Ultra-flexible folding device must have an OTFT with a radius of curvature of only 1mm

Over the years, we've frequently come across news about flexible display technology and how it's reshaping the way we interact with mobile devices. From folding, bending, to even extreme flexing, these innovations have captured our imagination. While we still haven't seen truly ultra-flexible phones or wearable gadgets on the market, there are already semi-flexible or curved-screen devices available today, like the LG G Flex and Samsung Galaxy Round. A while back, both Samsung and LG conducted various tests on their foldable phone prototypes, including multiple bending and stress trials. Unfortunately, the results didn’t quite meet consumer expectations. However, as technology continues to evolve, OTFT (Organic Thin-Film Transistor) technology is expected to play a key role in making future devices more flexible and durable. Recently, the UK’s Centre for Process Innovation (CPI) showcased a breakthrough in OTFT backplane manufacturing. Their new technique allows OTFT substrates to be bent to a radius of just 1mm without any noticeable drop in performance. This is a major step forward in the development of ultra-flexible displays. In the video, you might have seen some basic bends, but what’s more impressive is that during testing, the device underwent over 10,000 bending cycles. The test focused on monitoring minor changes in voltage and current, which are enough to indicate significant degradation. CPI claims that by optimizing the device stack’s multiple interfaces, they can ensure a smooth and stable bending experience. Interestingly, this isn’t entirely new. Back in 2010, Sony unveiled the world’s first 4.1-inch full-color OLED screen based on OTFT technology. This screen was incredibly flexible and could be wrapped around a cylinder with a 4mm radius. Even when rolled up, it could display dynamic images, and after being rewound 1,000 times, the display remained unaffected. Sony at the time hinted that such displays could one day power thin, durable mobile devices, though no specific timeline was given. In many futuristic concept videos, we often see mobile devices that can fold, twist, or reshape themselves. Although these ideas may not become mainstream anytime soon, they represent the direction in which technology is heading. As research progresses and materials improve, the dream of ultra-flexible, foldable devices is becoming more tangible than ever.

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