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DaSal

macrumors 6502
Original poster
Mar 19, 2008
308
247
The Netherlands
I'm going to quote someone from the Apple forums, because he seemed to explain my exact "problem" I'm looking to figure out if this is considered normal.

Nicolas Charest said:
Hello,

I just got my iMac Core i5 and I'm happy to say I have not had any of the many display problems that others seem to have.

However I have noticed a display oddity that's quite subtle but bugs my eye nonetheless:

It's easier to see in the grey of the window tops, the Safari window is a perfect candidate. You have to be staring at the screen pretty closely. You can only see it while moving your head, oddly enough, or moving the window. On my display it's most prominent at the top of the display and it fades out completely by the bottom. It looks like the grey goes pixelated in mini checkerboard pattern, almost a moire. It's not just the grey or the window, I believe it is visible in any medium dark solid color.

I've seen it on other, older, iMacs, and I had come to think of it a side effect of the cheap 6-bit TN panels they were using on the older iMacs but this panel is supposed to be a good IPS 8-bit. Also, I cannot see the effect on a 24" Core Duo 2 2.93Mhz. Could it a difference in video card, nVidia VS ATI perhaps ?

It's not terrible for normal use but it keeps catching my eye as I move my head to look away from the screen so it's becoming a bit annoying.

Anyone seeing what I'm seeing ?
Is the problem with my eyes ?
Can anyone shed any sort of technical explanation ?
Should this be considered a defect ?
 
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