Hub75 modules

Hub75 is a widely used connector and signalling style for LED modules. RGB data, clock, latch, output-enable, and row-select lines run over a ribbon from the receive card or hub board into the module. Drivers on the module use that stream, with row scanning, to light the matrix.

Not every commercial wall uses a textbook Hub75 pinout. Many do something in the same family. The point for buyers is simpler: the receive card, hub, and modules have to be a matched set. Mixing leftover ribbons from another product line is a good way to get a blank or scrambled cabinet.

When colour depth goes up, the amount of data per pixel goes up. That can mean fewer pixels per cable run, faster clocks, or more parallel links. That is a system design detail, not something to chase on a scoreboard that only needs clean logos and a clock.