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Show HN: Building a 42-inch E-Ink frame for generative art

eliot.blog

21–30 of 211 posts

Re: Show HN: Building a 42-inch E-Ink frame for generative art

#21
Really cool project!

If you're into looking at different dithering techniques, there are a few interesting ones compared in this old CodeGolf question (disclaimer: I'm the one with the Fortran answer)

https://codegolf.stackexchange.com/questions/26554/dither-a-...

Re: Show HN: Building a 42-inch E-Ink frame for generative art

#22
post #17

In terms of battery powering it, I wonder how many amps it takes to power a refresh. The Salt driver is 12v, which I guess can be shut down between refreshes.

In my e-ink newspaper, I have the driver board behind a relay (because it had an annoying idle current draw even when you tell the driver chip to go to standby, and they even added an annoying power LED ...) and do just fully shut it off between refreshes.

There's some projects that forego a driver ASIC entirely and drive the waveforms directly from a MCU, although I guess this large panel has a different voltage domain.

Re: Show HN: Building a 42-inch E-Ink frame for generative art

#23
post #9
post #5

That's a very neat project. The only issue I have with it is that it's basically a passive energy waster. It produces images by burning GPU power, when it could instead curate art from an existing amount of art (of which there is more to ever go through, almost in any category). Some projects that use AI could be replaced with other tech and be much more efficient.

I think it simply uses some API to generate the images.

How does the API generate the images then?

Re: Show HN: Building a 42-inch E-Ink frame for generative art

#26

When are we going to have cheaper e-ink screens available? Anyone know if the situation has changed in the last couple of years? See: https://news.ycombinator.com/item?id=26143779

Realistically, it’ll be when the patents expire.

My understanding is it's much more about demand than patents.

LED panels got cheap because we built factories that pump out a lot of them.

Re: Show HN: Building a 42-inch E-Ink frame for generative art

#27
post #11

Earlier quoted context omitted.

Realistically, it’ll be when the patents expire.

Which patents need to expire to have cheaper e-ink displays?

They’ll just keep repeating thus trope whenever an e-ink project comes up. (They don’t think that LCD screens have patents too?)

Re: Show HN: Building a 42-inch E-Ink frame for generative art

#30
post #18

Well done. There would be so many more cool applications of e-ink if it wasn't $2,500 for a 42" display: https://shopkits.eink.com/en/product/detail/42''MonochromeeP... (minimum order 3) For comparison a 42" full-color 60fps TV with remote, speakers, wifi, etc. etc. is $140. It seems like the patent holder could be making a lot more money if they dropped the price.

Well, Apple’s 32” Pro Display XDR is $5000, there’s always something.
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