Input system, electronic pen, and method of controlling electronic pen

Abstract

Disclosed is an input system including an electronic pen and an electronic device. The electronic device includes a touch sensor that performs capacitive coupling communication with the electronic pen, a sensor controller that performs communication control relating to the capacitive coupling communication, and a power transmitter that, in a case where the electronic pen is in a specific state, outputs, to the electronic pen, a power supply signal through a different communication from the capacitive coupling communication in response to a command from the sensor controller. The electronic pen includes a receiver that receives an uplink signal from the electronic device, a transmitter that transmits a downlink signal to the electronic device, a power receiver that receives the power supply signal from the electronic device through the different communication, and a pen controller that performs communication control and acquires data indicated by the power supply signal.