Robert T. Aloe,Sankalita Saha,Stephen J. Waydo,Daniel J. Culbert
申请号：
US14845156
公开号：
US09766370B2
申请日:
2015.09.03
申请国别(地区):
US
年份:
2017
代理人:
摘要：
Algorithms for detecting whether a device is properly secured to a users skin are described. The operation of a device, such as a wearable device, can be adjusted based on whether the device is properly secured to a users skin (e.g., on-wrist) or not properly secured to the users skin (e.g., off-wrist). For example, certain functions can be disabled for power-saving, security or other purposes if the device is off-wrist. In order to avoid falsely identifying the device as off-wrist or on-wrist, algorithms for detecting whether the device is on-wrist or off-wrist can calculate one or more variances based on signals measured by a light sensor and compare the one or more variances with one or more thresholds. Comparing the one or more variances to the one or more threshold can improve the accuracy of wrist-detection algorithms.
