Floating Plate Capacitive Sensor
First Claim
Patent Images
1. A headset comprising:
- a decoupled electrically conductive material disposed within proximity of a headset surface adapted to be brought in contact with a user ear, wherein a first capacitance is formed when the headset surface is brought in contact with the user ear;
a coupled electrically conductive material disposed in proximity to the decoupled electrically conductive material, the coupled electrically conductive material and decoupled electrically conductive material forming a capacitor having a second capacitance in series with the first capacitance; and
a processor coupled to the coupled electrically conductive material adapted to receive signals from the coupled electrically conductive material to determine a measured capacitance associated with the first capacitance and the second capacitance indicating a headset donned state or a headset doffed state.
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Abstract
Methods and apparatuses for capacitive sensing are disclosed. In one example, a capacitive sensor includes a floating sense electrode disposed within proximity of an outward facing surface adapted to be brought in proximity to or touch a user skin surface. An interior electrode is disposed in proximity to the floating sense electrode, where the interior electrode and floating sense electrode form a capacitor.
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Citations
24 Claims
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1. A headset comprising:
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a decoupled electrically conductive material disposed within proximity of a headset surface adapted to be brought in contact with a user ear, wherein a first capacitance is formed when the headset surface is brought in contact with the user ear; a coupled electrically conductive material disposed in proximity to the decoupled electrically conductive material, the coupled electrically conductive material and decoupled electrically conductive material forming a capacitor having a second capacitance in series with the first capacitance; and a processor coupled to the coupled electrically conductive material adapted to receive signals from the coupled electrically conductive material to determine a measured capacitance associated with the first capacitance and the second capacitance indicating a headset donned state or a headset doffed state. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A capacitive sensor comprising:
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a decoupled sense electrode disposed within proximity of an outward facing surface adapted to be brought in proximity to or touch a user skin surface, wherein a first capacitance is formed when the decoupled sense electrode is brought in proximity to the user skin surface; a coupled interior electrode disposed in proximity to the decoupled sense electrode, the coupled interior electrode and decoupled sense electrode forming a capacitor having a second capacitance; and a sense circuit coupled to the coupled interior electrode, the sense circuit adapted to determine whether the decoupled sense electrode is in proximity to or touching the user skin surface. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A capacitive sensor comprising:
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a decoupled electrically conductive material disposed within proximity of a surface adapted to be brought in proximity to or touch a user skin surface; a coupled electrically conductive material, the coupled electrically conductive material and decoupled electrically conductive material forming a capacitor having an internal capacitance; and a sense circuit coupled to the coupled electrically conductive material, the sense circuit adapted to determine whether the decoupled electrically conductive material is in proximity to or touching the user skin surface responsive to a measured capacitance determined by the internal capacitance and a sense capacitance between the user skin surface and the decoupled electrically conductive material. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A capacitive sensor comprising:
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a floating sense electrode disposed within proximity of an outward facing surface adapted to be brought in proximity to or touch a user skin surface; and an interior electrode disposed in proximity to the floating sense electrode, wherein the interior electrode and the floating sense electrode form a capacitor having a capacitance, and the interior electrode is adapted to be directly coupled to a sense circuit configured to determine whether the floating sense electrode is in proximity to or touching the user skin surface. - View Dependent Claims (22, 23, 24)
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Specification