I understand how a RGB LED panel is driven from sparkfun's explanation (here).
From manufacturers like Huidu and Novastar I get that in a setup you often need a sending and receiving card. Like you could see (here at page 3)
In which the sending card divides the image you would like to show to the right parts and sends it to the right receiving boards.
But I wonder how the communication happens for an asynchronous LED sending card, if you display a static picture.
- Does the sending card once send the needed information to the receiving cards and they buffer the data in their memory and display the image stored in the memory?
- Or does sender card continuously send the same static image to the receiving cards?
I would like to know this because I'm thinking about building my own asynchronous LED sender card and send the data to existing receiving cards.