Patent ID: 7116962

Claim:
A power transmitting/receiving communication apparatus in which power supply and intercommunications are performed between a power transmitting side device and at least one power receiving side device, which are interconnected via two power transmission wires, wherein the power transmitting side device includes: a power transmitting side power source section operable to output power having a first power level; a power transmitting side data processing section operable to generate transmission data giving an instruction to the power receiving side device, and to receive and process reply data from the power receiving side device; a power transmitting side period control section operable to perform time-sharing control for a period of supplying the power, a data transmission period of transmitting the transmission data, and a reply data reception period of receiving the reply data; and a power transmitting side synthesis section operable to supply the power having the first power level, which is output from the power transmitting side power source section, to the power transmission wire during the power supply period, to convert the transmission data into transmission data having a second power level for transmission to the power transmission wire during the data transmission period, and further operable to transmit, to the power transmission wire, a data reception signal having a power level different from the first power level during the reply data reception period, and the power receiving side device includes: a power receiving side power source section operable to store the power having the first power level, which is supplied via the power transmission wire; a power receiving side data processing section operable to receive and process the transmission data having the second power level from the power transmitting side device, and to generate the reply data making a reply to the power transmitting side device; a power receiving side transmitting section operable to convert the reply data output from the power receiving side data processing section into reply data having a third power level for replying to the power transmission wire, during the reply data reception period; and a power level detection section operable to detect a power level of the power transmission wire, and to output power level detection results to the power receiving side data processing section, and the power receiving side data processing section is operable to select and receive data from the power transmission wire based on the power level detection results from the power level detection section, and to output the reply data to the power receiving side transmitting section by detecting reception of the data reception signal.