Patent ID: 9430107
Filing Date: 2016-08-30
CPC Classification: G06F

Claim Text:
1. A method for decoding multiple touches and forces thereof on a touch sensing surface, said method comprising the steps of: scanning a plurality of channels aligned on an axis for determining self-capacitance values of each of the plurality of channels; comparing the self-capacitance values to determine which one of the channels has a local maximum self-capacitance value, wherein left and right slope values are determined for the at least one self-value, wherein: wherein when there is another self-value, then return to the step of determining left and right slope values; scanning a plurality of nodes of at least one channel having local maximum self-capacitance value for determining mutual values of the nodes; comparing the mutual values to determine which one of the nodes has the largest mutual capacitance value, wherein the node having the largest mutual capacitance value on the local maximum self-capacitance value channel is a potential touch location; and determining a force at the potential touch location from a change in the mutual capacitance values of the node at the potential touch location during no touch and during a touch thereto.