Are old monochromatic displays, like the ones used on the original Gameboy (bad example, I know), much more power efficient than modern colour LCD/LED/OLED displays? If so, why are they so hard to find?
I was looking for a low-power display, either black and white or colour, but noticed that there aren't any. I thought that naturally, the monochromatic displays, like the kind seen on the original Gameboy or industrial devices, would be ideal.
But I couldn't find any, save for some smaller ones used in Arduino modules. Most of what I find are TFT colour displays and I'm afraid that these will drain out my batteries very quickly (e.g. based on my experience with my phone).
I'm looking for a display >= 160x144 that will use as little power as possible. This (hobby project) device of mine will be portable and I am hoping to have it last for months on regular AAA batteries, with the display/device being on for ~1 hour per day.