[HN Gopher] Turning an eInk screen into a monochrome art gallery
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Turning an eInk screen into a monochrome art gallery
Author : edent
Score : 39 points
Date : 2021-09-26 12:08 UTC (10 hours ago)
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(TXT) w3m dump (shkspr.mobi)
| whartung wrote:
| So, a curiosity.
|
| Could you have, literally, a gallery of eInk art, where all of
| the panels have no power. Aren't even plugged in. Someone grabbed
| a bunch of displays, plugged them in to a machine, rendered the
| picture, yanked them out and framed them and stuck them on the
| wall.
|
| Will they last? As I understand it eInk is a "no power" display.
| Could this be done?
| easton wrote:
| If I'm not mistaken, this is how Best Buy does their price tags
| now. They have eInk (or, eInk looking) displays on the end of
| racks that can be changed out with power but otherwise seem to
| work quite well.
| atatatat wrote:
| Is this not NFTs?
| edent wrote:
| Yes. In fact, my display goes to sleep between refreshes and
| can last a really long time using no power.
|
| However, with the Nook I'm using, the Android subsysyem
| eventually realises it is out of power and will displau a
| static "charge me" screen.
|
| If you built your own device, you could detatch the screen from
| the power and the image would stay on.
| [deleted]
| kadoban wrote:
| Sure. I have a couple eink devices, if they're not powered they
| just keep whatever image they had.
|
| They're not exactly the best possible displays for all art
| though. The "whites" aren't all that white is the biggest
| problem. It's perfect for a book, and I even really like it for
| comics, but it's probably a bit limiting for art.
|
| That's not even mentioning that the good ones are only
| grayscale. Color ones exist, but the colors look _badly_ washed
| out.
|
| They're also pretty small and/or expensive.
|
| Basically you'd be better off in every way with just a printer,
| any kind of printer.
| tartoran wrote:
| A printer would be a cheaper solution
| mdp2021 wrote:
| > _A printer would be a cheaper solution_
|
| Only if you do not plan to change the visualized contents
| frequently.
| kwhitefoot wrote:
| A cheap black and white laser produces pictures at least as
| good as most e-ink devices and in higher resolution. A
| toner cartridge for my Canon costs about 100 USD and will
| print 2000 sheets. 2000 sheets of A4 cost about 30 USD.
|
| An e-ink display that size costs 100s of USD so I can
| afford to reprint the picture thousands of times before I
| hit the cost of the e-ink display.
|
| And anyway, art galleries do not change the content
| frequently so they could afford to use a higher quality
| printer and higher quality paper.
| mdp2021 wrote:
| ...And you will probably be intrigued to know about the
| "Advanced Color e-Paper (ACeP)" technology, which uses actual
| multiple pigments inside each dot.
|
| It currently has low pixel density, it is very costly, the
| update may be very slow (in some models it takes over 8 seconds
| to change the states of its dots), and it should be using
| trichromy instead of quadrichromy (the declared total colours
| amount to 4096, which suggests 16^3, where 16 is the number of
| states in the traditional B/W E-Ink displays). The actual real
| visual effect "in presence" is to be seen - the ability to have
| big sized changeable printouts is there.
|
| ACeP display, 31.2'', 1280x720 (50ppi) at 2300$:
| https://shopkits.eink.com/product/31-2%CB%9D-color-epaper-di...
| mdp2021 wrote:
| > _As I understand it eInk is a "no power" display_
|
| The term is 'bistable': once the state is changed, no energy
| expense is needed to keep it. To change the state, a relatively
| considerable amount of energy is needed.
|
| > _Will they last_
|
| You have turned the stone, the white side facing up: it will
| last.
|
| > _Could you have, literally, a gallery_
|
| Yes, as the EPD dots are changed to the desired states, the
| displays are like physical content for picture frames, "you
| could hang them on the walls".
| radley wrote:
| FWIW, there are companies already doing this:
|
| https://getjoan.com/
|
| https://www.ionnyk.com/
|
| https://www.eink.com/architecture.html
| LegitShady wrote:
| They've mistaken a 'digital picture frame' for an art gallery.
| tartoran wrote:
| Perhaps the audience would be interested in the frames
| themselves and ignore the actual content
| capableweb wrote:
| Ultimately, maybe the audience would be interested in
| becoming framed themselves instead, and ignore the actual
| outside content.
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