Position detector and display device having the same

A position detecting system comprising:

• a sensor substrate having a sensor coil for receiving an electromagnetic wave output from a position indicator;
• a magnetic path plate comprising a stack of an amorphous layer and a non-amorphous layer, and the plate being arranged at a side of the sensor substrate opposite to a side facing the position indicator;
• and
• a display unit placed between the sensor substrate and the magnetic path plate,
• wherein:
• the sensor substrate has transparency,
• the magnetic plate is placed such that its amorphous layer is placed between the display unit and the non-amorphous layer,
• the amorphous layer is configured, based on its relative magnetic permeability, to form a magnetic path for magnetic flux generated by the sensor coil of the sensor substrate, and to prevent attenuation of the magnetic flux generated by the sensor coil of the sensor substrate due to eddy current loss, and
• the non-amorphous layer is configured as aluminum having relative magnetic permeability that is lower than that of the amorphous layer, and having conductivity to shield the sensor substrate from electromagnetic noise.