wherein the left eye image signal and {HEAD ~ the right eye image signal} are sequentially separated in {TAIL ~ any order} within a second repetition period in which frames having the same image content are repeated for two frames 
are sequentially separated in
wherein the left eye image signal and { HEAD ~ the right eye image signal } are sequentially separated in { TAIL ~ any order } within a second repetition period in which frames having the same image content are repeated for two frames
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH