Patent ID: 8810413

Claim:
A method to detect user fatigue comprising: detecting a head position of a user viewing a display device and detecting an amount of movement of the head position of the user with a sensor; determining a posture of the user with the sensor by detecting a distance between at least one of a chest or shoulders of the user and the display device, and comparing the distance with a predetermined distance; detecting an ambient light condition around the user with the sensor; determining a duration of the user viewing the display device; identifying a user fatigue in response to the head position, the posture of the user, and the ambient light condition, wherein the fatigue includes at least one from the group comprising of an eye strain of the user, a neck strain of the user, and a back strain of the user; identifying a level of the user fatigue based on at least the amount of movement of the head position; and providing a response to the user with the display device based on the level of the user fatigue.