Quote:
Originally Posted by rkomar
I don't follow. Why does it matter what adjacent pixels are set to? I always figured there was some kind of resistance in the rotating cells that made small changes difficult to control, so a flash to inverse was required for better control of the final position. But that was just a guess. I vaguely recall that you had taken movies of the display with a microscope in the past, so you probably have a good idea of what it's doing. Can you give more details?
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You know this kind of diagram:
But I think that this is more accurate from the point of view of the distribution of the particles (but wrong on the point about the charge of the black particles, as the black particles are positive charged, not neutral):
But it still isn't accurate enough. The charged pigments would also be under the influence of voltage applied to the adjacent pixel, and not just the one directly under the capsule. So naturally the distribution of pigments in the middle of the capsule would be more homogenous for the capsules at the edge of the pixel.
If in the image above you apply negative voltage under the right two capsules the pigments are going to migrate, but there won't be a big difference in the adjacent capsule (second from the left) since the white particles on top are not going to move and the black particles in the middle are going to be shielded to some extent by the positive charges of the black particles that are already at the bottom.
In this way what you see on the screen (if you zoom in) will be white circles surrounded by grey as at the top of the capsules there will be white particles but you would also see around them the middle distribution. The capsules that have been directly adjacent to previously black pixels are going to be white on top but surrounded by darker grey. And this will be the ghost that will show the contour of whatever black shape was on the screen and then turned white.
Someone made a video of this where the screen doesn't flash to reverse:
How much ghosting one sees will be dependent on the choice of font, size of text, whether the text is anti-aliased or not.