It should be noted that one frame time period is referred to a time period during which {HEAD ~ a display device} displays {TAIL ~ one image} 
It should be noted that one frame time period is referred to a time period during which { HEAD ~ a display device } displays { TAIL ~ one image }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL