METHOD AND APPARATUS FOR OFF-BODY DETECTION FOR WEARABLE DEVICE
First Claim
1. A method of operating a wearable device, the wearable device comprising one or more biometric sensors including a capacitive sensor, the method comprising:
- measuring, based on output of the capacitive sensor, a capacitance value indicative of proximity of the wearable device to a user;
detecting a change in the capacitance value within a defined time interval, the change being greater than or equal to a threshold change indicative of the wearable device not being proximate to the user'"'"'s skin;
determining that the wearable device has been removed from the user in response to detecting that the change in the capacitance value within the defined time interval is greater than or equal to the threshold change; and
de-authenticating the user from the wearable device in response to determining that the wearable device has been removed from the user.
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Accused Products
Abstract
A method and apparatus for capacitive off-wrist detection for wearable device are disclosed. In one aspect, the wearable device includes one or more biometric sensors including a capacitive sensor. The method may involve measuring, based on output of the capacitive sensor, a capacitance value indicative of proximity of the wearable device to a user. The method may also involve detecting a change in the capacitance value within a defined time interval, the change being greater than or equal to a threshold change indicative of the wearable device not being proximate to the user'"'"'s skin. The method may further involve determining that the wearable device has been removed from the user in response to detecting that the change in the capacitance value within the defined time interval is greater than or equal to the threshold change.
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Citations
30 Claims
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1. A method of operating a wearable device, the wearable device comprising one or more biometric sensors including a capacitive sensor, the method comprising:
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measuring, based on output of the capacitive sensor, a capacitance value indicative of proximity of the wearable device to a user; detecting a change in the capacitance value within a defined time interval, the change being greater than or equal to a threshold change indicative of the wearable device not being proximate to the user'"'"'s skin; determining that the wearable device has been removed from the user in response to detecting that the change in the capacitance value within the defined time interval is greater than or equal to the threshold change; and de-authenticating the user from the wearable device in response to determining that the wearable device has been removed from the user. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method of operating a wearable device, the wearable device comprising one or more biometric sensors including an optical sensor and a capacitive sensor, the method comprising:
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detecting that an output signal of the optical sensor falls to or below an optical threshold indicative of the wearable device not being proximate to the user'"'"'s skin; measuring, based on output of the capacitive sensor, a capacitance value indicative of proximity of the wearable device to the user; detecting that a change in the capacitance value within a defined time interval is greater than or equal to a threshold change indicative of the wearable device not being proximate to the user'"'"'s skin; determining that the wearable device has been removed from the user in response to at least one of (i) detecting that the output signal of the optical sensor has fallen to or below the optical threshold and (ii) detecting that the change in the capacitance value within the defined time interval is greater than or equal to the threshold change; and de-authenticating the user from the wearable device in response to determining that the wearable device has been removed from the user. - View Dependent Claims (25, 26)
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27. A wearable device, comprising:
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a capacitive sensor configured to measure a capacitance value indicative of proximity of the wearable device to a user; at least one processor; and a memory storing computer-executable instructions for controlling the at least one processor to; detect that a change in the capacitance value within a defined time interval is greater than or equal to a threshold change indicative of the wearable device not being proximate to the user'"'"'s skin; determine that the wearable device has been removed from the user in response to detecting that the change in the capacitance value within the defined time interval is greater than or equal to the threshold change; and de-authenticate the user from the wearable device in response to determining that the wearable device has been removed from the user. - View Dependent Claims (28, 29)
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30. A wearable device, comprising:
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an optical sensor; a capacitive sensor configured to measure a capacitance value indicative of proximity of the wearable device to a user; at least one processor; and a memory storing computer-executable instructions for controlling the at least one processor to; detect that an output signal of the optical sensor falls to or below an optical threshold indicative of the wearable device not being proximate to the user'"'"'s skin; detect that a change in the capacitance value within a defined time interval is greater than or equal to a threshold change indicative of the wearable device not being proximate to the user'"'"'s skin; determine that the wearable device has been removed from the user in response to at least one of (i) detecting that the output signal of the optical sensor has fallen to or below the optical threshold and (ii) detecting that the change in the capacitance value within the defined time interval is greater than or equal to the threshold change; and de-authenticate the user from the wearable device in response to determining that the wearable device has been removed from the user.
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Specification