Patent ID: 9069417
Filing Date: 2015-06-30
Classification: G06F

Abstract:
1. A method for tracking a hover event on a digitizer sensor of a digitizer system that treats hover and touch events differently, the digitizer sensor formed from a plurality of conductive lines spread over a sensing surface, the method comprising: defining an amplification factor for hover tracking; setting an amplification factor of amplifiers connected to the plurality of conductive lines to the amplification factor defined for hover tracking, wherein the amplification factor defined for hover tracking is different from an amplification factor defined for touch tracking; sampling outputs that are amplified with the amplification factor defined for hover tracking; detecting an input signal to the digitizer sensor based on the outputs sampled; verifying that the input signal is associated with a hover event as opposed to a touch event, responsive to amplitude and a gradient pattern of the outputs across at least part of the sensing surface corresponding to a first pre-defined amplitude and gradient pattern for hover that is other than a second pre-defined amplitude and gradient pattern for touch, wherein gradients forming the gradient pattern are absolute values of the differences of amplitudes of output on pairs of neighboring conductive lines; and defining a hover tracking point for the input signal responsive to verifying that the input signal is associated with a hover event.