WO2022230714A1

WO2022230714A1 - Electronic apparatus and method for controlling electronic apparatus

Info

Publication number: WO2022230714A1
Application number: PCT/JP2022/018120
Authority: WO
Inventors: 光央小森谷
Original assignee: キヤノン株式会社
Priority date: 2021-04-28
Filing date: 2022-04-19
Publication date: 2022-11-03
Also published as: JP2022170272A

Abstract

An electronic apparatus includes a power transmission device and a control means. The power transmission device includes a power transmission means for transmitting power wirelessly to a power receiving device, and a receiving means for receiving a remaining battery amount in the power receiving device from the power receiving device. The control means controls a display to the effect that the power receiving device is charging on the basis of the remaining battery amount of the power receiving device.

Description

Electronic devices and methods of controlling electronic devices

The present disclosure relates to an electronic device and a control method for the electronic device.

　Technological development of wireless power transmission systems is widely carried out. Patent Literature 1 discloses a power transmitting device and a power receiving device conforming to a standard (WPC standard) established by the Wireless Power Consortium (WPC), a standardization body for wireless charging standards. When charging is completed based on this standard, the display of both the power transmission device and the power reception device changes to indicate the end of charging.

JP 2015-56959 A

The power transmitting device needs to detect whether a new power receiving device has been placed even after charging is complete. Therefore, after completing charging and stopping power transmission, the power transmitting device immediately transmits a signal for object detection, and then transmits a signal for detecting the power receiving device. When the power transmitting device transmits the latter signal, charging is completed, and the charging unit of the power receiving device still placed on the power transmitting device is activated, and power transmission from the power transmitting device to the power receiving device is resumed. Along with this, there are cases where a charging indication is displayed in a device equipped with a power transmission device. After that, the power transmission device detects full charge, stops power transmission again, and stops charging display. Since such an operation may be performed repeatedly, the user is annoyed by the repetition of charging display and non-display.

The purpose of the present disclosure is to appropriately control the indication that charging is in progress.

The electronic device is an electronic device having a power transmitting device and a control means, wherein the power transmitting device includes power transmitting means for wirelessly transmitting power to a power receiving device, and the remaining battery level of the power receiving device is transmitted to the power receiving device. and the control means controls display indicating that the power receiving device is being charged based on the remaining battery level of the power receiving device.

It is possible to appropriately control the indication that the battery is being charged.

It is a figure which shows the structural example of an electronic device. It is a figure which shows the structural example of a receiving device. It is a figure which shows the structural example of a power transmission apparatus. 1 is a sequence diagram of an electronic device, a power transmission device, and a power reception device; FIG. 1 is a sequence diagram of an electronic device, a power transmission device, and a power reception device; FIG. It is a figure which shows the example of a display of the display part of an electronic device. It is a figure which shows the example of a display of the display part of an electronic device. It is a figure which shows the example of a display of the display part of an electronic device. 6 is a flow chart showing a processing example of an electronic device; 1 is a sequence diagram of an electronic device, a power transmission device, and a power reception device; FIG.

(First embodiment)
Hereinafter, embodiments will be described in detail with reference to the drawings. Although multiple features are described in the embodiments, not all of these multiple features are essential, and multiple features may be combined arbitrarily. Furthermore, in the drawings, the same reference numerals are given to the same or similar structures.

[Configuration of electronic device]
FIG. 1 is a diagram showing a configuration example of an electronic device 102 according to the first embodiment. The electronic device 102 is a wireless power transmission system, and has a power receiving device 101 and a power transmitting device 100 in one example. The power transmitting apparatus 100 wirelessly transmits power to the power receiving apparatus 101 . The power receiving device 101 receives power from the power transmitting device 100 and charges an internal battery. The electronic device 102 is an electronic device that incorporates at least the power transmission device 100 . The electronic device 102 is, for example, an automobile or a camera. Electronic device 102 may be a smart phone, tablet personal computer (PC), laptop, robot, medical device, printer, headset, or other device.

[Device configuration]
FIG. 2 is a diagram showing a configuration example of the power receiving device 101 in FIG. Power receiving device 101 complies with the WPC standard, and includes control unit 200 , power receiving coil 201 , rectification unit 202 , voltage control unit 203 , communication unit 204 , charging unit 205 , and battery 206 . The control unit 200 controls the entire power receiving apparatus 101 . An example of the control unit 200 is a CPU. The power receiving coil 201 receives power from the power transmitting coil 304 ( FIG. 3 ) of the power transmitting device 100 . The rectifying unit 202 converts the AC voltage and AC current from the power transmitting coil 304 that receives power via the power receiving coil 201 into a DC voltage and a DC current. Voltage control unit 203 converts the level of the DC voltage input from rectifying unit 202 into a DC voltage level at which control unit 200, charging unit 205 and the like operate. Charging section 205 charges battery 206 with the DC voltage converted by voltage control section 203 . The communication unit 204 performs wireless charging control communication based on the WPC standard with the communication unit 305 ( FIG. 3 ) of the power transmission device 100 . This control communication is realized by load-modulating the AC voltage and AC current received by the receiving coil 201 .

Also, the power receiving device 101 may be built in another device (camera, smartphone, tablet PC, laptop, automobile, robot, medical device, or printer) different from the electronic device 102 .

FIG. 3 is a diagram showing a configuration example of the power transmission device 100 of FIG. Electronic device 102 includes power transmission device 100 , control unit 301 , and display unit 307 . The power transmission device 100 conforms to the WPC standard, and has a control unit 300 , a power supply unit 302 , a power transmission unit 303 , a power transmission coil 304 , a communication unit 305 and a memory 306 . The control unit 300 controls the entire power transmission device 100 . An example of the control unit 300 is a CPU. The power supply unit 302 supplies power to each functional block of the power transmission device 100 . The power supply unit 302 is, for example, a commercial power supply or a battery. The battery stores electric power supplied from a commercial power source.

The power transmission unit 303 converts the DC or AC power input from the power supply unit 302 into AC power in the frequency band used for wireless power transmission, and inputs the AC power to the power transmission coil 304 , thereby power receiving the power receiving apparatus 101 . Generate electromagnetic waves to For example, the power transmission unit 303 converts the DC voltage supplied by the power supply unit 302 into an AC voltage with a half-bridge or full-bridge switching circuit using field effect transistors (FETs). In this case, the power transmission section 303 includes a gate driver that controls on/off of the FET.

In addition, the power transmission unit 303 controls the intensity of the electromagnetic wave to be output by adjusting the voltage (transmission voltage), the current (transmission current), or both of them input to the power transmission coil 304 or the frequency. When the power transmission unit 303 increases the power transmission voltage or power transmission current, the strength of the electromagnetic waves increases, and when the power power transmission unit 303 decreases the power transmission voltage or power transmission current, the strength of the electromagnetic waves decreases. Further, the control unit 300 controls the power transmission unit 303 so that the power transmission of the power transmission coil 304 is started or stopped, and controls the AC power output of the power transmission unit 303 . In addition, the power transmission unit 303 has the capability to supply enough power to output power of 15 watts (W) to the charging unit 205 of the power receiving apparatus 101 compliant with the WPC standard.

The communication unit 305 performs communication for power transmission control based on the WPC standard with the power receiving apparatus 101 via the power transmission coil 304 . The communication unit 305 frequency-modulates (frequency-shift-keys) the alternating voltage and alternating current output from the power transmission unit 303, transmits information to the power receiving apparatus 101, and performs communication. Further, the communication unit 305 demodulates the AC voltage and AC current modulated by the communication unit 204 of the power receiving apparatus 101 to acquire information transmitted by the power receiving apparatus 101 . That is, the communication unit 305 performs communication by superimposing a signal on the electromagnetic waves transmitted by the power transmission unit 303 . In addition, the communication unit 305 may communicate with the power receiving apparatus 101 by communication according to a standard different from the WPC standard using a coil (or antenna) different from the power transmission coil 304, or selectively perform a plurality of communications. may be used to communicate with the power receiving apparatus 101 .

In addition to storing control programs, the memory 306 can also store the states of the power transmitting device 100 and the power receiving device 101 . For example, the state of the power transmission device 100 is acquired by the control unit 300 . The state of the power receiving device 101 is acquired by the control unit 200 of the power receiving device 101 . The control unit 300 receives the state of the power receiving apparatus 101 from the power receiving apparatus 101 via the communication unit 305 .

The display unit 307 displays the state of the power transmitting device 100 itself or the state of the electronic device 102 including the power transmitting device 100 and the power receiving device 101 as shown in FIG. 1 and notifies the user. In the present embodiment, the display unit 307 will be described as an example of a display, but other configurations may be used as long as it notifies the user of the above state, such as a speaker for outputting sound, a vibration generating circuit, or an LED. may

The control unit 301 is a control unit mounted in the electronic device 102 incorporating the power transmission device 100 and controls the display unit 307 . Control unit 301 also has a wired or wireless communication path with control unit 300 of power transmission device 100 and receives information on power transmission device 100 and power reception device 101 .

FIG. 4A is a sequence diagram of the power transmission device 100 and the power reception device 101 according to this embodiment. First, using the sequence diagram of FIG. 4A, the flow of the control method for the power transmitting device 100 and the power receiving device 101 conforming to the WPC standard v1.2.3 will be described.

In step F400, the power transmission device 100 transmits Analog Ping to detect an object existing near the power transmission coil 304. Analog Ping is pulsed power and power for detecting an object. Also, the Analog Ping is so weak that even if the power receiving apparatus 101 receives the Analog Ping, the control unit 200 of the power receiving apparatus 101 cannot be activated. The power transmission device 100 detects an object based on a shift in the resonance frequency of the voltage value inside the power transmission coil 304 caused by an object existing near the power transmission coil 304 or a change in the voltage value or current value of the power transmission coil 304 .

In step F401, when the power transmission device 100 detects an object by Analog Ping, it measures the Q value of the power transmission coil 304 by Q value measurement. In step F402, the power transmission device 100 starts power transmission of Digital Ping following Q value measurement. The Digital Ping is power for activating the control unit 200 of the power receiving device 101, and is greater power than the Analog Ping. Also, Digital Ping is continuously transmitted thereafter. That is, the power transmitting apparatus 100 continues to transmit power equal to or greater than the Digital Ping from the start of power transmission of the Digital Ping (step F402) until an EPT packet (described later) is received from the power receiving apparatus 101 (step F422).

In step F403 , when the power receiving apparatus 101 receives the Digital Ping and is activated, it transmits to the power transmitting apparatus 100 Signal Strength, which is a packet containing the voltage value of the received Digital Ping.

Subsequently, in step F404 , the power receiving apparatus 101 transmits to the power transmitting apparatus 100 version information of the WPC standard with which the power receiving apparatus 101 complies and an ID including device identification information. In step F405 , the power receiving apparatus 101 transmits to the power transmitting apparatus 100 a configuration packet in which information including the maximum value of power to be supplied to the load (charging unit 205 ) is stored.

In step F406, the power transmitting apparatus 100 determines from the ID and the configuration packet that the power receiving apparatus 101 supports the extended protocol (including Negotiation, which will be described later) of the WPC standard v1.2 or later. Then, the power transmitting apparatus 100 responds to the power receiving apparatus 101 with ACK for the configuration packet.

In step F407, upon receiving ACK, the power receiving apparatus 101 transitions to the Negotiation phase in which power to be transmitted and received is negotiated. First, the power receiving apparatus 101 transmits FOD Status to the power transmitting apparatus 100 . In this embodiment, FOD Status is expressed as FOD (Q1).

In step F408, the power transmitting apparatus 100 performs foreign object detection based on the first foreign object detection method using the Q value stored in FOD (Q1) and the Q value measured in the above Q value measurement. to the power receiving apparatus 101, indicating that it has been determined that the

In step F409, when the power receiving apparatus 101 receives ACK, it negotiates Guaranteed Power, which is the maximum value of power that the power receiving apparatus 101 requests to receive. Guaranteed Power is the load power of the power receiving device 101 (the power consumed by the load), which is agreed upon between the power transmitting device 100 and the power receiving device 101 . Specifically, the power receiving apparatus 101 transmits to the power transmitting apparatus 100 a packet containing the above-mentioned Guaranteed Power value requested by the power receiving apparatus 101 among the Specific Requests defined by the WPC standard. In this embodiment, this packet is expressed as SRQ (GP).

In step F410, the power transmitting apparatus 100 responds to the above SRQ (GP) packet to the power receiving apparatus 101 in consideration of its own power transmission capability. Specifically, the power transmitting apparatus 100 determines that the guaranteed power can be accepted, and transmits an ACK indicating acceptance of the above request to the power receiving apparatus 101 . In this embodiment, it is assumed that the power receiving apparatus 101 requests 15 watts as guaranteed power in SRQ (GP).

In step F411, the power receiving apparatus 101, after completing the negotiation of a plurality of parameters including Guaranteed Power, transmits to the power transmitting apparatus 100 an SRQ (EN) requesting the end of negotiation among Specific Requests. The end of this negotiation is End Negotiation.

In step F412, the power transmitting apparatus 100 transmits ACK to the above SRQ(EN) to the power receiving apparatus 101. Then, the power transmission device 100 ends Negotiation and transitions to the Power Transfer phase in which the power specified by the Guaranteed Power is transmitted and received.

Subsequently, the power transmitting device 100 and the power receiving device 101 perform second foreign object detection based on the power loss calculated from the transmitted power and the received power. In this embodiment, a Received Power Packet (mode 1) packet is expressed as RP1, and a Received Power Packet (mode 2) packet is expressed as RP2.

In step F413, the power receiving apparatus 101 transmits RP1 to the power transmitting apparatus 100. The power transmitting device 100 receives RP1 from the power receiving device 101 .

In step F414, the power transmitting apparatus 100 transmits to the power receiving apparatus 101 an ACK indicating acceptance of the received power value stored in RP1 and the transmitted power value of the power transmitting apparatus 100 at that time as calibration data points.

In step F415, the power receiving apparatus 101 transmits to the power transmitting apparatus 100 a Control Error (hereinafter referred to as CE) requesting the power transmitting apparatus 100 to increase or decrease the received voltage (received current or received power). . CE stores a sign and a numerical value, where a positive sign means a request to increase power, a negative sign means a request to decrease power, and a zero value means a request to reduce power. means to require maintenance. For example, the power receiving apparatus 101 transmits CE(+) indicating power up to the power transmitting apparatus 100 .

In step F416, upon receiving CE(+), the power transmission device 100 changes the setting value of the power transmission unit 303 that supplies the received power to the load, and increases the power transmission.

In step F417 , when the received power increases in response to CE(+), the power receiving apparatus 101 supplies the received power to the load and transmits RP2 to the power transmitting apparatus 100 .

In step F418, the power transmitting apparatus 100 transmits ACK for RP2 to the power receiving apparatus 101. The above is the description of the calibration process. After that, the power transmitting device 100 performs foreign object detection based on the second foreign object detection method.

At this point, the power transmitting device 100 and the power receiving device 101 have transitioned to the Power Transfer phase. The power transmitting apparatus 100 transmits power that can receive up to 15 watts of power negotiated by the power receiving apparatus 101 in the Negotiation phase.

In step F419, the power receiving apparatus 101 transmits CE indicating an increase or decrease in received power to the power transmitting apparatus 100. For example, the power receiving apparatus 101 transmits CE(+) indicating power up to the power transmitting apparatus 100 .

In step F420, the power transmitting apparatus 100 transmits to the power receiving apparatus 101 a Received Power Packet (mode 0) containing the current received power value. In this embodiment, Received Power Packet (mode 0) is expressed as RP0. The power transmitting apparatus 100 periodically transmits CE in step F419 and RP0 in step F420 to the power receiving apparatus 101 .

In step F421, upon receiving RP0 from the power receiving apparatus, the power transmitting apparatus 100 performs foreign object detection based on the second foreign object detection method (power loss method) based on the power loss calculated from the transmitted power and the received power. As a result of the foreign object detection, the power transmitting apparatus 100 transmits to the power receiving apparatus 101 an ACK indicating that it is highly likely that there is no foreign object.

In step F422, when the charging ends, the power receiving apparatus 101 transmits to the power transmitting apparatus 100 an End Power Transfer (EPT) packet requesting to stop power transmission.

Upon receiving the EPT packet, the power transmission device 100 stops power transmission, returns to step F400 already described, and repeats the same operation. The above is the flow of the control method for the power transmitting device 100 and the power receiving device 101 compliant with the WPC standard v1.2.3.

[Problem of this embodiment]
FIG. 4B is a sequence diagram showing a control method for the electronic device 102, the power transmission device 100, and the power reception device 101. As shown in FIG. A problem of this embodiment will be described with reference to FIG. 4B. It should be noted that steps that have already been described with reference to FIG. 4A may be given the same reference numerals, and their description may be omitted.

In step F400, the power transmitting apparatus 100 transmits Analog Ping to the power receiving apparatus 101. In step F423, the power transmitting apparatus 100 and the power receiving apparatus 101 perform the processes of steps F401 to F416 in FIG. 4A already described, transition to the Power Transfer phase, and start power transmission.

In step F424 , the power receiving apparatus 101 transmits to the power transmitting apparatus 100 a Charge Status Packet indicating the remaining battery level of the battery 206 . Charge Status Packet is expressed as CSP in this embodiment. For example, the power receiving apparatus 101 transmits CPS (90%) to the power transmitting apparatus 100 . CPS (90%) is a CSP that includes information that the remaining battery capacity of the battery 206 is 90%.

In step F431, the power transmission device 100 notifies the control unit 301 of the electronic device 102 that the remaining battery capacity of the battery 206 is 90%. In step F432, the power transmitting apparatus 100 notifies the control unit 301 of the electronic device 102 that power is being transmitted to the power receiving apparatus 101 (that is, the battery 206 is being charged).

In step F433, the control unit 301 of the electronic device 102 displays the remaining battery level of the battery 206 on the display unit 307 based on the notification in step F431. In step F434, the control unit 301 of the electronic device 102 displays on the display unit 307 that the battery 206 is being charged based on the notification in step F432.

Here, display examples of the display unit 307 will be described using FIGS. 5A to 5C. A display unit 307 displays a battery icon 500 and a remaining battery level 501 . A remaining battery level 501 next to the battery icon 500 indicates the remaining battery level of the battery 206 of the power receiving apparatus 101 . In addition, the display unit 307 can display a charging icon 502 . Charging icon 502 indicates that battery 206 is being charged.

That is, according to the display in FIG. 5A, the remaining battery level 501 of the battery 206 is 100%, and the battery 206 is not being charged. Further, according to the display of FIG. 5B, the remaining battery capacity 501 of the battery 206 is 90%, and the battery 206 is being charged.

Return to the description of Fig. 4B. In step F433, the control unit 301 of the electronic device 102 displays on the display unit 307 that the remaining battery capacity 501 of the battery 206 is 90%, as shown in FIG. 5B. In step F434, the control unit 301 of the electronic device 102 displays a charging icon 502 indicating that the battery 206 is being charged on the display unit 307, as shown in FIG. 5B.

In steps F425 and F426, the power receiving apparatus 101 periodically transmits the CSP to the power transmitting apparatus 100. In steps F435 to F438, the power transmission device 100 notifies the control unit 301 of the electronic device 102 of the remaining battery level and whether power transmission is in progress or stopped based on the received CPS. The control unit 301 of the electronic device 102 reflects the notified remaining battery amount in the remaining battery amount 501 of the display unit 307 each time.

In step F425, the power receiving apparatus 101 transmits to the power transmitting apparatus 100 CSP (98%) including information that the remaining battery level of the battery 206 is 98%. In step F435, the power transmission device 100 notifies the control unit 301 of the electronic device 102 that the remaining battery capacity of the battery 206 is 98%. In step F436, the power transmitting apparatus 100 notifies the control unit 301 of the electronic device 102 that power is being transmitted to the power receiving apparatus 101 (that is, the battery 206 is being charged). The control unit 301 displays on the display unit 307 a charging icon 502 indicating that the battery level 501 of the battery 206 is 98% and that the battery 206 is being charged.

In step F426, the power receiving apparatus 101 transmits, to the power transmitting apparatus 100, CSP (100%) including information that the battery level of the battery 206 is 100%. In step F422, the power receiving apparatus 101 sends an EPT packet requesting the power transmitting apparatus 100 to stop power transmission because the remaining battery level of the battery 206 is 100% and the battery 206 no longer needs to be charged. Send. Upon receiving the EPT packet, the power transmitting apparatus 100 stops power transmission to the power receiving apparatus 101 .

In step F437, the power transmission device 100 notifies the control unit 301 of the electronic device 102 that the remaining battery capacity of the battery 206 is 100%. In step F438, the power transmission apparatus 100 notifies the control unit 301 of the electronic device 102 that power transmission has been stopped due to the reception of the EPT packet.

In step F439, the control unit 301 of the electronic device 102 displays on the display unit 307 that the battery remaining amount 501 of the battery 206 is 100% and that the battery 206 is not being charged, as shown in FIG. 5A. do. Control unit 301 displays that battery 206 is not being charged by stopping the display of charging icon 502 .

Immediately after step F438, in step F400, the power transmitting apparatus 100 transmits the next Analog Ping to the power receiving apparatus 101. In step F423, the power transmitting apparatus 100 and the power receiving apparatus 101 perform the processes of steps F401 to F416 in FIG. 4A already described, transition to the Power Transfer phase, and start power transmission.

The remaining battery capacity of the battery 206 is 100% because almost no time has passed since it reached 100%.

In step F427, the power receiving apparatus 101 transmits to the power transmitting apparatus 100 CSP (100%) including information that the remaining battery level of the battery 206 is 100%. In step F440, the power transmission device 100 notifies the control unit 301 of the electronic device 102 that the remaining battery capacity of the battery 206 is 100%. In step F441, the power transmitting apparatus 100 notifies the control unit 301 of the electronic device 102 that power is being transmitted to the power receiving apparatus 101 (that is, the battery 206 is being charged).

In step F442, the control unit 301 of the electronic device 102 displays on the display unit 307 that the remaining battery level 501 of the battery 206 is 100%, as shown in FIG. 5C. In step F443, the control unit 301 of the electronic device 102 displays a charging icon 502 indicating that the battery 206 is being charged on the display unit 307, as shown in FIG. 5C.

In step F422, the power receiving apparatus 101 transmits an EPT packet requesting to stop power transmission to the power transmitting apparatus 100 because the remaining battery level of the battery 206 is 100% and charging is unnecessary. Upon receiving the EPT packet, the power transmitting apparatus 100 stops power transmission to the power receiving apparatus 101 .

In step F444, the power transmission device 100 notifies the control unit 301 of the electronic device 102 that power transmission has been stopped due to the reception of the EPT packet. In step F445, the control unit 301 of the electronic device 102 displays on the display unit 307 that the battery remaining amount 501 of the battery 206 is 100% and that the battery 206 is not being charged, as shown in FIG. 5A. do. Control unit 301 displays that battery 206 is not being charged by stopping the display of charging icon 502 .

Immediately after step F444, in step F400, the power transmitting apparatus 100 transmits the next Analog Ping to the power receiving apparatus 101. After that, the electronic device 102, the power transmitting apparatus 100, and the power receiving apparatus 101 repeat the above processing. Then, as described above, the display unit 307 repeats the display of FIG. 5C indicating that charging is in progress in steps F442 and F443 and the display of FIG. 5A indicating that charging is not in progress in step F445 at short intervals. . This is an annoyance and a problem for the user in terms of usability of the electronic device 102 .

[Processing of electronic device 102 according to the present embodiment]
Processing of the electronic device 102 according to this embodiment for solving the above-described problem will be described with reference to FIGS. 6 and 7. FIG. FIG. 6 is a flowchart illustrating the flow of control processing for displaying the charging icon 502 of the power transmitting apparatus 100 and the electronic device 102 according to this embodiment.

In step S600 , the power receiving apparatus 101 transmits information on the remaining battery level of the battery 206 to the power transmitting apparatus 100 . The power transmitting apparatus 100 receives information on the remaining battery level of the battery 206 from the power receiving apparatus 101 . Information on the remaining battery level is transmitted from the power receiving apparatus 101 in a Charge Status Packet. Here, the remaining battery capacity is a value indicated by the ratio of the remaining battery capacity to the energy in the fully charged state as 100%.

In step S601 , the power transmission device 100 notifies the control unit 301 of the electronic device 102 of the received remaining battery level information of the battery 206 . The control unit 301 of the electronic device 102 displays the remaining battery amount 501 on the display unit 307 based on the remaining battery amount information of the battery 206 .

In step S602, the control unit 301 of the electronic device 102 determines whether the display unit 307 is in a state where the display of the charging icon 502 is stopped. If the display unit 307 displays the charging icon 502 (NO in S602), the process transitions to step S604.

In step S604, the control unit 301 of the electronic device 102 determines whether the remaining battery level of the battery 206 is equal to or greater than a predetermined display stop threshold. The display stop threshold is a value set for the purpose of determining whether the battery 206 is nearly fully charged, and is, for example, 97%. If the battery remaining amount of the battery 206 is equal to or greater than the display stop threshold (YES in S604), the process transitions to step S620. If the battery remaining amount of the battery 206 is less than the display stop threshold (NO in S604), the process transitions to step S605.

In step S620, the control unit 301 of the electronic device 102 stops displaying the charging icon 502 on the display unit 307, and the electronic device 102 ends the processing of the flowchart of FIG. Thus, the control unit 301 stops displaying the charging icon 502 on the display unit 307 when the battery 206 is nearly fully charged.

On the other hand, if the remaining battery capacity of the battery 206 is less than the display stop threshold in step S604, the process transitions to step S605. In step S605 , the control unit 301 of the electronic device 102 determines whether the power transmitting device 100 has received an EPT (End Power Transfer) packet from the power receiving device 101 . If the power transmission device 100 has not received an EPT packet (NO in S605), the process transitions to step S630.

In step S630, the control unit 301 of the electronic device 102 displays (continues) the charging icon 502 on the display unit 307, and the process returns to step S600. In step S605, when the power transmitting apparatus 100 receives an EPT packet, the electronic device 102 ends the processing of the flowchart of FIG.

In step S602, if the display unit 307 stops displaying the charging icon 502 (YES in S602), the process proceeds to step S603. In step S603, the control unit 301 of the electronic device 102 determines whether the remaining battery level of the battery 206 is equal to or less than a predetermined display restart threshold. The display restart threshold is a value set for the purpose of determining that the battery 206 is no longer in a nearly fully charged state, and is, for example, 92%. Note that the display restart threshold is set in advance to a value equal to or lower than the display stop threshold in order to extend the time interval at which the charging icon 502 is repeatedly displayed/hidden.

If the remaining battery capacity of the battery 206 is equal to or less than the display restart threshold (YES in S603), the process transitions to step S605. If the battery remaining amount of the battery 206 is not equal to or less than the display restart threshold (NO in S603), the process transitions to step S620.

In step S605 , the control unit 301 of the electronic device 102 determines whether the power transmitting device 100 has received an EPT (End Power Transfer) packet from the power receiving device 101 . If the power transmission device 100 has not received an EPT packet (NO in S605), the process transitions to step S630. In step S630, the control unit 301 of the electronic device 102 restarts the stopped display of the charging icon 502 on the display unit 307, and the process returns to step S600.

In step S605, if the power transmission apparatus 100 has received an EPT packet (YES in step S605), the electronic device 102 does not restart the display of the charging icon 502 because the power transmission of the power transmission apparatus 100 is stopped. end the processing of the flow chart.

As described above, the control unit 301 of the electronic device 102 restarts the display of the charging icon 502 when the battery 206 is no longer in a state close to the fully charged state, so that the user can appropriately see the charging state. can be recognized.

FIG. 7 is a sequence diagram showing the processing of the electronic device 102, the power transmitting device 100, and the power receiving device 101 according to this embodiment, and is a sequence diagram when the processing of the flowchart of FIG. 6 is applied. In the description of FIG. 7, the steps that have already been described with reference to FIGS. 4A and 4B are given the same reference numerals, and the description thereof will be omitted.

In step F424, the power receiving apparatus 101 transmits to the power transmitting apparatus 100 a CSP (90%) including information that the remaining battery level of the battery 206 is 90%. In step F431, the power transmission device 100 notifies the control unit 301 of the electronic device 102 that the remaining battery capacity of the battery 206 is 90%. In step F432, the power transmitting apparatus 100 notifies the control unit 301 of the electronic device 102 that power is being transmitted to the power receiving apparatus 101 (that is, the battery 206 is being charged).

In steps F433 and S601, the control unit 301 of the electronic device 102 displays on the display unit 307 that the remaining battery level 501 of the battery 206 is 90%, as shown in FIG. 5B.

In step S602, the display unit 307 stops displaying the charging icon 502, so the determination in step S602 is YES, and the process proceeds to step S603. In step S603, the battery remaining amount (90%) of the battery 206 is equal to or less than the display restart threshold value (92%), so the determination in step S603 is YES, and the process proceeds to step S605. Since the power transmitting apparatus 100 has not received the EPT packet in step S605, NO is determined in step S605, and the process transitions to step S630. In steps S630 and F434, control unit 301 of electronic device 102 displays charging icon 502 indicating that battery 206 is being charged on display unit 307, as shown in FIG. 5B.

In step F425, the power receiving apparatus 101 transmits to the power transmitting apparatus 100 CSP (98%) including information that the remaining battery level of the battery 206 is 98%. In step F435, the power transmission device 100 notifies the control unit 301 of the electronic device 102 that the remaining battery capacity of the battery 206 is 98%. In step F436, the power transmitting apparatus 100 notifies the control unit 301 of the electronic device 102 that power is being transmitted to the power receiving apparatus 101 (that is, the battery 206 is being charged).

In step S601, the control unit 301 of the electronic device 102 displays on the display unit 307 that the remaining battery level 501 of the battery 206 is 98%. In step S602, since the display unit 307 is displaying the charging icon 502, NO is determined in step S602, and the process proceeds to step S604. In step S604, since the remaining battery capacity (98%) of the battery 206 is equal to or greater than the display stop threshold (97%), YES is determined in step S604, and the process transitions to step S620. In steps S620 and F450 , control unit 301 of electronic device 102 stops displaying charging icon 502 on display unit 307 .

In step S601, the control unit 301 of the electronic device 102 displays on the display unit 307 that the remaining battery level 501 of the battery 206 is 100%, as shown in FIG. 5A. In step S602, the display unit 307 stops displaying the charging icon 502, so the determination in step S602 is YES, and the process proceeds to step S603. In step S603, since the remaining battery capacity (100%) of the battery 206 is not equal to or less than the display restart threshold value (92%), NO is determined in step S603, and the process transitions to step S620. In step S620, the control unit 301 of the electronic device 102 continues to stop displaying the charging icon 502 on the display unit 307 as shown in FIG. 5A. The display unit 307 performs the display of FIG. 5A.

In steps F442 and S601, the control unit 301 of the electronic device 102 continues displaying on the display unit 307 that the remaining battery level 501 of the battery 206 is 100%, as shown in FIG. 5A. In step S602, the display unit 307 stops displaying the charging icon 502, so the determination in step S602 is YES, and the process proceeds to step S603. In step S603, since the remaining battery capacity (100%) of the battery 206 is not equal to or less than the display restart threshold value (92%), NO is determined in step S603, and the process transitions to step S620. In step S620, the control unit 301 of the electronic device 102 continues to stop displaying the charging icon 502 on the display unit 307 as shown in FIG. 5A. The display unit 307 continues the display of FIG. 5A. That is, instead of performing step F443 described above, the display of the charging icon 502 continues to be stopped.

In step F444, the power transmission device 100 notifies the control unit 301 of the electronic device 102 that power transmission has been stopped due to the reception of the EPT packet. The display unit 307 continues the display of FIG. 5A. That is, instead of performing step F445 described above, the display of the charging icon 502 continues to be stopped.

Immediately after step F444, in step F400, the power transmitting apparatus 100 transmits the next Analog Ping to the power receiving apparatus 101. After that, the electronic device 102, the power transmitting apparatus 100, and the power receiving apparatus 101 repeat the above processing. Accordingly, as described above, the display unit 307 continues the display of FIG. 5A after the transmission of steps F437 and F438. As a result, the electronic device 102 can solve the problem of repeating the display of FIG. 5C and the display of FIG. 5A in a short cycle, as shown in FIG. 4B.

As described above, in this embodiment, in step F422, the power transmission device 100 receives the EPT packet, stops power transmission, and immediately transmits the next Analog Ping. Even in such a case, the display on the display unit 307 does not change from the display in FIG. 5A. In this way, the display unit 307 can prevent the charging icon 502 from being repeatedly displayed and hidden in a short period of time, thereby reducing the user's annoyance.

In this embodiment, the power receiving apparatus 101 periodically transmits the CSP to the power transmitting apparatus 100 in the Power Transfer phase, but may be irregular.

Also, the power transmitting apparatus 100 may periodically or irregularly request the power receiving apparatus 101 for a CSP, and the power receiving apparatus 101 may notify the power transmitting apparatus 100 of the CSP corresponding to the request. As a requesting method, there is a method of transmitting a request packet from the power transmitting apparatus 100 to the power receiving apparatus 101 . This request packet is a packet indicating that the power transmitting apparatus 100 requests the power receiving apparatus 101 to operate. After that, the power transmitting apparatus 100 transmits a packet (requested operation identification packet) including identification information identifying the operation requested by the power receiving apparatus 101 . Note that these two operations may be performed in one packet. That is, the power transmitting apparatus 100 transmits to the power receiving apparatus 101 a packet that indicates that the power transmitting apparatus 100 requests an operation from the power receiving apparatus 101 and that includes identification information that identifies the requested operation. good. The power receiving device 101 that has received this request packet and the requested operation identification packet transmits the CSP to the power transmitting device 100 .

Further, the power transmitting apparatus 100 may request the power receiving apparatus 101 for a CSP when a predetermined condition is satisfied, and the power receiving apparatus 101 may notify the power transmitting apparatus 100 of the CSP corresponding to the request. For example, the predetermined condition is when the power transmitting apparatus 100 receives an EPT packet from the power receiving apparatus 101 multiple times (eg, twice) within a certain period of time (eg, 10 seconds). In this case, in step F422, the power transmission device 100 receives the EPT packet, stops power transmission, and immediately transmits the next Analog Ping, and it is considered necessary to avoid the state of FIG. 4B. . In such a case, the power transmitting device 100 may acquire the remaining battery level from the CSP, and the electronic device 102 may perform the control shown in FIG.

In the Negotiation phase, the power receiving apparatus 101 may notify the power transmitting apparatus 100 of the CSP, or the power transmitting apparatus 100 may request the power receiving apparatus 101 to transmit the CSP, and the power receiving apparatus 101 may request the power transmitting apparatus 100 to transmit the CSP. may notify the corresponding CSP.

In the present embodiment, an example is described in which predetermined fixed values are used as the display resumption threshold and the display stop threshold. good too. For example, for the power receiving apparatus 101 with a small capacity of the battery 206, the remaining amount of the battery 206 is likely to increase due to charging, so the display restart threshold is set to be small (eg, display restart threshold = 80%, display stop threshold = 97%). %). As a result, the time interval at which the charging icon 502 is repeatedly displayed and hidden can be extended. Therefore, the power receiving apparatus 101 may negotiate a lower display resumption threshold in Negotiation.

Further, the electronic device 102 may perform the following processing for the purpose of letting the user recognize that the power transmitting device 100 and the power receiving device 101 are operating normally. The electronic device 102 displays the charging icon 502 immediately after detecting that the power receiving apparatus 101 is placed in a state where the power transmitting apparatus 100 does not detect an object on the power transmitting apparatus 100 . may For example, this is the case where the power receiving apparatus 101 is detected after the power transmitting apparatus 100 has not detected an object by analog ping for a certain period of time. In such a case, for example, if the display restart threshold is temporarily set to 100%, the charging icon 502 can always be displayed. After that, when the remaining amount of the battery 206 of the power receiving apparatus 101 becomes equal to or greater than the display stop threshold, the electronic device 102 stops displaying the charging icon 502 . Also, the display restart threshold value is returned to the original set value.

As described above, the power transmission unit 303 wirelessly transmits power to the power receiving apparatus 101 .

The communication unit 305 functions as a receiving unit and a transmitting unit, and receives the remaining battery level of the power receiving device 101 from the power receiving device 101 . The remaining battery level of the power receiving apparatus 101 is the remaining battery level of the battery 206 and is an example of charging information of the power receiving apparatus 101 . For example, the communication unit 305 receives the remaining battery level of the power receiving apparatus 101 using a WPC standard Charge Status Packet.

The communication unit 305 receives from the power receiving apparatus 101 the remaining battery level of the power receiving apparatus 101 superimposed on the power transmitted by the power transmitting unit 303 . In that case, the communication unit 305 receives the remaining battery level of the power receiving apparatus 101 by ASK modulation (amplitude shift keying) or FSK modulation (frequency shift keying). Note that the communication unit 305 may receive the remaining battery level of the power receiving apparatus 101 according to the Bluetooth Low Energy standard.

The communication unit 305 periodically receives the remaining battery level of the power receiving apparatus 101 . Note that the communication unit 305 may transmit a request for the remaining battery level of the power receiving apparatus 101 to the power receiving apparatus 101 and receive the remaining battery level of the power receiving apparatus 101 corresponding to the request from the power receiving apparatus 101 . Further, when the communication unit 305 receives EPT packets (power transmission stop request) from the power receiving apparatus 101 a predetermined number of times within a certain period of time, the communication unit 305 requests the power receiving apparatus 101 for the remaining battery level of the power receiving apparatus 101 . You may send.

When the remaining battery level of the power receiving apparatus 101 satisfies the predetermined condition in step S603 or S604, the control unit 301 controls to stop displaying the charging icon 502 in step S620. A charging icon 502 is an icon indicating that the power receiving apparatus 101 is being charged. Specifically, when the remaining battery level of the power receiving apparatus 101 is greater than the display restart threshold or the display stop threshold, the control unit 301 controls to stop displaying the charging icon 502 in step S620.

Further, when the remaining battery level of the power receiving apparatus 101 satisfies the predetermined condition in step S603 or S604, the control unit 301 controls to display the charging icon 502 in step S630. Specifically, when the remaining battery level of the power receiving apparatus 101 is not greater than the display restart threshold or the display stop threshold, the control unit 301 controls to display the charging icon 502 in step S630.

In step S602, if the control unit 301 controls to stop displaying the charging icon 502, the process transitions to step S603. In step S603, if the remaining battery level of the power receiving apparatus 101 is equal to or less than the display restart threshold, the process transitions from step S605 to step S630. In step S630, the control unit 301 controls to display the icon 502 during charging. In step S603, if the remaining battery level of the power receiving apparatus 101 is not equal to or less than the display restart threshold, the process transitions to step S620. In step S620 , the control unit 301 controls to stop displaying the charging icon 502 .

In step S602, if the control unit 301 controls to display the charging icon 502, the process transitions to step S604. In step S604, if the remaining battery level of the power receiving apparatus 101 is equal to or greater than the display stop threshold, the process transitions to step S620. In step S620 , the control unit 301 controls to stop displaying the charging icon 502 . In step S604, if the remaining battery level of the power receiving apparatus 101 is less than the display stop threshold, the process transitions from step S605 to step S630. In step S630, the control unit 301 controls to display the icon 502 during charging. The display resumption threshold is equal to or less than the display stop threshold.

According to the present embodiment, it is possible to appropriately control the display of the charging icon 502 according to the remaining battery level of the power receiving apparatus 101, and to prevent the user from being bothered.

(Second embodiment)
In the first embodiment, the example of using the CSP to control the display of the charging icon 502 has been described. In the second embodiment, an example is shown in which an EPT packet containing a request to postpone the resumption of charging is used to control the display of the charging icon 502 . The EPT packet including the request to postpone the resumption of charging is a different packet from the EPT packet (EPT (Charge Complete)) indicating full charging of the power receiving apparatus 101 . An EPT packet including a request to postpone the timing of resuming charging is an EPT packet in which power transmission is stopped and the power receiving apparatus 101 notifies the power transmitting apparatus 100 of a request to postpone the timing of resuming power transmission. Hereinafter, an EPT packet including a request to postpone the resumption of charging is referred to as EPT (No More Charge).

The processing of the electronic device 102 according to this embodiment will be described. Since this embodiment has the same processing as that of the first embodiment shown in FIG. 6, it will be described using FIG. 6, and the description of the same processing will be omitted.

In this embodiment, EPT (No More Charge) is used to control the display of the charging icon 502 . Specifically, in step S603, the control unit 301 of the electronic device 102 always transitions to step S605 without performing determination.

In step S604 , the control unit 301 of the electronic device 102 determines whether the power transmission device 100 has received EPT (No More Charge) from the power reception device 101 . If the power transmission device 100 receives EPT (No More Charge) (YES in S604), the process transitions to step S620. If the power transmission device 100 has not received an EPT (No More Charge) (NO in S604), the process transitions to step S605.

First, in step S600 , the power transmission device 100 receives remaining battery level information (CSP) from the power reception device 101 . In step S601 , the power transmitting apparatus 100 notifies the control unit 301 of the electronic device 102 of the received remaining battery level information. The control unit 301 of the electronic device 102 displays the remaining battery amount 501 on the display unit 307 based on the remaining battery amount information.

In step S604 , the control unit 301 of the electronic device 102 determines whether the power transmission device 100 has received EPT (No More Charge) from the power reception device 101 . If the power transmission device 100 receives EPT (No More Charge) (YES in S604), the process transitions to step S620. In step S620 , the control unit 301 of the electronic device 102 stops displaying the charging icon 502 on the display unit 307 .

In step S604, if the power transmission device 100 has not received an EPT (No More Charge) (NO in S604), the process transitions to step S605. In step S605, the power transmitting apparatus 100 has not received an EPT (Charge Complete) (NO in S605), so the process transitions to step S630. In step S630, control unit 301 of electronic device 102 starts displaying charging icon 502 on display unit 307, and the process returns to step S600.

In step S602, if the display unit 307 stops displaying the charging icon 502 (YES in S602), the process proceeds to step S603. In step S603, the control unit 301 of the electronic device 102 always transitions to step S605 without performing determination. In step S605, if the power transmitting apparatus 100 has not received an EPT (Charge Complete) (NO in S605), the process transitions to step S630. In step S630, control unit 301 of electronic device 102 resumes displaying charging icon 502 on display unit 307, and the process returns to step S600. If the power transmission apparatus 100 receives EPT (Charge Complete) in step S605 (YES in step S605), power transmission by the power transmission apparatus 100 is stopped. Terminate the process without

Next, the sequence when the display of the charging icon 502 is controlled by applying the processing of the flowchart of FIG. 6 of this embodiment will be described with reference to FIG. 4B. Description of the steps that have already been described will be omitted. Note that in step F422 of the present embodiment, the power receiving apparatus 101 transmits EPT (No More Charge) to the power transmitting apparatus 100 .

First, the processing of steps F400, F423 to F426, and F431 to F436 is the same as the processing described in the first embodiment.

In step F422 , the power receiving apparatus 101 transmits EPT (No More Charge) to the power transmitting apparatus 100 because the remaining battery level of the battery 206 is 100% and charging is no longer necessary. Here, the power receiving apparatus 101 transmits EPT (No More Charge) in order to prevent power transmission being stopped and power transmission being restarted from being repeated in a short period of time.

In step F438, the power transmission device 100 notifies the control unit 301 of the electronic device 102 that EPT (No More Charge) has been received and power transmission has been stopped. In step F439 , the control unit 301 of the electronic device 102 stops displaying the charging icon 502 . In step S602 of FIG. 6, the process transitions to step S604 due to the determination of NO. In step S604, the power transmission device 100 receives EPT (No More Charge) (YES in S604), so the process transitions to step S620. In step S620 , the control unit 301 of the electronic device 102 stops displaying the charging icon 502 on the display unit 307 . At this time, the display unit 307 displays a 100% remaining battery level 501 and does not display the charging icon 502, as shown in FIG. 5A.

When the power transmission device 100 receives EPT (No More Charge) in step F422, it provides a preset waiting time until the next step F400 of analog ping is transmitted. For example, the waiting time is 5 minutes. After the standby time has elapsed, in step F400, the power transmitting apparatus 100 transmits Analog Ping to the power receiving apparatus 101. FIG. In step F423, the power transmitting apparatus 100 and the power receiving apparatus 101 perform the processing of steps F401 to F416 in FIG. 4A, transition to the Power Transfer phase again, and start transmitting and receiving power.

In this embodiment, the remaining battery level of the battery 206 has decreased because the standby time (5 minutes) has passed since it reached 100%. Therefore, it takes time for the remaining battery capacity of the battery 206 to reach 100% again. In step F427 , the power receiving apparatus 101 transmits CSP including information on the remaining battery level of the battery 206 to the power transmitting apparatus 100 . In step F440, the power transmitting apparatus 100 notifies the control unit 301 of the electronic device 102 of the remaining battery level of the battery. In step F441, the power transmitting apparatus 100 notifies the control unit 301 of the electronic device 102 that power is being transmitted. In step F442 , the control unit 301 of the electronic device 102 displays the remaining battery level 501 of the battery 206 on the display unit 307 . In step F443 , the control unit 301 of the electronic device 102 resumes displaying the charging icon 502 on the display unit 307 .

As described above, when receiving EPT (No More Charge) in step F422, the power transmitting apparatus 100 sets a waiting time until the next step F400 for transmitting Analog Ping. This can prevent the power transmission device 100 from repeatedly stopping and resuming power transmission in a short period of time, and can prevent the charging icon 502 from being repeatedly displayed and hidden in a short period of time. Therefore, user's annoyance can be suppressed.

Although the standby time described above is set in advance, it may be determined by negotiation between the power transmitting apparatus 100 and the power receiving apparatus 101 in the negotiation phase. Also, the standby time is the time from the reception of EPT (No More Charge) to the transmission of the next Analog Ping, but it may be the standby time from the stop of power transmission to the restart of power transmission. For example, the waiting time may be the waiting time from the reception of EPT (No More Charge) to the transition to the Power Transfer phase.

In addition, in step S603 of FIG. 6 of the present embodiment, the control unit 301 does not make the determination in step S603 and proceeds to step S605, but the present invention is not limited to this. As in the first embodiment, the control unit 301 may set a display resumption threshold and determine whether or not the remaining battery level of the battery 206 is equal to or less than the display resumption threshold. That is, the control unit 301 restarts the display of the charging icon 502 if the remaining battery charge of the battery 206 is equal to or less than the display restart threshold, and if the remaining battery charge of the battery 206 is not equal to or less than the display restart threshold, the charging icon Do not restart the display of 502. The display restart threshold may be set in advance, or may be determined by negotiation between the power transmitting apparatus 100 and the power receiving apparatus 101 in the negotiation phase.

The power receiving device 101 periodically transmits CSP to the power transmitting device 100 in the Power Transfer phase. Alternatively, the power transmitting apparatus 100 may periodically or irregularly request the power receiving apparatus 101 for a CSP, and the power receiving apparatus 101 may notify the power transmitting apparatus 100 of the CSP corresponding to the request. As a requesting method, there is a method of transmitting a request packet from the power transmitting apparatus 100 to the power receiving apparatus 101 . This request packet is a packet indicating that the power transmitting apparatus 100 requests the power receiving apparatus 101 to operate. Thereafter, the power transmitting apparatus 100 transmits a packet (requested action identification packet) including identification information identifying the requested action to the power receiving apparatus 101 . Note that the power transmitting device 100 may perform these two operations in one packet. That is, the power transmitting apparatus 100 transmits to the power receiving apparatus 101 a packet that indicates that the power transmitting apparatus 100 requests an operation from the power receiving apparatus 101 and that includes identification information that identifies the requested operation. good. The power receiving device 101 that has received this request packet and the requested operation identification packet transmits the CSP to the power transmitting device 100 .

The power receiving apparatus 101 may notify the CSP to the power transmitting apparatus 100 in the Negotiation phase. Alternatively, the power transmitting apparatus 100 may request the power receiving apparatus 101 for a CSP, and the power receiving apparatus 101 may notify the power transmitting apparatus 100 of the CSP corresponding to the request.

As described above, EPT (No More Charge) is a power transmission stop request including a request to postpone the timing of resuming charging of the power receiving apparatus 101, and is an example of charging information of the power receiving apparatus. In step S604, when the communication unit 305 receives EPT (No More Charge), the process transitions to step S620. In step S620 , the control unit 301 controls to stop displaying the charging icon 502 .

The power transmission unit 303 stops power transmission to the power receiving apparatus 101 based on the reception of EPT (No More Charge) by the communication unit 305, and after the waiting time has elapsed, starts power transmission to the power receiving apparatus 101 by Analog Ping. . When the power transmission unit 303 starts power transmission, the control unit 301 controls to display the charging icon 502 in step S630 via steps S603 and S605.

As in the first embodiment, the control unit 301 may perform control to display the charging icon 502 in step S630 when the remaining battery level of the power receiving apparatus 101 is equal to or less than the display restart threshold. . Further, as in the first embodiment, when the remaining battery level of the power receiving apparatus 101 is less than or equal to the display restart threshold, the control unit 301 may perform control to stop displaying the charging icon 502 in step S620. good.

According to the present embodiment, it is possible to appropriately control the display of the charging icon 502 according to EPT (No More Charge), and it is possible to suppress user's annoyance.

(Other embodiments)
Examples applicable to the first and second embodiments will be described below. In the first and second embodiments, the power transmitting device 100 acquires the remaining battery level of the battery 206 by receiving the CSP from the power receiving device 101, but the present invention is not limited to this. The power transmitting device 100 may acquire the remaining battery level of the battery 206 from the power receiving device 101 through BLE (Bluetooth Low Energy) communication. In this case, the

communication units

305 and 204 of the power transmitting device 100 and the power receiving device 101 are capable of BLE communication.

Also, the processing of FIGS. 6 and 7 can be realized by, for example, the

control units

200, 300 and 301 reading and executing pre-stored programs to control each functional unit. However, the present invention is not limited to this, and at least part of these processes may be implemented by hardware. When implemented by hardware, for example, by using a predetermined compiler, a dedicated circuit is automatically generated on the FPGA from a program for implementing each processing step. Here, FPGA is an acronym for Field Programmable Gate Array. Also, in the same way as the FPGA, hardware that forms a Gate Array circuit and executes at least part of the above-described processing may be implemented.

It should be noted that the above-described embodiments merely show specific examples for carrying out the present disclosure, and the technical scope of the present disclosure should not be construed in a limited manner. That is, the present disclosure can be embodied in various forms without departing from its technical spirit or its main features.

The present invention is not limited to the above embodiments, and various changes and modifications are possible without departing from the spirit and scope of the present invention. Accordingly, the following claims are included to publicize the scope of the invention.

This application claims priority based on Japanese Patent Application No. 2021-076306 filed on April 28, 2021, and the entire contents thereof are incorporated herein.

Claims

An electronic device having a power transmission device and a control means,
The power transmission device
a power transmitting means for wirelessly transmitting power to a power receiving device;
receiving means for receiving a remaining battery level of the power receiving device from the power receiving device;
The electronic device according to claim 1, wherein the control means controls display indicating that the power receiving device is being charged based on the remaining battery level of the power receiving device.
The electronic device according to claim 1, wherein the control unit stops displaying that the power receiving device is being charged when the remaining battery level of the power receiving device is greater than a threshold.
The electronic device according to claim 1 or 2, wherein the control means displays that the power receiving device is being charged when the remaining battery level of the power receiving device is not greater than a threshold value.
When the control means stops displaying that the power receiving device is being charged,
When the remaining battery level of the power receiving device is smaller than the first threshold, controlling to display that the power receiving device is being charged, and when the remaining battery level of the power receiving device is not smaller than the first threshold 4. The electronic device according to claim 3, wherein control is performed so as to stop displaying that the power receiving device is being charged.
The control means controls to display that the power receiving device is being charged, and if the remaining battery level of the power receiving device is greater than a second threshold, the power receiving device is being charged. If the remaining battery level of the power receiving device is not greater than the second threshold value, control is performed to display that the power receiving device is being charged. The electronic device according to claim 4.
The electronic device according to claim 5, wherein the first threshold is less than or equal to the second threshold.
The electronic device according to any one of claims 1 to 6, wherein the receiving means receives the remaining battery level of the power receiving device using a WPC standard Charge Status Packet.
The electronic device according to any one of claims 1 to 7, wherein the receiving means periodically receives the remaining battery level of the power receiving device.
The power transmitting device further includes transmitting means for transmitting a request for the remaining battery level of the power receiving device to the power receiving device,
The electronic device according to any one of claims 1 to 7, wherein the receiving means receives from the power receiving device the remaining battery level of the power receiving device corresponding to the request.
The transmitting means transmits a request for the remaining battery level of the power receiving device to the power receiving device when the receiving means receives a power transmission stop request from the power receiving device a predetermined number of times within a predetermined time. The electronic device according to claim 9 .
The electronic device according to any one of claims 1 to 10, wherein the receiving means receives from the power receiving device the remaining battery level of the power receiving device superimposed on the electric power.
12. The electronic device according to claim 11, wherein the receiving means receives the remaining battery level of the power receiving device by ASK modulation or FSK modulation.
The electronic device according to any one of claims 1 to 10, wherein the receiving means receives the remaining battery level of the power receiving device according to the Bluetooth Low Energy standard.
An electronic device having a power transmission device and a control means,
The power transmission device
a power transmitting means for wirelessly transmitting power to a power receiving device;
receiving means for receiving, from the power receiving device, a power transmission stop request including a request to postpone charging resumption timing of the power receiving device;
The control means controls to stop displaying that the power receiving device is being charged, based on the receiving means receiving a power transmission stop request including a request to postpone charging resumption timing of the power receiving device. An electronic device characterized by:
The power transmission means stops power transmission to the power receiving device when the receiving means receives a power transmission stop request including a request to postpone charging resumption timing of the power receiving device, and after a waiting time elapses, 15. The electronic device according to claim 14, wherein power transmission is started by
16. The electronic device according to claim 15, wherein the control means controls to display that the power receiving device is being charged when the power transmission means starts power transmission.
The receiving means receives the remaining battery level of the power receiving device from the power receiving device,
The control means controls to display that the power receiving device is being charged when the remaining battery power of the power receiving device is equal to or less than the first threshold, and the remaining battery power of the power receiving device reaches the first threshold. 17. The electronic device according to claim 16, wherein control is performed so as to stop displaying that the power receiving device is being charged when the power receiving device is not equal to or lower than the threshold of .
18. The apparatus according to any one of claims 14 to 17, wherein said receiving means receives from said power receiving device a power transmission stop request including a request for postponing a charging restart time of said power receiving device superimposed on said electric power. Electronics as described.
19. The electronic device according to claim 18, wherein the receiving means receives a power transmission stop request including a request to postpone charging restart timing of the power receiving device by ASK modulation or FSK modulation.
18. The electronic device according to any one of claims 14 to 17, wherein said receiving means receives a power transmission stop request including a request for postponing the resumption of charging of said power receiving device according to the Bluetooth Low Energy standard. .
A control method for an electronic device having a power transmission device and control means,
a power transmission step in which the power transmission device wirelessly transmits power to the power reception device;
a receiving step in which the power transmitting device receives the remaining battery level of the power receiving device from the power receiving device;
and a control step in which the control means controls display indicating that the power receiving device is being charged based on the remaining battery capacity of the power receiving device.
A control method for an electronic device having a power transmission device and control means,
a power transmission step in which the power transmission device wirelessly transmits power to the power reception device;
a receiving step in which the power transmission device receives from the power reception device a power transmission stop request including a request to postpone charging resumption timing of the power reception device;
The control means controls to stop displaying that the power receiving device is being charged, based on the reception of a power transmission stop request including a request to postpone charging resumption timing of the power receiving device in the receiving step. A control method for an electronic device, comprising: