Controller for position detection

A controller for position detection, performing at least the following operations:

• determining at least one first 1-D position corresponding to at least one external object based on signals of a plurality of first sensors by self-capacitance detection;
• and
• determining at least one second 1-D position corresponding to the at least one first 1-D position based on signals of a plurality of second sensors by mutual-capacitance detection, wherein each second 1-D position is determined based on a differential sensing information including a plurality of mutual capacitive values at the same time, wherein each of plurality of mutual capacitive values is a difference between signals of two second sensors by mutual-capacitance detection.