Patent ID: 8633917

Claim:
A method for capacitive position detection, comprising: obtaining a 2-D sensing information comprising a plurality of 1-D sensing information, wherein each of said plurality of 1-D sensing information comprises a plurality of continuous differences; determining a zero-crossing in each of said plurality of 1-D sensing information by said plurality of continuous differences in each of said plurality of 1-D sensing information; converting said plurality of continuous differences in each of said plurality of 1-D sensing information into a plurality of continuous signal values or dual differences; identifying the signal value or dual difference corresponding to said zero-crossing in each of said plurality of 1-D sensing information as a center signal value or dual difference; and determining a centroid position in each of said plurality of 1-D sensing information by applying a number i of said plurality of continuous signal values or dual differences before the center signal value or dual difference in each of said plurality of 1-D sensing information, and a number j of said plurality of continuous signal values or dual differences after the center signal value or dual difference in each of said plurality of 1-D sensing information.