Patent ID: 7796044
Filing Date: 2010-09-14
Classification: G06F

Abstract:
1. An eye protection apparatus comprising: a sensor adapted for sensing the presence of a person within a predetermined distance range in front of a monitor and outputting a pulse signal; an amplifier unit connected to the sensor for receiving the pulse signal and outputting an amplified signal; a comparator connected to the amplifier unit to receive the amplified signal, and comparing the amplified signal with a predetermined signal; a micro processing unit (MPU) connected to the comparator to receive a comparison result and outputting a control signal according to the result; and an alarm circuit connected to the MPU to receive the control signal to control power to the monitor, wherein a filter circuit is connected between the sensor and the amplifier unit, the filter circuit comprises a first resistor, a first capacitor connected in parallel between an output of the sensor and ground, and a second resistor and a second capacitor connected in series between the output of the sensor and ground.