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