Position indicator
A position indicator includes a pen-shaped body; control circuitry housed in the pen-shaped body and configured to generate position detection signals and generate additional information about the position indicator; a first receiver; a second receiver different from the first receiver; a first transmitter provided near a distal end of the pen-shaped body and configured to transmit the position detection signals to a sensor of a position detection system; and a second transmitter, which is different from the first transmitter and configured to transmit wireless signals to the position detection system. The control circuitry, in response to a control signal from the position detection system received by the first receiver or the second receiver, controls transmission of the position detection signals and transmission of the additional information via a transmitter selected from the first transmitter and the second transmitter, to the position detection system.
1. A position indicator, comprising:
a pen-shaped body;
control circuitry housed in the pen-shaped body and configured to:
generate position detection signals, and
generate additional information about the position indicator;
a first receiver;
a second receiver different from the first receiver;
a first transmitter provided near a distal end of the pen-shaped body and configured to transmit the position detection signals or the additional information to a sensor of a position detection system; and
a second transmitter, which is different from the first transmitter and configured to transmit wireless signals to the position detection system;
wherein the control circuitry, in response to a control signal from the position detection system received by the first receiver or the second receiver, controls transmission of the position detection signals via the first transmitter and transmission of the additional information via a transmitter selected from the first transmitter and the second transmitter, to the position detection system.
2. The position indicator according to claim 1 , comprising:
a center electrode extending along an axis of the pen-shaped body to protrude from the distal end of the pen-shaped body; and
a peripheral electrode disposed adjacent to the center electrode;
wherein the second receiver, in operation, receives the control signal via the center electrode or the peripheral electrode.
3. The position indicator according to claim 2 , wherein:
the control circuitry, in response to the control signal received via the center electrode or the peripheral electrode, controls the transmission of the additional information via the second transmitter to the position detection system.
4. The position indicator according to claim 1 , comprising:
a center electrode extending along an axis of the pen-shaped body to protrude from the distal end of the pen-shaped body; and
a peripheral electrode disposed adjacent to the center electrode;
wherein the second receiver, in operation, receives the control signal from the position detection system, and
wherein the first transmitter, in operation, transmits the additional information via the center electrode or the peripheral electrode to the position detection system.
5. The position indicator according to claim 1 , wherein:
the first receiver, in operation, receives the control signal from the position detection system, and
the second transmitter, in operation, transmits the additional information to the position detection system.
6. The position indicator according to claim 1 , comprising:
a center electrode extending along an axis of the pen-shaped body to protrude from the distal end of the pen-shaped body; and
a pressure detection circuit configured to detect a pressure applied to the center electrode;
wherein the additional information indicates the pressure detected by the pressure detection circuit.
7. The position indicator according to claim 1 , comprising:
an identification (ID) memory device configured to store an ID of the position indicator, and
the additional information indicates the ID of the position indicator.
8. The position indicator according to claim 1 , comprising:
an operable switch, and
the additional information indicates an operational state of the switch.
9. The position indicator according to claim 1 , wherein:
the second receiver, in operation, receives the control signal transmitted via the sensor of the position detection system.
10. The position indicator according to claim 1 , wherein:
the first receiver, in operation, receives the control signal transmitted via a wireless transmitter of the position detection system.
11. The position indicator according to claim 1 , wherein:
the first transmitter, in operation, transmits the position detection signals to the sensor of the position detection system via a capacitive coupling between the first transmitter and the sensor.
12. The position indicator according to claim 1 , wherein:
the first transmitter, in operation, transmits the position detection signals to the sensor of the position detection system via an electromagnetic coupling between the first transmitter and the sensor.
13. The position indicator according to claim 1 , wherein:
the first receiver, in operation, receives the control signal transmitted via a wireless transmitter of the position detection system, and
the first receiver and the second transmitter form a short-distance wireless communication system.
14. The position indicator according to claim 13 , wherein:
the short-distance wireless communication system is a Bluetooth® system.
15. The position indicator according to claim 1 , wherein:
the control circuitry, in response to the control signal from the position detection system not received by the first receiver or the second receiver for a defined time period, deactivates transmission from at least one of the first transmitter and the second transmitter.
16. A position indicator, comprising:
a pen-shaped body;
control circuitry housed in the pen-shaped body and configured to:
generate position detection signals, and
generate additional information about the position indicator;
a first receiver;
a second receiver different from the first receiver;
a first transmitter provided near a distal end of the pen-shaped body and configured to transmit the position detection signals or the additional information to a sensor of a position detection system; and
a second transmitter, which is different from the first transmitter and configured to transmit wireless signals to the position detection system;
wherein the control circuitry, in response to a control signal based on a spread code transmitted from the sensor of the position detection system and received by the second receiver, controls transmission of the position detection signals via the first transmitter and transmission of the additional information via a transmitter selected from the first transmitter and the second transmitter, to the position detection system.
17. A position indicator, comprising:
a pen-shaped body;
control circuitry housed in the pen-shaped body and configured to:
generate position detection signals, and
generate additional information about the position indicator;
a first receiver;
a second receiver different from the first receiver and configured to receive a control signal from a position detection system via a sensor of the position detection system;
a first transmitter provided near a distal end of the pen-shaped body and configured to transmit the position detection signals or the additional information to the sensor of the position detection system, wherein the first transmitter includes a center electrode, which extends along an axis of the pen-shaped body to protrude from the distal end of the pen-shaped body, and a peripheral electrode, which is disposed adjacent to the center electrode; and
a second transmitter, which is different from the first transmitter and configured to transmit the additional information as wireless signals to the position detection system;
wherein the control circuitry, in response to the control signal from the position detection system received by the second receiver, controls transmission of the position detection signals via the center electrode of the first transmitter, and transmission of the additional information via a transmitter selected from the first transmitter and the second transmitter, to the position detection system.
18. A position indicator, comprising:
a pen-shaped body;
control circuitry housed in the pen-shaped body and configured to:
generate position detection signals, and
generate additional information about the position indicator;
a first receiver configured to receive a control signal from a position detection system;
a second receiver different from the first receiver and configured to receive the control signal from the position system via a sensor of the position detection system;
a first transmitter provided near a distal end of the pen-shaped body and configured to transmit the position detection signals or the additional information to a sensor of a position detection system, wherein the first transmitter includes a center electrode, which extends along an axis of the pen-shaped body to protrude from the distal end of the pen-shaped body, and a peripheral electrode, which is disposed adjacent to the center electrode; and
a second transmitter different from the first transmitter;
wherein the control circuitry, in response to the control signal from the position detection system received by the first receiver, controls transmission of the position detection signals via the center electrode of the first transmitter to the position detection system, and controls transmission of the additional information via a transmitter selected from the first transmitter and the second transmitter to the position detection system.