Convert logic signals to be able to supply/sink higher currents
OK so you have two problems. 

The 80 wide should be using something like the TLC59213 8-Bit Parallel In and Out Darlington Source Driver With Latch. That can source more current that you will ever need.

The other side, you pretty much need 56 drivers. Perhaps suitable mosfet at the end of each column.







simulate this circuit &ndash; Schematic created using CircuitLab

Though you may not need the transistor in there if you use an open-collector output gate before that.