"The main way Oppo has achieved the subtler crease is actually pretty cool: 3D liquid printing. The company says that the crease results primarily from height variations on the surface of the hinge underneath, and so it solved the problem by trying to remove those variations. The hinge is scanned by a laser to detect the points where the surface is uneven, then a photosensitive polymer is printed to fill those spaces, and hardened with a blast of UV light."
"You can feel the crease on this phone, but only barely, and only when you're really thinking about it. You can see it too, but only in the right light, at the right angle, and you sort of have to squint a little to spot it. This is the least obtrusive crease I've found on any foldable yet, so subtle that I really struggle to imagine how it could bother anyone."
"Oppo also claims the Find N6's crease should stay hard to spot throughout the phone's life, rather than worsening over time. To that end, it's using a slightly thicker type of foldable glass, which is more resistant to deformation and recovers its shape better too."
Oppo's Find N6 foldable phone achieves a nearly imperceptible crease through innovative 3D liquid printing technology. The crease results from height variations in the hinge surface, which Oppo addresses by scanning with lasers to detect uneven points, then printing photosensitive polymer to fill gaps and hardening with UV light. This process repeats over 20 times, reducing surface variations to just 0.05mm—thinner than human hair. The phone uses thicker foldable glass that resists deformation and recovers shape better. While the crease remains barely visible and barely tactile, Oppo claims it will remain subtle throughout the phone's lifespan rather than worsening over time.
Read at The Verge
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