Patent ID: 9152287
Filing Date: 2015-10-06
Classification: G06F

Abstract:
1. A detection method for a four-wire touch screen device, comprising: in a first phase of operation, while a predetermined potential is driven across a first resistive sheet material of the device, reading voltages from: a first pair of electrodes on the first resistive sheet material, and a second pair of electrodes on a second resistive sheet material of the device; in a second phase of operation, while another predetermined potential is driven across the second resistive sheet material, reading voltages from: the first pair of electrodes, and the second pair of electrodes; determining a first difference voltage between the voltages measured at the first pair of electrodes during the first phase and a second difference voltage between the voltages measured at the second pair of electrodes during the second phase; and classifying a gesture type of a dual-touch user interaction with the resistive sheet materials based on a comparison of the first and second difference voltages to a rule set over multiple first and second phases of operation, the comparison to the rule set identifying a change over time of at least one of: the first difference voltage, or the second difference voltage.