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