Patent ID: 8922496

Claim:
A multi-touch detection method for a touch panel, wherein the touch panel comprises a first conductive layer and an overlapping second conductive layer, the first conductive layer having a plurality of first electrodes disposed along a first-axis direction, and the second conductive layer having a plurality of second electrodes disposed along a second-axis direction, the multi-touch detection method comprising: sensing the second electrodes sequentially to obtain a first voltage function when a first voltage is provided to the first electrodes; sensing the second electrodes sequentially to obtain a second voltage function when the first voltage is provided to a first portion of the first electrodes simultaneously and is not provided to a second portion of the first electrodes; and calculating positions of a first contact point and a second contact point in the second-axis direction by the first and the second voltage functions; wherein the first portion of the first electrodes contains at least two first electrodes, wherein the second portion of the first electrodes contains at least two first electrodes; wherein when the second electrodes are sequentially sensed, a ground voltage is provided to the second electrodes before been sensed.