Position Indicator
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United States of America Patent
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N/A
Issued Date -
Sep 6, 2012
app pub date -
Aug 24, 2011
filing date -
Mar 3, 2011
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A position indicator is for use with a wireless platform operable to wirelessly transmit an excitation signal and to determine position of the position indicator relative to the wireless platform according to an oscillation signal received by the wireless platform. The position indicator includes: a working unit disposed in a casing unit, and operable to receive the excitation signal via a receiver coil, to generate the oscillation signal from the excitation signal, and to wirelessly transmit the oscillation signal via a transmitter coil; and a trigger unit disposed in the receiving space, and including a core part having first and second sections that correspond respectively in position to the transmitter and receiver coils, the first section of the core part having a varying permeability value, the second section of the core part having a substantially non-varying permeability value.
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