This ensures that {HEAD ~ only the certain polarized light} is permitted to be {TAIL ~ incident} on the liquid crystal display panel 2 
This ensures that { HEAD ~ only the certain polarized light } is permitted to be { TAIL ~ incident } on the liquid crystal display panel 2
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH