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Comment by mark-r | Hacker News Reader

They don't say how many bits per pixel they achieve. I suspect it's quite small, maybe as low as 3 - the sample image shows some posterization. With high resolution and dithering it should be sufficient for the intended use case of signage.

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Engadget ([1]) tells us:

...developed a display that can show up to 32,000 colors.

[1] http://www.engadget.com/2016/05/24/e-ink-announces-a-color-b...

So since they have 8 pigments, it's 5 bits then.

8^5 = 32768

That explains the posterization.

'Including eight primary colours' probably means 3bpp indeed. However, 1600x2500 at 150 ppi is indeed enough to make it practically seamless with dithering; especially on E Ink displays. I can hardly make the individual pixels on my 1920x1090 phone, so I expect a higher resolution to achieve a good effect regardless of the bpp.

"ACeP achieves a full color gamut, including all eight primary colors, using only colored pigments."

...

I want one now :-)

Not a correction (given that they posted after you), but if krasin's mention of 32k colours is right then it's 5bpp.

That's actually 5 bits per channel, or 15 bits per pixel altogether. Quite an achievement if true.

Ah, I meant per channel but I wrote per pixel - thanks for the correction.

Doesn't that mean 15 bpp? Since 2^15 = 32K?

Or am I misunderstanding what bpp is?

Current e-ink screens are 16 "colors" (grayscale shades) per pixel. Why do you suspect this has one fewer bit per pixel than that?

Because the only concrete claim they make is that the primary colors are included. At least in this article; I see that someone has responded with another that has more information.

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