This causes a disorder in a changing time between {TAIL ~ a blanking period} and {HEAD ~ a display period}, so that there occurs a one dot shift in a displayed picture 
This causes a disorder in a changing time between { TAIL ~ a blanking period } and { HEAD ~ a display period } , so that there occurs a one dot shift in a displayed picture
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH