SECURITY SYSTEM FOR NOTEBOOK COMPUTER

摘要

PURPOSE: A security system for a notebook computer is provided to increase the efficiency of a notebook computer by preventing another user from using the notebook computer in case that a user sets up a security state. CONSTITUTION: An internal control system unit(100) is composed of a sensing unit(110) which senses an input state, an oscillator(120) which generate a pulse signal(Vout1) using an output signal(Vcomp) of the sensing unit(110) and an alarm device(130) which generates an alarm sound according to the pulse signal of the oscillator(120). A liquid crystal module unit(200) is composed of a control unit(210) which receives the output signal of the sensing unit(110) and the oscillator(120) and a horizontal clock pulse output signal(CPHout), and generates a disturbance signal and a switching unit(220) which transmits the output signal of the control unit(210) to a monitor.