POSITION INDICATOR
First Claim
1. A position indicator configured to establish electromagnetic coupling with a conductor of a sensor of a position detection apparatus and to reflect information relating to an act of a user, the position indicator comprising:
- a first resonance circuit including an inductor and a capacitor;
a second resonance circuit including the inductor, the capacitor, and a variation device configured to vary a resonance frequency or a phase of the second resonance circuit in response to the act of the user;
a switch circuit configured to perform changeover between the first resonance circuit and the second resonance circuit; and
a changeover circuit configured to generate a changeover signal that drives the switch circuit and supply the changeover signal to the switch circuit;
wherein, when no signal is received from outside of the position indicator and when a signal other than a predetermined signal is received from outside of the position indicator, the changeover circuit does not generate the changeover signal and the second resonance circuit is configured to establish electromagnetic coupling with the conductor of the sensor of the position detection apparatus, andwherein, when the predetermined signal is received from outside of the position indicator, the changeover circuit generates the changeover signal and supplies the changeover signal to the switch circuit, the switch circuit performs changeover, and the first resonance circuit is configured to establish electromagnetic coupling with the conductor of the sensor of the position detection apparatus.
1 Assignment
0 Petitions
Accused Products
Abstract
A position indicator includes a first resonance circuit including an inductor and a capacitor, a second resonance circuit including the first resonance circuit and a variation device configured to vary a resonance frequency or a phase of the second resonance circuit in response to an act of a user, and a switch circuit configured to perform changeover between the first resonance circuit and the second resonance circuit. The switch circuit is changed over such that, when no signal is received from outside of the position indicator and when a signal other than a predetermined signal is received from outside of the position indicator, the second resonance circuit is selected, and when the predetermined signal is received from outside of the position indicator, the first resonance circuit is selected, and the selected resonance circuit is configured to electromagnetically couple with a conductor of a sensor of the position detection apparatus.
27 Citations
20 Claims
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1. A position indicator configured to establish electromagnetic coupling with a conductor of a sensor of a position detection apparatus and to reflect information relating to an act of a user, the position indicator comprising:
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a first resonance circuit including an inductor and a capacitor; a second resonance circuit including the inductor, the capacitor, and a variation device configured to vary a resonance frequency or a phase of the second resonance circuit in response to the act of the user; a switch circuit configured to perform changeover between the first resonance circuit and the second resonance circuit; and a changeover circuit configured to generate a changeover signal that drives the switch circuit and supply the changeover signal to the switch circuit; wherein, when no signal is received from outside of the position indicator and when a signal other than a predetermined signal is received from outside of the position indicator, the changeover circuit does not generate the changeover signal and the second resonance circuit is configured to establish electromagnetic coupling with the conductor of the sensor of the position detection apparatus, and wherein, when the predetermined signal is received from outside of the position indicator, the changeover circuit generates the changeover signal and supplies the changeover signal to the switch circuit, the switch circuit performs changeover, and the first resonance circuit is configured to establish electromagnetic coupling with the conductor of the sensor of the position detection apparatus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method comprising:
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providing a position indicator that includes a first resonance circuit and a second resonance circuit, the first resonance circuit including an inductor connected in parallel with a capacitor, the second resonance circuit including the inductor, the capacitor, a switch circuit, and a variation device connected in series with the circuit switch, the variation device connected in series with the circuit switch being connected in parallel with the inductor and the capacitor; receiving a predetermined signal from outside of the position indicator; in response to receiving the predetermined signal from outside of the position indicator, controlling the switch circuit to be in a non-conductive state; receiving a signal other than the predetermined signal from outside of the position indicator; and in response to receiving the signal other than the predetermined signal from outside of the position indicator, controlling the switch circuit to be in a conductive state. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification