Power transmitting apparatus, power receiving apparatus, power transmission method, program, and power transmission system

A power receiving apparatus comprising:

• a power receiving side communication unit for communicating with a power transmitting apparatus for transmitting power;
• a power reception unit for receiving power transmitted from the power transmitting apparatus in a non-contact manner;
• a received power level detection unit for outputting a detection result corresponding to the received power level based on a first transmission power transmitted from the power transmitting apparatus;
• and
• a control unit for transmitting received power information when the received power level meets a predetermined level from the power receiving side communication unit based on the detection result of the received power level detection unit.

A power transmission method comprising the steps of:

• transmitting a first transmission power from a power transmitting apparatus to a power receiving apparatus, the first transmission power being increased discretely by the power transmitting apparatus;
• receiving, at the power transmitting apparatus, received power information indicating that a received power level meets a predetermined level, the received power information being transmitted from the power receiving apparatus and based on a reception of the first transmission power at the power receiving apparatus;
• deriving, by the power transmitting apparatus, information related to power transmission based on the reception of the received power information, the information related to power transmission being for determining a second transmission power corresponding to a power desired by the power receiving apparatus;
• determining the second transmission power to be transmitted to the power receiving apparatus based on the information related to power transmission;
• and
• transmitting the determined second transmission power to the power receiving apparatus.

A non-transitory computer readable storage medium tangibly storing a program when executed by a computer processor causes a computer to perform the steps of:

• transmitting a first transmission power to a power receiving apparatus;
• increasing the first transmission power discretely;
• receiving received power information indicating that a received power level meets a predetermined level, the received power information being transmitted from the power receiving apparatus and based on a reception of the first transmission power at the power receiving apparatus;
• deriving information related to power transmission based on the reception of the received power information, the information related to power transmission being for determining a second transmission power corresponding to a power desired by the power receiving apparatus;
• determining the second transmission power to be transmitted to the power receiving apparatus based on the information related to power transmission;
• and
• transmitting the determined second transmission power to the power receiving apparatus.

A power transmission system comprising:

• a power transmitting apparatus for transmitting power;
• and
• a power receiving apparatus for receiving power transmitted by the power transmitting apparatus, wherein
• the power transmitting apparatus includes,
• a power transmission side communication unit for communicating with the power receiving apparatus,
• a power transmission unit for transmitting power to the power receiving apparatus in a non-contact manner,
• a transmission power information deriving unit for
• increasing discretely a first transmission power to be transmitted from the power transmission unit to the power receiving apparatus, and
• deriving information related to power transmission for determining a second transmission power corresponding to power desired by the power receiving apparatus based on reception, at the power transmission side communication unit, of received power information transmitted from the power receiving apparatus, the received power information indicating that a received power level meets a predetermined level, and
• a transmission power determining unit for determining the second transmission power to be transmitted to the power receiving apparatus based on the information related to power transmission derived by the transmission power information deriving unit;
• and
• the power receiving apparatus includes,
• a power receiving side communication unit for communicating with the power transmitting apparatus,
• a power reception unit for receiving power transmitted from the power transmitting apparatus in a non-contact manner,
• a received power level detection unit for outputting a detection result corresponding to the received power level based on a first transmission power transmitted from the power transmitting apparatus, and
• a control unit for transmitting the received power information from the power receiving side communication unit based on the detection result of the received power level detection unit.