this happens with mass produced products, only bad thing is the people having these problems will have to wait a least a month before they can get a new ipad.
Screen bleed issues are inherent to *all* LCDs, although that's a pretty bad case. An LCD asked to display a black screen turns the display black but can't shut off the backlight. As a result, you end up with a black screen that's being hammered with light from the other side.
OLEDs bypass this because they don't require backlighting. If you want to get rid of it in the computing world, you typically have to pay for a high-end monitor. TN panels tend to backlight the most (they typically stress high contrast ratios and "brightness" the most) followed by S-PVA's and SIPS. That's not an absolute distinction--I'm sure there are good TN panels that only suffer from minimal backlighting, etc.
Whether or not Apple will actually take these devices back remains to be seen. The company could claim that the backlight issue is caused by the technology in question and then try to claim that hey, everyone else has this problem, too. It's worked for them before, after all.
Remove the backlight, problem solved, wait you won't be able to see anything at night :P lol.
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