apparatus 100 transmits the tenth command and the twelfth command to the electronic device 200, prevents the first power and the second power from being transmitted to the electronic device 200, and transmits them from the electronic device 200. The predetermined video data is not received. In this case, the power supply apparatus 100 transitions from the state 611 to the state 602.
In the first embodiment, the state of the power supply apparatus 100 is described separately in the state 601 and the state 602, but the state 601 and the state 602 may be the same state.

(Command reception processing)
Command reception processing performed by the electronic device 200 will be described with reference to the flowcharts of FIGS. 7, 8, and 9.
In step S <b> 701, the CPU 205 determines whether the modem circuit 204 has received a command from the power supply apparatus 100. When the CPU 205 determines that the modem circuit 204 has not received a command from the power supply apparatus 100 (No in S701), this flowchart ends. When the CPU 205 determines that the modem circuit 204 has received a command from the power supply apparatus 100 (Yes in S701), the process proceeds from S701 to S702.

  In step S <b> 702, the CPU 205 controls the modem circuit 204 so that the modem circuit 204 analyzes the command received from the power supply apparatus 100. In this case, the flowchart proceeds from S702 to S703. When the command analysis by the modem circuit 204 is completed, the modem circuit 204 supplies the analysis result to the CPU 205.

  In step S <b> 703, the CPU 205 determines whether an error has been detected from the analysis result supplied from the modem circuit 204. If the CPU 205 determines that an error has been detected from the analysis result supplied from the modem circuit 204 (Yes in S703), the process proceeds from S703 to S704. If the CPU 205 determines that no error is detected from the analysis result supplied from the modem circuit 204 (No in S703), the process proceeds from S703 to S705.

  In step S704, the CPU 205 performs error processing to be described later. When the error processing is performed by the CPU 205, this flowchart ends.

  In step S <b> 705, the CPU 205 determines whether the command received by the modem circuit 204 is the first command from the analysis result supplied from the modem circuit 204. When the CPU 205 determines that the command received by the modem circuit 204 is not the first command (No in S705), the process proceeds from S705 to S707. When the CPU 205 determines that the command received by the modem circuit 204 is the first command (Yes in S705), the process proceeds from S705 to S706.

  In step S <b> 706, the CPU 205 controls the modulation / demodulation circuit 204 to perform load modulation for transmitting the device information recorded in the ROM 206 as a response signal to the first command to the power supply apparatus 100. When the device information of the electronic device 200 is transmitted to the power supply apparatus 100, this flowchart ends.

  In step S <b> 707, the CPU 205 determines whether the command received by the modem circuit 204 is the second command from the analysis result supplied from the modem circuit 204. When the CPU 205 determines that the command received by the modem circuit 204 is not the second command (No in S707), the process proceeds from S707 to S709. When the CPU 205 determines that the command received by the modem circuit 204 is the second command (Yes in S707), the process proceeds from S707 to S708.

  In step S <b> 708, the CPU 205 controls the modulation / demodulation circuit 204 to perform load modulation for transmitting the power reception capability information recorded in the ROM 206 as a response signal to the second command to the power supply apparatus 100. When the power reception capability information of the electronic device 200 is transmitted to the power supply apparatus 100, this flowchart ends.

  In step S <b> 709, the CPU 205 determines whether the command received by the modem circuit 204 is the third command from the analysis result supplied from the modem circuit 204. If the CPU 205 determines that the command received by the modem circuit 204 is not the third command (No in S709), the process proceeds from S709 to S711. When the CPU 205 determines that the command received by the modem circuit 204 is the third command (Yes in S709), the process proceeds from S709 to S710.

  In step S <b> 710, the CPU 205 controls the modulation / demodulation circuit 204 to perform load modulation for transmitting the remaining capacity information recorded in the RAM 207 to the power supply apparatus 100 as a response signal to the fourth command. When the remaining capacity information of the battery 210 is transmitted to the power supply apparatus 100, this flowchart ends.

