Stylus pen
An exemplary embodiment of the present invention provides a stylus pen including: a body; a conductive tip configured to be exposed from an inside of the body to an outside thereof; and a resonance circuit connected to the conductive tip to resonate an electrical signal transferred from the conductive tip. An inductor unit of the resonance circuit includes a ferrite core and a coil wound in multiple layers over at least a portion of the ferrite core. The ferrite core includes nickel, and the coil can be formed by a litz wire with adjacent winding layers that are wound to be inclined in a zigzag form.
1. A stylus pen comprising:
a body;
an inductor unit including a ferrite core disposed in the body and a coil wound in multiple layers over at least a portion of the ferrite core; and
a capacitor unit disposed in the body and electrically connected to the inductor unit, and
wherein a permittivity of the ferrite core is greater than 0 F/m and less than 1000 F/m.
2. The stylus pen of claim 1 , wherein the coil has a form where adjacent winding layers are alternately wound.
3. The stylus pen of claim 1 , wherein
the coil is zigzag wound so that adjacent winding layers are inclined.
4. The stylus pen of claim 1 , wherein
the ferrite core includes nickel.
5. The stylus pen of claim 1 , wherein
the coil is a wire covering two or more insulated wires.
6. The stylus pen of claim 5 , wherein
the coil is formed as a litz wire.
7. The stylus pen of claim 1 , further comprising
a bobbin configured to surround at least a portion of the ferrite core, and
the coil is wound on at least a portion of the bobbin.
8. The stylus pen of claim 1 , wherein
the inductor unit includes two or more inductor that are connected in series.
9. The stylus pen of claim 1 , wherein
the inductor unit includes a plurality of inductors and the capacitor unit includes a plurality of capacitors,
a first resonance circuit includes a first inductor of the plurality of inductors and a first capacitor of the plurality of capacitors,
a second resonance circuit includes a second inductor of the plurality of inductors and a second capacitor of the plurality of capacitors, and
the first resonance circuit and the second resonance circuit are connected in series.
10. The stylus pen of claim 1 , further comprising
a blocking member disposed on at least a portion of the inductor unit.
11. A stylus pen comprising:
a body;
a resonance circuit disposed in the body,
wherein the resonance circuit includes:
an inductor unit configured to include a ferrite core disposed in the body and a coil wound in multiple layers over at least a portion of the ferrite core; and
a capacitor unit disposed within the body,
wherein a permittivity of the ferrite core is greater than 0 F/m and less than 1000 F/m.
12. The stylus pen of claim 11 , wherein
the ferrite core includes nickel.
13. The stylus pen of claim 11 , wherein
the coil is a wire covering two or more insulated wires.
14. The stylus pen of claim 13 , wherein
the coil is formed as a litz wire.
15. The stylus pen of claim 11 , further comprising
a bobbin configured to surround at least a portion of the ferrite core, and
the coil is wound on at least a portion of the bobbin.
16. The stylus pen of claim 11 , wherein
the resonance circuit is formed to include two or more inductor and one capacitor unit connected in series.
17. The stylus pen of claim 11 , wherein
the resonance circuit includes two or more LC resonance circuits that are connected in series.
18. The stylus pen of claim 11 , wherein
The coil is zigzag wound so that adjacent winding layers are inclined.
19. The stylus pen of claim 11 , wherein
the resonance circuit is configured to resonate a signal transferred from an external electrode.
20. The stylus pen of claim 11 , further comprising
a blocking member disposed on at least a portion of the inductor unit.