Power supply device, electronic device, control method, and recording medium

Abstract

A power supply device includes a power supply unit that wirelessly supplies power, a communication unit that communicates with an electronic device, and a control unit that controls the communication unit to transmit a predetermined data to the electronic device based on whether or not the electronic device is connected to an external device supplying power to the electronic device.

What is claimed is: 
     
         1 . A wireless power system including a power supply device and a power receiving device, the power supply system comprising:
 a power receiving unit that receives power wirelessly from the power supply device;   a connection unit that connects between the power receiving device and an external device, the external device being different from the power supply device;   a control unit that controls the power receiving device to receive power from the external device in a case where the power receiving device is in a state that enables the power receiving device to receive power from the external device through a connection between the power receiving device and the external device, the external device being different from the power supply device, and to receive power from the power supply device in a case where the power receiving device is not in the state that enables the power receiving device to receive power from the external device.   
     
     
         2 . The wireless power system according to  claim 1 , wherein the control unit that transmits via the communication unit first data to the power receiving device if the power receiving device and the external device are connected. 
     
     
         3 . The wireless power system according to  claim 2 , wherein the control unit continues to communicate with the power receiving device after the first data is transmitted to the power receiving device. 
     
     
         4 . The wireless power system according to  claim 1 , wherein the control unit controls the communication unit to transmit second data to the power receiving device if the power receiving device and the external device are not connected. 
     
     
         5 . The wireless power system according to  claim 1 , wherein the control unit controls the power supply unit to limit power for supplying to the power receiving device if the power receiving device and the external device are connected. 
     
     
         6 . The wireless power system according to  claim 1 , wherein the control unit controls the communication unit to transmit predetermined data to the power receiving device based on a first level and a second level if the power receiving device and the external device are connected, and
 wherein the first level indicates a level of power supplied from the power supply device to the power receiving device, and the second level indicates a level of power supplied from the external device to the power receiving device.   
     
     
         7 . The wireless power system according to  claim 6 , wherein the control unit controls the communication unit to transmit second data to the power receiving device if the first level is higher than the second level. 
     
     
         8 . The wireless power system according to  claim 6 , wherein the control unit controls the communication unit to transmit first data to the power receiving device if the first level is not higher than the second level. 
     
     
         9 . The wireless power system according to  claim 1 , wherein the control unit controls the power supply unit to supply predetermined power to the power receiving device if the power receiving device and the external device are not connected, and the predetermined power is used for charging a battery. 
     
     
         10 . The wireless power system according to  claim 1 , further comprising
 a detection unit that detects one or more power receiving devices, wherein, if the detection unit detects a plurality of power receiving devices, the control unit controls the communication unit to transmit command to the plurality of power receiving devices, and wherein the command is used for controlling not to receive power from the power supply device.   
     
     
         11 . The wireless power system according to  claim 1 , further comprising
 a detection unit that detects one or more power receiving devices, and wherein the control unit performs a process for controlling the communication unit to transmit predetermined data if a number of power receiving devices detected by the detection unit is changed.   
     
     
         12 . The wireless power system according to  claim 1 , wherein the external device is different from a battery. 
     
     
         13 . The wireless power system according to  claim 1 , wherein the external device includes an AC adapter. 
     
     
         14 . The wireless power system according to  claim 1 , wherein the external device includes a device that can supply power to the power receiving device based on Universal Serial Bus (USB). 
     
     
         15 . The wireless power system according to  claim 1 ,
 wherein the control unit that compares a level of power received from the power supply device to a level of power supplied by the external apparatus,   wherein in response to the power receiving device being in a state that enables the power receiving device to receive power from the external device and the level of power received from the power supply device being less than the level of power supplied by the external apparatus, the control unit selects the external apparatus to supply power to the power receiving device, and   wherein in response to either the power receiving device not being in a state that enables the power receiving device to receive power from the external device or the level of power received from the power supply device being greater than the level of power supplied by the external apparatus, the control unit selects the external apparatus to supply power to the power receiving device.   
     
     
         16 . A method for controlling a wireless power system including a power supply device and a power receiving device, the method comprising:
 wirelessly supplying power;   communicating with the power receiving device different from the power supply device; and   transmitting predetermined data to the power receiving device based on whether or not the power receiving device is in a state that enables the power receiving device to receive power from an external device through a connection between the power receiving device and the external device, the external device being different from the power supply device,   wherein the predetermined data includes one of first data and second data, the first data is used for causing the power receiving device to receive power from the external device, and the second data is used for causing the power receiving device to receive power from the power supply device, and   wherein the external device includes a device for supplying power to the power receiving device.   
     
     
         17 . A recording medium recording a program for causing a computer to execute a method for controlling a wireless power system including a power supply device and a power receiving device, the method comprising:
 wirelessly supplying power;   communicating with a power receiving device different from the power supply device; and   transmitting predetermined data to the power receiving device based on whether or not the power receiving device is in a state that enables the power receiving device to receive power from an external device through a connection between the power receiving device and the external device, the external device being different from the power supply device,   wherein the predetermined data includes one of first data and second data, the first data is used for causing the power receiving device to receive power from the external device, and the second data is used for causing the power receiving device to receive power from the power supply device, and   wherein the external device includes a device for supplying power to the power receiving device.