  In step S <b> 711, the CPU 205 determines whether the command received by the modem circuit 204 is the fourth command from the analysis result supplied from the modem circuit 204. If the CPU 205 determines that the command received by the modem circuit 204 is not the fourth command (No in S711), the process proceeds from S711 to S801 in FIG. When the CPU 205 determines that the command received by the modem circuit 204 is the fourth command (Yes in S711), the process proceeds from S711 to S712.

  In step S <b> 712, the CPU 205 controls the modulation / demodulation circuit 204 to perform load modulation for transmitting untransmitted information recorded in the RAM 207 as a response signal to the fourth command to the power supply apparatus 100. When the untransmitted information of the battery 210 is transmitted to the power supply apparatus 100, this flowchart ends.

  In step S <b> 801, the CPU 205 determines whether the command received by the modem circuit 204 is the fifth command from the analysis result supplied from the modem circuit 204. When the CPU 205 determines that the command received by the modem circuit 204 is not the fifth command (No in S801), the process proceeds from S801 to S803. If the CPU 205 determines that the command received by the modem circuit 204 is the fifth command (Yes in S801), the process proceeds from S801 to S802.

  In step S <b> 802, the CPU 205 controls the modem circuit 204 to transmit a response signal indicating affirmation to the fifth command to the power supply apparatus 100. When a response signal to the fifth command is transmitted to the power feeding apparatus 100, the flowchart ends.

  In step S <b> 803, the CPU 205 determines whether the command received by the modem circuit 204 is the sixth command from the analysis result supplied from the modem circuit 204. When the CPU 205 determines that the command received by the modem circuit 204 is not the sixth command (No in S803), the process proceeds from S803 to S805. When the CPU 205 determines that the command received by the modem circuit 204 is the sixth command (Yes in S803), the process proceeds from S803 to S804.

  In step S804, the CPU 205 determines whether the battery 210 has a power receiving antenna. When the battery 210 has a power receiving antenna, the CPU 205 performs load modulation to transmit number information indicating that the number of power receiving means is two as a response signal to the sixth command to the power supply apparatus 100. The modem circuit 204 is controlled. In the case where the battery 210 includes a power receiving antenna, the number of power receiving units is two, that is, the power receiving antenna 201 and the power receiving antenna included in the battery 210. When the battery 210 does not have a power receiving antenna, the CPU 205 performs load modulation for transmitting the number information indicating that the number of power receiving means is 1 to the power supply apparatus 100 as a response signal to the sixth command. Thus, the modem circuit 204 is controlled. When the battery 210 does not have a power receiving antenna, the number of power receiving means is only one by the power receiving antenna 201. When the number information is transmitted to the power supply apparatus 100, this flowchart ends.

  In step S <b> 805, the CPU 205 determines whether the command received by the modem circuit 204 is the seventh command from the analysis result supplied from the modem circuit 204. If the CPU 205 determines that the command received by the modem circuit 204 is not the seventh command (No in S805), the process proceeds from S805 to S808. When the CPU 205 determines that the command received by the modem circuit 204 is the seventh command (Yes in S805), the process proceeds from S805 to S806.

  In step S <b> 806, the CPU 205 controls the modem circuit 204 to transmit a response signal indicating affirmation to the seventh command to the power supply apparatus 100. When a response signal to the seventh command is transmitted to the power supply apparatus 100, the flowchart proceeds from S806 to S807.

  In step S <b> 807, the CPU 205 controls the matching circuit 202 so that the frequency of the power receiving antenna 201 does not match the resonance frequency f of the power supply antenna 108. Thus, the CPU 205 can disable the power receiving antenna 201 and control the electronic device 200 not to receive the power transmitted from the power feeding apparatus 100 in a non-contact manner. In this case, this flowchart ends.

