{HEAD ~ The display apparatus} 22, wherein said oxysulfide is yttrium oxysulfide, and said luminescent center substance is {TAIL ~ europium} 
{ HEAD ~ The display apparatus } 22 , wherein said oxysulfide is yttrium oxysulfide , and said luminescent center substance is { TAIL ~ europium }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL