CAPACITIVE SENSING DEVICE
First Claim
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1. A capacitive sensing device comprising:
- a substrate;
a sensor electrode disposed over said substrate;
a first trace electrically coupled to said sensor electrode; and
a second trace proximate said first trace, said second trace for distinguishing proximity of an object with said sensor electrode from proximity of said object with said first trace.
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Abstract
A capacitive sensing device including a substrate, a sensor electrode disposed over the substrate, a first trace electrically coupled to the sensor electrode, and a second trace proximate the first trace. The second trace is for distinguishing proximity of an object with the sensor electrode from proximity of the object with the first trace.
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Citations
24 Claims
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1. A capacitive sensing device comprising:
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a substrate; a sensor electrode disposed over said substrate; a first trace electrically coupled to said sensor electrode; and a second trace proximate said first trace, said second trace for distinguishing proximity of an object with said sensor electrode from proximity of said object with said first trace. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for capacitive sensing, said method comprising:
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receiving a first signal from a sensor conductor of a capacitive sensing device, said sensor conductor disposed over a substrate and comprising a sensor electrode and a routing trace electrically coupling said sensor electrode to a controller; receiving a second signal from a differential trace of said capacitive sensing device, said differential trace disposed over said substrate and proximate said routing trace, said differential trace electrically coupled to said controller; and determining whether an object is proximate said routing trace based at least in part on said first signal and said second signal. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A capacitive sensing device comprising:
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a substrate comprised of a non-opaque material; a controller; a sensor conductor disposed on said substrate, said sensor conductor comprising; a sensor electrode; and a routing trace disposed electrically coupling said sensor electrode to said controller; and a differential trace electrically disposed on said substrate and coupled to said controller, said differential trace proximate said routing trace, said differential trace for distinguishing proximity of an object with said sensor electrode from proximity of said object with said routing trace; wherein said controller is operable to distinguish proximity of said object with said routing trace from proximity of said object with said sensor electrode based at least in part on a routing signal received from said routing trace and a differential signal received from said differential trace. - View Dependent Claims (22, 23, 24)
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Specification