Fingertip touch recognition for a digitizer
First Claim
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1. A method for verifying a fingertip touch input to a digitizer, the method comprising:
- obtaining a spatial pattern of signal amplitudes from input provided over a plurality of conductive lines of a digitizer sensor;
detecting gradients within the spatial pattern of signal amplitudes;
determining a number of conductive lines associated with a spatial gradient below a pre-defined gradient threshold; and
recognizing a fingertip touch input in response to the number of conductive lines determined being below a pre-defined number.
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Abstract
A method for verifying a fingertip touch input to a digitizer, the method comprises detecting a pattern of signals obtained from conductive lines of a digitizer sensor, comparing the pattern to a pre-determined fingertip characteristic, and recognizing a fingertip touch input based on the comparison.
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Citations
43 Claims
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1. A method for verifying a fingertip touch input to a digitizer, the method comprising:
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obtaining a spatial pattern of signal amplitudes from input provided over a plurality of conductive lines of a digitizer sensor; detecting gradients within the spatial pattern of signal amplitudes; determining a number of conductive lines associated with a spatial gradient below a pre-defined gradient threshold; and recognizing a fingertip touch input in response to the number of conductive lines determined being below a pre-defined number. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A system for verifying a fingertip input to a digitizer comprising:
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a digitizer sensor comprising an array of conductive lines; and a controller operative to obtain a spatial pattern of signal amplitudes from input provided over a plurality of the conductive lines; to determine a number of conductive lines associated with a gradient below a pre-defined gradient threshold; and to verify a fingertip touch in response to the number of conductive lines determined being below a defined number of conductive lines. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A method for verifying a fingertip touch input to a digitizer, the method comprising:
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obtaining a spatial pattern of signal amplitudes from input provided over a plurality of contiguous conductive lines of a digitizer sensor, wherein the plurality of contiguous conductive lines is more than two contiguous conductive lines; determining gradients across the spatial pattern of signal amplitudes obtained from the input provided over the plurality of contiguous conductive lines; comparing a spatial pattern of the gradients across the spatial pattern of signal amplitudes to a pre-determined fingertip characteristic; determining a number of gaps in the spatial pattern of the gradients; and recognizing a fingertip touch input based on the comparison to the pre-determined fingertip characteristic. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38)
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39. A system for verifying a fingertip input to a digitizer comprising:
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a digitizer sensor comprising an array of conductive lines; and a controller operative to obtain a spatial pattern of signal amplitudes from input provided over a plurality of contiguous conductive lines of the array;
to determine a spatial pattern of gradients across the spatial pattern of the signal amplitudes;
to determine a number of gaps in the spatial pattern of the gradients;
to compare the spatial pattern of gradients determined to a pre-determined fingertip characteristic; and
to verify a fingertip touch based on the comparison to the fingertip characteristic, wherein the plurality of contiguous conductive lines is more than two contiguous conductive lines. - View Dependent Claims (40, 41, 42, 43)
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Specification