Each module having a one to one correspondence with {HEAD ~ a bit} in a data array and comprising X columns and Y rows of {TAIL ~ pixels} 
Each module having a one to one correspondence with { HEAD ~ a bit } in a data array and comprising X columns and Y rows of { TAIL ~ pixels }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL