Patent ID: 8487906

Claim:
A method for detecting a touched position on a touch device, the touch device having a first conductive layer and a plurality of sensing electrodes being separated from each other, and disposed on one side of the first conductive layer, the method for detecting the touched position comprising: providing a first voltage to the first conductive layer; receiving a touch signal in response to a touched position of the touch device to change the first voltage at an area of the first conductive layer, wherein the area corresponds to the touched position; measuring the sensing electrodes detecting the variation of the first voltage to obtain a plurality of voltage signals, wherein the voltage signals comprises an extreme value voltage signal, a first voltage signal, and a second voltage signal, the sensing electrodes comprises a first sensing electrode, a second sensing electrode, and a third sensing electrode, the first voltage signal is obtained from the first sensing electrode, the extreme value voltage signal is obtained from the second sensing electrode, the second voltage signal is obtained from the third sensing electrode, the second sensing electrode is located between the first sensing electrode and the third sensing electrode, and the second sensing electrode is disposed adjacent to the first sensing electrode and the third sensing electrode, respectively; obtaining a first sensing position according to the voltage signals and a position computing mode; and obtaining a second sensing position according to the first sensing position and a correction mode, wherein the second sensing position is equal to the touched position, and the correction mode has a first curve relation; wherein a space exists between every two adjacent sensing electrodes, a plurality of computation parameters of the position computing mode comprises a difference between the extreme value voltage signal and the first voltage signal, a difference between the extreme value voltage signal and the second voltage signal, and the space.