An object of {TAIL ~ the present invention} is to reduce {HEAD ~ the brightness} of the background to improve the contrast 
An object of { TAIL ~ the present invention } is to reduce { HEAD ~ the brightness } of the background to improve the contrast
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH