means for applying {HEAD ~ a potential} to {TAIL ~ said electrodes} after a predetermined period of time to partially catch injected charge beneath said electrodes and to use caught charge as a bias charge, wherein said three means carry out operations thereof in a vertical blanking period 
means for applying { HEAD ~ a potential } to { TAIL ~ said electrodes } after a predetermined period of time to partially catch injected charge beneath said electrodes and to use caught charge as a bias charge , wherein said three means carry out operations thereof in a vertical blanking period
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH