It's possible to use structured light in complete darkness without visibly illuminating anything. (t3.com)
That's why Honor also uses a technology called structured light. (t3.com)
The OnePlus 6 will have a smaller notch, but that's only because the phone won't have a 3D face unlock camera in place like the iPhone X. «We don't feel the need to have structured light on our phones,» Pei said. (bgr.com)