Wearable devices, e.g., smartwatches, are configured to wake up when the user taps on the touchscreen. In order to enable the device to respond to touch, the touchscreen is kept awake and ready to detect touch which consumes power. Turning off the touch panel can extend battery life; however, doing so leads to device not waking up upon the user touching or tapping on the touchscreen.
The techniques of this disclosure detect taps or touches on the display of a wearable device using an onboard inertial measurement unit, e.g., accelerometer, and enable the touchscreen to be switched off, thereby saving power. The techniques maintain a user experience similar to the current one, e.g., from a user interaction perspective, users continue to simply touch / tap the screen in order to wake up the device.
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Mendis, Indika Charles, "Detecting wake-up taps on wearable devices using accelerometer", Technical Disclosure Commons, (November 01, 2018)