Electronic pen, input system, and pen pressure adjustment method

An input system comprising:

• an electronic device including a plane-shaped sensor;
• and
• an electronic pen that indicates a position on the plane-shaped sensor through communication with the electronic device,
• wherein the electronic pen includes:
• a reception circuit configured to receive a signal transmitted from the electronic device,
• a pen pressure sensor configured to output a detection signal correlated with an amount of pen pressure exerted on a pen tip of the electronic pen, and
• a value conversion circuit configured to convert, according to a conversion rule, a detection value indicated by the detection signal output from the pen pressure sensor, into a conversion value indicating a magnitude of the amount of pen pressure, and
• the value conversion circuit adjusts, according to a strength of the signal received by the reception circuit, rising sensitivity at which the amount of pen pressure transitions from zero to non-zero on a conversion characteristic curve identified by the conversion rule, where the conversion characteristic curve is expressed on a coordinate system with the detection value as a first axis and the conversion value as a second axis.

A pen pressure adjustment method related to an electronic pen that indicates a position on a plane-shaped sensor through communication with an electronic device including the plane-shaped sensor, the pen pressure adjustment method comprising:

• by the electronic pen,
• receiving a signal transmitted from the electronic device;
• outputting a detection signal correlated with an amount of pen pressure exerted on a pen tip of the electronic pen;
• converting, according to a conversion rule, a detection value indicated by the output detection signal into a conversion value indicating a magnitude of the amount of pen pressure;
• and
• adjusting, according to a strength of the received signal, rising sensitivity at which the amount of pen pressure transitions from zero to non-zero on a conversion characteristic curve identified by the conversion rule, where the conversion characteristic curve is expressed on a coordinate system with the detection value as a first axis and the conversion value as a second axis.