Mode detection method for computer system involves deactivating active usage mode of system before detecting again presence of user near system

摘要

The presence of a user (1) is detected to determine whether the user is near the system. When the user is near the system if the system is in active mode, the presence of the user is again detected, otherwise, the active mode of the system is activated, if the user is not near the system and the system is in the active mode, the active mode is deactivated. If the system is in the deactive mode and the user is not nearby, the system detects again if a user is present or not.