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Users of the new Apple iPad Pro tablets with an M4 processor complain about “grainy” artifacts » on a tandem OLED display. Despite the bright images and advanced technology of what are essentially two displays, the screen appears to be flawed.
Some iPad Pro owners are complaining on Reddit about the defect, which is especially noticeable against dark backgrounds and in dark rooms. In the photo of the screen, the grain appears very noticeable against the background of the dark elements of the software interface.
The cause may be the Moore effect, which means unevenness between pixels, which is often caused by improper screen lighting. If a pixel receives too low a voltage, it may appear different in appearance from another nearby. The effect is noticeable on LCD screens that rely on a separate backlight, as well as OLED panels.
The occurrence of the effect is mainly related to production. Displays made from multiple layers can sometimes be imperfect. It is also possible that some contamination occurred during production that affected the OLED panel crystals.
This effect is a very common problem that occurs with many manufacturers and suppliers and is often impossible to avoid. In many cases, this is refused to be considered a defect.
Previously, another defect was noticed on the iPad Pro M4 displays – a problem with the HDR content on some shades of blue (dark blue and indigo). In images, HDR highlights disappear and appear white or distorted. There are no artifacts on other Apple OLED devices, such as the iPhone 15 Pro.
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“The best way to spot this is to look at the character wearing the dark blue shirt. The folds seem to shimmer like spider webs placed on the surface. Sometimes part of the image appears as an inkblot.”
Apple did not comment on the first problem, but for the second the company is already working on a software fix.
Sources: MacRumors, iMore
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