>> instantly nerd-snipped er, what?
It's a term from an old XKCD: https://xkcd.com/356/
Oh, snipe not snip.
Show HN: Building a 42-inch E-Ink frame for generative art
71–80 of 211 posts
Re: Show HN: Building a 42-inch E-Ink frame for generative art
#72Earlier quoted context omitted.
what's your budget :) the Lilygo T5 with Touch screen + a lipo battery would have all the hardware you need just need to port chess to the platform after that https://www.hackster.io/Sergey_Urusov/arduino-mega-chess-d54... figuring out NAT traversal to get them talking to each other from each other's homes might be tricky/fun, but there may be ways around that...
Pretty cool at $36.36 USD https://www.lilygo.cc/products/t5-4-7-inch-e-paper-v2-3 It would be great to be able to buy this in a size that would mount easily into common photo frame formats. Ideally with a battery that could last months and optional power. If I was retired it's the sort of project I'd happily waste time on.
I am making these displays that come in a wooden frame:
https://shop.invisible-computers.com/products/invisible-cale...
You could render the current state of the chess game to an image and serve that image on a URL on the internet. Then you can connect the display to that image:
https://www.invisible-computers.com/invisible-calendar/image...
Admittedly that's still a lot of work from your side, and a little applet to keep running...
Re: Show HN: Building a 42-inch E-Ink frame for generative art
#73Earlier quoted context omitted.
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.
I just glanced, they still want about 500 bucks for the 13" screen and half of that for the board to drive it. While I have no clue what making the screen at a low scale might cost, the board cannot possibly be five times more expensive than a Raspberry Pi, can it?
Realistically you’re not paying for the hardware when you buy the driver board, but rather the software baked into those boards.
The waveforms, and the algorithms that create waveforms, used to drive eInk displays at reasonable speeds and produce high quality images are highly proprietary and very difficult to develop. In theory it’s easy to make an eInk display an image, but doing that in a reasonable period of time, when transitioning from potentially any starting state, and handling the crosstalk between pixels, makes creating good images on an eInk display pretty hard to get right.
Re: Show HN: Building a 42-inch E-Ink frame for generative art
#74I thought I'd heard of all the dithering options from https://tannerhelland.com/2012/12/28/dithering-eleven-algori... , but surprised to read there's another one ( https://ieeexplore.ieee.org/document/3288 ) that was used in this project.
Blue noise dithering seems to be a form of ordered dithering which is better than other forms of ordered dithering, but in terms of quality it is not as good as error diffusion dithering (look up the Wikipedia comparison on the statue of David). But blue noise dithering has the advantage that it can be implemented as a pixel shader, unlike error diffusion. So it can e.g. be used for video games. So I think for the picture frame error diffusion would have been a bit better.
Re: Show HN: Building a 42-inch E-Ink frame for generative art
#75[flagged]
Re: Show HN: Building a 42-inch E-Ink frame for generative art
#76Re: Show HN: Building a 42-inch E-Ink frame for generative art
#77I have a similar display, and also use blue noise dithering. Mine is driven in the backend by a web browser, which means I was able to abuse CSS and mix-blend-mode to do the dithering for me: ha-card::after { content: ""; background-image: url(/local/visionect-dither.png); background-repeat: repeat; position: absolute; height: 100%; width: 100%; display: block; mix-blend-mode: multiply; } The dithering texture used i…
what are the 3d and 4d textures?
(I could be wrong, but here's what I'm guessing) 3D refers to RGB, and 4D refers to RGB plus Alpha
Re: Show HN: Building a 42-inch E-Ink frame for generative art
#78This is really cool! I've wanted to buy something similar for a long time, but in RGB. I know Samsung makes the Frame, but its not hackable, and its a waste of power. I don't ever want the thing to function as a TV, just a way to display generative art.
At one time there apparently was this: https://mono.frm.fm/en/shop/ But the price was crazy. There's not much out there in terms of appropriately priced digital picture frames.
Re: Show HN: Building a 42-inch E-Ink frame for generative art
#79Well 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.
>For comparison a 42" full-color 60fps TV with remote, speakers, wifi, etc. etc. is $140. Because it's a lot easier and cheaper to manufacture large LCD panels at scale than E-ink film. >It seems like the patent holder could be making a lot more money if they dropped the price. I don't know any company or shareholders that would say no to making more money so if this would actually be true then it would, but that's n…
[deleted]
Re: Show HN: Building a 42-inch E-Ink frame for generative art
#80Samsung sells an LED TV specifically for this use case. Currently only at 4K. https://www.samsung.com/us/tvs/the-frame/highlights/
A friend has the Samsung Frame and I think you can only interface with it via the Samsung SmartThings app. It's quite closed. So you need an online thing for the TV and then you upload it into their app.
Yep, it's very locked down, and Art Mode behavior is often anti-user to promote their $10/month Art Store subscription. There are limited matting options and I believe it intentionally crops photos incorrectly, even if you upload in the correct aspect ratio. It also takes about a minute to scroll down to 'User Art' sections with how slow their UI is.