Apparatus for detecting electro-magnetic stylus signals by inducing current into a plurality of sensor coils using signals transmitted by the tranmitter coil of the stylus
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United States of America Patent
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Jun 16, 1998
Grant Date -
N/A
app pub date -
Dec 13, 1995
filing date -
Dec 13, 1995
priority date (Note) -
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Abstract
A method and apparatus for detecting the presence of a stylus relative to an active area of a display screen. The method includes the steps of providing a number of sensors which are positioned to define a boundary surrounding an active area of the display screen, and transmitting an electromagnetic signal from the stylus to the sensors wherein the signal is indicative of the presence of the stylus relative to the active area.
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