Patent ID: 8345019
Filing Date: 2013-01-01
Classification: G06F

Abstract:
1. A resistive touchscreen system, comprising: a coversheet comprising a first conductive coating; a substrate comprising a second conductive coating, the substrate and the coversheet positioned proximate each other such that the first conductive coating faces the second conductive coating, the substrate and coversheet being electrically disconnected with respect to each other in the absence of a touch; and a controller configured to (a) identify a multiple touch state when the substrate and coversheet are electrically connected with respect to each other at least two touch locations, (b) detect, over time, a plurality of apparent touch coordinates, (c1) identify two possible X coordinates and two possible Y coordinates associated with at least one of the apparent touch coordinates, (c2) determine when the apparent touch coordinates vary along a line segment, and (d) identify coordinate locations of two touches based on the line segment when the apparent touch coordinates vary along the line segment, and based on the two possible X coordinates and the two possible Y coordinates.