| CPC G06F 3/03545 (2013.01) [G06F 3/0383 (2013.01); G06F 3/04162 (2019.05); G06F 3/046 (2013.01); G06F 2203/04108 (2013.01)] | 16 Claims |
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1. A stylus pen comprising:
a core body configured to serve as a tip of the stylus pen;
a resonant circuit including a ferrite core, a coil wound on an outer surface of the ferrite core, a second capacitor electrically connected to the coil, and a magnetic body spaced apart from the ferrite core by pressure applied to the core body;
a switching member configured to switch an electrical connection between a first capacitor and the coil according to the pressure applied to the core body;
at least one first contact electrically connected to the first capacitor; and
at least one second contact electrically connected to the coil and the second capacitor,
wherein the switching member electrically connects the first capacitor and the coil when the core body is not in contact with a touch screen, and blocks the electrical connection between the first capacitor and the coil when the core body contacts the touch screen, and
wherein the switching member includes:
a movable part coupled to the core body and configured to move according to a movement of the core body; and
a fixation part installed to maintain a fixed position inside a housing of the stylus pen; and
a contact state of the movable part with the fixation part is changed by the pressure applied to the core body,
wherein the core body includes a first end portion coupled to the movable part and a second end portion serving as the tip of the stylus pen,
wherein the fixation part is located between the ferrite core and the movable part, and
wherein an electrical connection between the at least one first contact and the at least one second contact is switched according to the contact state of the movable part and the fixation part.
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