| 摘要 |
<p>A tablet of the present invention comprises: a loop antenna having a closed loop shape forming a circumference of an electronic pen sensing region; a plurality of line antennas arranged in parallel with each other into the teeth of a comb shape; a line selection circuit to which the other ends of the plurality of line antennas are coupled; and a coordinate sensing circuit for controlling the selecting operation of the line selection circuit and determining the position of the electronic pen based on the selected line antenna using the induced voltage presented in a differential output by the magnetic force emitted from the electronic pen. Here, the plurality of line antennas arranged in parallel with each other are divided into at least two groups, wherein a first group has one end connected to the loop antenna and the other end coupled to the line selection circuit, and a second group has one end coupled to the line selection circuit and the other end connected to the loop antenna.</p> |
