Electronic Devices With Configurable Capacitive Proximity Sensors
First Claim
1. A wearable electronic device, comprising:
- a controller; and
a capacitive proximity sensor coupled to the controller, wherein the capacitive proximity sensor includes;
electrodes;
switching circuitry coupled to the electrodes; and
a capacitive sensing circuit coupled to the electrodes and the switching circuitry, wherein the controller is configured to adjust the switching circuitry to dynamically combine at least one set of the electrodes to form at least one corresponding unitary electrode of enhanced size.
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Accused Products
Abstract
An electronic device such as a pair of headphones may be provided with ear cups having speakers for playing audio to a user. Capacitive proximity sensor electrodes having acoustic openings may overlap the speakers. The capacitive proximity sensor electrodes may include electrodes that are arranged in a ring. Control circuitry in the electronic device may use the capacitive proximity sensor electrodes to measure ear patterns of a user when the headphones are being worn on the head of the user. The control circuitry may include switching circuitry that allows the electrodes to be dynamically combined to form electrodes of enlarged area to enhance detection range or to form separate electrodes to enhance spatial resolution.
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Citations
22 Claims
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1. A wearable electronic device, comprising:
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a controller; and a capacitive proximity sensor coupled to the controller, wherein the capacitive proximity sensor includes; electrodes; switching circuitry coupled to the electrodes; and a capacitive sensing circuit coupled to the electrodes and the switching circuitry, wherein the controller is configured to adjust the switching circuitry to dynamically combine at least one set of the electrodes to form at least one corresponding unitary electrode of enhanced size. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. Headphones, comprising:
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first and second ear cups; a structure that couples the first and second ear cups; control circuitry; and capacitive proximity sensor electrodes in the first and second ear cups, wherein the control circuitry is configured to dynamically combine at least a selected number of the capacitive proximity sensor electrodes to form at least one corresponding unitary electrode. - View Dependent Claims (15, 16, 17)
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18. Headphones, comprising:
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first and second speakers; control circuitry; and capacitive proximity sensor electrodes overlapping at least one of the first and second speakers, wherein the control circuitry is configured to operate in; a first mode in which at least some of the capacitive proximity sensor electrodes are combined by the control circuitry to enlarge sensor electrode area and enhance detection range; and a second mode in which fewer of the capacitive proximity sensor electrodes are combined than in the first mode to enhance detection spatial resolution. - View Dependent Claims (19, 20)
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21. Apparatus, comprising:
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a controller; and a proximity sensor coupled to the controller, wherein the proximity sensor includes; an array of proximity sensor elements; and switching circuitry coupled to the sensor elements, wherein the controller is configured to adjust the switching circuitry to dynamically combine at least one set of the sensor proximity sensor element to enhance proximity detection range, wherein the proximity sensor elements comprise elements selected from the group consisting of;
optical sensor elements and inductive sensor elements.
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22. Apparatus, comprising:
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a controller; fabric; and a capacitive proximity sensor coupled to the controller and overlapped by the fabric, wherein the capacitive proximity sensor includes; electrodes; switching circuitry coupled to the electrodes; and a capacitive sensing circuit coupled to the electrodes and the switching circuitry, wherein the controller is configured to adjust the switching circuitry to dynamically combine at least one set of the electrodes to form at least one corresponding unitary electrode of enhanced size.
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Specification