The liquid crystal display device 6, wherein any one of said prism sheet and said diffusion sheet constituting said optical sheet member has a sheet positioning hole engaging with {HEAD ~ said positioning pin} on {TAIL ~ said light guide plate} 
The liquid crystal display device 6 , wherein any one of said prism sheet and said diffusion sheet constituting said optical sheet member has a sheet positioning hole engaging with { HEAD ~ said positioning pin } on { TAIL ~ said light guide plate }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 TAIL TAIL