| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a wireless pen in which shift of frequency is eliminated. <P>SOLUTION: Variable inductance includes: a first ferrite magnetic core; a second ferrite magnetic core, and a coil which is wound around the first ferrite magnetic core, and in the variable inductance, an inductance value is changed by changing an interval between the first ferrite magnetic core and the second ferrite magnetic core. In a flexible member including an adjustment part, required force may be differentiated for changing the interval between the first ferrite magnetic core and the second ferrite magnetic core. Though a circuit is connected to the variable inductance, forms a resonance circuit, and receives an electromagnetic wave signal transmitted by a handwriting device, when resonance stops, energy stored in the resonance circuit transmits electromagnetic waves to the handwriting device again by an oscillation frequency of the wireless pen itself. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
