LIGHTING BRIGHTNESS FOR CONTROL METHOD

摘要

PURPOSE: An illumination brightness value controlling method is provided to maintain brightness value of a lamp constant by automatically detecting a change of brightness value of the lamp and adjusting the brightness value to be identical with a reference brightness value automatically. CONSTITUTION: A reference brightness value for each pixel of a grey level chart attached on the lower part of a suction nozzle is adjusted by a controller(S100). Several images are obtained by photographing the grey chart with a camera(S200). The brightness value is measured for each pixel of the grey level chart from the several images. It is determined whether the brightness value of each pixel is identical to the reference brightness value(S300).