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#1 |
Enthusiast
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¿¿300ppi color eink when??
Greetings,
The most recent devices and premium ones with color eink come with 150ppi in color mode. I understand that the technology is evolving but I couldn't help wondering if there will be ever 300ppi color eink. ¿Are there any manufacturers testing or developing 300ppi color eink at the moment? ¿What people think is the timeline for 300ppi color eink to arrive? Right now 150ppi color looks quite good, so it's not a bad investment until 300ppi devices appear. Thanks |
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#2 | |
Resident Curmudgeon
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Quote:
As to when, maybe never. That's my guess. |
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#3 |
the rook, bossing Never.
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We have seen no increase in over 11 years in mono eink ppi beyond 300.
A 300 colour would need 600 mono. Kaleido is 4 years old and could have been done in 2005. It's only translucent coloured dots that don't fill the mono pixel. The ACeP is better colour and older, but about 10 times slower. The Kaleido or mono eink is about 150 to 300 slower than other current displays. Mirasol was more than 15 years ago. One product and nothing more. The future is matt LCD and matt QLED. Battery life for reading on some phones and tablets with paper-like LCD or OLED is now comparable to some eink readers. The only future for eink is niche mono dedicated ereaders, unless an new technolgy is discovered/ invented. |
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#4 | |
Bibliophagist
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See E Ink Gallery™ 3 for more information. |
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#5 | |
the rook, bossing Never.
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Most Gallery 3 panels are lower than 300 dpi because signage doen't need it. It seems doomed even in retail display market. |
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#6 | |
Wizard
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#7 | |
Resident Curmudgeon
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#8 | ||
the rook, bossing Never.
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Join Date: Jun 2017
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Colour bistable screens obviously needs a new technology. Kaleido is just a CFA (translucent printed pattern) on mono eink, which is only marginally better now than 11 years ago. While Gallery / ACeP is a better approach being Subtractive colour link print, thus could be 3 to 5 brighter than CFA on mono, it was first announced May 2016, that's over 8 years ago, and it seems unlikely to ever be fast enough for an ereader. It's aimed at retail signage, and losing there. It seems doomed to follow Mirasol and Plasma TVs into the bin. Kaleido is nothing new at all. Baffling why they ever bothered with Triton (except it used an original type odf LCD CFA). Kaleido is limited by three things: 1) It's just dots on a mono panel, so always 1/2 resolution. 2) It's R G B dots that only partially covering each pixel, so pastel. This is what allows a pseudo mono mode. 3) R G B dots in theory can't have a brightness better than 1/6th of mono, if perfect and covering the pixel. Physics that can't be beaten. That's why they only partially cover a pixel, to increase brightness. They can tweak Kaleido dot density and size, but it's still only good for comics and much worse without front light than mono eink. All the advantage of eink over the best matt screen OLED, QLED and LCD panels is lost when you have to have a front light. So Kaleido is doomed. A short term attempt by companies that only do eink to have colour. |
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#9 |
Wizard
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Yes, we already know that Kaleido is a poor technology and that Gallery 3 is slow. The question is whether good colour e-paper will ever exist. E-Ink currently has no incentive to develop Gallery 4 or anything else when people are willing to buy low-effort Kaleido devices.
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#10 | |
the rook, bossing Never.
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Almost all ereaders use E Ink Corp. panels. There used to be more companies, but most were bought by E Ink Corp and one bought by Amazon and buried. Plastic Logic is one of the originals, 20 years ago. Their web site address redirects to e pi. https://www.e-pi.com/displays/ The Colour panels are not as bright as the web site suggests. Allegedly UK with a German R&D. |
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#11 | |
the rook, bossing Never.
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Quote:
We know Fusion works. Stars at night and Sun in daytime. We think a scaled down version might be possible. But OTOH there is no indication that a bistable colour panel (aka color e-paper) fast enough for an e-reader is possible. Meanwhile you can now read on some tablets or phones for up to 30 hours (total) and get paper-like QLED, OLED and LCD screens. Still not as good as mono-eink in decent ambient light with front-light off, but as good as mono with front-light, if properly adjusted. Also Dark mode is better. |
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#12 |
the rook, bossing Never.
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Speed issue:
The bistable displays like E ink Corp are mechanical. Admittedly the DLP system is also mechanical, but the mirrors in it are a tiny fraction of the size and not in a liquid. The epaper/eink/ACeP panels use particles in a liquid, so they are inherently slow. The higher speeds quoted are usually without intermediate levels, simply black or white with mono ink (or colour via CFA of Triton or Kaleido). The ACeP/Gallery 3 panel cells are inherently even slower due to the C Y M W layers. |
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