Apple M4 OLED iPad Pro Users Report Grainy Image Issue

TapTechNews May 18th news, after some users unpacked and experienced the Apple M4 OLED iPad Pro tablet, reported that the image seemed grainy, and some users guessed that it might be caused by the misalignment of the double-layer tandem OLED technology.

However, some users also reported that this problem might be caused by the Mura Effect, which is a common problem of all OLED screens, mainly due to uneven brightness/color. When thin-film transistors (TFTs) supply different currents to the OLED display, some cells do not get the proper voltage they need, leaving black spots on the screen, and this phenomenon occurs. TapTechNews attached relevant pictures as follows:

On Reddit, a user named YogurtclosetKey5633 wrote:

Has anyone noticed the grain on the new tandem OLED display. This is especially noticeable when you go into the settings in a dark room without reflection. On my display, I noticed some things that looked like grains, but you have to look at it from a very close distance. It's very obvious to me because I do graphic processing.

Is it an individual problem with my screen, or have other people encountered this situation?

The netizen dtaromei believes that this is caused by the resolution. The pixel density of the iPhone 15 Pro is 460 ppi, while the pixel density of the iPad Pro 11-inch is 264. In addition, its screen is larger.