This is a 10x10 display which can be controlled using only a single line of redstone!

It's a proof of concept that I built a while ago. It is divided into two parts, the display and the display controller. The display controller encodes and sends over the information to the display serially, using only a single line of redstone. Transferring one image takes slightly over 10 seconds at a rate of 10 pixels/second.

The advantages of this are that it is very compact (both the display and display controller, as well as the line itself) while still remaining relatively fast, and that it could be built relatively easily in survival mode.

It would also be possible to build several connected controllers and displays to make some sort of billboard/announcement system for servers.

While this is a 10x10 display, it could relatively easily be expanded to larger sizes.

I originally built a version back in 2016, but it was twice as slow and the display controller was relatively bulky. I recently rebuilt the display controller, so it's a lot smaller and faster now.