{HEAD ~ a common anode contact} at which the respective anodes of {TAIL ~ all} of said extraction diodes are connected together 
{ HEAD ~ a common anode contact } at which the respective anodes of { TAIL ~ all } of said extraction diodes are connected together
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH