POWER TRANSMISSION APPARATUS, METHOD FOR CONTROLLING POWER TRANSMISSION APPARATUS, AND STORAGE MEDIUM STORING PROGRAM

• US 20160276841A1
• Filed: 03/18/2016
• Published: 09/22/2016
• Est. Priority Date: 03/18/2015
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Tachiwa, Wataru
• Granted Patent: US 10,063,112 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment

Abstract

In a case where a notification signal is received from a second power reception apparatus different from a first power reception apparatus while power transmission is performed to the first power reception apparatus, power transmission to the second power reception apparatus is performed according to a result of negotiation with the second power reception apparatus if a power reception value corresponding to information included in the notification signal received from the second power reception apparatus is a sufficient value. The second power reception apparatus is not targeted for the power transmission if the power reception value corresponding to the information included in the notification signal received from the second power reception apparatus is not a sufficient value.

Claims

1. A power transmission apparatus comprising:

a first power transmission unit configured to perform power transmission;

a second power transmission unit configured to perform power transmission of higher power than that of the power transmission by the first power transmission unit;

a reception unit configured to receive a notification signal for making a notification of existence of a power reception apparatus from the power reception apparatus; and

a control unit configured to, in a case where the reception unit receives a notification signal from a power reception apparatus having received the power transmission by the first power transmission unit, cause the second power transmission unit to perform the power transmission according to a result of negotiation with the power reception apparatus from which the notification signal is transmitted,

wherein, in a case where the reception unit receives a notification signal from a second power reception apparatus having received the power transmission by the second power transmission unit to a first power reception apparatus, the control unit causes the second power transmission unit to perform the power transmission to the second power reception apparatus according to a result of negotiation with the second power reception apparatus if a power reception value corresponding to power reception information included in the notification signal received from the second power reception apparatus is a sufficient value, and

wherein, in the case where the reception unit receives the notification signal from the second power reception apparatus having received the power transmission by the second power transmission unit to the first power reception apparatus, the control unit does not target the second power reception apparatus for the power transmission by the second power transmission unit if the power reception value corresponding to the power reception information included in the notification signal received from the second power reception apparatus is not a sufficient value.

2. The power transmission apparatus according to claim 1,

wherein, in a case where the power reception value corresponding to the power reception information included in the notification signal received from the second power reception apparatus is a value exceeding a predetermined value, the control unite causes the second power transmission unit to perform the power transmission to the second power reception apparatus according to the result of negotiation with the second power reception apparatus, and

in a case where the power reception value corresponding to the power reception information included in the notification signal received from the second power reception apparatus is a value not exceeding the predetermined value, the control unit does not target the second power reception apparatus for the power transmission by the second power transmission unit.

3. The power transmission apparatus according to claim 1, wherein the predetermined value is a value according to an amount of power transmitted to the first power reception apparatus by the second power transmission unit.

4. The power transmission apparatus according to claim 1,

wherein, in a case where the power reception value corresponding to the power reception information received from the second power reception apparatus indicates existence of the second power reception apparatus in a power transmission range of the first power transmission unit, the control unit causes the second power transmission unit to perform the power transmission to the second power reception apparatus according to the result of negotiation with the second power reception apparatus, and

in a case where the power reception value corresponding to the power reception information included in the notification signal received from the second power reception apparatus does not indicate the existence of the second power reception apparatus in the power transmission range of the first power transmission unit, the control unit does not target the second power reception apparatus for the power transmission by the second power transmission unit.

5. The power transmission apparatus according to claim 1, wherein the power reception information is information about a power reception voltage.

6. The power transmission apparatus according to claim 1, further comprising a detection unit configured to detect an object existing in a predetermined range based on a change in impedance when power transmission of lower power than that of the power transmission by the first power transmission unit is performed,

wherein the first power transmission unit performs the power transmission in a case where the detection unit detects an object existing in the predetermined range.

7. The power transmission apparatus according to claim 1, further comprising a display control unit configured to, in a case where the negotiation fails, cause a display unit to display information for prompting a user to remove an object existing in a power transmission range.

8. The power transmission apparatus according to claim 1, wherein the second power transmission unit performs the power transmission by a magnetic field resonance method, an electromagnetic induction method, an electric field resonance method, a microwave method, or a power transmission method using a laser.

9. The power transmission apparatus according to claim 1, wherein the notification signal is an advertising packet defined by Bluetooth (registered trademark) Low Energy.

10. The power transmission apparatus according to claim 1, wherein the second power transmission unit performs power transmission for supplying power requested by the power reception apparatus.

11. The power transmission apparatus according to claim 1, wherein the power transmission apparatus selectively performs the power transmission by the first power transmission unit and the power transmission by the second power transmission unit.

12. The power transmission apparatus according to claim 1, wherein the negotiation is performed based on power transmittable by the power transmission apparatus and power requested by the power reception apparatus.

13. The power transmission apparatus according to claim 1, wherein the first power transmission unit performs power transmission for supplying the power reception apparatus with power to be used in performing the negotiation.

14. The power transmission apparatus according to claim 1, wherein the first power transmission unit performs power transmission for supplying the power reception apparatus with power to be used to transmit the notification signal.

15. The power transmission apparatus according to claim 1, wherein the first power transmission unit performs power transmission that triggers the power reception apparatus to transmit the notification signal.

16. A method for controlling a power transmission apparatus including a first power transmission unit configured to perform power transmission and a second power transmission unit configured to perform power transmission of higher power than that of the power transmission by the first power transmission unit, the method comprising:

receiving a notification signal for making a notification of existence of a power reception apparatus from the power reception apparatus; and

causing, in a case where a notification signal from a power reception apparatus having received the power transmission by the first power transmission unit is received, the second power transmission unit to perform the power transmission to the power reception apparatus according to a result of negotiation with the power reception apparatus from which the notification signal is received,

wherein, in a case where a notification signal is received from a second power reception apparatus having received the power transmission by the second power transmission unit to a first power reception apparatus, the second power transmission unit is caused to perform the power transmission to the second power reception apparatus according to a result of negotiation with the second power reception apparatus if a power reception value corresponding to power reception information included in the notification signal received from the second power reception apparatus is a sufficient value, and

wherein, in the case where the notification signal is received from the second power reception apparatus having received the power transmission by the second power transmission unit to the first power reception apparatus, the second power reception apparatus is not targeted for the power transmission by the second power transmission unit if the power reception value corresponding to the power reception information included in the notification signal received from the second power reception apparatus is not a sufficient value.

17. A storage medium storing a program for causing a power transmission apparatus to perform a control method, the power transmission apparatus including a first power transmission unit configured to perform power transmission and a second power transmission unit configured to perform power transmission of higher power than that of the power transmission by the first power transmission unit, the control method comprising:

receiving a notification signal for making a notification of existence of a power reception apparatus from the power reception apparatus; and

causing, in a case where a notification signal from a power reception apparatus having received the power transmission by the first power transmission unit is received, the second power transmission unit to perform the power transmission to the power reception apparatus according to a result of negotiation with the power reception apparatus from which the notification signal is received,

wherein, in a case where a notification signal is received from a second power reception apparatus having received the power transmission by the second power transmission unit to a first power reception apparatus, the second power transmission unit is caused to perform the power transmission to the second power reception apparatus according to a result of negotiation with the second power reception apparatus if a power reception value corresponding to power reception information included in the notification signal received from the second power reception apparatus is a sufficient value, and

wherein, in the case where the notification signal is received from the second power reception apparatus having received the power transmission by the second power transmission unit to the first power reception apparatus, the second power reception apparatus is not targeted for the power transmission by the second power transmission unit if the power reception value corresponding to the power reception information included in the notification signal received from the second power reception apparatus is not a sufficient value.