Hover and touch detection for digitizer
First Claim
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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.
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Abstract
A method and system for tracking a hover event on a digitizer sensor that treats hover and touch events differently comprises configuring at least one parameter of the digitizer sensor for hover tracking; wherein the at least one parameter is configured differently than for touch tracking, and detecting a pattern of input signals from a plurality of conductive lines on the digitizer sensor defining a tracking point responsive to the pattern of hover input signals detected.
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Citations
38 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A digitizer system for tracking a hover event on a digitizer sensor that treats hover and touch events differently comprising:
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a digitizer sensor including a plurality of conductive lines; a memory operative to store an amplification factor of the digitizer sensor for hover tracking that is different than an amplification factor of the digitizer sensor for touch tracking; and a controller operative to set an amplification factor of amplifiers connected to outputs from the plurality of conductive lines of the digitizer sensor to a dedicated pre-defined amplification factor defined for hover tracking that is other than a dedicated pre-defined amplification factor for touch tracking, to detect input signals based on the outputs sampled, to verify that the input signals are part of a hover event as opposed to a touch event responsive to an amplitude and 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, and to define a hover tracking point for the input signals responsive to verifying that the input signals are part of a hover event, wherein gradients forming the gradient pattern are absolute values of the differences of amplitudes of output on pairs of neighboring conductive lines. - View Dependent Claims (33, 34, 35, 36, 37, 38)
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Specification