> We found that running 2 full white images did a good enough job, without disrupting the experience too much
Some devices actually clear by outputting the invert of the image. Maybe this will be faster
Show HN: Building a 42-inch E-Ink frame for generative art
151–160 of 211 posts
Re: Show HN: Building a 42-inch E-Ink frame for generative art
#152Earlier quoted context omitted.
I’m sure the ad-driven subsidy on TVs plays a huge part. TV prices have declined as “dumb” TVs have been phased out of the market. A more niche tool like a large e-ink display might not make as much sense from to price this way since ad systems need large networks of users to be relevant.
people underestimate how long e-ink stagnated: it seems hard to imagine an alternate timeline where e-ink had taken the place of current LED outdoor billboards for example... until you realize we were decades away from LEDs being cheap and robust enough for outdoor signage when eInk was already fundamentally similar enough the tech we have now The company that owned the e-ink patents couldn't scale properly until the…
I remember seeing e-ink price tags at Kohls (American department store) as early as 2004-2005.
Re: Show HN: Building a 42-inch E-Ink frame for generative art
#153Earlier quoted context omitted.
The point is that it only uses power when changing the image, so a small battery can run it for a long time - not that it works during a power outage. (and of course it is a lot easier to change than a printed photo)
For $2,200, you could run a 35W 43” $160 TV for 29 years , if your power is $0.3/kWh. In reality, much more, with a dim display at night. I understand being eco friendly, but that’s an absurd, entirely negligible, justification. I would claim the reflective display is the killer feature.
As the person you are replying to clearly stated, it has nothing to do with drawing power from a wall socket. It’s about enabling new uses that work on battery power that can last for months/years instead of minutes.
Re: Show HN: Building a 42-inch E-Ink frame for generative art
#154That'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.
How is this any different than using a GPU to play games? They're both something people enjoy. Should I go play with sticks in the yard instead?
Re: Show HN: Building a 42-inch E-Ink frame for generative art
#155Earlier quoted context omitted.
The point is that it only uses power when changing the image, so a small battery can run it for a long time - not that it works during a power outage. (and of course it is a lot easier to change than a printed photo)
For $2,200, you could run a 35W 43” $160 TV for 29 years , if your power is $0.3/kWh. In reality, much more, with a dim display at night. I understand being eco friendly, but that’s an absurd, entirely negligible, justification. I would claim the reflective display is the killer feature.
Many of e-ink's use cases involve low power environments. This is often due to logistics - not cost.
Re: Show HN: Building a 42-inch E-Ink frame for generative art
#156I would love two wall mounted e-ink displays showing chess boards so my 14 year old son could play chess with his grandfather. I imagine the game keeping track of whose turn it is and being able to give voice commands to make moves. Then they could play games over a longer period of time, maybe make one move per day.
10 inch is probably workable and is also $2800 more affordable:
Re: Show HN: Building a 42-inch E-Ink frame for generative art
#157Earlier quoted context omitted.
people underestimate how long e-ink stagnated: it seems hard to imagine an alternate timeline where e-ink had taken the place of current LED outdoor billboards for example... until you realize we were decades away from LEDs being cheap and robust enough for outdoor signage when eInk was already fundamentally similar enough the tech we have now The company that owned the e-ink patents couldn't scale properly until the…
I remember seeing e-ink price tags at Kohls (American department store) as early as 2004-2005.
You probably saw the LCD based price tags which have been around for ages: https://www.fixturescloseup.com/2020/10/29/kohls-sloped-digi...
That said e-ink price tags aren't new, them being stupidly cheap (https://www.aliexpress.us/item/3256804488587338.html) and increasingly wide spread in availability is the relatively new part.
Re: Show HN: Building a 42-inch E-Ink frame for generative art
#158Well 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.
The E-ink patent holder is one of the most egregious cases of patent trolls. They won't lower the prices.
Re: Show HN: Building a 42-inch E-Ink frame for generative art
#159I 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.
This excellent article on dithering also explains blue noise in a simple way
Re: Show HN: Building a 42-inch E-Ink frame for generative art
#160I 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?
Usually something like volumetric data, animations, or other forms of data packed into something the GPU can swallow. I am not sure why you would apply the filters to those kinds.