The black matrix prevents the light leakage in {HEAD ~ regions} occupied with the gate lines, the data lines, and {TAIL ~ the thin film transistors} 
The black matrix prevents the light leakage in { HEAD ~ regions } occupied with the gate lines , the data lines , and { TAIL ~ the thin film transistors }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL