Originally Posted by wnielsenbb
I agree. If you adjust horizontal to -8 on the top left, and the opposite corner is +8 it needs to cross over and be zero inbetween and every pixel between will be a split of varying magnitude.
"The worst case would be one pixel anyway." not really true. If the panel is really rotated it could be 4 pixels high on one side and 4 pixels low on the other side, and still be pixel split aligned, with -24 on one end and +24 on the other, but it wouldn't be pretty. Or maybe it would? Perhaps pixel splitting isn't as bad as it appears close up.
Well I don't know, but I just played extensively with the convergeance settings on my 5010 this evening for the first time, using the alignment grid pattern, and I noticed something very odd - seems like when I have one of the corners selected to perform the adjustments, all the pixel adjustment is actually taking place in the horizontally opposite
corner of the screen. That is to say, when the yellow box is in the upper left corner of the screen, all the pixel movement for both horizontal and vertical axis adjustment are taking place in the upper right
corner of the screen... when I set the yellow box in the lower right corner, the actual pixel movement is occuring in the lower left
corner of the screen...
So, while concentrating my view on the opposite corners while adjusting the pixels, I was able to get both red and blue pixels pretty much perfectly aligned with the green in all four corners of the screen; in the center of the screen, the red pixels were then maybe a half pixel off to the right, but dead on vertically. Blue pixels seem aligned almost perfectly over the entire screen. To achieve this, I was using adjustments right down to the individual pixel step, and not in multiples of 8 - when using only steps of 8, I could not come anywhere close to the alignment I have now.
The only thing I notice is that closer to the bottom part of the screen the pixels are not quite as sharp, and the grid lines look more like two pixels wide rather than one; I attribute this slight blur to lens shift, though, because that blur never changes no matter what the alignment settings are. My projector is mounted upside down on the ceiling with the lens level with the top of the screen edge, so I am using a good bit of lens shift. But, the pixels directly out in front of the projector, basically the top half of the screen or so, are pretty much perfectly crisp, square dots. I don't think I'll get it any better than that.