Haptic feedback is an important feature for wearable devices such as watches, fitness bands, etc. Current techniques to provide hardware feedback either cannot generate specially customized haptic feedback, or are limited to predefined haptic effects, and are limited by the battery and peak power draw available on a wearable device.
This document describes context-aware haptics that take into account the user state while using the wearable device. With permission from the user, the user state or activity, e.g., sitting, walking, running, etc. is detected by analyzing sensor readings from inertial measurement unit (IMU) sensor(s) that are included in the wearable device. Based on the user state, dynamic haptics are provided that adapt to the determined user state/ context.
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Wang, Jianxun; Mukherjee, Debanjan; Li, Chun Yat Frank; Viny, Andrew; and Lee, Haechang, "Contextual Haptics for Wearable Devices", Technical Disclosure Commons, (April 01, 2020)