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A comment on Show HN: A 13.3" battery-powered e-paper picture frame to display digital art.

Re:Show HN: A 13.3" battery-powered e-paper picture frame to... by solarkraft on Tuesday June 29, 2021 @07:38PM (#27683191)
I love e-ink and these look really cool, but yeah, that price. Where are you currently getting your displays? You may be interested in EPDiy [0] (controlling cheap left over Kindle DX screens with an ESP32) and Inkplate [1] for some inspiration on cheaper sourcing.

For reference: the 6" Inkplate costs around 100€ and I think you could fairly comfortably build a 10" EPDiy device at around that. That's without all the fanciness of course, with it I reckon it should be possible to sell these things at around 200€ each, which would probably make them a lot more interesting to people.

That said: I'm excited for color e-ink screens appearing on the market. The amount of devices released lets me hope at least some will make it to a secondary market.

[0]: https://hackaday.io/project/168193-epdiy-976-e-paper-control... [1]: https://inkplate.io/

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Re:Show HN: A 13.3" battery-powered e-paper picture frame to... by clash on Tuesday June 29, 2021 @08:04PM (#27683383)
I actually have an Inkplate at home. The 8 gray shades they support are unfortunately not evenly distributed, which makes it difficult to display images in good quality.

EPDiy looks interesting, though.

[ Parent | on HN ]
Re:Show HN: A 13.3" battery-powered e-paper picture frame to... by KMnO4 on Tuesday June 29, 2021 @11:16PM (#27684460)
What does it do for shades that aren’t those 8? Does it apply any sort of dithering?

Maybe it just needs a better lookup table or some preprocessing.

I’ve seen some impressive 1-bit displays, so 8 shades shouldn’t be harder than that.

[ Parent | on HN ]
Re:Show HN: A 13.3" battery-powered e-paper picture frame to... by clash on Wednesday June 30, 2021 @01:39PM (#27691354)
You can't define more than 8. The API allows only 3 bit input. I also tinkered with the lookup table, and was able to create a lot of different gray shades, but I was not able to produce ~40-60% gray.
[ Parent | on HN ]