Recently I kept a camera in front of iPhone X and I noticed that the infrared from flood illuminator/dot projector was visible. However I noticed that infrared beam was constantly emitted (was visible through camera) even after the iPhone is unlocked. The beam was visible when the screen is on at all times. I tried with turning off Face Id and attention aware features, but the IR light is visible even then through the camera. Is this the way the flood illuminator/dot projector should work or is it some malfunction? If the infrared is emitted whenever the display is on and not just during unlocking using Face ID, then will there be any health concerns?