Quote:
Originally Posted by pdurrant
RGB because it's an additive system - turn on all three RGB and you get white.
If, instead of a filter over the top of an eInk screen, each pixel had a vertical stacking of controllable colour elements, a CMY scheme would be the one to use, as then it would be a subtractive scheme (like printers inks).
It's not a question of convenience of the source formats, but just concerned with whether you're generating your colours by adding light together to make colours and eventually white or subtracting from white light to make the colours and eventually black.
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In a sense, the current filters are subtractive, in that they subtract everything but either red, green or blue from each coloured pixel. Of course, the light from separate filtered pixels is added back together again by the eye to produce other colours. Could not the current system be replaced by fixed filters that are cyan, magenta and yellow instead of red, green and blue? I think it could, but I guess it wouldn't really be CMYK because it doesn't overlap the CMY components to get proper subtraction. The mapping from RGB to the new system would also be different than the standard RGB->CMYK mapping. Anyway, this is what I had in mind when I said it didn't make sense to use it in place of RGB. You're right that it wouldn't really be CMYK anyway.