{HEAD ~ The dual shift register} 1, wherein gate and drain terminals of {TAIL ~ the first active switching element} are connected with the first AC voltage line 
{ HEAD ~ The dual shift register } 1 , wherein gate and drain terminals of { TAIL ~ the first active switching element } are connected with the first AC voltage line
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH