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Originally Posted by Bob Russell
I'm also just guessing without basis, but since the display keeps it's image without power due to the little balls being rotated in the proper direction, I'm thinking that the contrast wouldn't be affected directly by the voltage levels. Maybe indirectly by ghosting or by incomplete rotation of the little colored spheres due to not enough power.
I wonder if anyone has read the tech info on e-ink enough to know what's going on...
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I think that is the problem. The charge needed to switch pages is not enough. Resulting in grey and white areas. Maybe someone with a almost depleted battery can check it also?
I'm an electronic engineer so I think it is time for me to read some datasheets on the e-ink technology. :P