If there is no video signal, the present invention displays {HEAD ~ a predetermined pattern}, thereby outputting {TAIL ~ a pleasant screen} to a user 
outputting
If there is no video signal , the present invention displays { HEAD ~ a predetermined pattern } , thereby outputting { TAIL ~ a pleasant screen } to a user
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH