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It seems that the Retina display is not the first time this kind of problem has been discovered, and there have been similar cases for users after the iPhone 4S was released. Specific performance can refer to the following two comparative images, in which the yellow color is the new iPad, looks normal is the iPad 2, both open automatically adjust the brightness function. However, in the photo, the new iPad is better, and the green grass is even free from PS.
Free PS New iPad Retina Screen Reveals "Yellow Door"
Not only is the problem of overheating in the upper left corner, but in recent days some users have claimed that the new iPad in use in the hands of some foreign forums found that the color tone is warmer, especially when viewing text-based web pages such as Wikipedia or some yellow-green tones. In the main picture, the color will be more yellow or green.