Stylus pen

Patent metadata

Field	Value
Publication number	US-10942587-B2
Application number	US-202016790853-A
Country	US
Kind code	B2
Filing date	Feb 14, 2020
Priority date	Feb 14, 2019
Publication date	Mar 9, 2021
Grant date	Mar 9, 2021

Abstract

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.

First claim

What is claimed is:

1. A stylus pen comprising:
a body;
a conductive tip configured to be exposed from an inside of the body to an outside thereof;
an inductor unit including a ferrite core disposed in the body and a coil connected to the conductive tip and wound in multiple layers over at least a portion of the ferrite core;
a capacitor unit disposed in the body to be electrically connected to the inductor unit to form a resonance circuit; and
a conductive blocking member disposed on at least a portion of the inductor unit,
wherein a permittivity of the ferrite core is greater than 0 F/m and less than 1000 F/m, and
wherein the coil has a form where adjacent winding layers are alternately wound, and the coil is a wire covering two or more insulated wires,
wherein the blocking member includes one slit for blocking the generation of eddy currents,
opposite ends of the blocking member are spaced apart in a first direction by the slit, and
the first direction is a direction in which an eddy current is generated.

2. The stylus pen of claim 1 , further comprising
a ground portion configured to be capable of being electrically connected to a user.

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 formed as a litz wire.

6. 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.

7. The stylus pen of claim 1 , wherein
the inductor unit is formed by two or more inductor units that are connected in series.

8. A stylus pen comprising:
a body;
a conductive tip configured to be exposed from an inside of the body to an outside thereof;
a resonance circuit disposed in the body to be connected to the conductive tip and to resonate an electrical signal transferred from the conductive tip;
a ground portion configured to be capable of being electrically connected to a user; and
a conductive blocking member configured to surround at least a portion of the resonance circuit,
wherein the resonance circuit includes:
a ferrite core disposed in the body; an inductor unit configured to include a coil electrically connected to the conductive tip and wound in multiple layers over at least a portion of the ferrite core; and
a capacitor unit disposed within the body to be electrically connected to the ground portion and the conductive tip,
wherein a permittivity of the ferrite core is greater than 0 F/m and less than 1000 F/m, the coil is zigzag wound so that adjacent winding layers are inclined, and coil is a wire covering two or more insulated wires; and
wherein
the blocking member includes one slit for blocking the generation of eddy currents,
opposite ends of the blocking member are spaced apart in a first direction by the slit, and
the first direction is a direction in which an eddy current is generated.

9. The stylus pen of claim 8 , wherein
the ferrite core includes nickel.

10. The stylus pen of claim 8 , wherein
the coil is formed as a litz wire.

11. The stylus pen of claim 8 , 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.

12. The stylus pen of claim 8 , wherein
the resonance circuit is formed to include two or more inductor units and one capacitor unit connected in series.

13. The stylus pen of claim 8 , wherein
the resonance circuit includes two or more LC resonance circuits that are connected in series.

Assignees

• Hideep Inc

Inventors

• Kim Seyeob
• Woo Hyoungwook
• Jung Kiryoung
• Kim Bonkee

Classifications

• H01F27/42

  Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils (circuits for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output H02P13/00; impedance networks H03H) · CPC title

• H01F27/2823

  Wires (H01F27/2866 takes precedence) · CPC title

• H01F27/28

  Coils; Windings; Conductive connections · CPC title

• H01F27/24

  Magnetic cores · CPC title

• H01F17/045 Primary

  with core of cylindric geometry and coil wound along its longitudinal axis, i.e. rod or drum core · CPC title