Capacitance Scanning Proximity Detection
First Claim
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1. A method, comprising:
- scanning, by a processing device, a first set of electrodes of a capacitive sense array using a first sensing mode to identify a presence of an object in proximity to the capacitive sense array, wherein scanning using the first sensing mode identifies objects not in physical contact with the capacitive sense array; and
scanning the first set of electrodes using a second sensing mode to determine a location of the object in relation to the capacitive sense array, wherein rescanning using the second sensing mode determines locations of objects in physical contact with the capacitive sense array.
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Abstract
A method and apparatus for scanning a first set of electrodes of a capacitive sense array using a first sensing mode to identify a presence of an object in proximity to the capacitive sense array, where scanning using the first sensing mode identifies objects not in physical contact with the capacitive sense array. The first set of electrodes is scanned using a second sensing mode to determine a location of the object in relation to the capacitive sense array, where rescanning using the second sensing mode determines locations of objects in physical contact with the capacitive sense array.
187 Citations
22 Claims
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1. A method, comprising:
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scanning, by a processing device, a first set of electrodes of a capacitive sense array using a first sensing mode to identify a presence of an object in proximity to the capacitive sense array, wherein scanning using the first sensing mode identifies objects not in physical contact with the capacitive sense array; and scanning the first set of electrodes using a second sensing mode to determine a location of the object in relation to the capacitive sense array, wherein rescanning using the second sensing mode determines locations of objects in physical contact with the capacitive sense array. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus, comprising:
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a capacitive sense array having a plurality of electrodes; and a processing device coupled to the capacitive sensing array, the processing device configured to; scan a first set of electrodes of a capacitive sense array using a first sensing mode to identify a presence of an object in proximity to the capacitive sense array, wherein scanning using the first sensing mode identifies objects not in physical contact with the capacitive sense array; and scan the first set of electrodes using a second sensing mode to determine a location of the object in relation to the capacitive sense array, wherein rescanning using the second sensing mode determines locations of objects in physical contact with the capacitive sense array. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An apparatus comprising:
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a capacitive sense array having a plurality of electrodes; means for identifying a presence of an object in proximity to the capacitive sense array using a first sensing mode, wherein the first sensing mode identifies objects not in physical contact with the capacitive sense array; and means for determining a location of the object in relation to the capacitance sensing using a second sensing mode, wherein the second sensing mode determines locations of objects in physical contact with the capacitive sense array. - View Dependent Claims (21, 22)
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Specification