You can buy fairly cheap displays from https://www.waveshare.com/ along with Raspberry Pi HATs and the PaperTTY project gives the power to do a partial refresh instead of full screen refresh on these screens. The waveforms are available in the Waveshare open source code and you can modify them as you will.
I am getting my screen next week and hoping to make my own little emacs only laptop using a Rpi Zero.
You forgot the best resource https://github.com/joukos/PaperTTY discussed at https://news.ycombinator.com/item?id=17896825
You can buy fairly cheap displays from https://www.waveshare.com/ along with Raspberry Pi HATs and the PaperTTY project gives the power to do a partial refresh instead of full screen refresh on these screens. The waveforms are available in the Waveshare open source code and you can modify them as you will.
I am getting my screen next week and hoping to make my own little emacs only laptop using a Rpi Zero.