| 摘要 |
<p>The present invention provides a position detecting device capable of detecting a position specified by a pointing device with reliability in low voltage driving. In the position detecting device for transmitting signals from a transmitting coil included therein to a pointing device and receiving signals from the pointing device through sensor coils included therein through electromagnetic coupling to detect the specified position, a capacitor for series resonance is connected to the transmitting coil. A drive current to be supplied to the transmitting coil is controlled such that each of time kT during which the drive current in a supply-stopped state rises to a maximum amplitude, time mT during which the drive current has the maximum amplitude, and time nT during which the drive current with the maximum amplitude falls to the amplitude in the supply-stopped state is an integer multiple of the period of the drive current.</p> |
