To solve the problems in the prior, one has to increase {TAIL ~ the driving current} of {HEAD ~ the TFT} within limited driving circuit area 
To solve the problems in the prior , one has to increase { TAIL ~ the driving current } of { HEAD ~ the TFT } within limited driving circuit area
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH