On Android smartphones, when you look into Power settings, it shows a neat usage graph, which usually looks like this (my phone has very similar #s right now):
================ 40%+ Screen ==== 10% OS ==== 8% System == Y% (Next largest program)
Is there any similar data showing how much battery is eaten by the screen of e-Ink devices, as % of overall power consumption?
Clearly not ~40%, since the whole point of eInk is that it uses a lot less battery. But did anyone quantify it? Plenty of eInk devices run Android so the data ought to be there.
UPDATE: To address clarifications requested:
I'm mostly interested in the consumption of power during active reading. But I was greatly amazed to learn that eInk draws no power for displaying unchanging page, so that's a great answer even if unanticipated one :)
Rate of page turning shouldn't be a major factor, since I'm only interested in % of consumption (unless device drains battery a lot when displaying a static page?). So any reasonable rate (2-4 pages a minute?) is OK
Backlighting should be off or discounted, since I'm interested in eIink consumption, not backlight one.
I don't really care about make and model, mostly because for ballpark ranges they should all rate similarly - on smartphones, the screen usage of ~40% seems pretty consistent across devices/models. But we can take some standard eInk Kindle model if necessary to narrow things down; whichever one there's data for.
But an ideal answer would draw from a study across different eInk devices.