COMMUNICATION DEVICE, COMMUNICATION METHOD, AND COMMUNICATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a communication device that keeps down an impact of a light signal on a human body and enhances safety.SOLUTION: A communication device 10 comprises: a light-emitting unit 12 for transmitting a light signal; a transmission unit 30 for supplying a first signal S30 to the light-emitting unit 12; a light-receiving unit 13 for receiving the light signal; a reception unit 40 for receiving a second signal from the light-receiving unit 13; a connection detection unit 50 for performing first connection detection operation to detect connection with a communication opposite party by using an electric signal; and a control unit 14 including a timer 15 for controlling connection detection operation.SELECTED DRAWING: Figure 1