Touch device for passive resonant stylus, driving method for the same and touch system

A driving method for a touch device for sensing a position of a stylus including a resonance circuit driving, comprising:

• outputting a driving signal to a plurality of electrodes;
• receiving a sensing signal from the electrodes, the sensing signal including currents induced in the electrodes in opposite directions by the resonance circuit;
• and
• determining the position of the stylus from the sensing signal,
• wherein the determining of the position of the stylus includes determining a gap between electrodes having a largest difference in magnitude of the induced currents as a position of the stylus.

A touch system comprising:

• a stylus configured to include a resonance circuit;
• and
• a touch sensor configured to receive a sensing signal from a plurality of electrodes to determine a position of the stylus,
• wherein directions of currents induced in two electrodes of the plurality of electrodes by the resonance circuit are opposite to each other,
• wherein the touch controller determines a gap between electrodes having a largest difference in magnitude of the induced currents as a position of the stylus.