MOTION GESTURE INPUT DETECTED USING OPTICAL SENSORS

摘要

A wearable device having an optical sensor that can be used to recognize gestures of a user wearing the wearable device is disclosed. Light sources may be positioned on the back or skin-facing side of the wearable device, and an optical sensor may be positioned near the light sources. During operation, light is emitted from the light sources and can be sensed using an optical sensor. Changes in the sensed light can be used to recognize user gestures. For example, light emitted from a light source may be reflected off the wearer's skin, and the reflected light may be sensed using an optical sensor. When the wearer gestures in a particular way, the reflected light may change perceptibly due to muscle contraction, device shift, skin stretching, or changing distance between the optical sensor and the wearer's skin. The recognized gestures may be interpreted as commands for interacting with the wearable device.