Does anyone know how the display works? You can see in the footage from the unveiling event, where the camera apparently has one of the units strapped to the fr

Does anyone know how the display works? You can see in the footage from the unveiling event, where the camera apparently has one of the units strapped to the front of it's lens, that virtual objects do not seem to blend in with the background. This suggests that it is able to block the transmission of light from the environment as well as add its own light to the scene. The blocking of light could be done with an LCD element but I'm not sure about illumination. I'm really curious about this.