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has anyone ever tried drawing small dots of RGB on a white piece of paper, and can they verify if it is real black?
I understand the downside of color e-ink, as it was something we already expected (especially the resolution issue).
Probably the only way is to have a reflective white or metallic background, and a super transparent TFT layer in front; though that will also mess with the brightness of the device.
Another thing is they could use double layer screens; in the back your RGBW color e-ink; in the front a layer like from a solar powered calculator which will display transparent or black.
That would give deeper blacks, but also probably would take from the bright white, and take more battery.
The resolution should not be an issue since color generally only is used for photos; and text which is black generally only needs the high resolution.
What they need is small magnetic rotating cubes, that will rotate according to the magnetic field applied. a cube has 4 sides, so on one pixel you could have 4 colors; but they won't be able to display intensity.
At most for e-ink we would expect it to display 256 colors anyways; I don't know if 16bit colors (16Mil colors) is feasible.
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