Patent ID: 8144132

Claim:
A multipoint sensing method used in a capacitive touch panel comprising a first electrode layer and a second electrode layer being electrically insulated and stacked with said first electrode layer, and adapted to sense multiple touch points when a touch event occurs on one of the first electrode layer and the second electrode layer, the multipoint sensing method comprising the steps of: a). inputting AC signals to multiple first electrodes of the first electrode layer and multiple second electrodes of the second electrode layer before touch event so as to detect a first capacitance between each two adjacent first electrodes, a second capacitance between each two adjacent second electrodes and a vertical capacitance intersected between one of the first electrodes and one of the second electrodes; b). using the AC signal to detect variation of each of the first capacitances and each of the second capacitances, and recording to positions of the respective first electrodes and second electrodes which correspond to the first capacitances and the second capacitances that are changed; and c). using the AC signal to measure the vertical capacitance at each of the positions intersected by the respective first electrode and second electrode recorded in step b), and comparing the vertical capacitance thus obtained with the vertical capacitance measured in step a), and determining the intersected positions to be the touch points when the respective comparison result shows a difference.