Methods and apparatus to scan a targeted portion of an input device to detect a presence
First Claim
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1. A method comprising:
- detecting a presence of an input object proximate to a second electrode associated with a second axis of an input device and not detecting the presence of the input object proximate to a first electrode associated with a first axis of the input device, comprising;
performing a first scan of the input device, wherein the first scan includes receiving first sensor signals from a plurality of electrodes;
determining that a first signal profile that is based on the first sensor signals is outside of a range of a reference signal profile, wherein signal profiles determined to be within the range of the reference signal profile indicate presence of an input object;
performing a second scan of the input device responsive to the first signal profile being outside of the range of the reference signal profile, and the detecting the presence of the input object proximate to the second electrode, wherein the second scan includes receiving second sensor signals from another pluraltiy of electrodes; and
using the second sensor signals to detect the presence of the input object at least proximate to the first electrode.
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Abstract
A method and apparatus perform a first scan of an input device and determine that a first signal profile received through the first scan is outside a range of a reference signal profile. The method and apparatus perform a second scan of the input device responsive to the first signal profile being outside the range of the reference signal profile and use a second signal profile received through the second scan to detect a presence of an input object at least proximate to the input device.
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Citations
20 Claims
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1. A method comprising:
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detecting a presence of an input object proximate to a second electrode associated with a second axis of an input device and not detecting the presence of the input object proximate to a first electrode associated with a first axis of the input device, comprising; performing a first scan of the input device, wherein the first scan includes receiving first sensor signals from a plurality of electrodes; determining that a first signal profile that is based on the first sensor signals is outside of a range of a reference signal profile, wherein signal profiles determined to be within the range of the reference signal profile indicate presence of an input object; performing a second scan of the input device responsive to the first signal profile being outside of the range of the reference signal profile, and the detecting the presence of the input object proximate to the second electrode, wherein the second scan includes receiving second sensor signals from another pluraltiy of electrodes; and using the second sensor signals to detect the presence of the input object at least proximate to the first electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus comprising:
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a scanning module configured to perform a first scan of an input device, wherein the first scan includes receiving first sensor signals from a plurality of electrodes; and a presence module coupled to the scanning module, the presence module configured to detect whether an input object is proximate to a first electrode associated with a first axis of the input device and a second electrode associated with a second axis of the input device, the presence module configured to determine that a first signal profile that is based on the first sensor signals is not within a range of a reference signal profile stored in a memory, wherein the scanning module is configured to perform a second scan of the input device responsive to the determination that the first signal profile is not within the range of the reference signal profile and a detection that the input object is proximate to the second electrode associated with the second axis of the input device, wherein the second scan includes receiving second sensor signals from another plurality of electrodes, and the presence module is configured to use the second sensor signals to detect that the input object is at least proximate to the first electrode associated with the first axis of the input device. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A sensing system comprising:
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a processing device; and a touch input device coupled with the processing device, the processing device comprising; a scanning module configured to perform a first scan of the touch input device and a second scan of the touch input device, wherein the first scan includes receiving first sensor signals from a plurality of electrodes, and the second scan includes receiving second sensor signals from another plurality of electrodes; and a presence module coupled to the scanning module, the presence module configured to detect whether an input object is proximate to a first electrode associated with a first axis of the input device and a second electrode associated with a second axis of the input device, the presence module configured to determine that a first signal profile, which is based on the first sensor signals, is not within a range of a reference signal profile stored in a memory, wherein the scanning module is configured to perform the second scan of the touch input device responsive to the determination that the first signal profile is not within the range of the reference signal profile and a detection that the input object is proximate to the second electrode associated with the second axis of the touch input device, and the presence module is configured to detect that the input object is at least proximate to the first electrode associated with the first axis of the touch input device, based on the second sensor signals. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification