SENSOR DETECTING VARIATIONS IN LIGHT OF A LIGHT SOURCE WITH A FUNCTION DETERMINING WHETHER THE LIGHT SOURCE NORMALLY OPERATES OR NOT BY COMPARING THE LIGHT EMITTED BY THE LIGHT SOURCE, OF WHICH THE AMOUNT OF THE EMITTED LIGHT IS VARIED BY A CONTROL COMMAND OF A USER, BEFORE AND AFTER A DETECTION COMMAND

摘要

PURPOSE: A sensor detecting variations in light of a light source is provided to measure the variations in the light without the influence of ambient light.;CONSTITUTION: A sensor detecting variations in light of a light source includes a photo-voltage converter (11), a switch unit (12), a capacitor unit (13), a comparator (14), and a logical operation unit (15). The photo-voltage converter converts the light emitted by the light source, which is dependent on a command of a user, into voltages. The switch unit is connected to the photo-voltage converter, and a short circuit and the opening control of the switch unit are possible by a user. The capacitor unit is connected to the switch unit and stores the voltages of the photo-voltage. The comparator is connected to the photo-voltage converter and the capacitor and compares voltages thereof. The logical operation unit is connected to the comparator and outputs a command executing state by performing a logical operation in respect to an output state of the comparator.;COPYRIGHT KIPO 2013;[Reference numerals] (11) Photo-voltage converter; (12) Switch unit; (13) Capacitor unit; (14) Comparator; (15) Logical operation unit; (AA) Measurement signals; (BB) Reset signals; (CC) Interrupt; (DD) Dimming