  In step S <b> 808, the CPU 205 determines whether the command received by the modem circuit 204 is the eighth command from the analysis result supplied from the modem circuit 204. If the CPU 205 determines that the command received by the modem circuit 204 is not the eighth command (No in S808), the process proceeds from S808 to S901 in FIG. When the CPU 205 determines that the command received by the modem circuit 204 is the eighth command (Yes in S808), the process proceeds from S808 to S809.

  In step S <b> 809, the CPU 205 controls the modulation / demodulation circuit 204 to perform load modulation for transmitting display data recorded in advance in the ROM 206 as a response signal to the eighth command to the power supply apparatus 100. In this case, the CPU 205 controls the modulation / demodulation circuit 204 to transmit a response signal indicating affirmation to the power supply apparatus 100, and transmits the display data recorded in advance in the ROM 206 to the power supply apparatus 100. May be controlled. When the display data is transmitted to the power supply apparatus 100, this flowchart ends.

  In step S <b> 901, the CPU 205 determines whether the command received by the modem circuit 204 is the ninth command from the analysis result supplied from the modem circuit 204. If the CPU 205 determines that the command received by the modem circuit 204 is not the ninth command (No in S901), the process proceeds from S901 to S904. When the CPU 205 determines that the command received by the modem circuit 204 is the ninth command (Yes in S901), the process proceeds from S901 to S902.

  In step S <b> 902, the CPU 205 controls the modem circuit 204 to transmit a response signal indicating affirmation to the ninth command to the power supply apparatus 100. When a response signal to the ninth command is transmitted to the power supply apparatus 100, the process proceeds from S902 to S903.

  In step S <b> 903, the CPU 205 controls the charging control unit 209 to start charging the battery 210. When charging of the battery 210 is started, this flowchart ends.

  In step S <b> 904, the CPU 205 determines whether the command received by the modulation / demodulation circuit 204 is 10 commands from the analysis result supplied from the modulation / demodulation circuit 204. When the CPU 205 determines that the command received by the modem circuit 204 is not the tenth command (No in S904), the process proceeds from S904 to S907. When the CPU 205 determines that the command received by the modem circuit 204 is the tenth command (Yes in S904), the process proceeds from S904 to S905.

  In step S <b> 905, the CPU 205 controls the modem circuit 204 to transmit a response signal indicating affirmation to the tenth command to the power supply apparatus 100. When a response signal to the tenth command is transmitted to the power supply apparatus 100, the process proceeds from S905 to S906.

  In step S <b> 906, the CPU 205 controls the charge control unit 209 to stop charging the battery 210. When the charging of the battery 210 is stopped, this flowchart ends.

  In step S907, the CPU 205 determines whether the command received by the modem circuit 204 is the eleventh command from the analysis result supplied from the modem circuit 204. If the CPU 205 determines that the command received by the modem circuit 204 is not the eleventh command (No in S907), the process proceeds from S907 to S910. When the CPU 205 determines that the command received by the modem circuit 204 is the eleventh command (Yes in S907), the process proceeds from S907 to S908.

  In step S <b> 908, the CPU 205 controls the modulation / demodulation circuit 204 to transmit a response signal indicating affirmation to the eleventh command to the power supply apparatus 100. When the response signal to the eleventh command is transmitted to the power supply apparatus 100, the process proceeds from S908 to S909.

  In step S <b> 909, the CPU 205 controls the recording unit 213 a to read predetermined video data recorded on the recording medium 213 b of the imaging unit 213 and transmits the read predetermined video data to the power supply apparatus 100. 212 is controlled. When the predetermined video data is transmitted to the power supply apparatus 100, this flowchart ends.

  In step S <b> 910, the CPU 205 determines whether the command received by the modem circuit 204 is the twelfth command from the analysis result supplied from the modem circuit 204. When the CPU 205 determines that the command received by the modem circuit 204 is not the twelfth command (No in S910), the process proceeds from S910 to S913. When the CPU 205 determines that the command received by the modem circuit 204 is the twelfth command (Yes in S910), the process proceeds from S910 to S911.

  In step S <b> 911, the CPU 205 controls the modem circuit 204 to transmit a response signal indicating affirmation to the twelfth command to the power supply apparatus 100. When a response signal to the eleventh command is transmitted to the power supply apparatus 100, the flowchart proceeds from S911 to S912.

  In step S <b> 912, the CPU 205 controls the recording unit 213 a to stop reading the predetermined video data recorded on the recording medium 213 b of the imaging unit 213, and does not transmit the read predetermined video data to the power supply apparatus 100. The communication unit 212 is controlled. When transmission of predetermined video data to the power supply apparatus 100 is stopped, this flowchart ends.

  In step S <b> 913, the CPU 205 performs processing according to the command code included in the analysis result supplied from the modem circuit 204. In this case, this flowchart ends.

(Error handling)
The error processing performed in S704 by the electronic device 200 will be described using the flowchart of FIG. Note that the error processing may be performed when the CPU 205 detects that an error has occurred in the electronic device 200 other than the processing in step S704. Note that the error occurring in the electronic device 200 may be an error occurring in the electronic device 200 or a communication error occurring between the power supply apparatus 100 and the electronic device 200. For example, when an abnormal current flows through the power receiving antenna 201, the CPU 205 detects that an error has occurred in the electronic device 200.

  In step S <b> 1001, the CPU 205 determines whether or not the battery 210 is charged by the charge control unit 209. If the CPU 205 determines that the battery 210 is being charged (Yes in S1001), the process proceeds from S1001 to S1002. When the CPU 205 determines that the battery 210 is not charged (No in S1001), the process proceeds from S1001 to S1003.

  In step S <b> 1002, the CPU 205 controls the charge control unit 209 to stop charging the battery 210. When the charging of the battery 210 is stopped, the process proceeds from S1002 to S1003.

  In step S <b> 1003, the CPU 205 determines whether video data or audio data is being transmitted to the power supply apparatus 100 via the communication unit 212. When the CPU 205 determines that the communication unit 212 is transmitting video data or audio data to the power supply apparatus 100 (Yes in S1003), the process proceeds from S1003 to S1004. When the CPU 205 determines that the communication unit 212 is not transmitting video data or audio data to the power supply apparatus 100 (No in S1003), the process proceeds from S1003 to S1005.

  In step S <b> 1004, the CPU 205 controls the communication unit 212 to stop transmission of video data and audio data to the power supply apparatus 100 by the communication unit 212. When the transmission of the video data by the communication unit 212 is stopped, the process proceeds from S1004 to S1005.

  In step S <b> 1005, the CPU 205 determines whether the modem circuit 204 has received a command. When the CPU 205 determines that the modem circuit 204 has not received a command (No in S1005), this flowchart ends. If the CPU 205 determines that the modem circuit 204 has received the command (Yes in S1005), the process proceeds from S1005 to S1006.

  In step S <b> 1006, the CPU 205 controls the modulation / demodulation circuit 204 to perform load modulation for transmitting the error information recorded in the ROM 206 in advance to the power supply apparatus 100 as a response signal to the command received by the modulation / demodulation circuit 204. When the error information is transmitted to the power supply apparatus 100, this flowchart ends.

  In step S <b> 1006, the CPU 205 transmits error information to the power supply apparatus 100 as a response signal to the command received by the modem circuit 204. However, the present invention is not limited to this, and when the command received by the modem circuit 204 is a specific command, the CPU 205 may transmit error information to the power supply apparatus 100 as a response signal to the specific command. The specific command may be a third command, for example.

  The command reception process shown in FIGS. 7 to 9 and the error process shown in FIG. 10 can be realized by the CPU 205 executing a computer program stored in the ROM 206.

(State transition diagram of electronic device 200)
The state transition of the electronic device 200 according to the first embodiment will be described with reference to the state transition diagram of FIG.

  In the state transition diagram shown in FIG. 11, the state 1100 is a mode in which the battery 210 is attached to the electronic device 200, and the operation mode of the electronic device 200 is a mode for receiving power transmitted from the power supply apparatus 100. State. When power is supplied from the power supply apparatus 100 to the CPU 205 via the power receiving antenna 201, the electronic device 200 transitions from the state 1100 to the state 1101.

  In the state 1101, the electronic device 200 controls the power receiving antenna 201 so as not to resonate at the same frequency as the resonance frequency f of the power feeding antenna 108 so that the power receiving antenna 201 does not receive the power transmitted from the power feeding device 100. . In this case, since the electronic device 200 cannot receive the first power and the second power from the power supply apparatus 100, the electronic device 200 can receive even if a command is transmitted from the power supply apparatus 100. Can not. Furthermore, the electronic device 200 stands by until a predetermined time is measured by the timer 211. When the timer 211 measures a certain time, the electronic device 200 resonates at the same frequency as the resonance frequency f of the power feeding antenna 108 so that the power receiving antenna 201 receives power transmitted from the power feeding device 100. Like that. As a result, the electronic apparatus 200 controls to receive the first power and the second power transmitted from the power supply apparatus 100 and receives a command transmitted from the power supply apparatus 100. When the predetermined time is measured by the timer 211, the electronic device 200 transitions from the state 1101 to the state 1102.

  In state 1102, the electronic device 200 determines whether or not the modem circuit 204 has received a command from the power feeding apparatus 100 via the power receiving antenna 201. When the electronic device 200 determines that the modem circuit 204 has received a command from the power supply apparatus 100, the electronic device 200 performs an operation specified by the command code included in the analysis result of the command supplied from the modem circuit 204. Furthermore, the electronic device 200 transmits a response signal to the command received by the modem circuit 204 to the power supply apparatus 100. When the electronic device 200 determines that the modem circuit 204 has not received a command from the power supply apparatus 100, the electronic device 200 transitions from the state 1102 to the state 1101.

When the electronic device 200 determines that the command received from the power supply apparatus 100 by the modem circuit 204 is the ninth command, the electronic device 200 transitions from the state 1102 to the state 1103.
When the modulation / demodulation circuit 204 determines that the command received from the power supply apparatus 100 is the eleventh command, the electronic device 200 determines whether the power of the electronic device 200 is on or off. In this case, when the electronic device 200 is powered on, the electronic device 200 transitions from the state 1102 to the state 1108. In this case, when the electronic device 200 is powered off, the electronic device 200 transitions from the state 1102 to the state 1107.

  In state 1103, electronic device 200 changes the operation mode of electronic device 200 to the charging mode. When the electronic device 200 shifts to the charging mode, the electronic device 200 determines whether or not the modulation / demodulation circuit 204 has received the eleventh command from the power supply apparatus 100 via the power receiving antenna 201. When the electronic device 200 receives the eleventh command from the power supply apparatus 100, the electronic device 200 transitions from the state 1103 to the state 1105. When the electronic device 200 has not received the eleventh command from the power supply apparatus 100, the electronic device 200 transitions from the state 1103 to the state 1104. In the state 1103, when an AC power source (not shown) and the electronic device 200 are connected, when the power is supplied from the AC power source (not shown), the electronic device 200 transits from the state 1103 to the state 1101. In state 1103, when battery 210 is removed from electronic device 200, electronic device 200 transitions from state 1103 to state 1101. Note that the charging mode is a mode in which the charging controller 209 charges the battery 210 with the electric power received by the electronic device 200 from the power supply apparatus 100 in a contactless manner.

  In the state 1104, the electronic device 200 causes the charge control unit 209 to start charging the battery 210. In the state 1104, when an AC power source (not shown) and the electronic device 200 are connected, when the power is supplied from the AC power source (not shown), the electronic device 200 transits from the state 1104 to the state 1106. In state 1104, when battery 210 is removed from electronic device 200, electronic device 200 transitions from state 1104 to state 1106. In the state 1104, when the electronic device 200 determines that the remaining capacity of the battery 210 is fully charged, the electronic device 200 transitions from the state 1104 to the state 1106. In the state 1104, when the electronic device 200 determines that the modem circuit 204 has received the twelfth command, the electronic device 200 transitions from the state 1104 to the state 1106.

