4 ms·
Can you elaborate on what causes issues with lifetime? What kind of constants are involved in e-ink displays?
by peteradio 7y ago
Can you elaborate on what causes issues with lifetime? What kind of constants are involved in e-ink displays?
- jrockway 7y agoI didn't design these things, so all I know is that the datasheet says the lifetime will be reduced if you update it more than once every five minutes. A clock with a minutes display exceeds that by 5x. (And indeed, the display I used did break! I have no idea why, but it just stopped updating one day.) Ben explains some of the constants that can be tweaked here: https://www.youtube.com/watch?v=MsbiO8EAsGw https://www.youtube.com/watch?v=MsbiO8EAsGw
- brettcvz 7y agoI can provide some context here - from my experimentation, after 10 partial updates the contrast is notably worse, but doing a full screen refresh resets things sufficiently that the screen looks sharp again. To reduce degradations further, whenever UpNext boots it does a cycle of 10 full screen refreshes - overkill certainly, but I think of this as the “cleaning cycle.” If the screen ever starts to fade, I power cycle it, and it’s fine for a long time. I’ve been running it continuously like this for 2 years now, and while the screen is a bit less sharp than it was originally, it’s still in good shape - the photos in the article are from this week.
- blueboo 7y agoMaybe it can be incorporated into the design: refresh as a kind of 5m warning before your next meeting. I’ve certainly enough meetings not to exhaust ten refreshes before the next head’s up flash...