JP2017158432A - Power reception device, control method for power reception device, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a user to recognize information on a charging speed which is generated at the time of wireless power transmission.SOLUTION: A power reception device comprises: power reception means for receiving power to be wirelessly supplied from a power transmission device; charging means for charging a charging battery by using power received by the power reception means; reception means for receiving information from the power transmission device; and display control means for causing a display part to display information selected from among a plurality of pieces of information indicating charging speeds by the charging means including first information indicating the charging speed by the charging means and second information indicating the charging speed slower than the charging speed indicated by the first information on the basis of the information received by the reception means.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a power receiving apparatus, a method for controlling the power receiving apparatus, and a program.

  In recent years, devices using rechargeable batteries, such as mobile phones, have been widely used. A system for charging a rechargeable battery includes a primary device that sends power to the rechargeable battery and a secondary device that receives power.

  In such a charging system, there is a technique for displaying a charging state of a rechargeable battery on the primary side (Patent Document 1). Moreover, there exists a technique which displays the charge condition of a rechargeable battery with a secondary side apparatus (patent document 2).

  In addition, there is a technique for transmitting electric power to a plurality of devices using electromagnetic induction or magnetic resonance (Patent Documents 3 and 4). Further, there is a wireless power transmission technique using communication in order to reliably supply power within a rating to a secondary device that uses different voltages or currents (Patent Document 5).

JP-A-8-0119189 Japanese Unexamined Patent Publication No. 7-2441045 JP 2008-017592 A JP 2009-136132 A JP-A-6-133476

  In a wireless charging system that can charge a plurality of secondary devices wirelessly, the power transmission capability of the primary device has an upper limit defined by the wireless charging system.

  On the other hand, in the wireless charging system, there is no need to connect the primary side device and the secondary side device, and thus there is a feature that restrictions on the position of the secondary side device during charging are relatively loose. For this reason, there may be a case where a predetermined number or more of secondary-side devices that cannot be wirelessly charged with the power transmission capability of the primary-side device are arranged in an area where wireless charging is possible.

  In this case, a phenomenon may occur in which the charging time of each secondary device becomes long or a specific secondary device is not charged.

  In view of the above problems, an object of the present invention is to enable a user to recognize information related to a charging rate that occurs during wireless power transmission.

The power receiving device according to the present invention that achieves the above object is as follows.
Power receiving means for receiving power supplied from a power transmission device by radio;
Charging means for charging the rechargeable battery using the power received by the power receiving means;
Receiving means for receiving information from the power transmission device;
Received by the receiving means among a plurality of information indicating the charging speed by the charging means, including first information indicating the charging speed by the charging means and second information indicating a charging speed slower than the charging speed indicated by the first information. Display control means for displaying information selected based on the information on the display unit;
It is characterized by having.

  According to the present invention, it becomes possible for a user to recognize information related to a charging rate that occurs during wireless power transmission.

1 is a configuration diagram of a wireless power transmission system according to a first embodiment. The lineblock diagram of the primary side device concerning a 1st embodiment. The block diagram of the secondary side apparatus which concerns on 1st Embodiment. The flowchart explaining the process regarding the charge of the primary side control part which concerns on 1st Embodiment. The figure which shows the 1st output content which concerns on 1st Embodiment. The figure which shows the 2nd output content which concerns on 1st Embodiment. The block diagram of the primary side apparatus which concerns on 2nd Embodiment. The block diagram of the secondary side apparatus which concerns on 2nd Embodiment. The flowchart explaining the process regarding the charge of the primary side control part which concerns on 2nd Embodiment. The figure which shows the output content which concerns on 2nd Embodiment. The block diagram of the primary side apparatus which concerns on 3rd Embodiment. The flowchart explaining the process regarding the charge of the primary side control part which concerns on 3rd Embodiment. The figure which shows the 1st output content which concerns on 3rd Embodiment. The figure which shows the 2nd output content which concerns on 3rd Embodiment. The figure which shows the 3rd output content which concerns on 3rd Embodiment.

(First embodiment)
The configuration of the wireless power transmission system according to the first embodiment will be described with reference to FIG.

  FIG. 1 shows a primary device 10 (wireless power transmission device 10), a secondary device 20 (wireless power reception device), and a secondary device 30 (second wireless power reception device). The primary device 10 supplies power to the secondary device 20 and the secondary device 30.

  With reference to FIG. 2, the structure of the primary side apparatus 10 is demonstrated. The primary device 10 includes a power plug 101, a power rectifier 102, a power transmitter 103, a primary coil 104, a primary communication unit 105, a primary antenna 106, and a primary controller 107. The power plug 101 is a plug for connecting to an AC power outlet. The power rectifier 102 rectifies the electricity sent from the power plug 101. The power transmission unit 103 sends the electricity rectified by the power supply rectification unit 102. The primary side coil 104 is a coil for the power transmission unit 103. The primary side communication unit 105 performs data communication. The primary side antenna 106 is an antenna for the primary side communication unit 105. The primary side control unit 107 controls the power transmission unit 103 and the primary side communication unit 105.

  Next, the configuration of the secondary device 20 will be described with reference to FIG. The secondary device 20 includes a secondary coil 201, a power receiving unit 202, a rechargeable battery 203, a charge processing unit 204, a secondary communication unit 205, a secondary antenna 206, a display unit 207, A secondary side control unit 208. The configuration of the secondary device 30 is the same as that of the secondary device 20.

  Secondary coil 201 receives electricity sent from primary coil 104. The power receiving unit 202 receives electricity from the secondary coil 201. The rechargeable battery 203 is a battery to be charged. It is. The charging processing unit 204 supplies the electricity received by the power receiving unit 202 to the rechargeable battery 203. The secondary side communication unit 205 performs data communication. The secondary side antenna 206 is an antenna for the secondary side communication unit 205. The display unit 207 displays information. Secondary side control unit 208 controls power reception unit 202, secondary side communication unit 205, and display unit 207.

  With reference to the flowchart of FIG. 4, operation | movement of the primary side control part 107 regarding the charge by this charging system is demonstrated.

  First, in step S401, the primary side control unit 107 determines whether or not a new secondary side device has been recognized. When it is determined that a new secondary device has been recognized (step S401; YES), the process proceeds to step S402 according to the recognition result. On the other hand, when it is determined that a new secondary device is not recognized (step S401; NO), the process returns to step S401 according to the recognition result.

  In step S402, the primary side control unit 107 determines whether there is another secondary side device that is already being charged. When it is determined that there is another secondary device that is already being charged (step S402; YES), the process proceeds to step S403. On the other hand, if it is determined that there is no other secondary device that is already being charged (step S402; NO), the process proceeds to step S404.

  In step S403, the primary side control unit 107 controls the primary side communication unit 105, and the primary side communication unit 105 transmits predetermined information to the secondary side device via the primary side antenna 106. In the secondary device, the secondary control unit 208 controls the secondary communication unit 205 and receives predetermined information transmitted from the primary device 10 via the secondary antenna 206. Then, the secondary side control unit 208 controls the display unit 207 and causes the display unit 207 to display power reception standby information indicating that standby is performed until power reception is started according to the determination result in step S402.

  In step S <b> 404, the primary side control unit 107 controls the primary side communication unit 105, and the primary side communication unit 105 transmits predetermined information to the secondary side device via the primary side antenna 106. Further, the primary side control unit 107 controls the power transmission unit 103, and the power transmission unit 103 transmits power to the secondary side device via the primary side coil 104. In the secondary side device, the secondary side control unit 208 controls the secondary side communication unit 205 and receives the predetermined information transmitted from the primary side device 10 via the secondary side antenna 206. When power is transmitted from the primary device 10 to the secondary device, the power receiving unit 202 receives power via the secondary coil 201. Then, the charging processing unit 204 stores the received electricity in the rechargeable battery 203. The secondary side control unit 208 controls the display unit 207, and the display unit 207 displays information indicating that charging is in progress.

  The processing is completed as described above, and as shown in FIG. 5, when only the secondary side device 20 is arranged on the charged area of the primary side device 10, the secondary side device 20 is being charged. Is displayed, and the secondary device 20 is charged. Also, from this state, when the secondary device 30 is arranged in the charged area of the primary device 10, information indicating that the secondary device 30 is waiting for charging is displayed on the secondary device 30 as shown in FIG. Is done.

  According to this embodiment, since the user of the secondary side apparatus 30 can know the reason for not being charged, the convenience improves.

(Second Embodiment)
The configuration of the charging system according to the second embodiment is the same as the configuration shown in FIG. 1 described in the first embodiment.

  With reference to FIG. 7, the structure of the primary side apparatus 10 which concerns on 2nd Embodiment is demonstrated. The primary device 10 includes a power plug 701, a power rectifier 702, a power transmission communicator 703, a primary coil / antenna 704, and a primary controller 705. The power plug 701 is a plug for connecting to an AC power outlet. The power rectifier 702 rectifies the electricity sent from the power plug 701. The power transmission communication unit 703 sends the electricity rectified by the power supply rectification unit 702 to the secondary device and performs data communication. The primary coil / antenna 704 is a coil / antenna for the power transmission communication unit 703. The primary side control unit 705 controls the power transmission communication unit 703.

  Next, the configuration of the secondary device 20 will be described with reference to FIG. The secondary device 20 includes a secondary coil / antenna 801, a power reception communication unit 802, a rechargeable battery 803, a charge processing unit 804, a display unit 805, and a secondary side control unit 806. The configuration of the secondary device 30 is the same as that of the secondary device 20.

  The secondary coil / antenna 801 is a coil / antenna that receives electricity and predetermined information transmitted from the primary coil / antenna 704. The power receiving communication unit 802 receives electricity transmitted from the secondary coil / antenna 801 and performs data communication. The rechargeable battery 803 is a battery to be charged. The charging processing unit 804 supplies the electricity received by the power receiving communication unit 802 to the rechargeable battery 803. The display unit 805 displays information. The secondary side control unit 806 controls the power receiving communication unit 802 and the display unit 805. With reference to the flowchart of FIG. 9, operation | movement of the primary side control part 705 regarding the charge by this charge system is demonstrated.

  First, in step S901, the primary side control unit 705 determines whether or not a new secondary side device has been recognized. When it is determined that a new secondary device has been recognized (step 901; YES), the process proceeds to step S902. On the other hand, when it is determined that a new secondary device is not recognized (step S901; NO), the process returns to step S901.

  In step S902, the primary side control unit 705 updates the number of secondary devices that are being charged.

  In the example shown in FIG.

  Next, in step S903, the primary side control unit 705 determines whether the number of charged units is 2 or more. When it is determined that the number of charged units is 2 or more (step S903; YES), the process proceeds to step S904. On the other hand, when it is determined that the number of charged units is not 2 or more (step S903; NO), the process proceeds to step S905.

  In step S904, the primary side control unit 705 controls the power transmission communication unit 703, and the power transmission communication unit 703 transmits predetermined information to the secondary side device via the primary side coil / antenna 704. In the secondary device, the secondary control unit 806 controls the power receiving communication unit 802 to receive the predetermined information transmitted from the primary device 10 via the secondary coil / antenna 801.

  Further, the primary side control unit 705 controls the power transmission communication unit 703, and the power transmission communication unit 703 transmits power to the secondary side device via the primary side coil / antenna 704. When power is transmitted from the primary device 10 to the secondary device, the power receiving communication unit 802 receives power via the secondary coil / antenna 801. Then, the charging processing unit 804 stores the received electricity in the rechargeable battery 803. Then, the secondary side control unit 806 controls the display unit 805 to display on the display unit 805 information indicating the number of charged units and information indicating that charging time is long because simultaneous charging is being performed.

  In step S905, the primary side control unit 705 controls the power transmission communication unit 703, and the power transmission communication unit 703 transmits predetermined information to the secondary side device via the primary side coil / antenna 704. Further, the primary side control unit 705 controls the power transmission communication unit 703, and the power transmission communication unit 703 transmits power to the secondary side device via the primary side coil / antenna 704. In the secondary device, the secondary control unit 806 controls the power receiving communication unit 802 to receive the predetermined information transmitted from the primary device 10 via the secondary coil / antenna 801. When power is transmitted from the primary device 10 to the secondary device, the power receiving communication unit 802 receives power via the secondary coil / antenna 801. Then, the secondary side control unit 806 controls the display unit 805, and the display unit 805 displays information indicating that charging is in progress.

  The process is completed as described above. As shown in FIG. 5, when only the secondary device 20 is arranged in the charged area of the primary device 10, the secondary device 20 is being charged. Information indicating that it is present is displayed, and the secondary device 20 is charged. Further, from this state, when the secondary device 30 is further arranged in the region to be charged, the secondary device 20 and the secondary device 30 are being charged at the same time as shown in FIG. Therefore, information indicating that the charging time is long is displayed. Note that a scheduled time required for completion of charging may be further displayed.

  According to the present embodiment, the users of the secondary side device 20 and the secondary side device 30 can know the information that the number of the secondary side devices that are charged at the same time and the charging time become long. Convenience is improved.

(Third embodiment)
The configuration of the charging system according to the third embodiment is the same as the configuration shown in FIG. 1 described in the first embodiment. Moreover, the structure of the secondary side apparatus which concerns on 3rd Embodiment is the same as the structure shown by FIG. 3 demonstrated in 1st Embodiment.

  First, with reference to FIG. 11, the structure of the primary side apparatus 10 which concerns on 3rd Embodiment is demonstrated. The primary device 10 includes a power plug 1101, a power rectifier 1102, a power transmission unit 1103, a primary coil 1104, a primary communication unit 1105, a primary antenna 1106, an output unit 1107, and a primary control unit. 1108.

  The power plug 1101 is a plug for connecting to an AC power outlet. The power rectifier 1102 rectifies the electricity sent from the power plug 1101. The power transmission unit 1103 sends the electricity rectified by the power supply rectification unit 1102. The primary coil 1104 is a coil for the power transmission unit 1103. The primary side communication unit 1105 performs data communication. The primary side antenna 1106 is an antenna for the primary side communication unit 1105. The output unit 1107 outputs information. The primary side control unit 1108 controls the power transmission unit 1103, the primary side communication unit 1105, and the output unit 1107.

  With reference to the flowchart of FIG. 12, the operation | movement of the primary side control part 1108 regarding the charge by this charging system is demonstrated. First, in step S1201, the primary side control unit 1108 determines whether or not a new secondary side device has been recognized. When it is determined that a new secondary device has been recognized (step S1201; YES), the process proceeds to step S1202. On the other hand, when it is determined that a new secondary device is not recognized (step S1201; NO), the process returns to step S1201.

  In step S1202, the primary control unit 1108 determines whether another secondary device is already being charged. If it is determined that the other secondary device is already being charged (step S1202; YES), the process proceeds to step S1204. On the other hand, when it is determined that the other secondary device is not charged (step S1202; NO), the process proceeds to step S1203.

  In step S1203, the primary side control unit 1108 controls the primary side communication unit 1105, and the primary side communication unit 1105 transmits predetermined information to the secondary side device via the primary side antenna 1106. Further, the primary side control unit 1108 controls the power transmission unit 1103, and the power transmission unit 1103 transmits power to the secondary side device via the primary side coil 1104. In the secondary device, the secondary control unit 208 controls the secondary communication unit 205 and receives predetermined information transmitted from the primary device 10 via the secondary antenna 206. When power is transmitted from the primary device 10 to the secondary device, the power receiving unit 202 receives power via the secondary coil 201. Then, the charging processing unit 204 stores the received electricity in the rechargeable battery 203. The secondary side control unit 208 controls the display unit 207, and the display unit 207 displays information indicating that charging is in progress. When the process of step S1203 ends, the process proceeds to step S1206.

  In step S1204, the primary side control unit 1108 updates the number of units waiting for charging.

  In step S1205, the primary side control unit 1108 controls the primary side communication unit 1105, and the primary side communication unit 1105 transmits predetermined information to the secondary side device via the primary side antenna 1106. In the secondary device, the secondary control unit 208 controls the secondary communication unit 205 and receives predetermined information transmitted from the primary device 10 via the secondary antenna 206. The secondary side control unit 208 controls the display unit 207, and the display unit 207 displays information indicating the number of units waiting for charging.

  In step S1206, the primary side control unit 1108 controls the output unit 1107, and the output unit 1107 outputs information on each secondary side (second display process).

  The process ends here.

  Thus, as shown in FIG. 13, when only the secondary side device 20 is arranged in the charging area of the primary side device 10, information indicating that charging is being performed is displayed on the secondary side device 20. In addition, the secondary device 20 is charged. The primary device 10 also displays information indicating that one unit is being charged. Further, from this state, when the secondary side device 30 is further arranged in the charging area of the primary side device 10, as shown in FIG. 14, the secondary side device 30 includes information indicating that it is waiting for charging. , Information indicating that the number of waiting devices is one is displayed. Further, from this state, as shown in FIG. 15, when the secondary side device 40 having a different charging method is arranged in the charging area of the primary side device 10, nothing is displayed on the secondary side device 40, The display on the primary side device does not change.

  According to the present embodiment, since the user of the charging system can grasp the charging status, convenience is improved.

(Other embodiments)
The present invention can also be realized by executing the following processing. That is, software (program) that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various storage media, and a computer (or CPU, MPU, or the like) of the system or apparatus reads the program. It is a process to be executed.

  10: Primary side device (wireless power transmitting device), 20: Secondary side device (wireless power receiving device), 30: Secondary side device (second wireless power receiving device), 101: Power plug, 102: Power rectifier, 103 : Power transmission unit, 104: primary coil, 105: primary communication unit, 106: primary antenna, 107: primary control unit

Claims (12)

A power receiving device,
Power receiving means for receiving power supplied from a power transmission device by radio;
Charging means for charging the rechargeable battery using the power received by the power receiving means;
Receiving means for receiving information from the power transmission device;
Received by the receiving means among a plurality of information indicating the charging speed by the charging means, including first information indicating the charging speed by the charging means and second information indicating a charging speed slower than the charging speed indicated by the first information. Display control means for displaying information selected based on the information on the display unit;
A power receiving device comprising:   The display control unit selects the first information when the receiving unit receives information to be transmitted when the power transmitting device is not transmitting power to another power receiving device different from the power receiving device. The power receiving apparatus according to claim 1, wherein information is displayed on a display unit.   The display control unit selects the second information when the receiving unit receives information to be transmitted when the power transmitting device is transmitting power to another power receiving device different from the power receiving device, and selects the second information. Is displayed on the display unit. The power receiving device according to claim 1 or 2.   4. The power receiving device according to claim 1, wherein the first information is information indicating that normal charging is performed. 5.   5. The power receiving device according to claim 1, wherein the second information is information indicating that a charging time is longer than that of normal charging. 6.   The said 2nd information is information which shows that charging time becomes long because several apparatuses are charging, The one of Claim 1 thru | or 5 characterized by the above-mentioned. Power receiving device.   The power receiving device according to any one of claims 1 to 6, wherein the first information or the second information is a message.   The power receiving apparatus according to claim 1, wherein the receiving unit directly receives information from the power transmitting apparatus wirelessly.   The power receiving device according to claim 1, wherein the display control unit further displays a scheduled time required for completion of charging on the display unit.   The power receiving apparatus according to claim 1, wherein the receiving unit receives information via an antenna used by the power receiving unit for receiving power. A method for controlling a power receiving device having charging means for charging a rechargeable battery using power supplied wirelessly from a power transmitting device,
Among the plurality of pieces of information indicating the charging rate by the charging unit including the first information indicating the charging rate by the charging unit and the second information indicating the charging rate slower than the charging rate indicated by the first information, from the power transmission device Display the information selected based on the received information on the display unit;
A control method for a power receiving apparatus.   The program for operating a computer as a power receiving apparatus of any one of Claims 1 thru | or 10.

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