  In the state 1105, the electronic device 200 controls the communication unit 212 to transmit predetermined video data read from the recording medium 213b to the power supply apparatus 100, and controls the charging control unit 209 to start charging the battery 210. To do. In the state 1105, when an AC power source (not shown) and the electronic device 200 are connected, when the power is supplied from the AC power source (not shown), the electronic device 200 transits from the state 1105 to the state 1106. In state 1105, when battery 210 is removed from electronic device 200, electronic device 200 transitions from state 1105 to state 1106. In state 1105, when electronic device 200 determines that transmission of predetermined video data by communication unit 212 is complete and the remaining capacity of battery 210 is fully charged, the state transitions from state 1105 to state 1106.

  In state 1105, when electronic device 200 determines that modem circuit 204 has received the twelfth command from power supply apparatus 100, electronic device 200 transitions from state 1105 to state 1106. In the state 1105, when the electronic device 200 detects a communication error between the power supply apparatus 100 and the electronic device 200, the electronic device 200 transitions from the state 1105 to the state 1106.

  In state 1106, when the charging control unit 209 is charging the battery 210, the electronic device 200 controls the charging control unit 209 to stop charging the battery 210. Furthermore, when the communication unit 212 is transmitting predetermined video data to the power supply apparatus 100, the electronic device 200 controls the communication unit 212 to stop transmission of the predetermined video data to the power supply apparatus 100. In this case, the electronic device 200 transitions from the state 1106 to the state 1101.

  In the state 1107, the electronic device 200 supplies the power supplied from either the battery 210 or the power supply apparatus 100 to the communication unit 212, the recording unit 213a of the imaging unit 213, the recording medium 213b, and the ROM 206, and the charging control unit 209. To control. In this case, the electronic device 200 does not supply power to the imaging unit 213 other than the recording unit 213a and the recording medium 213b.

  In the state 1108, the electronic device 200 controls the communication unit 212 to transmit predetermined video data recorded in the recording medium 213b to the power supply apparatus 100. When the electronic device 200 determines that transmission of predetermined video data has been completed, the electronic device 200 transitions from the state 1108 to the state 1106. In addition, when the electronic device 200 determines that the remaining capacity of the battery 210 is equal to or less than the predetermined remaining capacity, the electronic device 200 transits from the state 1108 to the state 1106. The electronic device 200 also transitions from the state 1108 to the state 1106 when a communication error is detected between the communication unit 212 and the communication unit 112. In the state 1108, when an AC power source (not shown) and the electronic device 200 are connected, the electronic device 200 transits from the state 1108 to the state 1106 when power is supplied from the AC power source (not shown). In the state 1108, when the battery 210 is removed from the electronic device 200, the electronic device 200 transitions from the state 1108 to the state 1106.

Note that when the battery 210 is removed from the electronic device 200 in the states 1101 to 1108 other than the state 1104, the state 1105, and the state 1108, the electronic device 200 transitions to the state 1100. In the state 1108, when the electronic device 200 determines that the modem circuit 204 has received the twelfth command from the power supply apparatus 100, the electronic device 200 transitions from the state 1108 to the state 1106.
When the power of the electronic device 200 is changed from on to off, the electronic device 200 transitions from the state 1108 to the state 1107.

  In the present invention, the power supply device 100 supplies power to the electronic device 200 in a contactless manner, but the power supply device 100 supplies power to the electronic device 200 by wireless or wireless communication. The same can be applied.

  The predetermined video data described in the first embodiment may be replaced with audio data that the electronic device 200 has not transmitted to the power supply apparatus 100 (hereinafter referred to as “predetermined audio data”). To do. In this case, when the power supply mode of the power supply apparatus 100 is the second power supply mode, the power supply apparatus 100 outputs predetermined audio data received from the electronic device 200 from a speaker unit (not shown) or an external speaker. Also good.

  Thus, the power supply apparatus 100 according to the first embodiment, when there are a plurality of electronic devices for the power supply apparatus 100, according to at least one of untransmitted information and remaining capacity information acquired from each electronic device, The power supply target of the power supply apparatus 100 is selected. Accordingly, the power supply apparatus 100 preferentially selects an electronic device having video data that has not been transmitted to the power supply apparatus 100 as a power supply target. In this case, the power supply apparatus 100 is set to a mode for capturing video data from the electronic device while transmitting power for charging to the selected electronic device. Accordingly, the power supply apparatus 100 can appropriately supply power to an electronic device having video data that has not been transmitted to the power supply apparatus 100.

  In addition, when there are a plurality of electronic devices having video data that are not transmitted to the power supply device 100, the power supply device 100 according to the first embodiment is configured according to the remaining capacity of the battery attached to each electronic device. 100 power supply targets were selected. Thus, the power supply apparatus 100 preferentially selects an electronic device having video data not transmitted to the power supply apparatus 100 and having a small remaining battery capacity as a power supply target. In this case, the power supply apparatus 100 is set to a mode for capturing video data from the electronic device while transmitting power for charging to the selected electronic device.

  Accordingly, the power supply apparatus 100 can appropriately supply power to an electronic device that has video data that has not been transmitted to the power supply apparatus 100 and has a small remaining battery capacity.

  In addition, when there is no electronic device having video data that has not been transmitted to the power supply device 100, the power supply device 100 according to the first embodiment is configured according to the remaining capacity of the battery mounted on the electronic device. The power supply target was selected. As a result, the power supply apparatus 100 preferentially selects an electronic device having no video data not transmitted to the power supply apparatus 100 and having a small remaining battery capacity as a power supply target. In this case, the power supply apparatus 100 is set to a mode for transmitting power for charging to the selected electronic device without capturing video data from the selected electronic device.

  Therefore, the power supply apparatus 100 can appropriately supply power to an electronic device that does not have video data that has not been transmitted to the power supply apparatus 100 and has a small remaining battery capacity.

(Other examples)
The power supply apparatus 100 according to the present invention is not limited to the power supply apparatus 100 described in the first embodiment. Further, the electronic device 200 according to the present invention is not limited to the electronic device 200 described in the first embodiment. For example, the power supply apparatus 100 and the electronic device 200 according to the present invention can be realized by a system including a plurality of apparatuses.

  The various processes and functions described in the first embodiment can also be realized by a computer program. In this case, the computer program according to the present invention can be executed by a computer (including a CPU and the like), and realizes various functions described in the first embodiment.

  Needless to say, the computer program according to the present invention may realize various processes and functions described in the first embodiment by using an OS (Operating System) running on the computer.

  The computer program according to the present invention is read from a computer-readable recording medium and executed by the computer. As the computer-readable recording medium, a hard disk device, an optical disk, a CD-ROM, a CD-R, a memory card, a ROM, or the like can be used. The computer program according to the present invention may be provided from an external device to a computer via a communication interface and executed by the computer.

100 power supply device 200 electronic device

Claims (16)

A power supply device that transmits electric power in a contactless manner to an electronic device equipped with a battery,
First communication means for transmitting a predetermined power for charging the battery to the electronic device;
Second communication means for receiving data transmitted from the electronic device;
First determination means for determining whether or not the electronic device has predetermined data that the electronic device has not transmitted to the power supply device;
When the electronic device does not have the predetermined data, the first communication unit is controlled to transmit the predetermined power to the electronic device, and data is not received from the electronic device. Control means for controlling the second communication means,
When the electronic device has the predetermined data, the control means transmits a command for requesting the predetermined data to the electronic device, and transmits the predetermined power to the electronic device. A power supply apparatus that controls one communication unit and controls the second communication unit to receive the predetermined data from the electronic device. In accordance with a result of the determination by the first determination unit, further includes a selection unit that selects one electronic device from a plurality of electronic devices,
The control unit transmits the predetermined power to one electronic device selected by the selection unit, and does not transmit the predetermined power to an electronic device not selected by the selection unit. The power supply apparatus according to claim 1, wherein the first communication unit is controlled.   When there are a plurality of electronic devices that are determined to have the predetermined data by the first determination unit, the selection unit is configured to store a remaining battery attached to the electronic device that is determined to have the predetermined data. The power supply apparatus according to claim 2, wherein one electronic device is selected according to the capacity.   When there is one electronic device determined to have the predetermined data by the first determination unit, the selection unit selects the electronic device determined to have the predetermined data. The power feeding apparatus according to claim 2 or 3.   When there is no electronic device determined to have the predetermined data by the first determination unit, the selection unit may select a plurality of electronic devices according to the remaining capacity of the batteries attached to the plurality of electronic devices. 5. The power supply apparatus according to claim 2, wherein one electronic device is selected. A second determination unit that determines whether the electronic device selected by the selection unit has a power reception unit for receiving the predetermined power;
When the electronic device selected by the selection unit does not have the power receiving unit, the control unit does not transmit the predetermined power to the electronic device selected by the selection unit. 6. The power feeding device according to claim 2, wherein the power feeding device is controlled.   The power feeding apparatus according to claim 1, wherein the power feeding apparatus corresponds to electromagnetic field resonance.   The power supply apparatus according to claim 1, wherein the predetermined data is any one of video data and audio data. A power supply system including an electronic device equipped with a battery, and a power supply device that transmits electric power to the electronic device in a non-contact manner,
The power supply device includes a first communication unit configured to transmit a predetermined power for charging the battery to the electronic device;
Second communication means for receiving data transmitted from the electronic device;
First determination means for determining whether or not the electronic device has predetermined data that the electronic device has not transmitted to the power supply device;
When the electronic device does not have the predetermined data, the first communication unit is controlled to transmit the predetermined power to the electronic device, and data is not received from the electronic device. Control means for controlling the second communication means,
When the electronic device has the predetermined data, the control means transmits a command for requesting the predetermined data to the electronic device, and transmits the predetermined power to the electronic device. Controlling the first communication means, and controlling the second communication means to receive the predetermined data from the electronic device,
The power supply system, wherein the electronic device includes means for charging the battery according to the predetermined power received from the power supply apparatus. The power supply apparatus further includes a selection unit that selects one electronic device from a plurality of electronic devices according to a result of the determination by the first determination unit,
The control unit transmits the predetermined power to one electronic device selected by the selection unit, and does not transmit the predetermined power to an electronic device not selected by the selection unit. The power supply system according to claim 9, wherein the first communication unit is controlled.   When there are a plurality of electronic devices that are determined to have the predetermined data by the first determination unit, the selection unit is configured to store a remaining battery attached to the electronic device that is determined to have the predetermined data. The power supply system according to claim 10, wherein one electronic device is selected according to the capacity.   When there is one electronic device determined to have the predetermined data by the first determination unit, the selection unit selects the electronic device determined to have the predetermined data. The power supply system according to claim 10 or 11.   When there is no electronic device determined to have the predetermined data by the first determination unit, the selection unit may select a plurality of electronic devices according to the remaining capacity of the batteries attached to the plurality of electronic devices. The power supply system according to any one of claims 10 to 12, wherein one electronic device is selected. The power supply apparatus further includes a second determination unit that determines whether the electronic device selected by the selection unit includes a power reception unit for receiving the predetermined power,
When the electronic device selected by the selection unit does not have the power receiving unit, the control unit does not transmit the predetermined power to the electronic device selected by the selection unit. The power feeding system according to any one of claims 10 to 13, wherein the power feeding system is controlled.   The power feeding system according to claim 10, wherein the power feeding device corresponds to electromagnetic field resonance.   16. The power feeding apparatus according to claim 10, wherein the predetermined data is any one of video data and audio data.

Images