6 ms·

The devices I've seen with color e-ink need to intermittently flash the screen. I could live with a slow refresh rate, but having my screen flicker black once o

The devices I've seen with color e-ink need to intermittently flash the screen. I could live with a slow refresh rate, but having my screen flicker black once or twice a minute is a deal-breaker.

amelius 5y ago
It would be a shame if this e-ink display that is advertised as "natural" induces more epileptic events than "artificial" light-emitting panels.
- mmastrac 5y ago
  I don't think there's a worry about epileptic events with the short flash sequences of e-ink. I'm not a neurologist, but I think you need a reasonably long sequence of continued flashing to trigger an event.
  - andrewshadura 5y ago
    In fact, photosensitivity is relatively rare even among people with diagnosed epilepsy.
wizzwizz4 5y ago
In theory, they could do the “flicker black” as a black band that moves across the screen every so often.
Tagbert 5y ago
There is no ongoing flicker on e-ink displays. The display is absolutely stable with no flicker while you’re reading as there is no refresh. If you trigger a page change the page redraws the new image in a fraction of a second. It looks a bit like a fast cross-fade. If you are updating smaller regions of the screen it is fast enough not to notice. Scrolling would still be a problem as that requires a much faster refresh rate. Such fast refresh would eliminate one of the major benefits of e-ink which is the low power. If you were to refresh e-ink at 30-60Hz it would likely use as much or more power than an LCD.
- dredmorbius 5y ago
  There's a periodic full refresh to clear any "ghosted" pixesl, often at a user-definable frequency. This occurs only during a display update, so yes, as long as you're looking at static text, there won't be a flash. The trade-off is of pixel ghosting vs. flash. The more frequently the screen is fully refreshed, the less ghosting. In practice, I tend to set this value to about 20 refreshes for reading texts, and will frequently manually refresh the display when reading Web content in a browser where scrolling is more prevalent. For monospace (terminal) displays, the fact that each character tends to update in the same screen cell makes the ghosting issue less significant and noticeable. What happens is that the background gets somewhat greyer as text is read or scrolled, but there isn't the effect of strong imprints under the text as with graphic or typeset content. A refresh largely has the effect of brightening the background. Noticeable, yes. Annoying? Largely not.
deleted 5y ago
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The devices I've seen with color e-ink need to intermittently flash the screen. I could live with a slow refresh rate, but having my screen flicker black once or twice a minute is a deal-breaker.

amelius 5y ago

It would be a shame if this e-ink display that is advertised as "natural" induces more epileptic events than "artificial" light-emitting panels.

mmastrac 5y ago
I don't think there's a worry about epileptic events with the short flash sequences of e-ink. I'm not a neurologist, but I think you need a reasonably long sequence of continued flashing to trigger an event.
- andrewshadura 5y ago
  In fact, photosensitivity is relatively rare even among people with diagnosed epilepsy.

wizzwizz4 5y ago

In theory, they could do the “flicker black” as a black band that moves across the screen every so often.

Tagbert 5y ago

There is no ongoing flicker on e-ink displays. The display is absolutely stable with no flicker while you’re reading as there is no refresh. If you trigger a page change the page redraws the new image in a fraction of a second. It looks a bit like a fast cross-fade. If you are updating smaller regions of the screen it is fast enough not to notice. Scrolling would still be a problem as that requires a much faster refresh rate. Such fast refresh would eliminate one of the major benefits of e-ink which is the low power. If you were to refresh e-ink at 30-60Hz it would likely use as much or more power than an LCD.

dredmorbius 5y ago
There's a periodic full refresh to clear any "ghosted" pixesl, often at a user-definable frequency. This occurs only during a display update, so yes, as long as you're looking at static text, there won't be a flash. The trade-off is of pixel ghosting vs. flash. The more frequently the screen is fully refreshed, the less ghosting. In practice, I tend to set this value to about 20 refreshes for reading texts, and will frequently manually refresh the display when reading Web content in a browser where scrolling is more prevalent. For monospace (terminal) displays, the fact that each character tends to update in the same screen cell makes the ghosting issue less significant and noticeable. What happens is that the background gets somewhat greyer as text is read or scrolled, but there isn't the effect of strong imprints under the text as with graphic or typeset content. A refresh largely has the effect of brightening the background. Noticeable, yes. Annoying? Largely not.

deleted 5y ago

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