Power supply device and method, and program

A power supply device comprising:

• a power supply unit which supplies an electric power from a commercial power supply to a device through a power supply line;
• a switching unit which turns on/off the electric power supplied from the power supply unit to the device through the power supply line;
• a reader/writer unit which reads a device ID from a storage unit of the device powered by means of load modulation using a high frequency signal through the power supply line, or writes information into the storage unit included in the device;
• an authentication part which performs authentication on the device ID having been read by the reader/writer unit;
• and
• a control unit which performs control to turn on the switching unit and supply the first electric power from the power supply unit to the device through the power supply line when the device ID is authenticated by the authentication part,
• wherein the storage unit is configured to receive power from the high frequency signal.

A power supply method comprising:

• a power supply step in which a power supply unit supplies an electric power from a commercial power supply to a device through a power supply line;
• a switching step in which a switching unit turns on/off the electric power supplied to the device through the power supply line;
• a read/write step in which a reader/writer unit reads a device ID is read from a storage unit of the device powered by means of load modulation using a high frequency signal through the power supply line or writes information into the storage unit of the device;
• an authentication step in which an authentication part performs authentication on the device ID having been read by the process performed in the read/write step;
• and
• a control step in which a control unit controls to turn on the process performed in the switching step and supply the electric power to the device through the power supply line by the process performed in the power supply step when the authentication is granted by the process performed in the authentication step,
• wherein the power supply device includes:
• the power supply unit which supplies the electric power from the commercial power supply to the device through the power supply line;
• the switching unit which turns on/off the electric power supplied from the power supply unit to the device through the power supply line;
• the reader/writer unit which reads the device ID from the storage unit of the device powered by means of load modulation using the high frequency signal through the power supply line or writes information into the storage unit of the device;
• the authentication part which performs authentication on the device ID having been read by the reader/writer unit;
• and
• the control unit which controls to turn on the switching unit and supply the electric power from the power supply unit to the device through the power supply line when the authentication is granted by the authentication part, and
• wherein the storage unit is configured to receive power from the high frequency signal.

A non-transitory computer readable storage medium storing a program which causes a computer controlling a power supply device to execute a process comprising:

• a power supply step in which a power supply unit supplies an electric power from a commercial power supply to a device through a power supply line;
• a switching step in which a switching unit turns on/off the electric power supplied to the device through the power supply line by the process performed in the power supply step;
• a read/write step in which a reader/writer unit reads a device ID from a storage unit of the device powered by means of load modulation using a high frequency signal through the power supply line or writes information into the storage unit of the device;
• an authentication step in which an authentication part performs authentication on the device ID having been read by the process performed in the read/write step;
• and
• a control step in which a control unit performs control to turn on the process performed in the switching step and supply the electric power to the device through the power supply line by the process performed in the power supply step when the authentication is granted by the process performed in the authentication step, wherein
• the power supply device includes:
• the power supply unit which supplies the electric power from the commercial power supply to the device through the power supply line;
• the switching unit which turns on/off the electric power supplied from the power supply unit to the device through the power supply line;
• the reader/writer unit which reads the device ID from the storage unit of the device powered by means of load modulation using the high frequency signal through the power supply line or writes the information into the storage unit of the device;
• the authentication part which performs authentication on the device ID having been read by the reader/writer unit;
• and
• the control unit which performs control to turn on the switching unit and supply the electric power from the power supply unit to the device through the power supply line when the authentication is granted by the authentication part, and
• wherein the storage unit is configured to receive power from the high frequency signal.