{HEAD ~ means} for applying 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 
{ HEAD ~ means } for applying 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
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH 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