US Patent 10271800 Wearable electronic device and emergency method thereof

A wearable electronic device and an emergency method thereof are provided. The wearable electronic device includes a host and a strap. The host senses physiological information of a user by using a sensor. When the physiological information is determined as being abnormal, the host sends an enabling signal to the strap by a transmitting coil to enable the strap. After the strap is enabled, a warning light module displays a warning message based on the enabling signal.