Oppo explains how its rollable prototype phone works on video

The Oppo X 2021 concept phone is back – originally demoed at Inno Day 2020, the company is now revealing more details about its rollable phone at MWC Shangahi 2021. Here is a short video that explains how the display expands from 6.7” to 7.4”.

The action is powered by two roll motors. They use cogs that mesh into the so-called Warp Track laminate, which is similar to timing belt. The laminate is made of high-strength steel for allowing it to be both tough and thin – at its thinnest it measures only 0.1 mm, but is still strong enough to support the display.

Whether retracted or…

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