Hand-worn device for surface gesture input

摘要: Embodiments that relate to energy efficient gesture input on a surface are disclosed. One disclosed embodiment provides hand-worn device may include microphone configured capture an audio and generate signal, accelerometer motion controller comprising processor memory. The be detect wake-up based the signal. wake from low-power sleep mode in which is turned off enter user interaction interpretation on. Then, contemporaneously receive signal decode strokes. Finally, period of inactivity return mode.