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