This is {HEAD ~ a so called backlight} to enhance {TAIL ~ the contrast} of the display on the liquid crystal display section 2 
This is { HEAD ~ a so called backlight } to enhance { TAIL ~ the contrast } of the display on the liquid crystal display section 2
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH