Capacitive and Inductive Sensing
First Claim
1. A method comprising:
- in an inductive-sensing mode, by a controller, applying an alternating-current (AC) signal on a first electrode of a capacitive touch sensor, the capacitive touch sensor configured to operate in the inductive-sensing mode and a capacitive-sensing mode;
sensing a signal indicative of a magnetic field on the first electrode, the signal due at least in part to a magnetic field generated by an object, the magnetic field being generated at least in part in response to the AC signal applied on the first electrode; and
determining a position of the object generating a magnetic field based on the signal indicative of the magnetic field.
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Accused Products
Abstract
In one embodiment, a method includes in an inductive-sensing mode, by a controller, applying an alternating-current (AC) signal on a first electrode of a capacitive touch sensor. The capacitive touch sensor is configured to operate in the inductive-sensing mode and a capacitive-sensing mode. The method also includes sensing a signal indicative of a magnetic field on the first electrode. The signal is due at least in part to a magnetic field generated by the object and the magnetic field is generated at least in part in response to the AC signal applied on the first electrode. The method also includes determining a position of the object generating the magnetic field based on the signal indicative of the magnetic field.
47 Citations
20 Claims
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1. A method comprising:
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in an inductive-sensing mode, by a controller, applying an alternating-current (AC) signal on a first electrode of a capacitive touch sensor, the capacitive touch sensor configured to operate in the inductive-sensing mode and a capacitive-sensing mode; sensing a signal indicative of a magnetic field on the first electrode, the signal due at least in part to a magnetic field generated by an object, the magnetic field being generated at least in part in response to the AC signal applied on the first electrode; and determining a position of the object generating a magnetic field based on the signal indicative of the magnetic field. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A computer-readable non-transitory storage medium embodying logic configured when executed to:
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in an inductive-sensing mode, apply an alternating-current (AC) signal on a first electrode of a capacitive touch sensor, the capacitive touch sensor configured to operate in the inductive-sensing mode and a capacitive-sensing mode; sense a signal indicative of a magnetic field on the first electrode, the signal due at least in part to a magnetic field generated by an object, the magnetic field being generated at least in part in response to the AC signal applied on the first electrode; and determine a position of the object generating the magnetic field based on the signal indicative of the magnetic field. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A device comprising:
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a capacitive touch sensor comprising a first electrode and a second electrode, the capacitive touch sensor configured to operate in the inductive-sensing mode and a capacitive-sensing mode; and a computer-readable non-transitory storage medium coupled to the capacitive touch sensor and embodying logic configured when executed to; in the inductive-sensing mode, apply an alternating-current (AC) signal on the first electrode; sense a signal indicative of a magnetic field on the first electrode, the signal due at least in part to a magnetic field generated an object, the magnetic field being generated at least in part in response to the AC signal applied on the first electrode; and determine a presence of the object generating the magnetic field based on the signal indicative of the magnetic field. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification