means for applying a potential to {TAIL ~ said electrodes} after a predetermined period of {HEAD ~ 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 a potential to { TAIL ~ said electrodes } after a predetermined period of { HEAD ~ 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 OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD 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