Quote:
Originally Posted by ekaser
What I've never understood is this: the eInk works by having a Sagan ("billyuns and billyuns") of tiny particles, coated white on one side and black on the other. Apply charge, flip them all one way, selectively apply charge to flip SOME of them back the other way.
So... why do they have to flash BLACK and then turn some white. Why can't they flash WHITE, and then turn some of them black. That would certainly make for a far more esthetically pleasing experience.
I'm sure there's a reason, but still, curiosity and the cat...
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That's not quite the way it works. A single particle is not white on one side and black on the other, and you change the screen by flipping them. There are actually separate white particles and black particles. Each one of them is entirely a single color. When you apply a charge, one set of particles moves towards the screen and the other set moves away.
As far as flashing white/black/invert, it depends on the device. I think most of them do an invert though. It helps keep the separation of the particles clean so that you don't get a handful of them stuck on the wrong side (which is what causes ghosting).