There is a report that 'light is bleeding and displayed' on the 5th generation 12.9-inch 'iPad Pro'

'Blooming ' that unintended light is generated by displaying strong light on the screen on the mini LED display (Liquid Retina XDR display) installed in the 12.9-inch model of 'iPad Pro ' released on May 21, 2021. Has been reported to occur.

Apple Says iPad Pro's XDR Display Designed to Minimize Blooming, but Some Users Still Notice the Effect --MacRumors
https://www.macrumors.com/2021/05/24/users-notice-blooming-on-ipad-pro-xdr-display/

iPad Pro's Liquid Retina XDR Display Minimizes Blooming But Still Appears For Some Users
https://wccftech.com/ipad-pros-liquid-retina-xdr-display-minimizes-blooming-but-still-appears-for-some-users/

Of the two types of iPad Pro, the 11-inch model and the 12.9-inch model, the 12.9-inch model uses a mini LED display that can reproduce the brightness of a liquid crystal display and the contrast of the organic EL level. The display has more than 10,000 LEDs set, and the screen is divided into 2500 local dimming zones to adjust the brightness, keeping the bright parts of the screen and making the black parts blacker. By expressing it, a high contrast ratio is achieved.

However, when the lit zone and the lit zone of the local dimming zone are adjacent to each other, a phenomenon called 'blooming' occurs in which the light in the lit zone leaks and a part of the screen bleeds brightly. I will do it. Apple says it has designed the Liquid Retina XDR display to improve blooming.

Nonetheless, some iPad Pro users have said that 'blooming is occurring more than expected.' 'Blooming is very noticeable when displaying UI white on a black background in a dark room,' said one user, Josh Teder. If you look at the image posted by Teder, you can see the pale light bleeding around the Apple logo and the pause mark on the video.

Here's my experience with the blooming on the M1 #iPadPro so far. It's very noticeable in dark room with UI elements on top of a black background, but that's the only scenario where I really notice it. It's expected with this display tech but still jarring coming from OLED. Pic.twitter.com/8tG1euFzqn

— Josh Teder (@JoshTeder) May 22, 2021

In OLED displays, the elements that make up each pixel emit light by themselves, so blooming does not occur on terminals that use OLED displays such as the iPhone 12. The Liquid Retina XDR display demands image quality close to that of OLED, and is believed to have been introduced in order to achieve a higher contrast ratio and due to financial problems, but some users have questioned its adoption.

On the other hand, the iPad Pro display has received a lot of high praise from overseas media.

Apple's M1 equipped 'iPad Pro' review summary, I think that it is a crazy dance with M1 installed and dry reviews stand out --GIGAZINE