Compensated Linear Interpolation of Capacitive Sensors of Capacitive Touch Screens

摘要

An apparatus includes a capacitive touch screen (CTS); a touch screen interpolator (TSI) coupled to the CTS; a touch screen capacitive memory (TSCM) coupled to the touch screen interpolator, wherein the interpolator is configured to: interpolates a value based on data points correlated to at least three nodes: a magnitude change of capacitance of a node having the largest magnitude change; a position of the largest magnitude of change node; a change of magnitude of capacitance of a first closest neighbor node; and a change of magnitude of capacitance of a second closest neighbor node.