How does the 2021 iPad Pro blooming compare to older models?

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The 2021 iPad Pro's Mini-LED Display Exhibits Noticeable Blooming Compared to Older Models

The 12.9-inch iPad Pro released in 2021, featuring a mini-LED display, exhibits a more pronounced "blooming" effect than its predecessors. This phenomenon, where bright elements on screen appear to have a halo or glow around them, is particularly evident in dark environments. While older iPad Pro models also displayed similar visual artefacts, the nature of the mini-LED technology in the 2021 model makes the blooming more apparent.
Blooming Effect on the 2021 iPad Pro

Users have documented instances of blooming on the 12.9-inch iPad Pro 2021, with the effect being described as noticeable around bright areas on the screen, especially when the device is used in dark settings. For example, user @JoshTeder shared observations where the blooming effect became apparent when specific UI controls appeared. Similarly, @ParkaBlogs provided visual evidence of this blooming on his 2021 iPad Pro, highlighting that it can occur when the device is used in complete darkness due to the 2,500 dimming zones employed by the mini-LED technology.
Comparison with the 2018 iPad Pro's IPS Display

The blooming effect on the 2021 iPad Pro has been contrasted with that of the 2018 iPad Pro, which utilized an IPS display. Interestingly, the 2018 model also experienced a similar visual issue, often referred to as "IPS glow." However, this effect was spread over a larger area, making it less distracting and noticeable to the user compared to the more concentrated blooming seen on the mini-LED screen of the 2021 model.
Technological Differences and Potential for OLED

The difference in blooming perception stems from the underlying display technologies. LED LCD displays, including mini-LED, rely on backlighting, which can lead to light bleeding into surrounding pixels. Apple's 12.9-inch iPad Pro 2021 employs over 10,000 mini-LEDs organised into more than 2,500 local dimming zones to improve black levels and contrast, achieving a 1,000,000:1 contrast ratio. In contrast, OLED displays are expected to offer superior separation between dark and bright areas, as each pixel can be individually controlled, thereby mitigating the blooming effect more effectively.

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How does the 2021 iPad Pro blooming compare to older models?

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