Patent ID: 9256339
Filing Date: 2016-02-09
CPC Classification: G06F,H01Q

Claim Text:
1. A tablet having a flexible and transparent sensing region, comprising: a antenna substrate of an insulating material including a first loop antenna of a conductive material pattern formed to enclose an external circumference of an electronic pen sensing region for detecting a position of the electronic pen; and a plurality of first line antennas of a conductive material pattern which are arranged in parallel with each other within an internal portion of the first loop antenna and ends of which are electrically connected to the first loop antenna; and a control substrate including a first multiplexer(MUX) which has the other ends of the plurality of first line antennas, as inputs, and is configured to select any one of the inputs according to a first selection signal, as an output; an amplifier which is configured to output a potential difference between an output of the first multiplexer and an output of the first loop antenna; and a MCU(micro controller unit) which is configured to generate the first selection signal in any manner to select at least one of the plurality of first line antennas and then detect a position of the electronic pen outputting a resonant voltage of a predetermined frequency, from any one of the first line antennas on the basis of the potential difference outputted from the amplifier when the electronic pen approaches closely the electronic pen sensing region.