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