A multi display device synthesizes {HEAD ~ partial images}, by using {TAIL ~ multiple projectors} to construct one image 
by using
A multi display device synthesizes { HEAD ~ partial images } , by using { TAIL ~ multiple projectors } to construct one image
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH