LG’s recent flagship smartphones have included “Dual Screen” hardware modules as one of their headline features. In the past year, foldable phones have attracted a lot of interest thanks to the difference in experience from regular smartphones.

But foldable phones are also very expensive and fragile, which brings us to LG’s alternative: it’s basically a second display that attaches to the phone. This secondary panel can be used for anything from multitasking to gaming and beyond. Now granted, this is not the same as actually having a foldable panel and it’s far from being a similar experience, but it’s an interesting alternative. These attachments connect wirelessly, but they don’t use Bluetooth, NFC, or any similar tech. Rather, they use proprietary tech based on mmWave.

And yes, this is the same frequency spectrum that you may remember from another trendy technology—5G. This doesn’t mean that the phone and the Dual Display attachments communicate through one another via 5G, though: The term “mmWave” simply refers to radio frequencies between 30 and 300 GHz.

Now that we’ve addressed the elephant in the room, let’s talk about the tech itself. It’s made by a company called Keyssa and what makes their technology special is that it’s engineered for working just like a wired connection. And this is why they use mmWave frequencies: They allow for very high data transfer rates and very low latency. Keyssa’s chips are capable of transmitting up to 6 Gbits per second, making their tech ideal for LG’s use case. Keyssa’s tech operates in the 60GHz spectrum, and just like mmWave 5G, it has a line-of-sight limitation. In this use case, though, that’s not a problem as the communication is near-field and device-to-device, which also greatly cuts down power consumption.

This technology has a lot of potentials. Down the road, we could see a variant of this as an alternative for NFC connections, a solution for file transfers between devices, and much more. Right now, though, it’s what phones like the LG V50, V60, and the LG Velvet use for their respective Dual Screen attachments.

Originally Publish at: https://www.xda-developers.com/