While this would be interesting from a personal standpoint, it will do absolutely nothing for the actual costume.
You could always do like I helped a friend do with his Mandalorian. When he activated his rangefinder (it was a small servo that was gauntlet activated), it projected a small image against his visor in the shape of a crosshair over his eye with info around it.
This was accomplished with a clear sheet over his visor with blacklight/UV reactive images on it. Against the black of his visor, it was invisible. When the RF comes down, it activates a small blacklight. That makes the images fluoresce and look like a heads up display projected onto his visor.