3 ms·

I'm not sure I am reading the article correctly, but it looks to me that this new display tech uses less energy than EInk for the initial image creation, but th

I'm not sure I am reading the article correctly, but it looks to me that this new display tech uses less energy than EInk for the initial image creation, but then requires quite a bit more (0.25mJ/cm2 is greater than 0mJ/cm2, though still a minuscule amount) for continued display. I would guess that they probably are able to get a crisper image or perhaps full color with this new display tech while still being optimized for low-energy pull. Edit: Someone else posted this link which shows the Rdot displays do in fact have color capability - https://rdotdisplays.com/technology https://rdotdisplays.com/technology.

hn_throwaway_99 8y ago
In terms of your comment that it requires a little bit more energy for continued display, this isn't really the full story. The article states that this small update is only required once every 15 minutes, but my guess is the vast majority of E-Ink applications have use cases where the screen is updated more frequently anyway (e.g. for e-readers you are rarely going to spend more than 15 mins on a page). It is relevant for use cases like persistent artwork or ambient always-on displays, but I think for most of the common e-paper use cases it's a moot point.
- MRPockets 8y ago
  I had not considered that. I definitely "turn the page" much more than once every 15 minutes when I am reading on my ereader. When you take that into consideration, these Rdot screens are roughly 4 times as efficient AND have color as well.
  - plorntus 8y ago
    I couldn't tell from the link but is it only tunable once to a certain chosen colour at manufacture time? Afaik EInk can achieve 3 states (eg, black white and red)
    - Dylan16807 8y ago
      It's possible to do full-color e-ink in multiple ways, even if releases have been exceptionally slow.
gumby 8y ago
They way they phrase it it looks like you can choose the color for all the pixels (i.e. a black/white or green/white or red/white display). I hope I'm just misreading it.

hn_throwaway_99 8y ago

In terms of your comment that it requires a little bit more energy for continued display, this isn't really the full story. The article states that this small update is only required once every 15 minutes, but my guess is the vast majority of E-Ink applications have use cases where the screen is updated more frequently anyway (e.g. for e-readers you are rarely going to spend more than 15 mins on a page). It is relevant for use cases like persistent artwork or ambient always-on displays, but I think for most of the common e-paper use cases it's a moot point.

MRPockets 8y ago
I had not considered that. I definitely "turn the page" much more than once every 15 minutes when I am reading on my ereader. When you take that into consideration, these Rdot screens are roughly 4 times as efficient AND have color as well.
- plorntus 8y ago
  I couldn't tell from the link but is it only tunable once to a certain chosen colour at manufacture time? Afaik EInk can achieve 3 states (eg, black white and red)
  - Dylan16807 8y ago
    It's possible to do full-color e-ink in multiple ways, even if releases have been exceptionally slow.

gumby 8y ago

They way they phrase it it looks like you can choose the color for all the pixels (i.e. a black/white or green/white or red/white display). I hope I'm just misreading it.