Position detecting device and position detecting method

摘要: A position detecting device includes a sensor having electrodes that receive an alternating current (AC) signal from capacitive stylus pen transmits the AC signal. The detects indicated by on sensor. also includes: electrode selection circuit selects provided in for connection to positive terminal and negative terminal; differential amplifier amplifies outputs indicating difference between signals generated at height detector obtains of relative surface sensor; control unit causes pattern selected change according obtained detector.