Position indicator, position indicating device, and detection method of tilt of position indicator

A method comprising:

• providing a position indicator having a housing and a first electrode and a second electrode, wherein the first electrode and the second electrode are disposed on a side of one end of the housing, wherein the second electrode surrounds the first electrode and the first electrode is partially exposed from the second electrode in an axial direction of the housing, wherein the position indicator includes a coil having a first end and a second end, wherein the first end of the coil is coupled to the second electrode, wherein the position indicator includes a switch circuit that is coupled between the second end of the coil and a reference potential, wherein the second electrode, the coil, and the switch circuit are connected in series with the coil between the second electrode and the switch circuit, wherein, while the switch circuit is in an on-state, the second electrode is coupled to the reference potential through the coil and the switch circuit, and wherein, while the switch circuit is in an off-state, the second electrode is not coupled to the reference potential through the coil and the switch circuit;
• and
• forming a capacitive interaction between the first electrode and a sensor of a position detecting device by supplying a signal to the first electrode;
• and
• changing the capacitive interaction between the first electrode and the sensor of the position detecting device formed by the supplying of the signal to the first electrode by coupling the second electrode with the reference potential,
• wherein the changing includes providing a switching control signal to the switch circuit that causes the switch circuit to change between the on-state and the off-state.

A position detecting device that communicates with a position indicator having a housing, and a first electrode and a second electrode, wherein the first electrode and the second electrode are disposed on a side of one end of the housing, wherein the second electrode surrounds the first electrode and the first electrode is partially exposed from the second electrode in an axial direction of the housing, wherein the position indicator includes a coil having a first end and a second end, wherein the first end of the coil is coupled to the second electrode, wherein the position indicator includes a switch circuit that is coupled between the second end of the coil and a reference potential, wherein the second electrode, the coil, and the switch circuit are connected in series with the coil between the second electrode and the switch circuit, wherein, while the switch circuit is in an on-state, the second electrode is coupled to the reference potential through the coil and the switch circuit, and wherein, while the switch circuit is in an off-state, the second electrode is not coupled to the reference potential through the coil and the switch circuit, and wherein the signal transmission control circuit includes a controller which, in operation, provides a switching control signal to the switch circuit that causes the switch circuit to change between the on-state and the off-state, the position detecting device comprising:

• a sensor that has a capacitive interaction with the position indicator;
• and
• a control circuit which, in operation, obtains a coordinate position indicated by the position indicator by the capacitive interaction, detects identification information included in a signal transmitted from the position indicator, and determines a control state of the second electrode of the position indicator at the coordinate position based on the identification information.