Patent ID: 6802016
Filing Date: 2004-10-05
Classification: G06F,Y02D

Abstract:
A computer device having a sensing circuit for determining a user status and switching a computer accordingly, comprising:a signal generator that sends out a transmission signal to a detection region close to the computer for determining whether a user is inside or outside the detection region; a signal receiver for receiving the transmission signal from the detection region and sending out a user status signal according to the present or absence of the user; an analog/digital converter for converting the status signal into a digital signal; a delay unit connected to the analog/digital signal for receiving the digital signal and sending out a delay signal after a delay period; a logic circuit connected to the delay unit and the analog/digital converter for receiving the digital signal and the delay signal and producing a logical signal after a logical computation; a microprocessor connected to the logic circuit for receiving the logic signal and outputting a processing signal; and a power-triggering mechanism connected to the microprocessor for starting the computer if the processing signal indicates the users is inside the detecting region and the computer is off, and for shutting down the computer if the processing signal indicates the user is outside the detecting region and the computer is still on.