| http://www.w3.org/ns/prov#value | - To overcome the above drawback, one solution may be proposed that a stylus pen formed as the pickup 6 employs in its inside, detection means such as a switch for detecting falling of the stylus pen, and no output derived from the pickup coil 6 is supplied to the amplifier circuit 7 and the control circuit 10 when the stylus pen tumbles.
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