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LG Wing teardown reveals how that wild, rotating hinge works

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How the Wing works

LG’s Wing — with its rotating dual-display system — is one of 2020’s most interesting-looking smartphones. And thanks to YouTuber JerryRigEverything’s teardown of the device, we now know just how LG managed to make that swiveling screen a reality.

It’s actually pretty wild: there’s a hole cut through the printed circle board (PCB) and the main frame of the phone, which has a flexible ribbon cable threaded through it to allow the rotating main display to both function and twist around. There’s also a tiny hydraulic damper to serve as a shock-absorbing cushion for when you flip the phone open.

The threaded ribbon cable and hydraulic damper on the LG Wing.
Image: JerryRigEverything

The actual hinge mechanism consists of a pair of riveted plates, held together by two springs: one to hold the phone open and the other to hold it closed. There are also two sliding tracks, which JerryRigEverything notes works almost like a door chain lock to keep everything in place when sliding the phone open and closed.

The other notable bit of information is that while the Wing doesn’t have an IP rating for water resistance (unsurprising, given the moving parts), LG has apparently coated the internal circuit boards with a water-repellant coating — so it hopefully won’t instantly die if it runs into water.