Position detecting device and computer including the same
First Claim
1. A position detecting device, comprising:
- a position pointer which transmits a position-pointing signal using a power supply stored in a rechargeable power storage unit, said position pointer including a coil, a charging circuit for charging said power storage unit, and a transmitter for transmitting said position-pointing signal; and
a tablet which detects a position pointed to by said position pointer when receiving said position-pointing signal, said tablet including an excitation coil wound around a periphery of a position detecting area, an excitation circuit for supplying an alternating voltage to said excitation coil, a position-pointing signal detector for detecting said position-pointing signal received from said position pointer, and an excitation controller for controlling a supply of the alternating voltage to said excitation coil based on said detected position-pointing signal.
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Accused Products
Abstract
A position detecting device is provided. The position detecting device includes a position pointer which transmits a position-pointing signal using a power supply stored in a rechargeable power storage unit, and a tablet which detects a position pointed to by the position pointer when receiving the position-pointing signal. The position pointer includes a coil, a charging circuit for charging the power storage unit, and a transmitter for transmitting the position-pointing signal. The tablet includes an excitation coil wound around a periphery of a position detecting area of the tablet, an excitation circuit for supplying an alternating voltage to the excitation coil, a position-pointing signal detector for detecting the position-pointing signal received from the position pointer, and an excitation controller for controlling a supply of the alternating voltage to the excitation coil based on the detected position-pointing signal.
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Citations
36 Claims
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1. A position detecting device, comprising:
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a position pointer which transmits a position-pointing signal using a power supply stored in a rechargeable power storage unit, said position pointer including a coil, a charging circuit for charging said power storage unit, and a transmitter for transmitting said position-pointing signal; and
a tablet which detects a position pointed to by said position pointer when receiving said position-pointing signal, said tablet including an excitation coil wound around a periphery of a position detecting area, an excitation circuit for supplying an alternating voltage to said excitation coil, a position-pointing signal detector for detecting said position-pointing signal received from said position pointer, and an excitation controller for controlling a supply of the alternating voltage to said excitation coil based on said detected position-pointing signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A position detecting apparatus for detecting a position of a position pointer, the apparatus comprising:
a tablet having a plurality of conductors disposed on a surface thereof, the plurality of conductors including a plurality of detecting conductors to detect a position of the position pointer and at least one charging conductor to charge the position pointer. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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16. A position detecting apparatus, comprising:
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a tablet having electromagnetic detecting conductors arranged along a surface thereof, the electromagnetic detecting conductors interacting with a pointing device, wherein the surface of the tablet includes a first region in which a position of the pointing device is detected and a second region in which the position of the pointing device is detected and a battery of the pointing device is recharged. - View Dependent Claims (17, 18)
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19. A position detecting apparatus, comprising:
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a position pointer having a rechargeable power supply; and
a tablet having a plurality of conductors disposed on a surface thereof, the plurality of conductors including;
a plurality of detecting conductors to detect a position of the position pointer based on a position signal of a first signal power received from the position pointer, and at least one charging conductor to charge the power supply of the position pointer by transmitting a charging signal of a second signal power to the position pointer, the second signal power being greater than the first signal power. - View Dependent Claims (20)
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21. A position detecting apparatus, comprising:
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a position pointer having a rechargeable power supply; and
a tablet having a plurality of conductors disposed on a surface thereof, the plurality of conductors including a plurality of detecting conductors to detect a position of the position pointer and at least one charging conductor to charge the power supply of the position pointer when the position pointer is within a vicinity of the at least one charging conductor. - View Dependent Claims (22, 23, 24)
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25. A pointing device usable with a position detecting apparatus having a tablet with a plurality of detecting conductors and at least one charging conductor, the device comprising:
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a housing;
a resonance circuit to transmit a position signal to the detecting conductors of the tablet and to receive a charging signal from the at least one charging conductor of the tablet; and
a rechargeable battery to receive an electric current from the resonance circuit when the charging signal is being received. - View Dependent Claims (26, 27, 33)
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28. A computer, comprising:
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a position detecting device, including a position pointer which transmits a position-pointing signal using a power supply stored in a rechargeable power storage unit, said position pointer including a coil, a charging circuit for charging said power storage unit, and a transmitter for transmitting said position-pointing signal; and
a tablet which detects a position pointed to by said position pointer when receiving said position-pointing signal, said tablet including an excitation coil wound around a periphery of a position detecting area, an excitation circuit for supplying an alternating voltage to said excitation coil, a position-pointing signal detector for detecting said position-pointing signal received from said position pointer, and an excitation controller for controlling a supply of the alternating voltage to said excitation coil based on said detected position-pointing signal. - View Dependent Claims (29, 30, 31, 32)
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34. A method of operating a position detecting apparatus including a position pointer having a rechargeable power supply and a tablet having a plurality of detecting conductors to detect a position of the position pointer and at least one charging conductor to charge the power supply of the position pointer, the method comprising:
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receiving a position signal from the position pointer at the detecting conductors;
determining a position of the position pointer with respect to the tablet based on the received position signal; and
transmitting a charging signal from the at least one charging conductor to the position pointer if it is determined that the position of the position pointer is within a predetermined distance from the at least one charging conductor. - View Dependent Claims (35, 36)
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Specification