Abstract: A mobile electronic device is operable to be used in a vehicle and determine a mental state of a user such as drowsiness. The mobile electronic device includes a display, a speaker, a memory element, a location determining component, a heartrate sensor, and a processor. The heartrate sensor is configured to provide a heartbeat signal indicative of a heartbeat of the user. The processor is configured to: acquire a beat-to-beat interval based upon the heartbeat signal, determine a current speed of the vehicle, and determine a drowsiness level of the user based at least in part upon the beat-to-beat interval, the current speed over the vehicle. The processor is configured to control the display and the speaker to alert the user of the determined drowsiness level while the determined drowsiness level exceeds a stored threshold determined drowsiness level.

Abstract: A mobile electronic device is operable to detect and display a mental state of a user such as drowsiness. The mobile electronic device includes a heartrate sensor, a processor, and a display. The heartrate sensor is operable to provide a heartbeat signal indicative of a heartbeat of the user. The processor is operable to: acquire a beat-to-beat interval based upon the heartbeat signal and determine a drowsiness level of the user based at least in part upon the beat-to-beat interval. The display is operable to display an indication of the drowsiness level.

Abstract: A mobile electronic device is operable to detect and display a mental state of a user such as drowsiness. The mobile electronic device includes a heartrate sensor, a processor, and a display. The heartrate sensor is operable to provide a heartbeat signal indicative of a heartbeat of the user. The processor is operable to: acquire a beat-to-beat interval based upon the heartbeat signal and determine a drowsiness level of the user based at least in part upon the beat-to-beat interval. The display is operable to display an indication of the drowsiness level.