POWER DELIVERY DEVICE AND POWER DELIVERY/POWER RECEIVING SYSTEM.

摘要

A power delivery device comprises: a power delivery section that performs wireless power delivery; a communication section that performs wireless communication in a range that is wider than the range in which power delivery by the power delivery section is feasible; and a power delivery control circuit that controls the power of wireless transmission by the power delivery section. The power delivery control circuit controls (S508) the power of wireless power delivery by the power delivery section in accordance with: the number of power receiving devices whose communication section has received (S502) from a power receiving device a response to the effect that, when the power delivery section delivered power (S501) with a first power, power of at least a threshold value was received; and the number of power receiving devices whose communication section has received (S505) a response to the effect that, although the power delivery section was not delivering power (S504) or the power delivery section was delivering power with a second power smaller than the aforementioned first power, power was received from some other power receiving device that had received power of at least this threshold value.