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Posted on 7th October 2020
Ask someone to point to their computer and they usually point to their monitor. The display is a huge part of a machine's personality. It is also likely to be its largest power drain. So in a portable device, it's doubly important to get right.
My first thought was e-ink - it sips minuscule power and looks beautiful at rest. But, when stirred, will flash desperately to shed its soiled pixels. Even partial updates feel too slow. I need something more immediate.
That's when I remembered the Sharp Memory Display. It sits somewhere between e-ink and an LCD: daylight readable and low power but with a faster refresh rate. And luckily, Adafruit have now released a breakout board for the larger 2.7" version.
It's a little limited in pixels, at only 400x240 resolution, but consider all the great VGA games that were released in only 320x200: Doom, Worms, Prince of Persia, Indiana Jones and the Fate of Atlantis… Ok, I'm cheating a bit. The Memory display is monochrome - 1-bit per pixel - and those games all use colour. But I think 1-bit graphics might develop some of the personality I'm searching for.
The Macintosh Plus had a 512x342 pixel 1-bit display and buckets of personality. Susan Kare's fonts and icons looked excellent on it.
Want a more modern example of 1-bit artwork? Just look at this beautiful screenshot from Return of the Obra Dinn:
Or these Creative Commons pixel fonts by fontenddev:
So I'm not worried about the 1-bit colour or the 400x240 pixels. If the PalmPilot managed with a 160x160 monochrome display, then I'm sure I can write some useful programs for this screen too.
Now I just need to write some code to drive it.
Futher reading:
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