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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 resolu

by mark-r 10y ago

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.

grenoire 10y ago
'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.
- sharpy 10y ago
  "ACeP achieves a full color gamut, including all eight primary colors, using only colored pigments." ... I want one now :-)
- badsock 10y ago
  Not a correction (given that they posted after you), but if krasin's mention of 32k colours is right then it's 5bpp.
  - mark-r 10y ago
    That's actually 5 bits per channel, or 15 bits per pixel altogether. Quite an achievement if true.
    - badsock 10y ago
      Ah, I meant per channel but I wrote per pixel - thanks for the correction.
  - moyix 10y ago
    Doesn't that mean 15 bpp? Since 2^15 = 32K? Or am I misunderstanding what bpp is?
delecti 10y ago
Current e-ink screens are 16 "colors" (grayscale shades) per pixel. Why do you suspect this has one fewer bit per pixel than that?
- mark-r 10y ago
  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.
krasin 10y ago
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-breakthrough-but-its-only-for-signs/ http://www.engadget.com/2016/05/24/e-ink-announces-a-color-b...
- imaginenore 10y ago
  So since they have 8 pigments, it's 5 bits then. 8^5 = 32768 That explains the posterization.

by mark-r 10y ago

grenoire 10y ago

'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.

sharpy 10y ago
"ACeP achieves a full color gamut, including all eight primary colors, using only colored pigments." ... I want one now :-)
badsock 10y ago
Not a correction (given that they posted after you), but if krasin's mention of 32k colours is right then it's 5bpp.
- mark-r 10y ago
  That's actually 5 bits per channel, or 15 bits per pixel altogether. Quite an achievement if true.
  - badsock 10y ago
    Ah, I meant per channel but I wrote per pixel - thanks for the correction.
- moyix 10y ago
  Doesn't that mean 15 bpp? Since 2^15 = 32K? Or am I misunderstanding what bpp is?

delecti 10y ago

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

mark-r 10y ago
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.

krasin 10y ago

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-breakthrough-but-its-only-for-signs/ http://www.engadget.com/2016/05/24/e-ink-announces-a-color-b...

imaginenore 10y ago
So since they have 8 pigments, it's 5 bits then. 8^5 = 32768 That explains the posterization.