When the threshold level VREF·1 is set slightly lower than the level V1 of white, a video signal 36 is obtained in which {HEAD ~ red}, blue and black are in {TAIL ~ the L level state} 
are in
When the threshold level VREF·1 is set slightly lower than the level V1 of white , a video signal 36 is obtained in which { HEAD ~ red } , blue and black are in { TAIL ~ the L level state }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL