COORDINATE SENSING APPARATUS FOR SENSING INPUT COORDINATE OF COORDINATE INDICATING DEVICE

摘要

Disclosed is a coordinate sensing system including a coordinate indicating device, and a coordinate sensing device for sensing an input coordinate of the coordinate indicating device. The coordinate indicating device includes a resonance circuit for generating electromagnetic resonance signals. The coordinate sensing device includes a sensor pad having a positioning coil electrode for sensing the resonance signals inputted from the coordinate indicating device and a controller for analyzing the resonance signals sensed by the coil electrode and sensing the inputted coordinate of the coordinate indicating device. The sensor pad includes a circuit layer in which the positioning coil electrode is arranged and a shielding layer for enhancing the signal to noise ratio, wherein the circuit layer includes a communication coil electrode for near field communications.;COPYRIGHT KIPO 2014;[Reference numerals] (10) Shielding layer;(20) Circuit layer;(3) Main body